CN114678878A - Capacitor switching frequency control method and device - Google Patents

Capacitor switching frequency control method and device Download PDF

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Publication number
CN114678878A
CN114678878A CN202210493478.7A CN202210493478A CN114678878A CN 114678878 A CN114678878 A CN 114678878A CN 202210493478 A CN202210493478 A CN 202210493478A CN 114678878 A CN114678878 A CN 114678878A
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China
Prior art keywords
capacitor
capacitor bank
switching
information
switch
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CN202210493478.7A
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Chinese (zh)
Inventor
李兰茵
刘崧
武利会
王俊波
李国伟
张殷
宋安琪
刘少辉
欧晓妹
梁年柏
赖艳珊
王云飞
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Priority to CN202210493478.7A priority Critical patent/CN114678878A/en
Publication of CN114678878A publication Critical patent/CN114678878A/en
Pending legal-status Critical Current

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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
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a method and a device for controlling the switching times of a capacitor, wherein the method comprises the following steps: acquiring the reactive power of a capacitor bank of a transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information; sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank; based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total machine account of the capacitor bank equipment; associating the capacitor bank equipment general ledger with the switching action times corresponding to the capacitor bank to obtain a capacitor switching information ledger based on a substation bus; and determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control or not by adopting a dispersion analysis method. Therefore, the service lives of the capacitor bank and the switch are prolonged, and the strategy optimization of reactive compensation control is realized.

Description

Capacitor switching frequency control method and device
Technical Field
The present invention relates to capacitor technologies, and in particular, to a method and an apparatus for controlling switching times of a capacitor.
Background
Although the automatic switching capacitor bank in the power system at the present stage can effectively compensate the reactive power of the inductive load, thereby achieving the purpose of improving the operation efficiency of the power grid, the capacitors are widely distributed and have large quantity, the management of the capacitors is relatively dispersed, and the situations of faults or shortened service life of a switch or a capacitor bank body caused by frequent switching of the capacitor bank occur.
In order to solve the problem, the prior art only counts the action times of the circuit breaker, and when some high-voltage equipment is frequently switched, the service life of the switch is influenced, and the service life of a controlled high-voltage equipment body is also influenced; and because the circuit breakers are wide in application range and large in quantity in the power system, the circuit breakers have no systematic regulation requirements and sorting analysis requirements for centralized management, operation states and fault development trends of different high-voltage equipment switches and fault early warning analysis control.
Therefore, the method and the device for controlling the switching times of the capacitor are established, and have very important significance for centralized management, operation state monitoring and fault early warning control of the switching times of the capacitor.
Disclosure of Invention
The invention provides a method and a device for controlling the switching times of a capacitor, which can ensure the balanced switching of a capacitor bank, reduce the fault rate of a single group of capacitor bank bodies and switches, prolong the service life of the capacitor bank and the switches and realize the strategy optimization of reactive compensation control by monitoring and early warning the switching times of the capacitor bank.
In a first aspect, the present invention provides a method for controlling the number of times of switching a capacitor, including:
acquiring the reactive power of a capacitor bank of a transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank;
based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total machine account of the capacitor bank equipment;
associating the capacitor bank equipment general ledger with the switching action times corresponding to the capacitor bank to obtain a capacitor switching information ledger based on a substation bus;
and determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control or not by adopting a dispersion analysis method.
Optionally, determining whether all the capacitors in the capacitor switch information ledger need to be switched for the number of times by using a dispersion analysis method includes:
calculating the variation coefficient of the action times of all the capacitor switches in the capacitor switch information ledger by adopting the dispersion analysis method;
judging whether the variation coefficient of the switching action times is greater than or equal to a preset variation coefficient or not; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
Optionally, calculating a coefficient of variation of the number of times of the capacitor switch operations in the capacitor switch information ledger by using the dispersion analysis method includes:
sequentially calculating the standard deviation and the average value of all capacitors in the capacitor switch information ledger;
and calculating the variation coefficient of the switching action times of all the capacitors by combining the dispersion analysis method based on all the standard deviations and the average value.
Optionally, before determining whether all the capacitors in the capacitor switch information ledger need to be switched for the number of times, using a dispersion analysis method, the method further includes:
and eliminating the capacitor bank with the switching action times less than the preset switching action times in the capacitor bank.
