CN108732425A - A kind of low-voltage distribution network supply line resistance value method of real-time - Google Patents
A kind of low-voltage distribution network supply line resistance value method of real-time Download PDFInfo
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- CN108732425A CN108732425A CN201810740280.8A CN201810740280A CN108732425A CN 108732425 A CN108732425 A CN 108732425A CN 201810740280 A CN201810740280 A CN 201810740280A CN 108732425 A CN108732425 A CN 108732425A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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Abstract
The present invention relates to a kind of low-voltage distribution network supply line resistance value method of real-time, acquire voltage, the current values of each endpoint ammeter of low-voltage distribution network supply line in real time using intelligent electric meter data acquisition function, to obtain each end-point voltage of low-voltage distribution network supply line, current value, each section of low-voltage distribution network supply line resistance value is calculated, low-voltage distribution network supply line resistance value is monitored in real time to realize.The present invention need not obtain the voltage of each branch point of low-voltage distribution network supply line, current data, monitoring device need not be increased newly on low-voltage distribution network, low-voltage distribution network running state real-time monitoring is can be applied to, the blank in terms of low-voltage distribution network running state real-time monitoring is filled up.
Description
Technical field
The present invention relates to low-voltage distribution network supply line resistance measurement field, especially a kind of low-voltage distribution network supply line electricity
Resistance value method of real-time.
Background technology
Low-voltage distribution network supply line resistance change situation can reflect whether low-voltage distribution network supply line operating status is good
It is good, it is an important physical parameter of low-voltage distribution network supply line, size directly influences line loss size, the electricity being induced by it
Drop of pressure directly affects terminal temperature difference quality of voltage, and a large amount of low-voltage distribution network supply line ontology failures are drawn greatly very much by its resistance value
It plays conducting wire and its connection equipment heating is burnt, the normal production and living of benefit and user to influence power supply enterprise, therefore is real
Now to low-voltage distribution network supply line resistance value, monitoring is of great significance in real time.
Invention content
In view of this, the purpose of the present invention is to propose to a kind of low-voltage distribution network supply line resistance value method of real-time, no
Voltage, the current data for needing each branch point of acquisition low-voltage distribution network supply line need not increase monitoring newly on low-voltage distribution network and set
It is standby, low-voltage distribution network running state real-time monitoring is can be applied to, the blank in terms of low-voltage distribution network running state real-time monitoring is filled up.
The present invention is realized using following scheme：A kind of low-voltage distribution network supply line resistance value method of real-time, feature
It is：Include the following steps：
Step S1：Voltage, the current value of each endpoint of acquisition low-voltage distribution network supply line in real time；
Step S2：The real time resistance value of each section of low-voltage distribution network supply line is obtained using the numerical computations of step S1 acquisitions.
Further, step S1 specifically includes following steps：
Step S11：Low-voltage distribution network supply line head end ammeter and low is acquired in real time using ammeter electricity consumption data acquisition function
Voltage, the current value of the press-fitting net supply line all electric supply meters in end, the meter voltage value acquired indicate where ammeter
Locate low-voltage distribution network supply line voltage value, the ammeter current value acquired indicates at ammeter place in low-voltage distribution network supply line
The current value of circulation；
Step S12：Choose several groups it is disproportionate between the collected numerical value of different time institute, each group numerical value.
Further, step S2 specifically includes following steps：
Step S21：Low-voltage distribution network supply line head end is calculated according to the voltage value of step S1 acquisitions and terminal voltage is poor
Value；
Step S22：The current value of every section of low-voltage distribution network supply line circulation is calculated according to the current value of step S1 acquisitions；
Step S23：The data of gained are calculated according to step S21 and step S22, and establishes matched with each section of low pressure according to the following formula
Net the multi head linear equation group that supply line's resistance value is unknown number：
UHead end-UEnd=∑ InRn；
In formula, UHead endIndicate low-voltage distribution network supply line head end voltage, UEndIndicate low-voltage distribution network supply line terminal voltage,
∑InRnIndicate the sum of the voltage landing that each section of low-voltage distribution network supply line generates, InIndicate what low-voltage distribution network supply line was flowed through
Current value, RnIndicate the resistance value of each section of low-voltage distribution network supply line；
Step S24：The multi head linear equation group of step S23 is asked to obtain each section of low-voltage supply line resistance value Rn。
The present invention acquires each endpoint ammeter of low-voltage distribution network supply line in real time using intelligent electric meter data acquisition function
Voltage, current values are calculated each section of low pressure and match to obtain each end-point voltage of low-voltage distribution network supply line, current value
Supply line's resistance value is netted, low-voltage distribution network supply line resistance value is monitored in real time to realize.
