WO2021256170A1 - 異常判定システム及び発電システム - Google Patents
異常判定システム及び発電システム Download PDFInfo
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- WO2021256170A1 WO2021256170A1 PCT/JP2021/019332 JP2021019332W WO2021256170A1 WO 2021256170 A1 WO2021256170 A1 WO 2021256170A1 JP 2021019332 W JP2021019332 W JP 2021019332W WO 2021256170 A1 WO2021256170 A1 WO 2021256170A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2101/00—Supply or distribution of decentralised, dispersed or local electric power generation
- H02J2101/20—Dispersed power generation using renewable energy sources
- H02J2101/22—Solar energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the present invention relates to an abnormality determination system for determining an abnormality in a photovoltaic power generation facility and a power generation system including the abnormality determination system.
- an object of the present invention is to provide an abnormality determination system and a power generation system capable of determining an abnormality in a photovoltaic power generation facility at an earlier stage than in the prior art.
- the present inventor has scrutinized past fire cases such as modules and connectors, and found that there is a certain rule in the amount of power generation per 1 kW of system capacity per day and the amount of insolation on the inclined surface at that location. I found it. That is, when the transition of the power generation amount per 1 kW of system capacity per day (hereinafter, also referred to as a division value) with respect to the amount of solar radiation on the inclined surface per day is plotted, singular points and variations are shown as shown in the graph of FIG. 8 (a). However, as a whole, it is gradually decreasing from the time when the fire broke out two months ago, and a large decrease in the division value has occurred as a precursor before the fire broke out. I found.
- one aspect of the present invention derived is an abnormality determination system that is connected to a photovoltaic power generation facility to determine an abnormality in the photovoltaic power generation facility, and is the solar power generation facility.
- the data acquisition unit obtains the integrated value of the daily power generation amount measured by the power generation amount measurement unit, the data acquisition unit that acquires the solar radiation amount data, and the power generation amount measurement unit.
- a calculation unit that calculates the divided value by dividing by the integrated value of the solar radiation amount per day acquired in step 1 and a data storage unit that accumulates the divided value or the combination of the measured power generation amount and the solar power generation amount data.
- (1) When the average value of the division values of the reference period is calculated in advance from the division values calculated in the past, and the slope of the division value with respect to the average value of the division values of the reference period is less than the threshold value.
- (2) When the average value of the divided values in the reference period is calculated by the calculation unit, and the slope of the divided value with respect to the average value of the divided values in the reference period is less than the threshold value.
- (3) When the slope of the regression line of the division value of the judgment period falls below the threshold value.
- regression straight line here is a straight line representing the central distribution tendency of a set of data, and is a straight line calculated by the least squares method.
- the sign of abnormality can be detected by the change in the slope of the division value, and the abnormality can be determined before the abnormal heat generation or fire occurs, so that the abnormality of the photovoltaic power generation equipment can be determined earlier than before.
- the preferred aspect is that when the slope of the divided value with respect to the average value of the divided values in the reference period falls below the threshold value a plurality of times continuously or intermittently, it is determined to be abnormal.
- the determination of abnormality is based on the condition that the slope falls below the threshold value multiple times, it is possible to suppress the erroneous determination of abnormality even if there is a singular point.
- the present inventor further examined the graph of FIG. 8 (a), and as shown in the graph of FIG. 8 (b), took a moving average for one week at each division value and changed the slope of the division value. It was considered that the variation of the division value can be alleviated and the abnormality can be detected more accurately by detecting.
- the preferred aspect derived from this consideration is that the calculation unit calculates the average value of the divided values in the determination period, and the slope of the average value of the divided values in the determination period with respect to the average value of the divided values in the reference period. Is below the threshold value, it is determined to be abnormal.
- the moving average of the division value in the judgment period including the present is taken, even if there is a singular point in the division value within the judgment period, it is averaged and the abnormality can be judged more accurately.
- the solar radiation data includes the inclined surface solar radiation.
- the measured daily power generation amount is the power generation amount per 1 kW of system capacity
- the absolute value of the threshold value is due to the aged deterioration of the photovoltaic power generation facility calculated according to IEC 60904-3. It is larger than the absolute value of the tilt.
- a more preferable aspect is that the absolute value of the threshold value is 0.005 m 2 / kW ⁇ day or more.
- a preferable aspect is to have a notification means for notifying that an abnormality has occurred when it is determined that the abnormality has occurred.
- the occurrence of an abnormality is notified, so the user or the like is likely to notice the abnormality.
- the photovoltaic power generation facility has a photovoltaic power generation device and a power conditioner that converts the power generated by the photovoltaic power generation device into AC power having a predetermined frequency, and obtains error information of the power conditioner. It has an error detection unit to detect, and determines an abnormality by using the error information.
- the error information of the power conditioner is used to determine the abnormality, so that the abnormality can be determined more accurately.
- a more preferable aspect is to separate the error information into a first error information related to the amount of power generation and a second error information not related to the amount of power generation, and set the threshold value on condition that the error information is the first error information. Is to raise.
- the threshold value for determining an abnormality is lowered on condition that the error information in the power conditioner is the first error information related to the amount of power generation, the abnormality can be determined more quickly.
- a more preferred aspect has an arc information acquisition unit that acquires arc information related to arc discharge between the photovoltaic power generation device or the photovoltaic power generation device and the power conditioner, and uses the arc information. It is to judge the abnormality.
- the abnormality since the abnormality is determined using the arc information, the abnormality can be determined more quickly.
- the photovoltaic power generation device is usually affected by the actual amount of power generation due to external factors such as the shadow of the building.
- the cumulative theoretical power generation amount per week expected from the measured value of the amount of solar radiation that can be obtained from the Japan Meteorological Agency, etc. and the cumulative actual power generation amount per week measured, and the actual power generation amount is calculated. Even if it is monitored, the fluctuation of the actual power generation amount is large, and it is difficult to determine whether the fluctuation of the actual power generation amount is due to the amount of solar radiation or an abnormality.
- the solar radiation amount data and the actual power generation amount are measured multiple times in one day, and the value of the time zone to be measured fluctuates depending on the day.
- the present inventor compared the actual power generation amount between the same time zones on each day of the week, and paid attention to the maximum power generation amount for each time zone in each day of the week. That is, the theoretical power generation amount is the power generation amount excluding all external factors, and the maximum power generation amount is the maximum power generation amount in which the influence of external factors is extremely small. I thought that the amount of power generation would be close. Then, based on this idea, the present inventor extracted the cumulative actual power generation amount per week (ratio A) to the cumulative theoretical power generation amount per week and the maximum theoretical power generation amount in each time zone of each day.
- ratio B Comparing the cumulative actual power generation amount (ratio B) for one day, which is obtained by extracting the maximum actual power generation amount in each time zone of each day with respect to the cumulative theoretical power generation amount for one day, the ratio B is as shown in FIG. Takes a value close to 100% compared to the ratio A, and it is found that the variation with respect to the theoretical value can be suppressed.
