WO2015015527A1 - Dispositif de commande d'alimentation électrique - Google Patents

Dispositif de commande d'alimentation électrique Download PDF

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Publication number
WO2015015527A1
WO2015015527A1 PCT/JP2013/004590 JP2013004590W WO2015015527A1 WO 2015015527 A1 WO2015015527 A1 WO 2015015527A1 JP 2013004590 W JP2013004590 W JP 2013004590W WO 2015015527 A1 WO2015015527 A1 WO 2015015527A1
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WIPO (PCT)
Prior art keywords
storage battery
load
power
amount
battery
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Ceased
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PCT/JP2013/004590
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English (en)
Japanese (ja)
Inventor
小林　美佐世
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2015529215A priority Critical patent/JPWO2015015527A1/ja
Priority to PCT/JP2013/004590 priority patent/WO2015015527A1/fr
Publication of WO2015015527A1 publication Critical patent/WO2015015527A1/fr
Anticipated expiration legal-status Critical
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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
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
    • 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
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/865—Battery or charger load switching, e.g. concurrent charging and load supply

Definitions

  • the present invention relates to a power supply control device that controls power supply from a distributed power source to a plurality of consumers.
  • the terminal voltage of the secondary battery fluctuates according to the amount of discharge from the secondary battery to the load, if the amount of discharge to the load decreases by cutting off the discharge, the terminal voltage of the secondary battery is discharged. Possible to exceed the forbidden voltage.
  • the discharge is not resumed unless the voltage between the terminals of the secondary battery pack becomes equal to or higher than the predetermined voltage. I am doing so. That is, in the secondary battery pack of Document 1, by providing a hysteresis between the discharge inhibition voltage and the predetermined voltage, a hunting operation that repeatedly interrupts and restarts discharge is avoided.
  • the present invention has been made in view of the above-described reasons, and an object thereof is to provide a power supply control device that suppresses deterioration of a storage battery due to overdischarge while stabilizing power supply from the storage battery.
  • a power supply control device includes a control unit that controls power supply to a load from a distributed power source that accumulates power generated by a power generation device in a storage battery and supplies the power stored in the storage battery to the outside.
  • the control unit determines that the remaining amount of power stored in the storage battery is below a predetermined value, and performs control to reduce the supply amount to the load.
  • An increase in the battery voltage of the storage battery due to the control for reducing the supply amount to the load is configured not to determine that the remaining amount of power storage is increased, but to continue the control to reduce the supply amount to the load It is characterized by that.
  • control unit performs control to increase the supply amount to the load when the storage battery is fully charged in a state where the supply amount to the load is being reduced. It is also preferred to be configured to do so.
  • control unit is charged until the storage battery is fully charged when the battery voltage of the storage battery is equal to or greater than a second threshold value and the variation range of the battery voltage is equal to or less than a predetermined allowable range. It is also preferable to be configured to determine that
  • the control unit determines that the storage battery is charged until it is fully charged when a state where the battery voltage of the storage battery is equal to or greater than a third threshold value indicating a fully charged state continues for a predetermined time or longer. It is also preferable to be configured.
  • control unit is configured to perform control to determine that charging is in progress because the battery voltage of the storage battery exceeds a predetermined allowable range, and thus determines that charging is in progress, and increases the supply amount to the load. It is also preferable.
  • the control unit determines that charging is in progress because the battery voltage of the storage battery exceeds a predetermined allowable range, and thus determines that charging is in progress. It is also preferable to perform a control to increase the supply amount to the load if the rising speed to be increased is larger than a predetermined reference value.
  • the control unit reduces the battery voltage due to the control for increasing the supply amount to the load. It is also preferable that the control is not performed so that the amount of supply to the load is not reduced without determining that the amount is reduced.
  • control unit is configured to perform control to reduce the supply amount to the load when the supply amount supplied to the load from a fully charged state of the storage battery exceeds a fourth threshold value. It is also preferable.
  • the power generation device includes a first power generation device that generates natural energy and a second power generation device whose power generation amount can be adjusted by the control unit, and the first power generation device and the second power generation device.
  • the control unit increases the power generation amount of the second power generation device when the power generation amount of the first power generation device is lower than a fifth threshold value. It is also preferable to be configured.