Optionally, based on the idle work of the capacitor bank, performing classification statistics on the capacitor bank to obtain a total ledger of the capacitor bank device, including:
according to the reactive magnitude relation of the capacitor bank, carrying out capacity classification statistics on the capacitor bank to obtain a primary grouping result;
and according to the capacitor information corresponding to the capacitor bank, classifying the primary grouping result again by the capacitor bank according to the transformer substation bus information in the capacitor information, and integrating to obtain the total machine account of the capacitor bank equipment.
In a second aspect, the present invention further provides a device for controlling the number of times of switching a capacitor, comprising:
the acquisition module is used for acquiring the reactive power of the capacitor bank of the transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
the switching action frequency determining module is used for sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action frequency corresponding to the capacitor bank;
the capacitor bank equipment general ledger determination module is used for classifying and counting the capacitor banks based on the reactive power of the capacitor banks to obtain a capacitor bank equipment general ledger;
the capacitor switch information ledger determination module is used for associating the capacitor bank equipment general ledger with the switch action times corresponding to the capacitor bank to obtain a capacitor switch information ledger based on a substation bus;
and the control result determining module is used for determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control by adopting a dispersion analysis method.
Optionally, the control result determining module includes:
the variation coefficient determining submodule is used for calculating the variation coefficient of the times of all capacitor switch actions in the capacitor switch information ledger by adopting the dispersion analysis method;
the judgment submodule is used for judging whether the variation coefficient of the switching action times is larger than or equal to a preset variation coefficient or not; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
Optionally, the coefficient of variation determination submodule includes:
the parameter determining unit is used for sequentially calculating the standard deviation and the average value of all the capacitors in the capacitor switch information ledger;
and the variation coefficient determining unit is used for calculating the variation coefficient of the switching times of all the capacitors based on all the standard deviations and the average value and by combining the dispersion analysis method.
Optionally, the method further comprises:
and the eliminating module is used for eliminating the capacitor bank of which the switching action times are less than the preset switching action times in the capacitor bank.
Optionally, the total standing book determining module of the capacitor bank device includes:
the primary grouping result determining submodule is used for carrying out capacity classification statistics on the capacitor bank according to the reactive magnitude relation of the capacitor bank to obtain a primary grouping result;
and the capacitor bank equipment general ledger determining submodule is used for classifying the primary grouping result again according to the capacitor information corresponding to the capacitor bank and the transformer substation bus information in the capacitor information, and integrating to obtain the capacitor bank equipment general ledger.
A third aspect of the application provides an electronic device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the method for controlling the number of times of switching the capacitor according to the first aspect according to instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for executing the method for controlling the number of times of switching of a capacitor according to the first aspect.
According to the technical scheme, the invention has the following advantages:
the method comprises the steps of obtaining the reactive power of a capacitor bank of the transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information; sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank; based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total machine account of the capacitor bank equipment; associating the capacitor bank equipment general ledger with the switching action times corresponding to the capacitor bank to obtain a capacitor switching information ledger based on a substation bus; and determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control or not by adopting a dispersion analysis method. By monitoring and early warning the times of the switch actions of the capacitor bank, the balanced switching of the capacitor bank is ensured, the failure rate of a single-group capacitor bank body and a switch is reduced, the service lives of the capacitor bank and the switch are prolonged, and the strategy optimization of reactive compensation control is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a flowchart illustrating a first step of a method for controlling the switching times of a capacitor according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a second method for controlling the number of times of switching capacitors according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of SOE message switch displacement information according to an embodiment of the present invention;
fig. 4 is a block diagram of a capacitor switching frequency control apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for controlling the switching times of a capacitor, which can ensure the balanced switching of a capacitor bank, reduce the fault rate of a single-group capacitor bank body and a switch, prolong the service life of the capacitor bank and the switch and realize the strategy optimization of reactive compensation control by monitoring and early warning the switching times of the capacitor bank.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a first step of a method for controlling the switching times of a capacitor according to a first embodiment of the present invention, which may specifically include the following steps:
step S101, acquiring the reactive power of a capacitor bank of a transformer substation and the displacement information of all switches of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
step S102, sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank;
step S103, based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total machine account of the capacitor bank equipment;
step S104, associating the total standing book of the capacitor bank equipment with the switching action times corresponding to the capacitor bank to obtain a capacitor switch information standing book based on a transformer substation bus;
and step S105, determining whether all capacitors in the capacitor switch information ledger need to be subjected to switching frequency control by adopting a dispersion analysis method.
