CN111049157A - Distribution network transformer reactive compensation condition analysis method - Google Patents
Distribution network transformer reactive compensation condition analysis method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y02E40/30—Reactive power compensation
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Abstract
The invention provides a distribution network transformer reactive compensation condition analysis method, which comprises the following steps: s1, data information is collected from a distribution network GIS system, an asset management system, a marketing system and a metering system respectively; s2, recombining the acquired data information, and forming a new database by the recombined data; s3, analyzing reactive compensation conditions based on the information of the new database; and S4, generating a distribution network transformer reactive compensation condition analysis report. The invention provides an effective solution for the service pain point of the original whole distribution network, which can not be managed and monitored for the reactive compensation condition of the distribution network transformer, and promotes the technical monitoring and management level of the whole distribution network on the distribution network transformer.
Description
Technical Field
The invention relates to the technical field of distribution network transformer reactive compensation, in particular to a distribution network transformer reactive compensation condition analysis method.
Background
The distribution network transformer is used as a key link in the whole distribution network, and plays a vital role in planning, construction and operation maintenance of the distribution network. At present, the technical management and monitoring of the distribution network transformer are almost blank in domestic technology, and some advanced areas can simply and intensively monitor and control the operation condition of the distribution network transformer, but the monitoring and control force only stays at the initial monitoring level of current, voltage and the like, so that the deep monitoring and intelligent analysis of the reactive power compensation conditions of the distribution network transformer, such as the reactive power reverse delivery condition, the qualification of power factor and the like are difficult to realize.
However, the safe and stable operation and the good and bad source of the voltage quality of the whole distribution network are that tens of millions of distribution network transformers are distributed in each region, and the electricity quality and the operation stability of the distribution network are directly affected by the reactive power reverse transmission or unqualified power factor of the distribution network transformers, so that the monitoring and analysis of the distribution network transformers cannot only stay on simple values of voltage, current, electricity degree and the like.
In summary, it is necessary to provide a method capable of performing centralized management and control and analyzing reactive compensation conditions on distribution network transformers.
Disclosure of Invention
In order to overcome the defect that the reactive compensation conditions of distribution network transformers, such as reactive power reverse feeding or unqualified power factors, cannot be monitored and analyzed in the prior art, the invention provides the method for analyzing the reactive compensation conditions of the distribution network transformers, and the operation maintenance and management level of the whole distribution network in distribution network transformer equipment is improved.
The present invention aims to solve the above technical problem at least to some extent.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a distribution network transformer reactive compensation condition analysis method comprises the following steps:
s1, data information is collected from a distribution network GIS system, an asset management system, a marketing system and a metering system respectively;
s2, recombining the acquired data information, and forming a new database by the recombined data;
s3, analyzing reactive compensation conditions based on the information of the new database;
s4, generating a distribution network transformer reactive compensation condition analysis report, comprising: the method comprises a distribution network transformer reactive compensation condition report list, a distribution network transformer reactive power reverse transmission condition report list and a distribution network transformer power factor unqualified condition report list.
Preferably, the process of collecting data information from the distribution network GIS system in step S1 is as follows: the method comprises the steps that SVG file information is obtained from a graphic file of a distribution network GIS system through a data transmission channel, the SVG file information is converted through a graphic model to form an XML file, and distribution network topological relation information is obtained according to topological conditions of a slave substation, a medium-voltage line and a distribution network transformer;
the process of collecting data information from the asset management system is as follows: by utilizing a data transmission channel, taking a distribution network transformer as a key field, enabling the distribution network transformer data to be independently formed into a group, and obtaining the distribution network transformer equipment ID, the distribution network transformer equipment name, the distribution network transformer subordinate management unit, the distribution network transformer subordinate associated distribution network line and transformer substation information by accessing the key fields of the distribution network transformer equipment ID, the distribution network transformer equipment name, the distribution network transformer subordinate management unit, the distribution network transformer subordinate associated distribution network line and the transformer substation;
the process of collecting data information from the marketing system is as follows: by utilizing a data transmission channel, taking a distribution network transformer as a key field, enabling data of the distribution network transformers to form a group independently, and accessing the key fields of the user ID, the user type, the subordinate classification and the user total number of the subordinate distribution network transformers to obtain the user ID, the user type, the subordinate classification and the user total number information of the subordinate distribution network transformers;
the process of collecting data information from the metering system is as follows: the collected information flows back to a metering system from a metering general table site of a source site distribution network transformer in a wireless encryption transmission mode, and comprises forward reactive numerical values, reverse reactive numerical values, forward active numerical values, reverse active numerical values, voltage and current information.