  • control unit is configured to adjust the amount of supply to the load according to the remaining amount of power stored in the storage battery.
  • the power supply control device of this embodiment is used in a power distribution system that supplies power from a distributed power source to a plurality of consumers.
  • a power distribution system to which the power supply control device of the present embodiment is applied is installed in a non-electrified area such as a remote area or an island, and power generated by a distributed power source is supplied to a consumer (for example, a general dwelling unit) It is a relatively small system that is supplied to public facilities such as schools, hospitals, etc.
  • FIG. 1 is a diagram illustrating an example of a power distribution system.
  • This power distribution system includes a power supply control device 1 that distributes power generated by a distributed power supply 10 (for example, AC 220V AC power) to dwelling units 20 of a plurality of consumers. I have.
  • the power distribution destination of the power distribution system is not limited to the general dwelling unit 20 where individual consumers live, but may be a public facility such as a school facility or a hospital, or a business facility such as a factory or a store.
  • the distributed power source 10 includes a photovoltaic power generation (PV) 11, a DC / DC converter 12, a storage battery 13, and a DC / AC converter 14.
  • PV photovoltaic power generation
  • the solar power generation device 11 includes a plurality of solar battery panels that respectively convert sunlight into electric energy.
  • the power generation capacity of the solar power generation device 11 can be appropriately changed according to the power demand of the supply destination.
  • the DC / DC converter 12 stabilizes the output of the solar power generator 11 and converts it into a substantially constant DC voltage (for example, DC 48 V), and charges the storage battery 13.
  • the storage battery 13 is made of, for example, a lead storage battery, and stores the electric power generated by the solar power generation device 11.
  • the DC / AC converter 14 converts the direct current voltage discharged from the storage battery 13 into alternating current (for example, AC 220 V) and outputs it to the power supply control device 1.
  • the power generation capacity of the solar power generation device 11 and the storage capacity of the storage battery 13 are prepared in a necessary and sufficient amount with respect to the scale of the load, a large amount of money is required for the introduction and operation of the power distribution system. Therefore, in this embodiment, the power generation capacity and the storage capacity are not prepared in an amount sufficient to satisfy the demand for the entire load, and when the power demand exceeds the power supply amount, the power supply to the entire load is stopped. there is a possibility.
  • the power supply control device 1 adjusts the power (supply amount) supplied to the load based on the power generation amount of the solar power generation device 11, the remaining power storage amount of the storage battery 13, and the like. Will be described later.
  • the power supply control device 1 includes a plurality of switches 2, a measuring unit 3, a control unit 4, a storage unit 5, and a plurality of current detectors 6.
  • the power supply control device 1 is configured by housing a switch 2, a measurement unit 3, a control unit 4, a storage unit 5, and a current detector 6 inside a box made of, for example, a 20-foot container. .
  • the power supply control device 1 is installed near the distributed power supply 10.
  • the power feeding control device 1 branches the trunk line 30 connected to the distributed power supply 10 into a plurality of branch circuits 31, and the loads of the corresponding dwelling units 20 are connected to the branch circuits 31.
  • a switch 2 is connected to each branch circuit 31.
  • the switch 2 is composed of, for example, an electromagnetic relay.
  • a distributed power source 10 is connected to the primary side of the switch 2, and a load (not shown) in the dwelling unit 20 is connected to the secondary side of the switch 2 via a distribution line 32. Is connected.
  • the switch 2 is switched on / off by the control unit 4. When the switch 2 is turned on, electric power is supplied from the distributed power supply 10 to the load in the corresponding dwelling unit 20 via the distribution line 32. When the switch 2 is turned off, the power supply from the distributed power supply 10 to the corresponding load in the dwelling unit 20 is cut off. That is, the power supply control device 1 can individually control power supply to the plurality of dwelling units 20.
  • Each branch circuit 31 is provided with a current detector 6 for detecting a current flowing through the branch circuit 31.
  • the current detector 6 is composed of, for example, a magnetoelectric conversion element using the Hall effect, and the magnitude of the output changes according to the magnitude of the current flowing through the branch circuit 31.