In an optional embodiment, before determining whether all the capacitors in the capacitor switch information ledger need to be switched for the control of the switching times by using a dispersion analysis method, the method further includes:
and eliminating the capacitor bank with the switching action times less than the preset switching action times in the capacitor bank.
In an optional embodiment, determining whether all the capacitors in the capacitor switch information ledger need to be switched for time control by using a dispersion analysis method includes:
calculating the variation coefficient of the action times of all the capacitor switches in the capacitor switch information ledger by adopting the dispersion analysis method;
judging whether the variation coefficient of the switching action times is greater than or equal to a preset variation coefficient or not; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
According to the embodiment of the invention, the reactive power of the capacitor bank of the transformer substation and the displacement information of all switches of the capacitor bank are obtained; the switch deflection information comprises time information, opening instruction information and closing instruction information; sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank; based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total ledger of the capacitor bank equipment; associating the total account of the capacitor bank equipment with the switching action times corresponding to the capacitor bank to obtain a capacitor switching information account based on a substation bus; and determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control or not by adopting a dispersion analysis method. By monitoring and early warning the times of the switch actions of the capacitor bank, the balanced switching of the capacitor bank is ensured, the failure rate of a single-group capacitor bank body and a switch is reduced, the service lives of the capacitor bank and the switch are prolonged, and the strategy optimization of reactive compensation control is realized.
Referring to fig. 2, a flowchart of a second step of the method for controlling the switching times of the capacitor according to the second embodiment of the present invention includes:
step S201, acquiring the reactive power of a capacitor bank of a transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
it should be noted that the embodiment of the present invention is implemented based on an Energy Management System (EMS), and the EM System is a general name of a modern power grid dispatching automation System and is composed of a basic function and an application function. The basic functions include: a computer, an operating system, and an EMS support system. The application functions include: data Acquisition And Supervisory Control And Data Acquisition (SCADA), Automatic Generation Control (AGC) And planning, And network application analysis.
Further, the application of the SCADA system in the power system is the most extensive, and the technical development is the most mature. The system is used as a main subsystem of an EMS system, has the advantages of complete information, efficiency improvement, correct control of the system running state, decision acceleration, capability of helping to quickly diagnose the system fault state and the like, and is an indispensable tool for power dispatching. The method has irreplaceable effects on improving the reliability, safety and economic benefit of the operation of the power grid, lightening dispatchers, realizing automation and modernization of power dispatching and improving the efficiency and level of dispatching.
Step S202, sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank;
in the embodiment of the invention, the real-time SOE message information of the transformer substation capacitor bank switch displacement is read from the SCADA.
As shown in fig. 3, fig. 3 is a schematic diagram of SOE message switch displacement information according to an embodiment of the present invention, in practical application, a terminal carried by the embodiment of the present invention is connected to an SCADA system, a "capacitor" keyword is searched in the SCADA system to obtain SOE message switch displacement information, and then two types of related instructions, namely "capacitor open and capacitor closed", are screened according to a time sequence, so as to determine open instruction information and closed instruction information, and "capacitor open and capacitor closed" of each group of corresponding capacitors is an accumulation of 1 switch displacement, thereby realizing statistics of the number of times of switching actions of a capacitor group.
Step S203, carrying out capacity classification statistics on the capacitor bank according to the magnitude relation of the reactive power of the capacitor bank to obtain a primary grouping result;
step S204, classifying the primary grouping result again by the capacitor bank according to the capacitor information corresponding to the capacitor bank and the transformer substation bus information in the capacitor information, and integrating to obtain the total machine account of the capacitor bank equipment;
in the embodiment of the invention, the SCADA is accessed to read the reactive power of the single group of capacitor banks, the capacitor capacity is classified and counted according to the size of the reactive power, then all the capacitor information of each bus of each transformer substation is imported to the terminal and the system carried by the embodiment of the invention, the capacitor banks which do not act in the SOE message are avoided being omitted, and the total ledger of all the capacitor bank equipment is established according to the grouping and classification of the transformer substation-bus-capacitor on the basis of the capacitor capacity classification and counting according to the size of the reactive power.
Step S205, associating the total ledger of the capacitor bank equipment with the switching action times corresponding to the capacitor bank to obtain a transformer substation bus-based capacitor switching information ledger;
in the embodiment of the invention, the capacitor with the switch displacement information is associated with the total ledger of all capacitor bank equipment to form a set of capacitor switch information ledger based on the bus of the transformer substation.
