CN102684188B - Large and small running mode reactive power optimizing and joint adjusting method of electric system - Google Patents

Large and small running mode reactive power optimizing and joint adjusting method of electric system Download PDF

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Publication number
CN102684188B
CN102684188B CN201210141740.8A CN201210141740A CN102684188B CN 102684188 B CN102684188 B CN 102684188B CN 201210141740 A CN201210141740 A CN 201210141740A CN 102684188 B CN102684188 B CN 102684188B
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data
network
bpa
big
unit
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CN102684188A (en
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李滨
李凌
韦化
农蔚涛
阳育德
邓秋荃
韦园清
覃海志
梁振成
朱桂兰
张弛
孙艳
刘鹏飞
潘艳红
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Guangxi University
Guangxi Power Grid Co Ltd
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Guangxi University
Guangxi Power Grid Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

Abstract

The invention discloses a large and small running mode reactive power optimizing and joint adjusting method of an electric system. The method comprises the following steps of: reading in the BPA (back propagation algorithm) data of the electric network and carrying out power flow calculation by means of a PSD-BPA (phase sensitive detection-back propagation algorithm) software tool; for electric network data, the power flow of which is not converged, adjusting through an optimal power flow module, carrying out error screening and correction on a network parameter and a running parameter, and giving out a reasonable running mode under a network area framework; obtaining the data of a needed network area from the converged electric network data through an equivalent method, and analyzing data needed by a reactive power optimizing module from the converged electric network data; and carrying out large and small running mode reactive power joint optimization. By using the method, a transformer tapping adapting to a large running mode and a small running mode can be found out; a reactive power voltage optimization configuration policy is given out; the reactive power voltage optimization running between each two voltage classes is realized; the voltage percent of pass of the whole network is improved; a theoretical basis is provided for making the running modes of the electric network; and the electric network is guaranteed to run safely and stably.