  • the measuring unit 3 takes in the output of the current detector 6 at a predetermined measurement interval, and based on the output of the current detector 6, the power consumption due to the load (the load in the dwelling unit 20) connected to each branch circuit 31. As well as the total power consumption.
  • the measuring unit 3 measures the output voltage of the storage battery 13. Since the remaining amount of electricity stored in the storage battery 13 cannot be directly measured, the measuring unit 3 measures the output voltage of the storage battery 13 that changes according to the remaining amount of electricity stored in order to grasp the remaining amount of electricity stored.
  • the storage unit 5 includes an electrically rewritable nonvolatile memory such as an EEPROM (ElectricallyrErasable Programmable Read-Only Memory) or a RAM (Random Access Memory) provided with a backup power source.
  • the storage unit 5 stores data such as the power demand at the load measured by the measurement unit 3, the remaining amount of power stored in the storage battery 13, and the generated power of the solar power generation device 11.
  • various threshold values which will be described later, and a control mode of the switch 2 are registered in the storage unit 5 in advance.
  • the control mode two modes of a control mode M1 for switching all the switches 2 on and a control mode M2 for switching all the switches 2 off are set in advance.
  • the control unit 4 controls on / off of the plurality of switches 2 based on the battery voltage and the power consumption at the load measured by the measurement unit 3 and the threshold value registered in the storage unit 5.
  • the power distribution system using the power supply control device 1 of the present embodiment has the above-described configuration, and the operation will be described below with reference to FIG.
  • the control unit 4 periodically compares the battery voltage of the storage battery 13 measured by the measurement unit 3 with the first threshold value V1 (for example, 42V) registered in the storage unit 5.
  • V1 for example, 42V
  • the control unit 4 selects the control mode M1 to switch on all the switches 2 and supplies power to the loads in each dwelling unit 20.
  • step S1 the control unit 4 determines that the remaining amount of power stored in the storage battery 13 has decreased below a predetermined value, selects the control mode M2, and performs all open / close operations.
  • the device 2 is switched off, and control is performed to reduce the supply amount to the load.
  • the condition 1 that the control mode is immediately after switching to the mode M2 or the total power consumption of the load measured by the measuring unit 3 is If any one of the conditions 2 that decrease by a certain amount or more from the previous measurement is satisfied, the control unit 4 determines that the battery voltage has increased due to the control for decreasing the supply amount to the load, and the storage battery 13 It is determined that the remaining amount of electricity has not recovered. In this case, the control unit 4 does not switch the control mode to the mode M1, and keeps all the switches 2 off.
  • the fixed amount may be a fixed value, or an average fluctuation range may be obtained from the correlation between fluctuations in power consumption and battery voltage, and this value may be used as the fixed amount.
  • the control unit 4 assumes that the remaining amount of power stored in the storage battery 13 has recovered. Judgment is made, the control mode is switched to mode M1 (step S2), and all the switches 2 are turned on.
  • the battery voltage decreases due to an increase in the supply amount to the load, but the control unit 4 is caused by increasing the supply amount to the load.
  • the decrease in the battery voltage may not be determined as a decrease in the remaining battery level.
  • the condition 3 that is immediately after switching the control mode to the mode M1 or the total power consumption of the load measured by the measuring unit 3 is If any of the conditions 4 that increase by a certain amount or more from the previous measurement is satisfied, the control unit 4 determines that the battery voltage has decreased due to the increase in the supply amount to the load, and the remaining charge of the storage battery 13 Judge that the amount has not decreased.
  • the control unit 4 selects the control mode M1 to switch on all the switches 2 and supplies power to the loads in each dwelling unit 20.
  • the control unit 4 determines that the remaining amount of power stored in the storage battery 13 has decreased, selects the control mode M2, and sets all the switches. 2 is turned off, and control to lower the supply amount to the load is performed.
  • the control unit 4 performs control to increase the supply amount to the load. It may be determined that the battery voltage is not lowered, and control for reducing the supply amount to the load may be performed.
  • control unit 4 periodically compares the battery voltage of the storage battery 13 with the threshold value V10 (for example, 54 V) corresponding to the battery voltage at the time of full charge. Then, the battery 13 is charged until it is fully charged, and when the battery voltage becomes equal to or higher than the threshold value V10 (step S3 in FIG. 3), the control unit 4 determines that the battery 13 is charged until it is fully charged. Mode M1 is selected and all switches 2 are turned on.