Compared with prior art, the present invention has following advantageous effect：The present invention need not obtain low-voltage distribution network supply line
The voltage of each branch point, current data need not increase monitoring device newly on low-voltage distribution network, can be applied to low-voltage distribution network operation
Status real time monitor fills up the blank in terms of low-voltage distribution network running state real-time monitoring.
Description of the drawings
Fig. 1 is the single-phase schematic diagram of low-voltage distribution network supply line in the embodiment of the present invention.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and embodiments.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As shown in Figure 1, present embodiments providing a kind of low-voltage distribution network supply line resistance value method of real-time, feature
It is：Include the following steps：
Step S1：Voltage, the current value of each endpoint of acquisition low-voltage distribution network supply line in real time；
Step S2：The real time resistance value of each section of low-voltage distribution network supply line is obtained using the numerical computations of step S1 acquisitions.
In the present embodiment, step S1 specifically includes following steps：
Step S11：Low-voltage distribution network supply line head end ammeter and low is acquired in real time using ammeter electricity consumption data acquisition function
Voltage, the current value of the press-fitting net supply line all electric supply meters in end, the meter voltage value acquired indicate where ammeter
Locate low-voltage distribution network supply line voltage value, the ammeter current value acquired indicates at ammeter place in low-voltage distribution network supply line
The current value of circulation；
Step S12：Choose several groups it is disproportionate between the collected numerical value of different time institute, each group numerical value.
In the present embodiment, step S2 specifically includes following steps：
Step S21：Low-voltage distribution network supply line head end is calculated according to the voltage value of step S1 acquisitions and terminal voltage is poor
Value；
Step S22：The current value of every section of low-voltage distribution network supply line circulation is calculated according to the current value of step S1 acquisitions；
Step S23：The data of gained are calculated according to step S21 and step S22, and establishes matched with each section of low pressure according to the following formula
Net the multi head linear equation group that supply line's resistance value is unknown number：
UHead end-UEnd=∑ InRn；
In formula, UHead endIndicate low-voltage distribution network supply line head end voltage, UEndIndicate low-voltage distribution network supply line terminal voltage,
∑InRnIndicate the sum of the voltage landing that each section of low-voltage distribution network supply line generates, InIndicate what low-voltage distribution network supply line was flowed through
Current value, RnIndicate the resistance value of each section of low-voltage distribution network supply line；
Step S24：The multi head linear equation group of step S23 is asked to obtain each section of low-voltage supply line resistance value Rn。
The present embodiment acquires each endpoint electricity of low-voltage distribution network supply line in real time using intelligent electric meter data acquisition function
Each section of low pressure is calculated to obtain each end-point voltage of low-voltage distribution network supply line, current value in the voltage of table, current values
Supplying power allocation line resistance value monitors low-voltage distribution network supply line resistance value to realize in real time.
As shown in Figure 1, the present embodiment specifically includes following steps by taking low-voltage distribution network supply line uniline as an example：
1, voltage, the current value of each endpoint of low-voltage distribution network supply line are acquired in real time；
(1) ammeter electricity consumption data acquisition function is utilized to acquire low-voltage distribution network supply line head end ammeter and low-voltage distribution network in real time
Voltage, the current value of all electric supply meters in supply line end, the meter voltage value acquired indicate low pressure at ammeter place
Supplying power allocation line voltage value, what the ammeter current value acquired indicated to circulate in low-voltage distribution network supply line at where ammeter
The head end a terminal voltage values of low-voltage distribution network supply line shown in Fig. 1 are denoted as U by current valuea, i.e., from low-voltage distribution network supply line head
The voltage value that end ammeter is acquired, U is denoted as by the end of low-voltage distribution network supply line shown in Fig. 1 f terminal voltage valuesf, i.e., from low pressure
The voltage value that supplying power allocation line end f end subscriber ammeters are acquired, by the ends the f of low-voltage supply line end shown in Fig. 1, the ends g,
The current value that low-voltage distribution network supply line is flowed through at where the ends h, the ends i, the ends j, the ends k, the ends l, the ends m, the ends n ammeter is denoted as I respectivelyf、
Ig、Ih、Ii、Ij、Ik、Il、Im、In, both from the current value of each corresponding endpoint ammeter acquisition；
(2) several groups of selection is disproportionate between the collected numerical value of different time institute, each group numerical value.