Step S206, calculating the standard deviation and the average value of all the capacitors in the capacitor switch information ledger in sequence;
in the embodiment of the invention, the switching action times of all capacitors of a single bus are counted according to capacity classification, and the standard deviation and the average value are calculated as follows:
Figure BDA0003632685900000081
Figure BDA0003632685900000082
wherein S is the standard deviation of the bus, i is the ith capacitor bank in the bus, n is the total number of the capacitor banks, and XiThe number of switching actions of the ith capacitor bank in the bus,
Figure BDA0003632685900000083
the average number of times of switching actions of all capacitors under the bus.
In a specific calculation, the standard deviation reflects the degree of dispersion of the number of switching actions of all capacitors under a single bus. A larger standard deviation represents that the difference between the switching times of most capacitors under the bus and the average switching times of all capacitors under the bus is larger; a smaller standard deviation indicates that the number of these actions is closer to the mean.
Step S207, calculating variation coefficients of the switch action times of all the capacitors based on all the standard deviations and the average values and by combining the dispersion analysis method;
in the embodiment of the invention, a dispersion analysis method is adopted, and the coefficient of variation is calculated as follows:
Figure BDA0003632685900000084
wherein, VsIs the variation coefficient of the switching times of the capacitor.
In the specific statistics, the variation coefficient of the switching times is the ratio of the standard deviation of the switching times of all capacitors in a single bus to the average switching times of all capacitors in the bus, and is used for measuring the relative dispersion degree.
Step S208, judging whether the variation coefficient of the switching action times is larger than or equal to a preset variation coefficient; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
In the embodiment of the invention, the alarm limit value, namely the preset variation coefficient is set to be VS > 10%, when the dispersion coefficient exceeds 10%, the system gives an early warning to the capacitor bank with the same capacity type and the corresponding bus and the capacitor bank with the same capacity type and more switching times, and ensures balanced switching of the capacitor bank.
In addition, in order to reduce system error early warning and truly reflect the relative discrete degree of the switching action times of each capacitor, the switching action times of the capacitor under a single bus are less than 5 times and are not included in statistics.
According to the method for controlling the switching times of the capacitor, provided by the embodiment of the invention, the reactive power of a capacitor bank of a transformer substation and the displacement information of all switches of the capacitor bank are obtained; the switch deflection information comprises time information, opening instruction information and closing instruction information; sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank; based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total machine account of the capacitor bank equipment; associating the capacitor bank equipment general ledger with the switching action times corresponding to the capacitor bank to obtain a capacitor switching information ledger based on a substation bus; and determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control or not by adopting a dispersion analysis method. By monitoring and early warning the times of the switch actions of the capacitor bank, the balanced switching of the capacitor bank is ensured, the failure rate of a single-group capacitor bank body and a switch is reduced, the service lives of the capacitor bank and the switch are prolonged, and the strategy optimization of reactive compensation control is realized.
To facilitate understanding of the beneficial effects of the present invention by those skilled in the art, the capacitor switching frequency control method of the present invention is exemplified below.
Please refer to the following table:
Figure BDA0003632685900000091
firstly, reading SOE message real-time information of displacement of a capacitor bank switch of a transformer substation in an SCADA system according to a time sequence, accumulating and counting the times of the capacitor bank switch action, and accessing the number into a designed system to be associated with a capacitor bank equipment general account;
then, deriving the number of capacitor switching actions under a single bus of each transformer substation from the system, taking an F station, a G station and an I station as examples, calculating the coefficient of variation of the number of capacitor switching actions under the single bus:
f station Vs194.87%, G station: vs27.56%, station I: vs3＝33.33％；
Finally, by calculating the variation coefficient of the switching action times, the switching action times of different capacitor banks under the F station 1M are large in dispersion degree, the situation that a single group of capacitor banks are frequently switched exists, the capacitor bank body with more switching times and the control switch have the defects of shortened service life or hidden trouble, and when the capacitor banks need to be switched again, the system can preferentially control the capacitors with less historical switching action times; the discrete degree of the action times of different capacitor banks under the station G1M is smaller, and the action times of a single capacitor bank under the same bus are more average; the variation coefficient of the switching action times of different capacitor banks under 2M of the I station exceeds the limit value, but the switching action times of the capacitor banks are less and more average, so that the relative dispersion degree of the switching action times of the capacitors is truly reflected for reducing the false early warning control of the system, and the switching action times of the capacitors under a single bus are less than 5 and are not taken into statistics.