- the present inventor has received this discovery that the integrated value for one day of the maximum actual power generation amount for each time zone on each day of the week is approximately close to the integrated value for one day of the maximum theoretical power generation amount for each time zone on each day of the week. Since the value is taken, it is considered that the influence of external factors can be reduced and the fluctuation due to the abnormality can be extracted by monitoring the integrated value for one day of the maximum actual power generation amount in each time zone.
- An abnormality determination system that connects to a solar power generation facility and determines an abnormality in the solar power generation facility, and is an abnormality determination system in the solar power generation facility.
- An abnormality determination system that extracts each power generation amount and integrates the extracted maximum power generation amount to determine an abnormality when the gradient of the integrated power generation amount data for one day falls below the threshold value. Is.
- the maximum power generation amount per 1 kW in each time zone within a predetermined period is extracted, and the abnormality is detected by using the fluctuation of the slope of the integrated power generation amount data for one day of the maximum power generation amount in each time zone. Since it is determined, the abnormality can be determined more accurately. According to this aspect, since the abnormality is determined by the slope of the unit power generation amount data in the determination period, the abnormality can be determined even if there is a singular point.
- One aspect of the present invention is an abnormality determination system that connects to a photovoltaic power generation facility and determines an abnormality in the photovoltaic power generation facility, and has a power generation amount measuring unit that measures the amount of power generated by the photovoltaic power generation facility.
- a data acquisition unit that acquires solar power data, a calculation unit that creates one-day integrated power generation data and one-day integrated solar power data within a predetermined period, and power generation measured by the power generation measurement unit. It has a data storage unit that stores the amount, the measured time, and the data of the solar radiation amount, or the integrated power generation amount data for one day and the integrated solar power amount data for one day, and the integrated power generation for one day.
- the amount data is created by dividing a day into time zones for each predetermined time, extracting the maximum power generation amount of each time zone within the predetermined period, and integrating the extracted maximum power generation amount.
- the solar radiation amount data for one day is created by dividing the day into time zones for each predetermined time, extracting the maximum solar radiation amount for each time zone within the predetermined period, and integrating the extracted maximum solar power amount.
- the one-day comparative integrated power generation data is calculated using the one-day photovoltaic power generation data, and the one-day integrated power generation data is divided by the one-day comparative integrated power generation data. This is an abnormality determination system that determines an abnormality when the slope of the divided value falls below the threshold value.
- One aspect of the present invention is a power generation system having the above-mentioned abnormality determination system and the above-mentioned solar power generation facility.
- abnormalities in photovoltaic power generation equipment can be determined more accurately and earlier than in the past.
- the abnormality determination system and the power generation system of the present invention it is possible to determine the abnormality of the photovoltaic power generation equipment at an earlier stage than in the conventional case.
- FIG. 1 It is a block diagram which shows schematically the power generation system of 1st Embodiment of this invention. It is a flowchart at the time of determining an abnormality in the power generation system of FIG. It is explanatory drawing at the time of extracting the maximum power generation amount in the power generation system of 3rd Embodiment of this invention, (a)-(g) are histograms of the power generation amount in each day of the week, (h) is each of one week. It is a histogram which extracted the maximum power generation amount in time. The hatching shows the maximum amount of power generation when comparing each day of the week. It is a flowchart at the time of setting a base point in the power generation system of 4th Embodiment of this invention.
- (a)-(g) is a histogram of the amount of solar radiation in each day of the week
- (h) is each of one week. It is a histogram which extracted the maximum amount of solar radiation in time. The hatching shows the maximum amount of solar radiation when comparing each day of the week.
- It is a block diagram which shows typically the power generation system of another embodiment of this invention. It is a flowchart at the time of determining an abnormality in the power generation system of another embodiment of this invention.
- the power generation system 1 of the first embodiment of the present invention is composed of a solar power generation facility 2 and an abnormality determination device 3 (abnormality determination system), via a network 100 such as an intranet or the Internet. It is possible to perform one-way communication or mutual communication with the external organizations 101, 102, the communication terminal 103, and the management company 104.
- the photovoltaic power generation facility 2 includes a photovoltaic power generation device 10, a power conditioner 11 (hereinafter, also simply referred to as a power conditioner 11), and a connection wiring 12 as main components.
- the photovoltaic power generation device 10 is equipped with a photoelectric conversion device that converts light energy into electrical energy, and specifically, a solar cell that extracts DC power from sunlight is mounted.
- the power conditioner 11 is a power conversion device that converts DC power or AC power into AC power having a predetermined frequency.
- the connection wiring 12 is a wiring for connecting the photovoltaic power generation device 10 and the power conditioner 11, and is an take-out wiring for extracting DC power from the photovoltaic power generation device 10 side to the power conditioner 11 side.
- the abnormality determination device 3 is a central processing unit composed of a calculation device that performs operations on data and a control device that controls each device, a storage device that stores programs and data, and data is input from the outside. It is equipped with a computer equipped with an input device and an output device for outputting data to the outside. As shown in FIG. 1, the abnormality determination device 3 has a calculation unit 20, a data storage unit 21, an abnormality determination unit 22, an insolation amount data acquisition unit 23, an arc information acquisition unit 24, and power generation as main components. It has a quantity measuring unit 25, an error detecting unit 26, a notification means 27, and a communication unit 28.
- the calculation unit 20 is a part that performs calculations such as calculation of a division value, which will be described later, according to various programs.
- the data storage unit 21 is a part that stores data such as the amount of power generation, information on the amount of power generation, and time.
- the data storage unit 21 of the present embodiment can store a combination of the power generation amount per 1 kW of system capacity measured by the power generation amount measurement unit 25 and the solar radiation amount data acquired by the solar radiation amount data acquisition unit 23, or the data of the divided value. It has become.
- the abnormality determination unit 22 is a portion that compares the division value with the threshold value and determines an abnormality.
- the solar radiation amount data acquisition unit 23 is a portion that acquires solar radiation amount data from the external organization 101 via the network 100 from the communication unit 28.
- the arc information acquisition unit 24 is connected to the connection wiring 12 connecting the photovoltaic power generation device 10 and the power conditioner 11, and is a portion that constantly acquires information regarding the arc discharge of the photovoltaic power generation device 10.
- the arc information acquisition unit 24 can detect the DC arc discharge caused by the disconnection of the cable, the poor contact of the connector, etc. by the waveform of the current passing through the connection wiring 12 connected to the DC power side of the power conditioner 11. ing.
- the power generation amount measuring unit 25 is a portion that constantly monitors and measures the amount of power generated by the photovoltaic power generation device 10 via the power conditioner 11.
- the error detection unit 26 is a portion that constantly monitors the presence or absence of error information in the power conditioner 11.
- the notification means 27 is a notification device that notifies the user, the management company 104, or the like that the abnormality determination unit 22 has determined that the abnormality is abnormal when the abnormality determination unit 22 determines the abnormality.