Description

A kind of electric power system size operational mode idle work optimization joint debugging method
Technical field
The present invention relates to power system reactive power analysis and optimization field, specifically a kind of electric power system size operational mode idle work optimization joint debugging method.
Background technology
In recent ten years, power system safety and stability problem becomes the focus that industry is paid close attention to day by day.In modern power network, because the unify load of long transmission line of weak pattern increases the weight of, the transmission capacity of electrical network more and more approaches its limit, makes the stable problem of system more outstanding.Optimize the operational mode of electric power system, can improve significantly the safety and stability environment of electric power system, and the idle work optimization of electric power system is important step wherein, it relates to large-scale, non-linear, dynamic and discrete combinatorial problem.Existing flow process be operations staff according to load data, grid structure and experience initialization, carry out verification by the flow calculation program of BPA; Then the tidal current chart of manual analysis BPA, artificially determines each relevant adjustment amount by each point voltage and direction of tide.So, even if sophisticated operations staff, also big frame in hand, and a lot of detailed problem can not be exhaustive, find optimum scheme is very difficult thing.Along with the development of power system analysis method and computing technique, be badly in need of solving the above problems, carry out the scheme comprehensively solving so far there are no the many-side deficiency to traditional idle work optimization.
Summary of the invention
The object of the invention is to propose a kind of electric power system size operational mode idle work optimization joint debugging method, the reactive voltage that the method can be optimized between each electric pressure is coordinated to control, propose reactive Voltage Optimum collocation strategy, improve the rate of qualified voltage of the whole network, reduce system losses.For the operational mode of formulating electrical network provides theoretical foundation, guarantee power network safety operation.
The present invention addresses the above problem adopted technical scheme: a kind of electric power system size operational mode idle work optimization joint debugging method, comprises the following steps:
(1) large mode data and the little mode data of input are carried out to BPA trend calculation check, if the result of BPA trend calculation check does not restrain, be adjusted to convergence by optimal load flow module;
(2) the BPA data file of verification convergence or adjustment convergence is carried out to Equivalent Network, equivalence goes out the data of required network;
(3) whether verification Equivalent Network result restrains, if do not restrain, adjusts original BPA data file and again reads in;
(4) from equivalent network data, parse big or small mode and optimize required rack data and service data;
(5) the big or small mode combined optimization parsing required rack data and service data are carried out to combined optimization;
(6) if the idle combined optimization of big or small mode calculates convergence, generate new BPA data file, and Automatically invoked BPA Software tool carries out trend verification, verification convergence, generates destination file;
(7) if the idle combined optimization of big or small mode calculates the BPA data file check results not restraining or generate does not restrain, adjust parameter setting, recalculate;
(8), according to idle work optimization module result of calculation, form electrical network analysis form.
The system that a kind of electric power system size operational mode idle work optimization joint debugging method adopts, this system comprises data interface module, size mode idle work optimization uniting and adjustment computing module and interpretation of result and statistical module, data interface module is realized the interactive function of data, data interface module comprises BPA data file unit, Database Unit, interface management unit and Data Management Unit, BPA data file unit resolves goes out required grid structure parameter and the system operational parameters of big or small mode idle work optimization uniting and adjustment computing module, grid structure parameter and system operational parameters are in conjunction with transformer given in Database Unit, capacitor, reactor parameter, generate the needed data file of big or small mode idle work optimization uniting and adjustment computing module, and by Data Management Unit to transformer gear parameter given in grid structure parameter and system operational parameters and Database Unit, capacitor and reactor group parameter are adjusted accordingly, the data that interface management unit calculates big or small mode idle work optimization uniting and adjustment computing module are written back to relevant position, BPA data file unit, size mode idle work optimization uniting and adjustment computing module solves calculating by the monthly large and small operational mode of simultaneous, analyzes and calculate the common load tap changer adapting under two kinds of modes, interpretation of result and statistical module comprise analysis report unit, analysis of strategies unit and print unit, the state value of the reactive power/voltage control equipment before analysis report unit calculates big or small mode idle work optimization uniting and adjustment computing module and after calculating is added up and is formed reactive voltage analysis report, comprise: 500kV transformer tapping position and corresponding voltage value, 500kV reactive compensation capacity of substation summary sheet, 220kV reactive compensation capacity of substation summary sheet, electrical network tracking unit output summary sheet, network loss statistical conditions before and after optimizing, analysis of strategies unit provides the optimisation strategy of electric network reactive-load configuration by analyzing the result of calculation of big or small mode idle work optimization uniting and adjustment computing module, comprise: gear is adjusted in the each electric pressure tap of transformer, capacitor under current reactive power compensation configuring condition and reactor switching, electrical network part transformer station increases the suggestion of capacitor and reactor configuration, print unit prints reactive voltage analysis report, so that archive management, interpretation of result and statistical module are directly used in and instruct establishment power system operating mode.
Compared with prior art scheme, the invention has the beneficial effects as follows:
The present invention has found two transformer tappings that mode is all applicable to, realize the reactive Voltage Optimum operation between the electric pressure under monthly large and small mode, reduce the via net loss of electrical network, guaranteed the quality of voltage between each electric pressure, met relevant laws and regulations of the state Its Relevant Technology Standards.Solve the many-side deficiency of traditional idle work optimization, all beyond example at home and abroad.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of electric power system size operational mode idle work optimization joint debugging method of the present invention.
Fig. 2 is the flow chart of electric power system size operational mode joint debugging method of the present invention.
Embodiment
With reference to the accompanying drawings, describe specific embodiment of the invention scheme in detail.
Embodiment 1