  • V10 for example, 54 V
  • the control unit 4 turns off the switch 2 to stop the discharge from the storage battery 13, and then the storage battery 13 is fully charged. Until it becomes, discharge from the storage battery 13 to the load is stopped.
  • the storage battery 13 such as a lead storage battery, it is preferable to charge the battery 13 to a full charge immediately after discharging, and the life of the storage battery 13 can be extended.
  • control unit 4 determines whether or not the battery is fully charged by comparing the threshold value corresponding to the battery voltage at the time of full charge and the battery voltage.
  • the method of determining whether or not the battery is fully charged is not limited to the above method.
  • FIG. 4 is a diagram showing the battery voltage during charging, and the battery voltage gradually increases while repeatedly increasing and decreasing as the charging operation of the storage battery 13 is repeated intermittently according to the fluctuation of the amount of power generation. .
  • the storage battery 13 is in a fully charged state.
  • the control unit 4 determines that the battery is fully charged by capturing this behavior, and this determination method will be described below.
  • the measuring unit 3 periodically measures the battery voltage of the storage battery 13 and the power consumption at the load.
  • the control unit 4 periodically captures the battery voltage from the measurement unit 3 and compares the battery voltage captured from the measurement unit 3 with the second threshold value V2. If the battery voltage is not less than the second threshold value V2 and the change range of the battery voltage is not more than a predetermined allowable range dV1 (for example, 0.5 V), the control unit 4 can fully detect the battery voltage 10 times or more continuously.
  • a predetermined allowable range dV1 for example, 0.5 V
  • the control unit 4 Determines that the storage battery 13 has been fully charged.
  • the allowable range dV1 of the change range of the battery voltage is a fixed value, but when there is consumption at the load, a variable value is obtained based on the record of the correlation between the power consumption at the load and the change of the battery voltage. May be given as In addition, if there is consumption at the load, if the size of the load varies, the battery voltage also varies accordingly. Therefore, even if the variation of the load is added to the allowable range of the variation range of the battery voltage Good.
  • control unit 4 determines that the battery is fully charged if the state in which the battery voltage is equal to or higher than the second threshold value V2 and the change width of the battery voltage is equal to or lower than the predetermined allowable range dV1 can be detected continuously for a predetermined number of times. However, if this state continues for a predetermined time or more, it may be determined that the battery is fully charged.
  • the method for detecting the full charge of the storage battery 13 is not limited to the above method, and the control unit 4 determines that the battery voltage is maintained when the state where the battery voltage is equal to or higher than the third threshold V3 indicating the full charge state continues for a predetermined time T1 or longer. It may be determined that the battery 13 has been charged until it is fully charged.
  • the storage unit 5 for example, 54V is registered as the third threshold value V3 indicating the fully charged state, and for example, 30 is set as a criterion (predetermined time T1) for the time during which the battery voltage continues to be equal to or higher than the third threshold value V3. Minutes are registered.
  • FIG. 5 is a diagram showing the battery voltage during charging, and the battery voltage gradually increases while repeatedly increasing and decreasing as the charging operation of the storage battery 13 is intermittently repeated in accordance with fluctuations in the power generation amount. .
  • the measurement unit 3 periodically measures the battery voltage of the storage battery 13 and the power consumption at the load.
  • the control unit 4 periodically takes in the battery voltage from the measuring unit 3, compares the battery voltage periodically taken in from the measuring unit 3 with the third threshold value V3, and the battery voltage becomes equal to or higher than the third threshold value V3. If the state continues for a predetermined time T1 or longer, it is determined that the battery has been charged until it is fully charged.
  • control unit 4 periodically compares the battery voltage with the third threshold value V3, and if the state where the battery voltage is equal to or higher than the third threshold value V3 can be continuously detected a predetermined number of times or more, the controller 4 is fully charged. It may be determined that the battery has been charged.
  • the controller 4 can continuously detect a state in which the battery voltage is equal to or higher than the second threshold value V2 and the change width of the battery voltage is equal to or lower than a predetermined allowable range dV1 (for example, 0.5 V).