- the notification method of the notification means 27 is not particularly limited, and can be notified by, for example, sound, color, video, language, or the like.
- the notification means 27 of the present embodiment can notify the user's communication terminal 103, the management company 104, and the like from the communication unit 28 via the network 100 to notify the user.
- the communication unit 28 can communicate with external organizations 101, 102, a communication terminal 103, a management company 104, and the like via the network 100.
- External organizations 101 and 102 are organizations that publish information on the amount of solar radiation such as the total amount of solar radiation in each region.
- the communication terminal 103 is a terminal capable of one-sided communication or mutual communication via the network 100.
- the communication terminal 103 includes, for example, a fixed terminal such as a computer, a mobile terminal such as a mobile phone, a smartphone, and a tablet.
- an abnormality determination operation the recommended operation of the abnormality determination unit 22 for determining an abnormality (hereinafter, also referred to as an abnormality determination operation) will be described with reference to the flowchart of FIG.
- the counter i is set to 0 (step S1), the timer is reset, and the initial state is set (step S2). Then, the timer is turned on (step S3), and the power generation amount measuring unit 25 constantly measures the power generation amount, and calculates the power generation amount data per 1 kW of the system capacity per day from the integrated value of the power generation amount per day.
- the solar radiation amount data acquisition unit 23 acquires the daily solar radiation amount data in the installation area on the same day from the external organization 101. Then, at least the combination of the following data (1) and (2) or the following data (3) is stored in the data storage unit 21.
- Daily power generation data (2) Daily system capacity 1 kW power generation data (3)
- Daily solar radiation data and daily system capacity 1 kW power generation data in solar radiation Divided divided value (hereinafter referred to simply as divided value) Specifically, the division value is calculated by the following formula (1).
- the amount of solar radiation on the inclined surface can be calculated by the following formula (2).
- the total amount of solar radiation refers to the amount of solar radiation from the sun that reaches the horizontal surface of the ground from all over the sky, and the value published by the external organization 101 regarding meteorology such as the Japan Meteorological Agency can be used.
- the correction coefficient was published daily by an external organization 102 such as the New Energy and Industrial Technology Development Organization (NEDO) (for example, NEDO's annual monthly solar radiation database (MONSOLA-11) (URL: URL:). It can be calculated by correcting the angle in the installation area based on http://app0.infoc.nedo.go.jp/metpv/monsola.html)). Specifically, the correction coefficient can be calculated by dividing the amount of solar radiation in consideration of the azimuth angle and the inclination angle by the total amount of solar radiation in the installation area.
- NEDO New Energy and Industrial Technology Development Organization
- step S4 determines whether or not the power conditioner 11 has output error information
- step S5 the presence or absence of arc discharge is detected by the arc information acquired by the arc information acquisition unit 24 (step S5).
- the error information is information on which an error has occurred in the power controller 11, and the error information of the present embodiment includes the first error information related to the power generation amount such as a current value abnormality and the power generation amount such as a command abnormality.
- the arc information is information related to the arc discharge, and is information having a one-to-one correspondence with the arc discharge.
- the calculation unit 20 When the determination period T1 elapses (Yes in step S6) in a state where error information and arc discharge have not occurred since the timer was turned on (Yes in both steps S4 and S5), the calculation unit 20 outputs the amount of power generated on that day. And the division value is calculated from the amount of solar radiation. Further, the calculation unit 20 uses the average value of the divided values in the past reference period T2 to calculate the slope of the divided value in the determination period T1 with respect to the average value of the divided values in the past reference period T2.
- the determination period T1 is preferably 1 day or more and 2 weeks or less, and more preferably 1 day or more and 5 days or less.
- the reference period T2 is preferably 20 days or more and 2 years or less, and more preferably 1 month or more and 1 year or less.
- the determination period T1 of the present embodiment is one day, and the reference period T2 is the latest one month including the time when the determination period T1 has elapsed. That is, the reference period T2 of the present embodiment is set to be a period that is at least twice the determination period T1.
- step S7 If the slope of the division value after the elapse of the judgment period T1 with respect to the average value of the division value of the reference period T2 is less than the threshold value (Yes in step S7) and the counter i exceeds n (Yes in step S8), it is regarded as abnormal.
- the determination is made (step S9), and the notification means 27 notifies the user's communication terminal 103, the management company 104, and the like (step S10).
- the threshold value is preferably a negative value, and the absolute value is preferably a value larger than the absolute value of the inclination due to the aged deterioration of the photovoltaic power generation facility 2 calculated according to IEC 60904-3. That is, it is preferable that the absolute value of the threshold value is larger than the value of the nominal output reduction rate under the International Standardized Test Condition (STC).
- the absolute value of the threshold value is preferably at least twice the slope of the long-term reliability described in the specifications of the photovoltaic power generation device 10, and more preferably at least 0.005 m 2 / kW / day. ..
- n is a natural number of 2 or more, preferably 3 or more and 7 or less, and more preferably 4 or more and 6 or less.
- step S7 if the slope of the division value after the elapse of the judgment period T1 with respect to the average value of the division values of the reference period T2 is equal to or greater than the threshold value, that is, if it is within the threshold range (No in step S7), the process returns to step S2. Reset the timer and perform the same operation. Further, when the slope of the division value after the determination period T1 elapses with respect to the average value of the division values of the reference period T2 is less than the threshold value, that is, exceeds the threshold range (Yes in step S7), and the counter i is n or less (Yes). In step S8, No), the counter i is set to i + 1 (step S11), the process returns to step S2, the timer is reset, and the same operation is performed.
- the error information is related to the power generation amount on a one-to-one basis
- the first error information is related to the power generation amount on a one-to-one basis. It is separated into the second error information which is not information, and it is determined whether or not it is the first error information (step S12).
- step S12 When the error information is the first error information (Yes in step S12), the on / off of the flag is confirmed (step S13), and when the flag is off (Yes in step S13), the threshold value is changed (step S13). S14), turn on the flag (step S15), and return to step S5.
- changing the threshold value in step S14 it is preferable to change the threshold value to 1/3 or more and 2/3 or less of the currently set threshold value. Within this range, it is possible to suppress an erroneous determination of an abnormality while detecting the abnormality at an early stage. In the present embodiment, when the threshold value is changed in step S14, the threshold value is changed to 1/2 of the currently set threshold value.
- step S12 if the error information is the second error information in step S12 and not the first error information (No in step S12), or if the flag is on in step S13 (No in step S12), the threshold value is changed. Return to step S5 without doing so.
- step S5 when the arc discharge is detected in step S5 (No in step S5), the process proceeds to step S9 and is determined to be abnormal without determining the inclination (step S9).
- a sign of an abnormality can be detected by a change in the inclination of the divided value, and the abnormality can be determined before an abnormal heat generation or a fire occurs. It can be determined earlier than a fire or the like occurs in the power generation facility 2.