2, utilize acquired data that each section of low-voltage distribution network supply line real time resistance value is calculated.To calculate in Fig. 1
Ab sections of the low-voltage distribution network supply line ends head end a to the end ends f, bc sections, ce sections, for df sections of resistance values：
(1), low-voltage distribution network supply line head end and terminal voltage difference are calculated according to institute's collection voltages value, in Fig. 1
The shown low-voltage distribution network supply line ends head end a to end f terminal voltages difference had both been Ua-Uf；
(2), the current value that the circulation of every section of low-voltage distribution network supply line is calculated according to acquired current value, will pass through Fig. 1
Shown in the current values of ab sections, bc sections, cd sections low-voltage distribution network supply lines be denoted as I respectivelyab、Ibc、Icd, there is Iab=If+Ig+Ih+
Ii+Ij+Ik+Il+Im+In, Ibc=If+Ig+Ih+Ii+Ij+Ik, Icd=If+Ig+Ih, pass through the electricity of df sections of low-voltage distribution network supply lines
Flow valuve is Idf=If；
(3), according to institute's value according to formula UHead end-UEnd=∑ InRnIt establishes with each section of low-voltage distribution network supply line resistance
Value is the multi head linear equation group of unknown number, by ab section in Fig. 1, bc sections, ce sections, df sections of low-voltage distribution network supply line resistance values divide
R is not denoted as itab、Rbc、Rcd、Rdf, equation U can be obtained according to formulaa-Uf=IabRab+IbcRbc+IcdRcd+IdfRdf, choose 4 groups of differences
The collected voltage of time institute, current values, and it is disproportionate between each group numerical value, R can be able to by substituting into above formulaab、Rbc、Rcd、RdfFor
Four set of equations of unknown number at quaternary linear function group；
(4), it solves above-mentioned quaternary linear function group and obtains each section of low-voltage supply line resistance value Rab、Rbc、Rcd、RdfNumerical value；
Similarly, other each section of low-voltage distribution network supply line real time resistance value can be calculated.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification should all belong to the covering scope of the present invention.
Claims (3)
1. a kind of low-voltage distribution network supply line resistance value method of real-time, it is characterised in that：Include the following steps：
Step S1：Voltage, the current value of each endpoint of acquisition low-voltage distribution network supply line in real time；
Step S2：The real time resistance value of each section of low-voltage distribution network supply line is obtained using the numerical computations of step S1 acquisitions.
2. a kind of low-voltage distribution network supply line resistance value method of real-time according to claim 1, it is characterised in that：Step
Rapid S1 specifically includes following steps：
Step S11：Low-voltage distribution network supply line head end ammeter is acquired in real time using ammeter electricity consumption data acquisition function and low pressure is matched
Voltage, the current value of supply line's all electric supply meters in end are netted, the meter voltage value acquired indicates low at ammeter place
Press-fitting net supply line voltage value, the ammeter current value acquired indicate to circulate in low-voltage distribution network supply line at ammeter place
Current value；
Step S12：Choose several groups it is disproportionate between the collected numerical value of different time institute, each group numerical value.