Preferably, the process of data information reassembly in step S2 is as follows:
s201, taking a distribution network transformer as a key field, recording different distribution network transformers into a group, matching acquired data information through a distribution network transformer equipment ID, acquiring a distribution network topological relation, a user ID, a GIS number, a user total number and transformer substation information, and associating;
s202, defining the ID of the null distribution network transformer equipment as 'incomplete data', and associating a secondary key field 'distribution network transformer name' with data information acquired by a marketing system;
s203, judging whether the association of the secondary key field 'distribution network transformer name' and the data information collected by the marketing system is successful, if so, returning to the step S201; otherwise, judging that the secondary key field 'distribution network transformer name' is error data;
and S204, marking error data and incomplete data. After the error data and the incomplete data are marked and recorded, the error data and the incomplete data are not included in the new database any more, namely, the error data and the data information left after the incomplete data are filtered are recombined.
Preferably, the sign that the association between the secondary key field "name of distribution network transformer" in step 203 and the data information collected by the marketing system is successful is that the association matching state displays "ON".
The data collected by the marketing system comprises the user ID, the user type, the subordinate classification and the user total number information of subordinate distribution network transformers, the names of the corresponding subordinate distribution network transformers are known, the names of the distribution network transformers extracted from the data collected by the marketing system are matched according to characters of a secondary key field distribution network transformer name, and if the names are consistent, the secondary key field distribution network transformer name can correspond to the user ID, the user type, the subordinate classification and the user total number information of the subordinate distribution network transformers consistent with the name collected by the marketing system, so that the successful association of the secondary key field distribution network transformer name and the data information collected by the marketing system is realized.
Preferably, the reactive compensation condition analysis process in step S3 is as follows:
s301, subtracting the collected forward active value at the time t1 from the forward active value at the time t2 to obtain an active total P; subtracting the collected forward reactive value at the time t1 from the forward reactive value at the time t2 to obtain a reactive total Q, and calculating the power factor cos phi of each line;
s302, classifying the power factors cos phi according to the numerical values of the power factors cos phi of all lines;
s303, subtracting the acquired reverse reactive power value at the time t1 from the acquired reverse reactive power value at the time t2 to obtain a reverse reactive power total Qf;
s304, judging whether the total reverse reactive power Qf and the total distribution network transformer user number are both larger than 0, if so, judging that the voltage of the distribution network transformer is normal, otherwise, judging that the distribution network transformer has a reactive power reverse transmission condition;
and S305, classifying the state of the reactive power reverse transmission condition, and analyzing and calibrating the work arrangement of the distribution network transformer.
Preferably, the time t1 stated in S301 represents the second timeiDay 0, time t2 denotes day NoiAt 0 point on day +1, i represents a positive integer. The calculation formula of the power factor cos phi in step 301 is:
wherein the content of the first and second substances,φrepresenting the power factor, P the active total and Q the reactive total.
Preferably, the power factor cos phi classification of step S302 includes:
A.cosφ>=0.95；B.0.95>cosφ>=0.90；C.0.90>cosφ>=0.85；D.0.85>cosφ>=0.80；
when the power factor cos phi calculated in the step S301 satisfies class a or class B, the power factor cos phi is qualified; when the power factor cos phi calculated in step S301 satisfies the class C or D, the power factor cos phi is not qualified.
Preferably, the step S305 of classifying the state of the reactive power transfer condition, and analyzing and calibrating the operation schedule of the distribution network transformer includes:
A1. when the total reverse reactive power Qf is greater than 100, the state of the distribution network transformer reactive power reverse transmission condition is marked as 'needing to be processed';
B1. when the total reverse reactive power Qf meets 0< Qf is less than or equal to 100, the state of the distribution network transformer reactive power reverse transmission condition is marked as 'to be observed'.