  • a predetermined allowable range dV1 for example, 0.5 V.
  • control unit 4 determines that the storage battery 13 has been fully charged after switching to the control mode M2
  • the control unit 4 performs control to increase the supply amount to the load.
  • control for increasing the supply amount to the load may be performed.
  • the power source for charging the storage battery 13 is a power generation device that generates power with natural energy, such as the solar power generation device 11 (hereinafter, referred to as a first power generation device), the amount of power generation varies due to the influence of solar radiation.
  • / DC converter 12 charges storage battery 13 intermittently.
  • the battery voltage gradually increases while repeating the increase / decrease, and the control unit 4 determines that charging is in progress by capturing this behavior. And if the control part 4 judges that the storage battery 13 is charged, even if it is not charged to full charge, it will perform control which raises the supply amount to load.
  • two distribution lines 32 are wired from the power supply control device 1 to each dwelling unit 20, and one of the two distribution lines 32 is connected to a load whose power consumption is greater than the reference level, and the two distribution lines 32 are provided. It is assumed that a load whose power consumption is equal to or lower than a reference level is connected to the other. In addition, it is assumed that three control modes M1, M2, and M3 are set in the storage unit 5 as control modes.
  • the control mode M1 is a mode in which all the switches 2 are turned on
  • the control mode M2 is a mode in which all the switches 2 are turned off.
  • the switch 2 corresponding to the distribution line 32 connected to the load whose power consumption is lower than the reference level is turned on, and the switch 2 corresponding to the distribution line 32 connected to the relatively large load is turned on.
  • a first threshold value V1 for example, 42V
  • a threshold value V10 for example, 50V
  • the control unit 4 selects the control mode M1 to switch on all the switches 2 and supplies power to the loads in each dwelling unit 20.
  • step S4 the control unit 4 determines that the remaining amount of power stored in the storage battery 13 has decreased to a medium level, selects the control mode M3, and consumes a relatively large amount of power. Power supply to the load is stopped, and power supply is continued to a load with relatively low power consumption.
  • step S5 the control unit 4 determines that the remaining power of the storage battery 13 is a predetermined value. Therefore, the control mode M2 is selected, all the switches 2 are turned off, and the supply amount to the load is reduced.
  • the control unit 4 periodically takes in the battery voltage measured by the measurement unit 3, and continuously changes a predetermined number of times (for example, 10 times) or more so that the change width from the previous battery voltage is within the predetermined allowable range dV1. If not, the control unit 4 determines that charging is in progress, switches to the control mode M3, and starts power feeding to a load with relatively low power consumption (step S6).
  • the controller 4 satisfies the condition that the change width from the previous battery voltage does not fall within the predetermined allowable range dV1 continuously for a predetermined number of times or more, and any battery voltage is equal to or higher than the threshold value V10. For example, it may be determined that charging is in progress.
  • the control unit 4 Since the load being fed in the control mode M3 is a load whose power consumption is below the reference level, it is highly possible that the amount of power generation exceeds the demand power of the load being fed, and if the amount of power generation exceeds the demand power It is estimated that the storage battery 13 is charged and eventually becomes fully charged.
  • the control unit 4 detects that the storage battery 13 is fully charged, the control unit 4 switches to the control mode M1, turns on all the switches 2, and supplies power to the load (step S7). .
  • the determination as to whether or not the storage battery 13 is fully charged may be made by any of the methods described with reference to FIGS. 3 to 5, and the description thereof is omitted.
  • control unit 4 adjusts the supply amount to the load in accordance with the remaining amount of electricity stored.
  • the state of supplying power only to a load with relatively small power consumption and the state of supplying power to all loads are switched, and fine control is possible according to the remaining amount of stored electricity.
  • control unit 4 may perform control to increase the supply amount to the load if the power generation amount of the power generation device is large when it is determined that charging is being performed in the state switched to the control mode M2.
  • the amount of power generated by the solar power generation device 11 varies depending on the amount of solar radiation, but if a large amount of power is obtained, the amount of power generated is likely to exceed the amount supplied to the load. If the control for increasing the supply amount to the load is performed after the battery is fully charged, the storage battery 13 cannot be charged with the amount exceeding the supply amount to the load, and the power generation amount is effectively used. It may not be possible.