Referring to fig. 4, a block diagram of an embodiment of a device for controlling the switching times of a capacitor is shown, which includes the following modules:
the obtaining module 401 is configured to obtain the reactive power of the capacitor bank of the substation and the displacement information of all switches of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
a switching action frequency determining module 402, configured to perform sequencing analysis on the opening instruction information and the closing instruction information according to the time information, so as to obtain a switching action frequency corresponding to the capacitor bank;
a capacitor bank equipment total standing account determining module 403, configured to perform classified statistics on the capacitor banks based on the idle work of the capacitor banks to obtain a capacitor bank equipment total standing account;
a capacitor switch information ledger determination module 404, configured to associate the capacitor bank device general ledger with the switching action times corresponding to the capacitor bank, to obtain a capacitor switch information ledger based on a substation bus;
and a control result determining module 405, configured to determine whether all the capacitors in the capacitor switch information ledger need to be controlled by switching times by using a dispersion analysis method.
In an alternative embodiment, the control result determining module 405 includes:
the variation coefficient determining submodule is used for calculating the variation coefficient of the times of all capacitor switch actions in the capacitor switch information ledger by adopting the dispersion analysis method;
the judgment submodule is used for judging whether the variation coefficient of the switching action times is larger than or equal to a preset variation coefficient or not; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
In an alternative embodiment, the coefficient of variation determination sub-module comprises:
the parameter determining unit is used for sequentially calculating the standard deviation and the average value of all capacitors in the capacitor switch information ledger;
and the variation coefficient determining unit is used for calculating the variation coefficient of the switching action times of all the capacitors based on all the standard deviations and the average value and by combining the dispersion analysis method.
In an optional embodiment, further comprising:
and the eliminating module is used for eliminating the capacitor bank with the switching action times less than the preset switching action times in the capacitor bank.
In an optional embodiment, the capacitor bank device general ledger determination module 403 includes:
the primary grouping result determining submodule is used for carrying out capacity classification statistics on the capacitor bank according to the reactive magnitude relation of the capacitor bank to obtain a primary grouping result;
and the capacitor bank equipment general ledger determining submodule is used for classifying the primary grouping result again according to the capacitor information corresponding to the capacitor bank and the transformer substation bus information in the capacitor information, and integrating to obtain the capacitor bank equipment general ledger.
The application also provides an electronic device, which comprises a processor and a memory;
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is used for executing the capacitor switching times control method in the above method embodiment according to instructions in the program code.
The present application also provides a computer-readable storage medium for storing program code for executing the method for controlling the number of times of switching the capacitor in the above-described method embodiment.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, or portions or all or portions of the technical solutions that contribute to the prior art, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for executing all or part of the steps of the methods described in the embodiments of the present application through a computer device (which may be a personal computer, a server, or a network device). And the aforementioned storage medium includes: a U-disk, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A method for controlling the number of times of switching a capacitor, comprising:
acquiring the reactive power of a capacitor bank of a transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action times corresponding to the capacitor bank;
based on the reactive power of the capacitor bank, carrying out classified statistics on the capacitor bank to obtain a total machine account of the capacitor bank equipment;
associating the total account of the capacitor bank equipment with the switching action times corresponding to the capacitor bank to obtain a capacitor switching information account based on a substation bus;
and determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control or not by adopting a dispersion analysis method.
2. The method for controlling the number of times of switching the capacitor according to claim 1, wherein determining whether or not all the capacitors in the capacitor switching information ledger need to be controlled for the number of times of switching by using a dispersion analysis method includes:
calculating the variation coefficient of the action times of all the capacitor switches in the capacitor switch information ledger by adopting the dispersion analysis method;
judging whether the variation coefficient of the switching action times is greater than or equal to a preset variation coefficient or not; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
3. The method for controlling the number of times of switching the capacitor according to claim 2, wherein calculating the coefficient of variation of the number of times of switching the capacitor in the capacitor switching information ledger by the dispersion analysis method includes:
sequentially calculating the standard deviation and the average value of all capacitors in the capacitor switch information ledger;
and calculating the variation coefficient of the switching action times of all the capacitors by combining the dispersion analysis method based on all the standard deviations and the average values.