- the management company 104 when the abnormality determination unit 22 determines the abnormality, the management company 104 is notified, so that the equipment management person in charge of the management company 104 can promptly go to the site for investigation. can. That is, according to the power generation system 1 of the present embodiment, the worker can prompt the field survey and confirm whether there is any damaged part or the like, and can prevent a big disaster such as a fire.
- the abnormality is determined when the division value continuously or intermittently falls below the threshold value, erroneous determination can be suppressed and the abnormality can be determined more accurately. ..
- the abnormality determination by the abnormality determination unit 22 is different from that of the power generation system 1 of the first embodiment.
- the slope of the division value after the determination period T1 elapses with respect to the average value of the division values of the reference period T2 is compared with the threshold value.
- the slope of the average value of the divided values during the determination period T1 with respect to the average value of the divided values of the reference period T2 is compared with the threshold value.
- the slope of the moving average of the division value when the determination period T1 elapses in the determination period T1 is compared with the threshold value. That is, the p-term moving average is calculated, and the slope of the p-term moving average including the division value when the determination period T1 elapses is compared with the threshold value.
- the type of moving average is not particularly limited, but is preferably a simple moving average.
- the period of the division is shorter than the determination period T1, and the number of divisions p is preferably 3 or more and 10 or less.
- the power generation system of the second embodiment even if there is a singular point in the division value within the determination period T1, it is leveled, so that the abnormality can be determined more accurately.
- the abnormality determination by the abnormality determination unit 22 is different from that of the power generation system 1 of the first embodiment.
- the power generation amount measuring unit 25 constantly monitors the power generation amount, and the calculation unit 20 creates the integrated power generation amount data for one day for each predetermined period T4.
- a day is divided into time zones for each predetermined time T3, and the calculation unit 20 compares the amount of power generation per 1 kW in each time zone in the predetermined period T4, and each time.
- the maximum amount of power generation per 1 kW of the band is extracted.
- the extracted maximum power generation amount is integrated to calculate the integrated power generation amount for one day, and this is stored in the data storage unit 21 as the integrated power generation amount data for one day per predetermined period T4.
- the predetermined time T3 is preferably a time during which 24 hours can be equally divided.
- the predetermined time T3 is preferably more than 0 hours and less than 24 hours, and more preferably 0.5 hours or more and 3 hours or less.
- the predetermined time T3 of the present embodiment is 2 hours as shown in FIG.
- the power generation amount may be measured by the power generation amount measuring unit 25 excluding the sunset time.
- the predetermined period T4 is a period of 2 days or more, preferably 3 days or more and 2 weeks or less, and more preferably 4 days or more and 10 days or less.
- the predetermined period T4 of this embodiment is one week.
- the day is divided into time zones every two hours, and the amount of power generated for each time zone on each day is calculated and each.
- the amount of power generated in each time zone is compared between the days, and the maximum amount of power generated in each time zone is extracted (see hatching in FIGS. 3 (a) to 3 (g)).
- the maximum power generation amount for each extracted time zone is integrated to calculate the integrated power generation amount for one day, and this is used as the data for the integrated power generation amount data for one day per week. It accumulates in the accumulator 21.
- step S7 of FIG. 2 the slope of the current daily integrated power generation data with respect to the average value of the daily integrated power generation data in the determination period T1 including the present is below the threshold value (Yes in step S7).
- the counter i exceeds n (Yes in step S8), it is determined to be abnormal (step S9).
- the determination period T1 of the present embodiment is a period longer than the predetermined period T4, and is preferably a period that is twice or more the predetermined period T4. Further, it is preferable that the time when the determination period T1 has elapsed coincides with the time when the predetermined period T4 has elapsed.
- the maximum power generation amount per 1 kW in each time zone within the predetermined period T4 is extracted, and the integrated value of the maximum power generation amount in each extracted time zone is the integrated power generation for one day.
- the amount data is used, and the abnormality is determined by the inclination of the integrated power generation amount data for one day in the determination period T1. Therefore, the abnormality determination unit 22 can determine the abnormality without using the solar radiation amount data.
- the base point of the slope of the division value is not the average value of the division values of the past reference period T2, but the division value satisfying a certain condition as the base point.
- the daily power generation data is calculated, and the base point is determined each time the division value is calculated.
- the counter j is first set to 0 (step S31) and the division value is calculated (step S32), it is determined whether the division value is less than the average value of the past reference period T2 (step). S33).
- step S34 it is determined whether the counter j exceeds m.
- the current division value is set as the base point (step S35).
- m is a natural number of 2 or more, preferably 3 or more and 7 or less, and more preferably 4 or more and 6 or less.
- step S33 when the division value is equal to or greater than the average value of the past reference period T2 (No in step S33), the counter j is reset (step S36), and the process proceeds to step S32.
- the counter j is m or less in step S34 (No in step S34)
- the counter j is set to j + 1 (step S37), and the process proceeds to step S32.
- step S1 of FIG. 2 the power generation system of the present embodiment shifts to step S1 of FIG. 2, and in step S7, the inclination with respect to the base point is compared with the threshold value.
- the abnormality can be detected more accurately.
- the power generation amount measuring unit 25 constantly measures the power generation amount, and the solar radiation amount data acquisition unit 23 acquires the solar radiation amount at predetermined time intervals or constantly. Then, in the power generation system of the fifth embodiment, the calculation unit 20 creates the integrated power generation amount data for one day and the integrated solar radiation amount data for one day within the predetermined period T4. Specifically, the power generation system of the fifth embodiment, like the power generation system of the third embodiment, divides a day into time zones for each predetermined time T3, and the calculation unit 20 divides the time zone into 1 kW of each time zone in the predetermined period T4.
- the amount of power generation per kW is compared, and the maximum amount of power generation per 1 kW in each time zone is extracted. Then, the extracted maximum power generation amount is integrated to calculate the integrated power generation amount for one day, and this is stored in the data storage unit 21 as the integrated power generation amount data for one day per predetermined period T4.
- one day is divided into time zones for each predetermined time T3, and the calculation unit 20 compares the amount of solar radiation in each time zone in the predetermined period T4. , Extract the maximum amount of solar radiation in each time zone.
- the extracted maximum solar radiation amount is integrated to calculate the integrated solar radiation amount for one day, and this is stored in the data storage unit 21 as the integrated solar radiation amount data for one day per predetermined period T4. Further, the power generation system of the fifth embodiment calculates the comparative integrated power generation amount from the integrated solar radiation amount for one day, and stores this as the comparative integrated power generation amount data in the data storage unit 21.
- the comparative integrated power generation amount is calculated by the following formula (3).
- the loss coefficient is a loss that occurs when the photovoltaic power generation device 10 generates power.
- step S7 of FIG. 2 the slope of the divided value obtained by dividing the daily integrated power generation data in the determination period T1 including the present by the one-day comparative power generation data in the determination period T1 is the threshold value. (Yes in step S7), and when the counter i exceeds n (Yes in step S8), it is determined to be abnormal (Step S9).