3. a kind of low-voltage distribution network supply line resistance value method of real-time according to claim 1, it is characterised in that：Step
Rapid S2 specifically includes following steps：
Step S21：Low-voltage distribution network supply line head end and terminal voltage difference are calculated according to the voltage value of step S1 acquisitions；
Step S22：The current value of every section of low-voltage distribution network supply line circulation is calculated according to the current value of step S1 acquisitions；
Step S23：The data of gained are calculated according to step S21 and step S22, and establishes supplied with each section of low-voltage distribution network according to the following formula
Electric line resistance value is the multi head linear equation group of unknown number：
UHead end-UEnd=∑ InRn；
In formula, UHead endIndicate low-voltage distribution network supply line head end voltage, UEndIndicate low-voltage distribution network supply line terminal voltage, ∑
InRnIndicate the sum of the voltage landing that each section of low-voltage distribution network supply line generates, InIndicate the electricity that low-voltage distribution network supply line is flowed through
Flow valuve, RnIndicate the resistance value of each section of low-voltage distribution network supply line；
Step S24：The multi head linear equation group of step S23 is asked to obtain each section of low-voltage supply line resistance value Rn。
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| CN201810740280.8A CN108732425B (en) | 2018-07-07 | 2018-07-07 | A real-time monitoring method for resistance value of power supply lines in low-voltage distribution network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610371A (en) * | 2020-05-14 | 2020-09-01 | 国网河北省电力有限公司电力科学研究院 | A Real-time Calculation Method of Station Impedance |
| CN114184981A (en) * | 2021-12-10 | 2022-03-15 | 国网福建省电力有限公司南平供电公司 | Low-voltage electric leakage positioning equipment and offline electric leakage evaluation method |
| CN118470858A (en) * | 2024-05-23 | 2024-08-09 | 中国铁塔股份有限公司云南省分公司 | Power conversion charging device for primary-secondary table type station |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100301883A1 (en) * | 2007-12-19 | 2010-12-02 | Erickson Bruce Meyers | Method and Apparatus for Detecting a Fault in a Neutral Return Line of an Electrical Network |
| CN203414556U (en) * | 2013-08-08 | 2014-01-29 | 华北电力大学（保定） | Multifunctional low-voltage line measuring instrument |
| CN105301361A (en) * | 2015-09-16 | 2016-02-03 | 国网辽宁省电力有限公司锦州供电公司 | Transmission line insulation resistance measurement method under strong interference |
| CN106054023A (en) * | 2016-06-30 | 2016-10-26 | 国网江西省电力公司检修分公司 | Method for estimating system impedances at two sides in single-ended range finding of power transmission line |
| CN106339811A (en) * | 2016-08-26 | 2017-01-18 | 中国电力科学研究院 | Low-voltage distribution network precise line loss analysis method |
-
2018
- 2018-07-07 CN CN201810740280.8A patent/CN108732425B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100301883A1 (en) * | 2007-12-19 | 2010-12-02 | Erickson Bruce Meyers | Method and Apparatus for Detecting a Fault in a Neutral Return Line of an Electrical Network |
| CN203414556U (en) * | 2013-08-08 | 2014-01-29 | 华北电力大学（保定） | Multifunctional low-voltage line measuring instrument |
| CN105301361A (en) * | 2015-09-16 | 2016-02-03 | 国网辽宁省电力有限公司锦州供电公司 | Transmission line insulation resistance measurement method under strong interference |
| CN106054023A (en) * | 2016-06-30 | 2016-10-26 | 国网江西省电力公司检修分公司 | Method for estimating system impedances at two sides in single-ended range finding of power transmission line |
| CN106339811A (en) * | 2016-08-26 | 2017-01-18 | 中国电力科学研究院 | Low-voltage distribution network precise line loss analysis method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610371A (en) * | 2020-05-14 | 2020-09-01 | 国网河北省电力有限公司电力科学研究院 | A Real-time Calculation Method of Station Impedance |
| CN114184981A (en) * | 2021-12-10 | 2022-03-15 | 国网福建省电力有限公司南平供电公司 | Low-voltage electric leakage positioning equipment and offline electric leakage evaluation method |
| CN114184981B (en) * | 2021-12-10 | 2023-12-22 | 国网福建省电力有限公司南平供电公司 | Low-voltage leakage positioning equipment and offline leakage assessment method |
| CN118470858A (en) * | 2024-05-23 | 2024-08-09 | 中国铁塔股份有限公司云南省分公司 | Power conversion charging device for primary-secondary table type station |
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| CN108732425B (en) | 2020-10-13 |
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