As shown in Figure 1, the system architecture diagram of electric power system size operational mode idle work optimization joint debugging method of the present invention, this system comprises data interface module, size mode idle work optimization uniting and adjustment computing module and interpretation of result and statistical module, data interface module is realized the interactive function of data, data interface module comprises BPA data file unit, Database Unit, interface management unit and Data Management Unit, BPA data file unit resolves goes out required grid structure parameter and the system operational parameters of big or small mode idle work optimization uniting and adjustment computing module, grid structure parameter and system operational parameters are in conjunction with transformer given in Database Unit, capacitor, reactor parameter, generate the needed data file of big or small mode idle work optimization uniting and adjustment computing module, and by Data Management Unit to transformer gear parameter given in grid structure parameter and system operational parameters and Database Unit, capacitor and reactor group parameter are adjusted accordingly, the data that interface management unit calculates big or small mode idle work optimization uniting and adjustment computing module are written back to relevant position, BPA data file unit, size mode idle work optimization uniting and adjustment computing module solves calculating by the monthly large and small operational mode of simultaneous, analyzes and calculate the common load tap changer adapting under two kinds of modes, interpretation of result and statistical module comprise analysis report unit, analysis of strategies unit and print unit, the state value of the reactive power/voltage control equipment before analysis report unit calculates big or small mode idle work optimization uniting and adjustment computing module and after calculating is added up and is formed reactive voltage analysis report, comprise: 500kV transformer tapping position and corresponding voltage value, 500kV reactive compensation capacity of substation summary sheet, 220kV reactive compensation capacity of substation summary sheet, electrical network tracking unit output summary sheet, network loss statistical conditions before and after optimizing, analysis of strategies unit provides the optimisation strategy of electric network reactive-load configuration by analyzing the result of calculation of big or small mode idle work optimization uniting and adjustment computing module, comprise: gear is adjusted in the each electric pressure tap of transformer, capacitor under current reactive power compensation configuring condition and reactor switching, electrical network part transformer station increases the suggestion of capacitor and reactor configuration, print unit prints reactive voltage analysis report, so that archive management, interpretation of result and statistical module are directly used in and instruct establishment power system operating mode.
As shown in Figure 2, a kind of electric power system size operational mode idle work optimization joint debugging method, comprises the steps:
1, read in the BPA data of the large and small two kinds of operational modes of electrical network, carry out trend verification by means of PSD-BPA Software tool, if trend check results does not restrain, adjust by optimal load flow module, network parameter and operational factor are carried out mistake screening and proofreaied and correct, provide rational operational mode under the framework of barrier;
2, the electric network data of convergence is the data basis that idle work optimization is analyzed, and goes out the data in required barrier from the electric network data medium value of convergence, and therefrom parses the data that idle work optimization module needs;
3, whether verification Equivalent Network result restrains, if do not restrain, adjusts original BPA data file and again reads in;
4, carry out the idle combined optimization of big or small operational mode and calculate, the transformer tapping that finds two kinds of modes to be all applicable to, realizes and meets the operation of the reactive Voltage Optimum between different electric pressures under monthly big or small operational mode;
If 5 idle work optimizations calculate convergence, export optimum results, and generate destination file, if do not restrained, adjust equivalent system parameters, re-start the idle combined optimization of big or small operational mode and calculate.
It is the in the situation that of given system network architecture and system loading that idle combined optimization of the present invention calculates, assurance meets under the prerequisite of user power utilization demand, optimize the static service conditions of electric power system, by regulating control variables to make the target function value of appointment reach minimum, meet physical restriction and the operation restriction of system to control variables, state variable and variable function simultaneously.Adjusting control variables comprises meritorious idle the exerting oneself of generator, load tap changer, capacitor group grouping switching etc.Not only can guarantee the quality of voltage of the whole network by idle work optimization, and can obtain considerable economic benefit, can realize fail safe and the economy of the quality of power supply, system operation.
The Mathematical Modeling of little mode idle work optimization uniting and adjustment: the uniting and adjustment of big or small mode idle work optimization are in order to find two transformer tappings that operational mode is all applicable to of size, carry out associating optimizing using big or small operational mode active power loss and minimum as target function, realization meets the reactive Voltage Optimum operation between the electric pressure under monthly big or small operational mode, coordinate to control the quality of voltage between each electric pressure, meet Southern Power Grid Company quality of voltage and var administrative standard.
Control variables parameter setting in the present invention comprises: meritorious exert oneself, idlely exert oneself, transformer tapping, capacity reactance device switching group number.Wherein: meritorious exert oneself be set to as requested by some power plant meritorious exert oneself be made as adjustable; Idle exerting oneself requires all balance node idle of the value nodes such as meritorious conditional PV node, electrical network be outer and electrical network to exert oneself all adjustable; Transformer tapping is all adjustable; Electrical network 500kV, 220kV transformer station capacity reactance device is all adjustable.The maximum permission of the capacitor compensation capacity of all transformer stations is 80% of existing configuration compensation capacity, and the maximum compensation capacity that allows of reactor of all transformer stations is existing reactor configuration capacity.
Its constraints parameter setting comprises: load or burden without work model, node voltage.Wherein: load or burden without work model all adds constrained; Node voltage restriction comprises 500kV, 220kV, 110kV busbar voltage, generator voltage, and limited field is as shown in table 1.
Table 1 node voltage limited field
Before and after the optimization of the embodiment of the present invention, certain electrical network 500kV main transformer tap joint position is as shown in table 2.By combined optimization, find out the each load tap changer that meets grid net loss minimum.
Certain electrical network 500kV main transformer tap joint position of front and back is optimized in the uniting and adjustment of the big or small operational mode idle work optimization of table 2
According to amount of power supply, Energy loss before and after optimizing under the large mode of certain month big or small operational mode idle work optimization uniting and adjustment, can calculate the Network Loss Rate of electrical network by Network Loss Rate computing formula.It is as shown in table 3 that the large mode Network Loss Rate situation in front and back is optimized in electrical network month big or small operational mode idle work optimization uniting and adjustment, and after optimizing, active power loss is than optimizing front few 9.35MW, and Network Loss Rate reduces by 0.0698%.It is as shown in table 4 that the little mode Network Loss Rate situation in front and back is optimized in electrical network month big or small operational mode idle work optimization uniting and adjustment, optimizes rear active power loss than few 7.57MW before optimizing, Network Loss Rate reduction by 0.0949%.
The large mode Network Loss Rate in front and back is optimized in month big or small operational mode idle work optimization uniting and adjustment of table 3 electrical network
The little mode Network Loss Rate in front and back is optimized in month big or small operational mode idle work optimization uniting and adjustment of table 4 electrical network