- the determination can be made without using weather conditions such as cloudy days and rainy days, so that when the measurement point of the amount of solar radiation and the installation location of the photovoltaic power generation facility 2 are separated from each other.
- the error that occurs can be further suppressed.
- the calculation unit 20 and the like are provided in the abnormality determination device 3, but the present invention is not limited to this.
- a calculation unit 20 or the like may be provided on the external server 200 connected via the network 100 and used for calculation or the like.
- the power generation system according to the present invention also includes the network 100 and the external server 200.
- the abnormality determination device 3 is provided with an arc information acquisition unit 24, a power generation amount measurement unit 25, an error detection unit 26, a notification means 27, and a communication unit 28, and an external server 200 is provided with a calculation unit.
- a data storage unit 21, an abnormality determination unit 22, a solar radiation amount data acquisition unit 23, and a communication unit 201 are provided.
- the communication unit 28 of the abnormality determination device 3 and the communication unit 201 of the external server 200 can communicate with each other via the network 100.
- step S5 of FIG. 2 when the arc information acquisition unit 24 detects the arc discharge, the process shifts to step S9, and the abnormality determination unit 22 determines that the abnormality is present, but the present invention is limited to this. It's not something.
- the abnormality may be determined by the degree of deviation from the average of the integrated values for each short time. Specifically, as shown in the flowchart of FIG. 7, when an arc discharge is detected in step S5 (No in step S5), the timer is reset to the initial state (step S40), and then the timer is turned on. (Step S41).
- the process proceeds to step S9, and it is determined that there is an abnormality.
- the determination period T5 is a period shorter than the determination period T1 and longer than the interval of measurement of the power generation amount by the power generation amount measurement unit 25.
- the determination period T5 is preferably 2 hours or more and 3 days or less.
- the second threshold value is preferably a value of -100% or more and -10% or less.
- the degree of divergence is expressed by the following equation (4).
- the slope is calculated by the rate of change of the division value after the determination period T1 elapses with respect to the average value of the division values of the past reference period T2, but the present invention is not limited to this. ..
- the slope may be calculated from the regression line during the determination period T1. That is, the slope may be calculated by calculating the division value at predetermined time intervals in the determination period T1 and calculating the regression line for the calculated division value.
- the solar radiation amount data acquisition unit 23 has acquired the solar radiation amount data from the external organization 101 via the network 100, but the present invention is not limited to this.
- a solar radiation measuring means such as a solar radiation meter may be connected to directly measure the solar radiation at the installation site and use it as solar radiation data.
- the power generation amount per 1 kW of system capacity per day in which the integrated value of the power generation amount per day is standardized by the system capacity, is used, but the present invention is limited to this. It's not something.
- the integrated value of the amount of power generation per day may be used for calculating the slope without standardizing.
- the calculation unit 20 calculates the average value of the divided values in the past reference period T2, and the determination period T1 with respect to the average value of the divided values in the past reference period T2.
- the slope of the division value of is calculated, but the present invention is not limited to this.