  • the control unit 4 determines that the storage battery 13 is being charged, the power generation amount of the solar power generation device 11 is more than the reference level by comparing the rising speed of the battery voltage of the storage battery 13 with the reference value. Is also larger or smaller. If the rate of increase in battery voltage during charging of the storage battery 13 is greater than the reference value, the control unit 4 determines that the amount of power generated by the solar power generation device 11 is greater than the reference level, and supplies the load to the load. Control to increase the amount.
  • the operation of the control unit 4 will be described with reference to the state transition diagram of FIG.
  • the control unit 4 selects the control mode M1 to switch on all the switches 2 and supplies power to the loads in each dwelling unit 20.
  • the control unit 4 determines that the remaining amount of power stored in the storage battery 13 has decreased, selects the control mode M2, and sets all the switches. 2 is turned off, and control to lower the supply amount to the load is performed.
  • the control unit 4 indicates that the remaining power of the storage battery 13 has decreased below a predetermined value. Therefore, the control mode M2 may be selected and all the switches 2 may be switched off.
  • the control unit 4 periodically takes in the battery voltage measured by the measurement unit 3 and performs a process of determining the amount of power generation when it is determined that the storage battery 13 is being charged.
  • the control unit 4 approximates the relationship between the battery voltage and the time of the storage battery 13 with a linear expression in a state where it is determined that the battery is being charged, and the inclination (battery voltage increase rate) a is a predetermined reference value (for example, If it is greater than 1), it is determined that the amount of power generation is greater than the reference level.
  • the control unit 4 switches the control mode to the mode M1, starts power feeding to the load (step S8 in FIG. 7), and performs control to increase the supply amount to the load.
  • control unit 4 does not perform control to increase the amount of power supplied to the load, and then the storage battery 13 is fully charged.
  • control for increasing the supply amount to the load may be performed.
  • control unit 4 may change the supply amount to the load in accordance with the amount of power generation. For example, when the slope a at which the battery voltage increases is equal to or less than a predetermined threshold, the control unit 4 turns on only the switch 2 corresponding to the distribution line 32 to which a load with relatively low power consumption is connected, and then the charging proceeds. And turn on all switches. On the other hand, when the slope a at which the battery voltage increases is larger than the threshold value, the control unit 4 turns on all the switches and starts supplying power to all the loads.
  • the control unit 4 can adjust the power generation amount.
  • the control unit 4 determines that the power generation amount of the first power generation device is lower than the fifth threshold value, the second power generation device that is stopped is operated, and the storage battery 13 is quickly activated. You may charge.
  • the control part 4 should just increase the electric power generation amount of a 2nd electric power generating apparatus, when it judges that the electric power generation amount of a 1st electric power generating apparatus is lower than a 5th threshold value, and can charge the storage battery 13 rapidly. .
  • step S1 of FIG. 2 when the battery voltage becomes less than the first threshold value V1 (step S1 of FIG. 2), the control unit 4 determines that the remaining amount of electricity stored in the storage battery 13 has decreased, Although the control mode is switched to the mode M2, a decrease in the remaining amount of power storage may be determined by another method. A determination operation by another method will be described with reference to FIG.
  • the control unit 4 periodically captures the battery voltage measured by the measurement unit 3 and the power consumption at each load, and determines whether or not the storage battery 13 has been fully charged by any of the methods described above. When the control unit 4 determines that the storage battery 13 has been fully charged, the total of the power consumption and loss measured by the measurement unit 3 from the rated capacity (capacity at full charge) of the storage battery 13 (power supplied to the load) ) Is subtracted to estimate the current remaining charge. When the battery voltage of the storage battery 13 is lower than the first threshold value or the supply power from the full charge exceeds the predetermined fourth threshold value, the control unit 4 determines that the remaining power storage amount is lower than the predetermined value, and performs control.
  • the mode is switched to mode M2, and all the switches 2 are turned off (step S9 in FIG. 8).
  • the rated capacity of the storage battery 13 is 10 kWh
  • the fourth threshold is set to 5 kWh, the discharge depth does not become 50% or less, and the discharge depth can be reliably protected.