4. The method for controlling the number of times of switching the capacitor according to claim 1, wherein before determining whether or not all the capacitors in the capacitor switching information ledger need to be controlled for the number of times of switching by using a dispersion analysis method, the method further comprises:
and eliminating the capacitor bank with the switching action times less than the preset switching action times in the capacitor bank.
5. The method for controlling the number of times of switching the capacitor according to claim 1, wherein the step of performing classification statistics on the capacitor banks based on the idle work of the capacitor banks to obtain a total ledger of the capacitor bank equipment comprises:
according to the magnitude relation of the reactive power of the capacitor bank, carrying out capacity classification statistics on the capacitor bank to obtain a primary grouping result;
and according to the capacitor information corresponding to the capacitor bank, classifying the primary grouping result again by the capacitor bank according to the transformer substation bus information in the capacitor information, and integrating to obtain the total machine account of the capacitor bank equipment.
6. A device for controlling the number of times of switching a capacitor, comprising:
the acquisition module is used for acquiring the reactive power of the capacitor bank of the transformer substation and all switch displacement information of the capacitor bank; the switch deflection information comprises time information, opening instruction information and closing instruction information;
the switching action frequency determining module is used for sequencing and analyzing the opening instruction information and the closing instruction information according to the time information to obtain the switching action frequency corresponding to the capacitor bank;
the capacitor bank equipment general ledger determination module is used for carrying out classified statistics on the capacitor banks based on the reactive power of the capacitor banks to obtain a capacitor bank equipment general ledger;
the capacitor switch information ledger determination module is used for associating the capacitor bank equipment general ledger with the switch action times corresponding to the capacitor bank to obtain a capacitor switch information ledger based on a substation bus;
and the control result determining module is used for determining whether all the capacitors in the capacitor switch information ledger need to be subjected to switching frequency control by adopting a dispersion analysis method.
7. The capacitor switching number control device according to claim 6, wherein the control result determination module includes:
the variation coefficient determining submodule is used for calculating the variation coefficient of the times of all capacitor switch actions in the capacitor switch information ledger by adopting the dispersion analysis method;
the judgment submodule is used for judging whether the variation coefficient of the switching action times is larger than or equal to a preset variation coefficient or not; if not, defining that the capacitor bank does not need to be subjected to switching control; and if so, defining the capacitor bank of the bus of the substation where the bus is located, and controlling the capacitor bank of the type where the bus is located to be switched.
8. The apparatus for controlling the number of times of switching the capacitor according to claim 7, wherein the variation coefficient determining submodule includes:
the parameter determining unit is used for sequentially calculating the standard deviation and the average value of all the capacitors in the capacitor switch information ledger;
and the variation coefficient determining unit is used for calculating the variation coefficient of the switching times of all the capacitors based on all the standard deviations and the average value and by combining the dispersion analysis method.
9. The capacitor switching frequency control device according to claim 6, further comprising:
and the eliminating module is used for eliminating the capacitor bank of which the switching action times are less than the preset switching action times in the capacitor bank.
10. The capacitor switching count control apparatus according to claim 6, wherein the capacitor bank device general ledger determination module includes:
the primary grouping result determining submodule is used for carrying out capacity classification statistics on the capacitor bank according to the reactive magnitude relation of the capacitor bank to obtain a primary grouping result;
and the capacitor bank equipment general ledger determining submodule is used for classifying the primary grouping result again according to the capacitor information corresponding to the capacitor bank and the transformer substation bus information in the capacitor information, and integrating to obtain the capacitor bank equipment general ledger.
CN202210493478.7A 2022-05-07 2022-05-07 Capacitor switching frequency control method and device Pending CN114678878A (en)

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CN202210493478.7A CN114678878A (en) 2022-05-07 2022-05-07 Capacitor switching frequency control method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210493478.7A CN114678878A (en) 2022-05-07 2022-05-07 Capacitor switching frequency control method and device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116454908A (en) * 2023-06-20 2023-07-18 广东电网有限责任公司佛山供电局 Capacitor bank switching frequency counting method and device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116454908A (en) * 2023-06-20 2023-07-18 广东电网有限责任公司佛山供电局 Capacitor bank switching frequency counting method and device
CN116454908B (en) * 2023-06-20 2023-09-08 广东电网有限责任公司佛山供电局 Capacitor bank switching frequency counting method and device

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