- the average value of the division values of the reference period T2 may be calculated by the calculation unit 20 or another device before the determination period T1 elapses. That is, the average value of the division values of the reference period T2 may be a value calculated in advance before executing the abnormality determination operation of the abnormality determination unit 22 separately, regardless of the abnormality determination operation.
- the power generation amount measuring unit 25 constantly measures the power generation amount, but the present invention is not limited to this.
- the power generation amount measuring unit 25 may periodically measure the power generation amount at all times.
- the abnormality determination device 3 is directly connected to the network 100, but the present invention is not limited thereto.
- the abnormality determination device 3 may be indirectly connected to the network 100 via a radio base station that can be connected to the network 100.
- the comparative integrated power generation amount for one day was calculated based on the JPEA method, but the present invention is not limited to this.
- the comparative cumulative power generation amount for one day may be calculated by another method.
- the comparative integrated power generation amount for one day may be calculated according to JIS C 8907: 2005.
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Abstract
Description
家庭用の太陽光発電設備は、住宅の屋根に設置されることが多く、通常住宅では火災報知器が室内に設けられている。従来の火災報知器では、住宅の屋根に設置された太陽光発電設備の火災を速やかに検知できない問題がある。
そこで、特許文献1には、太陽電池パネルに火災報知線を設け、太陽電池パネルの温度が一定温度以上になると火災報知線から火災報知装置に信号を送信する。こうすることで、太陽電池パネルの異常発熱や火災を検知する太陽光発電システムが提案されている。
(1)過去に算出した除算値からあらかじめ基準期間の除算値の平均値を算出し、前記基準期間の除算値の平均値に対する除算値の傾きが閾値を下回った場合。
(2)前記計算部により基準期間の除算値の平均値を算出し、前記基準期間の除算値の平均値に対する除算値の傾きが閾値を下回った場合。
(3)判定期間の除算値の回帰直線の傾きが閾値を下回った場合。
また、日射量のデータや実発電量は、1日において複数回にわたって計測され、日によって計測する時間帯の値が変動する。
そこで、本発明者は、1週間の各曜日において、同一時間帯同士の実発電量を比較し、各曜日の中での時間帯ごとの最大発電量に注目した。すなわち、理論発電量は、外的要因が全て排除された発電量であり、最大発電量は、外的要因の影響が極めて小さい最大の発電量であるから、各時間帯における理論発電量と最大発電量は近い値を取ると考えた。
そして、本発明者は、この考えのもと、1週間当たりの積算理論発電量に対する1週間当たりの積算実発電量(割合A)と、各曜日の各時間帯における最大理論発電量を抽出した1日分の積算理論発電量に対する各曜日の各時間帯における最大実発電量を抽出した1日分の積算実発電量(割合B)を比較したところ、図9のように、割合Bの方が割合Aに比べて100%に近い値を取り、理論値に対するばらつきを抑えられることを発見した。
本発明者は、この発見を受けて各曜日の各時間帯の最大実発電量の1日分の積算値が概ね各曜日の各時間帯の最大理論発電量の1日分の積算値と近い値を取るから、各時間帯の最大実発電量の1日分の積算値を監視することで外的要因の影響を小さくし、異常による変動を抽出できると考察した。
本様相によれば、判定期間での単位発電量データの傾きによって、異常を判定するので、特異点があっても異常を判定できる。
太陽光発電装置10は、光エネルギーを電気エネルギーに変換する光電変換装置を実装したものであり、具体的には、太陽光から直流電力を取り出す太陽電池を実装している。
パワコン11は、直流電力又は交流電力を、所定の周波数の交流電力に変換する電力変換装置である。
接続配線12は、太陽光発電装置10とパワコン11とを接続する配線であり、太陽光発電装置10側からパワコン11側に直流電力を取り出す取出配線である。
異常判定装置3は、図1のように、主要構成要素として、計算部20と、データ蓄積部21と、異常判定部22と、日射量データ取得部23と、アーク情報取得部24と、発電量計測部25と、エラー検出部26と、報知手段27と、通信部28を有している。
データ蓄積部21は、発電量や発電量に関する情報、時間などのデータを蓄積する部位である。本実施形態のデータ蓄積部21は、発電量計測部25で計測したシステム容量1kW当たりの発電量と日射量データ取得部23で取得した日射量のデータの組み合わせ、又は除算値のデータを蓄積可能となっている。
異常判定部22は、除算値と閾値を比較し、異常を判定する部位である。
日射量データ取得部23は、通信部28からネットワーク100を介して、外部機関101から日射量のデータを取得する部位である。
アーク情報取得部24は、太陽光発電装置10とパワコン11を繋ぐ接続配線12に接続され、常時、太陽光発電装置10のアーク放電に関する情報を取得する部位である。アーク情報取得部24は、パワコン11の直流電力側に接続された接続配線12を通過する電流の波形等によってケーブルの断線やコネクタの接触不良などによって生じるDCアーク放電を検出することが可能となっている。
エラー検出部26は、常時パワコン11のエラー情報の有無を監視する部位である。
報知手段27は、異常判定部22が異常と判定したときに、使用者や管理会社104等に異常判定部22が異常と判定したことを報知する報知装置である。
報知手段27の報知方法は、特に限定されるものではなく、例えば、音、色、映像、言語等により報知することができる。
本実施形態の報知手段27は、通信部28からネットワーク100を介して使用者の通信端末103や管理会社104等に通知して報知することが可能となっている。
通信部28は、ネットワーク100を介して外部機関101,102や通信端末103、管理会社104などと通信可能となっている。
通信端末103は、ネットワーク100を介して一方通信又は相互通信が可能な端末である。通信端末103には、例えば、コンピュータなどの固定端末や携帯電話、スマートフォン、タブレット等の携帯端末などがある。
そして、少なくとも、下記(1)と(2)のデータの組み合わせ又は下記(3)のデータをデータ蓄積部21にそれぞれ蓄積する。
(1)1日当たりの発電量データ
(2)1日当たりのシステム容量1kW当たりの発電量データ
(3)1日当たりの日射量のデータと、1日当たりのシステム容量1kW当たりの発電量データを日射量で除算した除算値(以下、単に、除算値という)
具体的には、除算値は、下記の式(1)によって算出する。
補正係数は、1日ごとに国立研究開発法人新エネルギー・産業技術総合開発機構(NEDO)等の外部機関102が公表した(例えば、NEDOの年間月別日射量のデータベース(MONSOLA-11)(URL:http://app0.infoc.nedo.go.jp/metpv/monsola.html))をもとに設置地域で角度補正して算出することができる。
具体的には、補正係数は、設置地域において方位角及び傾斜角を考慮した日射量を全天日射量で除算して算出できる。
アーク情報とは、アーク放電に関連する情報であって、アーク放電と1対1で対応する情報である。
基準期間T2は、20日以上2年以下であることが好ましく、1か月以上1年以下であることがより好ましい。
本実施形態の判定期間T1は、1日であり、基準期間T2は、判定期間T1経過時を含む直近1か月間である。すなわち、本実施形態の基準期間T2は、判定期間T1の2倍以上の期間としている。
閾値の絶対値は、太陽光発電装置10の仕様書に記載された長期信頼性の傾きの2倍以上であることが好ましく、0.005m2/kW・日以上の値であることがより好ましい。
また、nは、2以上の自然数であり、3以上7以下であることが好ましく、4以上6以下であることがより好ましい。
また、基準期間T2の除算値の平均値に対する判定期間T1経過時の除算値の傾きが閾値未満、すなわち、閾値の範囲を超えており(ステップS7でYes)、カウンターiがn以下の場合(ステップS8でNo)にはカウンターiをi+1とし(ステップS11)、ステップS2に戻り、タイマーをリセットして同様の動作を行う。