The power factor required by the power distribution network must meet the standard specified by the specification to ensure the stable operation of the power distribution network, in order to meet the standard, the power factor of the power distribution network can be improved by some reactive compensation measures, and the power factor cos phi of each calculated line is included in the distribution network transformer reactive compensation condition report list output in the step S4; the distribution network transformer reactive power back-off condition report list comprises the distribution network transformer reactive power back-off specific state judged by the total reverse reactive power Qf and the total distribution network transformer user number, and relates to the collected reverse reactive power at the time t1 and the collected reverse reactive power at the time t 2; the distribution network transformer power factor disqualification report list relates to the judgment of the calculated power factors cos phi of all lines according to the following classification: cosφ>=0.95；B.0.95>cosφ>=0.90；C.0.90>cosφ>=0.85；D.0.85>cosφ>= 0.80; when the power factor cos phi meets the class A or B, the power factor cos phi is qualified; and when the power factor cos phi meets the class C or D, the power factor cos phi is unqualified, and if the power factor cos phi is unqualified, a power factor unqualified condition report list of the unqualified lines of the distribution network transformer is output.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides a distribution network transformer reactive compensation condition analysis method, which is characterized in that a new database is formed after data information collected in a distribution network GIS system, an asset management system, a marketing system and a metering system is recombined, reactive compensation condition analysis is carried out based on the information of the new database, and a distribution network transformer reactive compensation condition analysis report is generated, so that the tedious work with high technical requirements such as manual statistics, field collection, manual analysis and the like is reduced, an effective solution is provided for the service pain point of the original whole distribution network, which can not be managed and monitored in the distribution network transformer reactive compensation condition, and the technical monitoring and management level of the whole distribution network on the distribution network transformer is promoted.
Drawings
Fig. 1 is a schematic block diagram of a distribution network transformer reactive compensation condition analysis method provided by the invention.
Fig. 2 is an implementation flowchart of a distribution network transformer reactive compensation condition analysis method in the embodiment of the invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it will be understood by those skilled in the art that certain well-known illustrations in the drawings may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The schematic block diagram of the distribution network transformer reactive compensation condition analysis method provided by the invention as shown in fig. 1 includes three major parts, including: information acquisition, reactive compensation condition analysis calculation and output application;
the information acquisition comprises the following steps: the method comprises the steps of collecting distribution network topological relation information from a distribution network GIS system, collecting distribution network transformer equipment ID, distribution network transformer equipment name, distribution network transformer subordinate management units, distribution network transformer subordinate associated distribution network lines and transformer substation information from an asset management system, collecting user ID, user type, subordinate classification and user total number information of subordinate distribution network transformers from a marketing system, and collecting forward reactive numerical values, reverse reactive numerical values, forward active numerical values, reverse active numerical values, voltage and current information from a metering system.
The whole information acquisition process does not need manual on-site statistics participation, the complex work with high technical requirements is greatly reduced, the consumption of manpower and material resources is reduced, and the information acquisition has the characteristics of high accuracy, strong real-time performance and high efficiency.
Reactive compensation condition analysis and calculation: the method comprises the steps of calculating after data information is recombined to obtain whether the power factor is qualified or not and whether reactive power reverse transmission exists or not.
Outputting application: and outputting a distribution network transformer reactive compensation condition analysis report.