Claims (1)

1. an electric power system size operational mode idle work optimization uniting and adjustment system, it is characterized in that, this system comprises data interface module, size mode idle work optimization uniting and adjustment computing module and interpretation of result and statistical module, data interface module is realized the interactive function of data, data interface module comprises BPA data file unit, Database Unit, interface management unit and Data Management Unit, BPA data file unit resolves goes out required grid structure parameter and the system operational parameters of big or small mode idle work optimization uniting and adjustment computing module, grid structure parameter and system operational parameters are in conjunction with transformer given in Database Unit, capacitor, reactor parameter, generate the needed data file of big or small mode idle work optimization uniting and adjustment computing module, and by Data Management Unit to transformer gear parameter given in grid structure parameter and system operational parameters and Database Unit, capacitor and reactor group parameter are adjusted accordingly, the data that interface management unit calculates big or small mode idle work optimization uniting and adjustment computing module are written back to relevant position, BPA data file unit, size mode idle work optimization uniting and adjustment computing module solves calculating by the monthly large and small operational mode of simultaneous, analyzes and calculate the common load tap changer adapting under two kinds of modes, interpretation of result and statistical module comprise analysis report unit, analysis of strategies unit and print unit, the state value of the reactive power/voltage control equipment before analysis report unit calculates big or small mode idle work optimization uniting and adjustment computing module and after calculating is added up and is formed reactive voltage analysis report, comprise: 500kV transformer tapping position and corresponding voltage value, 500kV reactive compensation capacity of substation summary sheet, 220kV reactive compensation capacity of substation summary sheet, electrical network tracking unit output summary sheet, network loss statistical conditions before and after optimizing, analysis of strategies unit provides the optimisation strategy of electric network reactive-load configuration by analyzing the result of calculation of big or small mode idle work optimization uniting and adjustment computing module, comprise: gear is adjusted in the each electric pressure tap of transformer, capacitor under current reactive power compensation configuring condition and reactor switching, electrical network part transformer station increases the suggestion of capacitor and reactor configuration, print unit prints reactive voltage analysis report, so that archive management, interpretation of result and statistical module are directly used in and instruct establishment power system operating mode,
A joint debugging method that is applicable to this electric power system size operational mode idle work optimization uniting and adjustment system, comprises the following steps:
(1) large mode data and the little mode data of input are carried out to BPA trend calculation check, if the result of BPA trend calculation check does not restrain, be adjusted to convergence by optimal load flow module;
(2) the BPA data file of verification convergence or adjustment convergence is carried out to Equivalent Network, equivalence goes out the data of required network;
(3) whether verification Equivalent Network result restrains, if do not restrain, adjusts original BPA data file and again reads in, if convergence, execution step (4);
(4) from equivalent network data, parse big or small mode and optimize required rack data and service data;
(5) the big or small mode combined optimization parsing required rack data and service data are carried out to combined optimization;
(6) if the idle combined optimization of big or small mode calculates convergence, generate new BPA data file, and Automatically invoked BPA Software tool carries out trend verification, verification convergence, generates destination file; Do not restrain if big or small mode is idle combined optimization calculates the BPA data file check results not restraining or generate, adjust parameter setting, recalculate;
It is the in the situation that of given system network architecture and system loading that described idle combined optimization calculates, assurance meets under the prerequisite of user power utilization demand, optimize the static service conditions of electric power system, by regulating control variables to make the target function value of appointment reach minimum, target function value is using big or small operational mode active power loss and minimum as target function, meet system to control variables simultaneously, the physical restriction of state variable and variable function and operation restriction, regulate control variables to comprise meritorious exerting oneself, idle exerting oneself, transformer tapping, capacity reactance device switching group number, its constraints parameter setting comprises load or burden without work model, node voltage, wherein, load or burden without work model all adds constrained, node voltage restriction comprises 500kV, 220kV, 110kV busbar voltage, generator voltage,
(7), according to idle work optimization module result of calculation, form electrical network analysis form.
CN201210141740.8A 2012-05-09 2012-05-09 Large and small running mode reactive power optimizing and joint adjusting method of electric system Expired - Fee Related CN102684188B (en)

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