  • the control unit 4 determines that the remaining amount of power storage has sufficiently recovered, switches the control mode to mode M1, and turns on all the switches 2. Electric power is supplied to the load (step S10 in FIG. 8).
  • a predetermined threshold for example, 50 V
  • the power supply control device 1 of this embodiment includes the control unit 4.
  • the control unit 4 stores power generated by the solar power generation device 11 (power generation device) in the storage battery 13 and controls power supply to the load from the distributed power supply 10 that supplies the power stored in the storage battery 13 to the outside. To do.
  • the control unit 4 determines that the remaining amount of electricity stored in the storage battery 13 has fallen below a predetermined value, and performs control to reduce the supply amount to the load.
  • the control unit 4 does not determine that the increase in the battery voltage of the storage battery 13 due to the control for reducing the supply amount to the load is an increase in the remaining amount of power storage, but continues the control to reduce the supply amount to the load. It is characterized by being configured.
  • control unit 4 does not determine that the decrease in the battery voltage due to the control for reducing the load is an increase in the remaining amount of power storage, but continues the control for reducing the supply amount to the load. Deterioration of the storage battery 13 due to overdischarge can be suppressed while power feeding is stabilized.
  • the control unit 4 performs control to increase the supply amount to the load when the storage battery 13 is charged until the storage battery 13 is fully charged in a state of performing the control to decrease the supply amount to the load. It is also preferable to be configured. When the remaining amount of electricity stored in the storage battery 13 falls below the first threshold value, the control to reduce the supply amount to the load is continued until the storage battery 13 is fully charged, so the storage battery 13 is quickly charged to full charge. That is, the deterioration of the storage battery 13 is suppressed.
  • the control unit 4 is charged until the storage battery 13 is fully charged when the battery voltage of the storage battery 13 is equal to or greater than the second threshold and the change width of the battery voltage is equal to or less than a predetermined allowable range. It is also preferably configured to determine. Compared with the case where the control unit 4 determines full charge only from the battery voltage of the storage battery 13, it can determine full charge more accurately.
  • the control unit 4 determines that the storage battery 13 is charged until the battery 13 is fully charged when the state in which the battery voltage of the storage battery 13 is equal to or greater than the third threshold value indicating the fully charged state continues for a predetermined time or longer. It is also preferable to be configured. Compared to the case where the controller 4 determines full charge only from the result of comparing the battery voltage of the storage battery 13 with the threshold value, the full charge can be determined more accurately by a simple method.
  • the control unit 4 is configured to perform control to determine that charging is in progress because the battery voltage of the storage battery 13 exceeds a predetermined allowable range and repeats increase / decrease, and to increase the supply amount to the load. It is also preferable. If the storage battery 13 is being charged, there is a high possibility that the storage battery 13 will be fully charged after that, and if the control unit 4 determines that charging is in progress, the control unit 4 performs control to increase the supply amount to the load. The supply amount can be increased.
  • the control unit 4 determines that charging is in progress because the battery voltage of the storage battery 13 repeatedly increases and decreases beyond a predetermined allowable range. Then, the control unit 4 is configured to perform control to increase the supply amount to the load if the rising speed at which the battery voltage of the storage battery 13 rises is greater than a predetermined reference value in a state where it is determined that charging is in progress. It is also preferable. If the rate of increase of the battery voltage during charging is greater than the reference value, the power generation amount of the power generation device is large, and even if the supply amount to the load is increased, it is considered that the storage battery 13 is charged to full charge. When the control unit 4 determines that the battery voltage increase rate is larger than the reference value during charging of the storage battery 13, the control unit 4 performs control to increase the supply amount to the load, so that the supply amount to the load is increased at an earlier timing. Can do.
  • the control unit 4 reduces the battery voltage due to the control to increase the supply amount to the load. It is also preferable that the control for increasing the supply amount to the load is continued without determining.
  • the control unit 4 does not determine that the battery voltage has decreased as a result of performing control to increase the supply amount to the load, but the control unit 4 does not determine that the remaining amount of power storage has decreased, and continues control to increase the supply amount to the load. Therefore, the power supply from the storage battery can be stabilized.
  • control unit 4 may be configured to perform control to reduce the supply amount to the load when the supply amount supplied to the load from the fully charged state of the storage battery 13 exceeds the fourth threshold value.