Referring to an implementation flow chart of the distribution network transformer reactive compensation condition analysis method shown in fig. 2, specific implementation steps are as follows:
s1, data information is collected from a distribution network GIS system, an asset management system, a marketing system and a metering system respectively; the process of collecting data information from the distribution network GIS system comprises the following steps: the method comprises the steps that SVG file information is obtained from a graphic file of a distribution network GIS system through a data transmission channel, the SVG file information is converted through a graphic model to form an XML file, and distribution network topological relation information is obtained according to topological conditions of a slave substation, a medium-voltage line and a distribution network transformer;
the process of collecting data information from the asset management system is as follows: by utilizing a data transmission channel, taking a distribution network transformer as a key field, enabling the distribution network transformer data to be independently formed into a group, and obtaining the distribution network transformer equipment ID, the distribution network transformer equipment name, the distribution network transformer subordinate management unit, the distribution network transformer subordinate associated distribution network line and transformer substation information by accessing the key fields of the distribution network transformer equipment ID, the distribution network transformer equipment name, the distribution network transformer subordinate management unit, the distribution network transformer subordinate associated distribution network line and the transformer substation;
the process of collecting data information from the marketing system is as follows: by utilizing a data transmission channel, taking a distribution network transformer as a key field, enabling data of the distribution network transformers to form a group independently, and accessing the key fields of the user ID, the user type, the subordinate classification and the user total number of the subordinate distribution network transformers to obtain the user ID, the user type, the subordinate classification and the user total number information of the subordinate distribution network transformers;
the process of collecting data information from the metering system is as follows: the collected information flows back to a metering system from a metering general table site of a source site distribution network transformer in a wireless encryption transmission mode, and comprises forward reactive numerical values, reverse reactive numerical values, forward active numerical values, reverse active numerical values, voltage and current information.
S2, recombining the acquired data information, and forming a new database by the recombined data; the process of data information reorganization is as follows:
s201, taking a distribution network transformer as a key field, recording different distribution network transformers into a group, matching acquired data information through a distribution network transformer equipment ID, acquiring a distribution network topological relation, a user ID, a GIS number, a user total number and transformer substation information, and associating;
s202, defining the ID of the null distribution network transformer equipment as 'incomplete data', and associating a secondary key field 'distribution network transformer name' with data information acquired by a marketing system;
s203, judging whether the association of the secondary key field 'distribution network transformer name' and the data information collected by the marketing system is successful, if so, returning to the step S201; otherwise, judging that the secondary key field 'distribution network transformer name' is error data; the sign that the association of the secondary key field 'distribution network transformer name' and the data information collected by the marketing system is successful is that the association matching state displays 'ON';
and S204, marking error data and incomplete data. After the error data and the incomplete data are marked and recorded, the error data and the incomplete data are not included in the new database any more, namely, the error data and the data information left after the incomplete data are filtered are recombined.
S3, analyzing reactive compensation conditions based on the information of the new database;
the reactive compensation condition analysis process comprises the following steps: s301, subtracting the collected forward active value at the 0 point of the previous day from the forward active value at the 0 point of the current day to obtain the active total P; subtracting the collected forward reactive value at the 0 point of the previous day from the forward reactive value at the 0 point of the current day to obtain a reactive total Q, and calculating the power factor cos phi of each line; the power factor cos φ is calculated as:
wherein the content of the first and second substances,φrepresenting the power factor, P the active total and Q the reactive total.
S302, classifying the power factors cos phi according to the numerical values of the power factors cos phi of all lines; the method comprises the following steps:
A.cosφ>=0.95；B.0.95>cosφ>=0.90；C.0.90>cosφ>=0.85；D.0.85>cosφ>=0.80；
when the power factor cos phi calculated in the step S301 satisfies class a or class B, the power factor cos phi is qualified; when the power factor cos phi calculated in step S301 satisfies the class C or D, the power factor cos phi is not qualified.
S303, subtracting the acquired reverse reactive power value at the 0 point in the previous day from the acquired reverse reactive power value at the 0 point in the current day to obtain a reverse reactive power total Qf;
s304, judging whether the total reverse reactive power Qf and the total distribution network transformer user number are both larger than 0, if so, judging that the voltage of the distribution network transformer is normal, otherwise, judging that the distribution network transformer has a reactive power reverse transmission condition;
s305, classifying the state of the reactive power reverse transmission condition, analyzing and calibrating the work arrangement of the distribution network transformer, and the method comprises the following steps:
A1. when the total reverse reactive power Qf is greater than 100, the state of the distribution network transformer reactive power reverse transmission condition is marked as 'needing to be processed';
B1. when the total reverse reactive power Qf meets 0< Qf is less than or equal to 100, the state of the distribution network transformer reactive power reverse transmission condition is marked as 'to be observed'.