なお、ステップS14において閾値を変更する場合には、閾値を現在設定している閾値の1/3以上2/3以下に変更することが好ましい。この範囲であれば、早期に異常を検知しつつ、異常の誤判定を抑制できる。本実施形態では、ステップS14において閾値を変更する場合、閾値を現在設定している閾値の1/2に変更する。
具体的には、第1実施形態では、図2のステップS7において、基準期間T2の除算値の平均値に対する判定期間T1経過時の除算値の傾きを閾値と比較する。一方、第2実施形態の発電システムは、ステップS7において、基準期間T2の除算値の平均値に対する判定期間T1中の除算値の平均値の傾きを閾値と比較する。すなわち、第2実施形態の発電システムでは、判定期間T1における判定期間T1経過時の除算値の移動平均の傾きを閾値と比較している。
すなわち、p項移動平均を算出し、判定期間T1経過時の除算値を含むp項移動平均の傾きを閾値と比較している。
移動平均の種類は、特に限定されないが、単純移動平均であることが好ましい。
区画の期間は、判定期間T1よりも短く、区画数pは、3以上10以下であることが好ましい。
第3実施形態の発電システムは、発電量計測部25によって常時発電量を監視し、計算部20によって所定期間T4ごとに1日分の積算発電量データを作成するものである。
具体的には、第3実施形態の発電システムは、1日を所定時間T3ごとに時間帯を区切り、計算部20によって所定期間T4における各時間帯の1kW当たりの発電量を比較し、各時間帯の1kW当たりの最大発電量をそれぞれ抽出する。そして、抽出した最大発電量を積算して1日分の積算発電量を算出し、これを所定期間T4当たりの1日分の積算発電量データとしてデータ蓄積部21に蓄積する。
所定時間T3は、0時間超過24時間未満であることが好ましく、0.5時間以上3時間以下であることがより好ましい。
本実施形態の所定時間T3は、図3のように、2時間である。なお、発電量計測部25による発電量の計測は、日没時間を除いてもよい。
所定期間T4は、2日以上の期間であり、3日以上2週間以下であることが好ましく、4日以上10日以下であることがより好ましい。本実施形態の所定期間T4は、1週間である。
また判定期間T1の経過時は、所定期間T4の経過時と一致していることが好ましい。
カウンターjがm超過の場合(ステップS34でYes)には、現在の除算値を基点に設定する(ステップS35)。
このとき、mは、2以上の自然数であり、3以上7以下であることが好ましく、4以上6以下であることがより好ましい。
ステップS34においてカウンターjがm以下の場合(ステップS34でNo)には、カウンターjをj+1とし(ステップS37)、ステップS32に移行する。
具体的には、第5実施形態の発電システムは、第3実施形態の発電システムと同様、1日を所定時間T3ごとに時間帯を区切り、計算部20によって所定期間T4における各時間帯の1kW当たりの発電量を比較し、各時間帯の1kW当たりの最大発電量をそれぞれ抽出する。そして、抽出した最大発電量を積算して1日分の積算発電量を算出し、これを所定期間T4当たりの1日分の積算発電量データとしてデータ蓄積部21に蓄積する。
第5実施形態の発電システムは、上記に加えて、図5のように、1日を所定時間T3ごとに時間帯を区切り、計算部20によって所定期間T4における各時間帯の日射量を比較し、各時間帯の最大日射量をそれぞれ抽出する。そして、抽出した最大日射量を積算して1日分の積算日射量を算出し、これを所定期間T4当たりの1日分の積算日射量データとしてデータ蓄積部21に蓄積する。
さらに、第5実施形態の発電システムは、この1日分の積算日射量から比較積算発電量を算出し、これを比較積算発電量データとしてデータ蓄積部21に蓄積する。
比較積算発電量は、下記の式(3)によって算出する。
例えば、図6に示される発電システムは、異常判定装置3にアーク情報取得部24、発電量計測部25、エラー検出部26、報知手段27、及び通信部28を設け、外部サーバー200に計算部20、データ蓄積部21、異常判定部22、日射量データ取得部23、及び通信部201を設けている。この場合、異常判定装置3の通信部28と、外部サーバー200の通信部201は、ネットワーク100を介して相互に通信可能となる。
タイマーオンになってから判定期間T5が経過し(ステップS42でYes)、基準期間T2の除算値の平均値に対する判定期間T5終了時の除算値の乖離度が第2閾値を超過すると(ステップS43でYes)、ステップS9に移行し、異常と判定する。
ここで、判定期間T5は、判定期間T1よりも短い期間であって発電量計測部25による発電量の測定の間隔以上の期間である。判定期間T5は、2時間以上3日以下であること好ましい。
第2閾値は、-100%以上-10%以下の値であることが好ましい。
また、乖離度は、以下の式(4)で表される。
2 太陽光発電設備
3 異常判定装置(異常判定システム)
10 太陽光発電装置
11 パワーコンディショナー
12 接続配線
20 計算部
21 データ蓄積部
22 異常判定部
23 日射量データ取得部
24 アーク情報取得部
25 発電量計測部
26 エラー検出部
27 報知手段
101,102 外部機関
Claims (13)
- 太陽光発電設備に接続して前記太陽光発電設備の異常を判定する異常判定システムであって、
前記太陽光発電設備での発電量を計測する発電量計測部と、
日射量のデータを取得するデータ取得部と、
前記発電量計測部で計測した1日当たりの発電量の積算値を、前記データ取得部で取得した1日当たりの前記日射量の積算値で除算して除算値を算出する計算部と、
前記計測した発電量と前記日射量のデータの組み合わせ、又は前記除算値を蓄積するデータ蓄積部を有し、
以下の(1)~(3)のいずれかの場合に、異常と判定する、異常判定システム。
(1)過去に算出した除算値からあらかじめ基準期間の除算値の平均値を算出し、前記基準期間の除算値の平均値に対する除算値の傾きが閾値を下回った場合。
(2)前記計算部により基準期間の除算値の平均値を算出し、前記基準期間の除算値の平均値に対する除算値の傾きが閾値を下回った場合。
(3)判定期間の除算値の回帰直線の傾きが閾値を下回った場合。 - 前記基準期間の除算値の平均値に対する除算値の傾きが閾値を連続的又は断続的に複数回下回った場合に、異常と判定する、請求項1に記載の異常判定システム。
- 前記計算部は、判定期間の除算値の平均値を算出し、
前記基準期間の除算値の平均値に対する前記判定期間の除算値の平均値の傾きが閾値を下回った場合に、異常と判定する、請求項1に記載の異常判定システム。 - 前記日射量のデータは、傾斜面日射量を含む、請求項1~3のいずれか1項に記載の異常判定システム。
- 前記計測した1日当たりの発電量は、システム容量1kW当たりの発電量であり、
前記閾値の絶対値は、IEC 60904-3に準じて算出される前記太陽光発電設備の経年劣化による傾きの絶対値よりも大きい、請求項1~4のいずれか1項に記載の異常判定システム。 - 前記閾値の絶対値は、0.005m2/kW・日以上の値である、請求項5に記載の異常判定システム。
- 異常と判定したときに、異常が発生したことを報知する報知手段を有する、請求項1~6のいずれか1項に記載の異常判定システム。
- 前記太陽光発電設備は、太陽光発電装置と、前記太陽光発電装置で発電された電力を所定の周波数の交流電力に変換するパワーコンディショナーを有し、
前記パワーコンディショナーのエラー情報を検出するエラー検出部を有し、
前記エラー情報を使用して異常を判定する、請求項1~7のいずれか1項に記載の異常判定システム。 - 前記エラー情報を発電量に関連する第1エラー情報と発電量に関連しない第2エラー情報に分別し、前記エラー情報が前記第1エラー情報であることを条件として前記閾値を上げる、請求項8に記載の異常判定システム。
- 前記太陽光発電装置又は前記太陽光発電装置と前記パワーコンディショナーとの間でのアーク放電に関連するアーク情報を取得するアーク情報取得部を有し、
前記アーク情報を使用して異常を判定する、請求項8又は9に記載の異常判定システム。 - 太陽光発電設備に接続して前記太陽光発電設備の異常を判定する異常判定システムであって、
前記太陽光発電設備での発電量を計測する発電量計測部と、
所定期間内の1日分の積算発電量データを作成する計算部と、
前記発電量計測部で計測した発電量と計測した時間の組み合わせ、又は前記1日分の積算発電量データを蓄積するデータ蓄積部を有し、
前記1日分の積算発電量データは、1日を所定時間ごとに時間帯を区切り、前記所定期間内における各時間帯の最大発電量をそれぞれ抽出し、抽出した最大発電量を積算して作成されるものであり、
前記1日分の積算発電量データの傾きが閾値を下回った場合に、異常と判定する、異常判定システム。 - 太陽光発電設備に接続して前記太陽光発電設備の異常を判定する異常判定システムであって、
前記太陽光発電設備での発電量を計測する発電量計測部と、
日射量のデータを取得するデータ取得部と、
所定期間内の1日分の積算発電量データ及び1日分の積算日射量データを作成する計算部と、
前記発電量計測部で計測した発電量と計測した時間と前記日射量のデータの組み合わせ、又は前記1日分の積算発電量データ及び1日分の積算日射量データを蓄積するデータ蓄積部を有し、
前記1日分の積算発電量データは、1日を所定時間ごとに時間帯を区切り、前記所定期間内における各時間帯の最大発電量をそれぞれ抽出し、抽出した最大発電量を積算して作成されるものであり、
前記1日分の日射量データは、1日を所定時間ごとに時間帯を区切り、前記所定期間内における各時間帯の最大日射量をそれぞれ抽出し、抽出した最大日射量を積算して作成されるものであり、