  • the control part 4 restrict
  • the power generation device includes a first power generation device (solar power generation device 11) that generates natural energy, and a second power generation device whose power generation amount can be adjusted by the control unit 4, and the first power generation device and
  • the control unit 4 increases the power generation amount of the second power generation device when the power generation amount of the first power generation device is lower than the fifth threshold value. It is also preferable to be configured as such.
  • the control unit 4 can quickly charge the storage battery 13 by increasing the power generation amount of the second power generation device.
  • control unit 4 is also preferably configured to adjust the amount of supply to the load in accordance with the remaining amount of power stored in the storage battery 13. It can be finely controlled according to.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

Selon la présente invention, une source d'énergie distribuée stocke de l'énergie produite par un dispositif de production d'énergie solaire dans un accumulateur et fournit l'énergie stockée dans l'accumulateur à l'extérieur. Une unité de commande d'un dispositif de commande d'alimentation électrique commande la fourniture d'énergie de la source d'énergie distribuée aux charges présentes dans un logement. Quand la tension de batterie de l'accumulateur devient inférieure à une première valeur seuil, l'unité de commande détermine que l'état de charge de l'accumulateur est devenu inférieur à une valeur prédéterminée et effectue une commande de réduction de la quantité fournie aux charges. L'unité de commande n'attribue pas à une augmentation de l'état de charge l'élévation de la tension de batterie de l'accumulateur causée par la commande de réduction de la quantité fournie aux charges, et continue la commande de réduction de la quantité fournie aux charges.
PCT/JP2013/004590 2013-07-29 2013-07-29 Dispositif de commande d'alimentation électrique Ceased WO2015015527A1 (fr)

Priority Applications (2)

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JP2015529215A JPWO2015015527A1 (ja) 2013-07-29 2013-07-29 給電制御装置
PCT/JP2013/004590 WO2015015527A1 (fr) 2013-07-29 2013-07-29 Dispositif de commande d'alimentation électrique

Applications Claiming Priority (1)

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PCT/JP2013/004590 WO2015015527A1 (fr) 2013-07-29 2013-07-29 Dispositif de commande d'alimentation électrique

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WO2015015527A1 true WO2015015527A1 (fr) 2015-02-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380467A (zh) * 2019-06-26 2019-10-25 合山市华美新能源科技有限公司 太阳能led路灯的蓄电池供电控制方法及其系统
JP2024024930A (ja) * 2022-08-10 2024-02-26 大阪瓦斯株式会社 電力供給システム

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JP3210278B2 (ja) * 1996-10-02 2001-09-17 キヤノン株式会社 充電装置および充電方法
JP2000341875A (ja) * 1999-05-24 2000-12-08 Kyocera Corp 太陽光発電装置
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JPS57164970U (fr) * 1981-04-14 1982-10-18
JPS58103830A (ja) * 1981-12-10 1983-06-21 松下電工株式会社 蓄電池放電制御回路
JPH0525952U (ja) * 1991-09-13 1993-04-02 松下電工株式会社 太陽電池応用機器
JPH06276696A (ja) * 1993-01-19 1994-09-30 Sanyo Electric Co Ltd 二次電池の過放電保護回路
JPH10126970A (ja) * 1996-10-16 1998-05-15 Fujikura Ltd 電源電圧監視回路
JP2002204532A (ja) * 2001-01-05 2002-07-19 Seiko Instruments Inc バッテリー状態監視回路およびバッテリー装置
JP2008131710A (ja) * 2006-11-20 2008-06-05 Nippon Telegr & Teleph Corp <Ntt> 電源システム、電源システムの制御方法、電源システムの制御方法を実行するためのプログラムおよび電源システムの制御方法を実行するためのプログラムを記録した記録媒体
JP2010288419A (ja) * 2009-06-15 2010-12-24 Nippon Telegr & Teleph Corp <Ntt> 放電制御装置および蓄電池システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380467A (zh) * 2019-06-26 2019-10-25 合山市华美新能源科技有限公司 太阳能led路灯的蓄电池供电控制方法及其系统
JP2024024930A (ja) * 2022-08-10 2024-02-26 大阪瓦斯株式会社 電力供給システム

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