And S4, generating a distribution network transformer reactive compensation condition analysis report. The distribution network transformer reactive compensation condition analysis report comprises the following steps: distribution network transformer reactive compensation condition reportThe report list, the report list of the condition that the distribution network transformer has reactive power reverse delivery and the report list of the condition that the power factor of the distribution network transformer is unqualified. The output distribution network transformer reactive compensation condition report list comprises the calculated power factors cos phi of all lines; the distribution network transformer reactive power back-off condition report list comprises the distribution network transformer reactive power back-off specific state judged by the total reverse reactive power Qf and the total distribution network transformer user number, and relates to the collected reverse reactive power at the time t1 and the collected reverse reactive power at the time t 2; the distribution network transformer power factor disqualification report list relates to the judgment of the calculated power factors cos phi of all lines according to the following classification: cosφ>=0.95；B.0.95>cosφ>=0.90；C.0.90>cosφ>=0.85；D.0.85>cosφ>= 0.80; when the power factor cos phi meets the class A or B, the power factor cos phi is qualified; and when the power factor cos phi meets the class C or D, the power factor cos phi is unqualified, and if the power factor cos phi is unqualified, a power factor unqualified condition report list of the unqualified lines of the distribution network transformer is output. The whole process provides an effective solution for the service pain point of the original whole distribution network, which can not be managed and monitored for the reactive compensation condition of the distribution network transformer, and promotes the technical monitoring and management level of the whole distribution network on the distribution network transformer.
The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A distribution network transformer reactive compensation condition analysis method is characterized by comprising the following steps:
s1, data information is collected from a distribution network GIS system, an asset management system, a marketing system and a metering system respectively;
s2, recombining the acquired data information, and forming a new database by the recombined data;
s3, analyzing reactive compensation conditions based on the information of the new database;
s4, generating a distribution network transformer reactive compensation condition analysis report, comprising: the method comprises a distribution network transformer reactive compensation condition report list, a distribution network transformer reactive power reverse transmission condition report list and a distribution network transformer power factor unqualified condition report list.
2. The distribution network transformer reactive compensation situation analysis method according to claim 1, wherein the process of collecting data information from the distribution network GIS system in step S1 is as follows: the method comprises the steps that SVG file information is obtained from a graphic file of a distribution network GIS system through a data transmission channel, the SVG file information is converted through a graphic model to form an XML file, and distribution network topological relation information is obtained according to topological conditions of a slave substation, a medium-voltage line and a distribution network transformer;
the process of collecting data information from the asset management system is as follows: by utilizing a data transmission channel, taking a distribution network transformer as a key field, enabling the distribution network transformer data to be independently formed into a group, and obtaining the distribution network transformer equipment ID, the distribution network transformer equipment name, the distribution network transformer subordinate management unit, the distribution network transformer subordinate associated distribution network line and transformer substation information by accessing the key fields of the distribution network transformer equipment ID, the distribution network transformer equipment name, the distribution network transformer subordinate management unit, the distribution network transformer subordinate associated distribution network line and the transformer substation;
the process of collecting data information from the marketing system is as follows: by utilizing a data transmission channel, taking a distribution network transformer as a key field, enabling data of the distribution network transformers to form a group independently, and accessing the key fields of the user ID, the user type, the subordinate classification and the user total number of the subordinate distribution network transformers to obtain the user ID, the user type, the subordinate classification and the user total number information of the subordinate distribution network transformers;
the process of collecting data information from the metering system is as follows: the collected information flows back to a metering system from a metering general table site of a source site distribution network transformer in a wireless encryption transmission mode, and comprises forward reactive numerical values, reverse reactive numerical values, forward active numerical values, reverse active numerical values, voltage and current information.