1日分の比較積算発電量データが前記1日分の日射量データを用いて算出され、前記1日分の積算発電量データを前記1日分の比較積算発電量データで除算した除算値の傾きが閾値を下回った場合に、異常と判定する、異常判定システム。 - 請求項1~12のいずれか1項に記載の異常判定システムと、前記太陽光発電設備を有する、発電システム。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114928085A (zh) * | 2022-04-02 | 2022-08-19 | 清华大学 | 一种容量配置的方法、装置及电子设备 |
| CN119026068A (zh) * | 2024-10-31 | 2024-11-26 | 国网山东省电力公司营销服务中心(计量中心) | 基于时序分析的台区光伏发电量智慧监测预警系统 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250200018A1 (en) * | 2022-03-16 | 2025-06-19 | Laplace System Co., Ltd. | Data structure containing identifier for numerical data, and numerical value management system using same |
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| CN118013450B (zh) * | 2024-04-10 | 2024-06-18 | 甘肃自然能源研究所(联合国工业发展组织国际太阳能技术促进转让中心) | 一种基于太阳总辐射计算的光伏优化系统 |
| CN119848706B (zh) * | 2025-03-21 | 2025-06-27 | 众诚测试科技(大连)有限公司 | 基于物联网的水利系统监测方法 |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011216811A (ja) * | 2010-04-02 | 2011-10-27 | Sharp Corp | 太陽電池異常診断システム、太陽電池異常診断装置および太陽電池異常診断方法 |
| JP2012055090A (ja) * | 2010-09-01 | 2012-03-15 | Ntt Facilities Inc | 太陽光発電診断装置 |
| JP2012205078A (ja) * | 2011-03-25 | 2012-10-22 | Sumitomo Electric Ind Ltd | 太陽光発電用監視システム |
| JP2013073537A (ja) * | 2011-09-29 | 2013-04-22 | Omron Corp | 情報処理装置、発電量算出方法、および、プログラム |
| JP2014216507A (ja) * | 2013-04-25 | 2014-11-17 | 協立機電工業株式会社 | 太陽光発電設備故障判定方法および装置 |
| JP2015102882A (ja) * | 2013-11-21 | 2015-06-04 | 能美防災株式会社 | 火災検出システム |
| WO2016166991A1 (ja) * | 2015-04-17 | 2016-10-20 | パナソニックIpマネジメント株式会社 | 太陽光発電設備の診断システムおよびプログラム |
| JP2017028917A (ja) * | 2015-07-25 | 2017-02-02 | ミヨシ電子株式会社 | パワコン監視システム及び太陽光発電プラント |
| JP2017184355A (ja) | 2016-03-29 | 2017-10-05 | 能美防災株式会社 | 太陽光発電システムおよび太陽光パネルの温度異常検知方法 |
| JP2018170853A (ja) * | 2017-03-29 | 2018-11-01 | 国立大学法人 奈良先端科学技術大学院大学 | 太陽光発電モジュール評価方法、評価装置および評価プログラム |
| JP2019004529A (ja) * | 2015-11-06 | 2019-01-10 | パナソニックIpマネジメント株式会社 | 充放電制御装置、充放電制御方法及びプログラム |
| KR20200059704A (ko) * | 2018-11-21 | 2020-05-29 | 안현철 | 고장 예측 알고리즘을 이용한 태양광 발전 관리 시스템 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI365965B (en) * | 2009-07-24 | 2012-06-11 | Pegatron Corp | Sun-tracking device for solar cells |
| JP5581965B2 (ja) * | 2010-01-19 | 2014-09-03 | オムロン株式会社 | Mppt制御器、太陽電池制御装置、太陽光発電システム、mppt制御プログラム、およびmppt制御器の制御方法 |
| DE102013002117A1 (de) * | 2013-02-08 | 2014-08-14 | Werma Holding Gmbh + Co. Kg | Betriebszustandswarnvorrichtung |
| JP6419046B2 (ja) * | 2015-09-15 | 2018-11-07 | 本田技研工業株式会社 | 蓄電システムの故障形態判定装置 |
| US11487994B2 (en) * | 2018-07-19 | 2022-11-01 | Sacramento Municipal Utility District | Techniques for estimating and forecasting solar power generation |
-
2021
- 2021-05-21 WO PCT/JP2021/019332 patent/WO2021256170A1/ja not_active Ceased
- 2021-05-21 EP EP21825373.0A patent/EP4170618A4/en active Pending
- 2021-05-21 JP JP2022532419A patent/JP7618675B2/ja active Active
- 2021-05-21 US US18/001,826 patent/US12273068B2/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011216811A (ja) * | 2010-04-02 | 2011-10-27 | Sharp Corp | 太陽電池異常診断システム、太陽電池異常診断装置および太陽電池異常診断方法 |
| JP2012055090A (ja) * | 2010-09-01 | 2012-03-15 | Ntt Facilities Inc | 太陽光発電診断装置 |
| JP2012205078A (ja) * | 2011-03-25 | 2012-10-22 | Sumitomo Electric Ind Ltd | 太陽光発電用監視システム |
| JP2013073537A (ja) * | 2011-09-29 | 2013-04-22 | Omron Corp | 情報処理装置、発電量算出方法、および、プログラム |
| JP2014216507A (ja) * | 2013-04-25 | 2014-11-17 | 協立機電工業株式会社 | 太陽光発電設備故障判定方法および装置 |
| JP2015102882A (ja) * | 2013-11-21 | 2015-06-04 | 能美防災株式会社 | 火災検出システム |
| WO2016166991A1 (ja) * | 2015-04-17 | 2016-10-20 | パナソニックIpマネジメント株式会社 | 太陽光発電設備の診断システムおよびプログラム |
| JP2017028917A (ja) * | 2015-07-25 | 2017-02-02 | ミヨシ電子株式会社 | パワコン監視システム及び太陽光発電プラント |
| JP2019004529A (ja) * | 2015-11-06 | 2019-01-10 | パナソニックIpマネジメント株式会社 | 充放電制御装置、充放電制御方法及びプログラム |
| JP2017184355A (ja) | 2016-03-29 | 2017-10-05 | 能美防災株式会社 | 太陽光発電システムおよび太陽光パネルの温度異常検知方法 |
| JP2018170853A (ja) * | 2017-03-29 | 2018-11-01 | 国立大学法人 奈良先端科学技術大学院大学 | 太陽光発電モジュール評価方法、評価装置および評価プログラム |
| KR20200059704A (ko) * | 2018-11-21 | 2020-05-29 | 안현철 | 고장 예측 알고리즘을 이용한 태양광 발전 관리 시스템 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4170618A4 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114928085A (zh) * | 2022-04-02 | 2022-08-19 | 清华大学 | 一种容量配置的方法、装置及电子设备 |
| CN119026068A (zh) * | 2024-10-31 | 2024-11-26 | 国网山东省电力公司营销服务中心(计量中心) | 基于时序分析的台区光伏发电量智慧监测预警系统 |
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