3. The distribution network transformer reactive compensation situation analysis method according to claim 2, wherein the data information reorganization process of step S2 is as follows:
s201, taking a distribution network transformer as a key field, recording different distribution network transformers into a group, matching acquired data information through a distribution network transformer equipment ID, acquiring a distribution network topological relation, a user ID, a GIS number, a user total number and transformer substation information, and associating;
s202, defining the ID of the null distribution network transformer equipment as 'incomplete data', and associating a secondary key field 'distribution network transformer name' with data information acquired by a marketing system;
s203, judging whether the association of the secondary key field 'distribution network transformer name' and the data information collected by the marketing system is successful, if so, returning to the step S201; otherwise, judging that the secondary key field 'distribution network transformer name' is error data;
and S204, marking error data and incomplete data.
4. The distribution network transformer reactive compensation situation analysis method of claim 3, wherein the sign that the association of the secondary keyword field "distribution network transformer name" and the data information collected by the marketing system is successful in step 203 is that the association matching state shows "ON".
5. The distribution network transformer reactive compensation situation analysis method according to claim 3 or 4, wherein the reactive compensation situation analysis process of step S3 is as follows:
s301, subtracting the collected forward active value at the time t1 from the forward active value at the time t2 to obtain an active total P; subtracting the collected forward reactive value at the time t1 from the forward reactive value at the time t2 to obtain a reactive total Q, and calculating the power factor cos phi of each line;
s302, classifying the power factors cos phi according to the numerical values of the power factors cos phi of all lines;
s303, subtracting the acquired reverse reactive power value at the time t1 from the acquired reverse reactive power value at the time t2 to obtain a reverse reactive power total Qf;
s304, judging whether the total reverse reactive power Qf and the total distribution network transformer user number are both larger than 0, if so, judging that the voltage of the distribution network transformer is normal, otherwise, judging that the distribution network transformer has a reactive power reverse transmission condition;
and S305, classifying the state of the reactive power reverse transmission condition, and analyzing and calibrating the work arrangement of the distribution network transformer.
6. The distribution network transformer reactive compensation situation analysis method according to claim 5, wherein the time t1 in step 301 represents the second timeiDay 0, time t2 denotes day NoiAt the 0 point of +1 day,irepresenting a positive integer.
7. The distribution network transformer reactive compensation situation analysis method according to claim 5, wherein the power factor cos phi in step 301 has a calculation formula:
wherein cosφRepresenting the power factor, P the active total and Q the reactive total.
8. The distribution network transformer reactive compensation situation analysis method according to claim 5, wherein the classification of the power factor cos φ in step S302 comprises:
A.cosφ>=0.95；B.0.95>cosφ>=0.90；C.0.90>cosφ>=0.85；D.0.85>cosφ>=0.80；
when the power factor cos phi calculated in the step S301 satisfies class a or class B, the power factor cos phi is qualified; when the power factor cos phi calculated in step S301 satisfies the class C or D, the power factor cos phi is not qualified.
9. The method for analyzing the reactive compensation condition of the distribution network transformer according to claim 5, wherein the step S305 classifies the state of the reactive power transfer condition, and the analyzing and calibrating the operation schedule of the distribution network transformer comprises:
A1. when the total reverse reactive power Qf is greater than 100, the state of the distribution network transformer reactive power reverse transmission condition is marked as 'needing to be processed';
B1. when the total reverse reactive power Qf meets 0< Qf is less than or equal to 100, the state of the distribution network transformer reactive power reverse transmission condition is marked as 'to be observed'.
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| CN109816161A (en) * | 2019-01-14 | 2019-05-28 | 中国电力科学研究院有限公司 | A kind of power distribution network operation computer-aided decision support System and its application method |
| CN110601219A (en) * | 2019-11-04 | 2019-12-20 | 中能建江苏能源科技有限公司 | Distributed power generation system reactive compensation method based on examination and prediction |
| CN110866735A (en) * | 2019-11-13 | 2020-03-06 | 广东电网有限责任公司 | Method and system for positioning switch of distribution network line contact point by using GIS model and readable storage medium |
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| CN114268110A (en) * | 2022-03-03 | 2022-04-01 | 广东电网有限责任公司梅州供电局 | Method and device for judging reactive compensation switching state of distribution transformer |
| CN114268110B (en) * | 2022-03-03 | 2022-06-28 | 广东电网有限责任公司梅州供电局 | Method and device for judging reactive compensation switching-on/off state of distribution transformer |
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