CN105207224B - SVC and capacitor, the idle displacement control method of reactor - Google Patents
SVC and capacitor, the idle displacement control method of reactor Download PDFInfo
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- CN105207224B CN105207224B CN201510598654.3A CN201510598654A CN105207224B CN 105207224 B CN105207224 B CN 105207224B CN 201510598654 A CN201510598654 A CN 201510598654A CN 105207224 B CN105207224 B CN 105207224B
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The present invention relates to a kind of SVC and capacitor, the idle displacement control method of reactor, belong to electric power automatism voltage control technical field.The method first calculates the Reactive Power Margin of SVC, when the Reactive Power Margin of any one SVC is unsatisfactory for the threshold of formulation, into the idle coordination strategy generation between SVC, if the strategy of generation is by verification, all of SVC regulated quantitys are unsatisfactory for respective minimum idle condition step-length, then triggering SVC and electric capacity, the idle displacement of reactor, if voltage conditions allow first to adjust SVC in transformer station, then after SVC regulations, next periodic Control can produce the tactful switched capacitor in opposite Reactive-power control direction, reactor, so as to complete the displacement of static reactive and dynamic reactive;If voltage-regulation is not allowed, then according to opposite regulation direction generation switched capacitor, the idle Replacement Strategy of reactor, to increase or decrease busbar voltage so that busbar voltage possesses enough margins of safety, then SVC is adjusted again idle, so as to complete the displacement of static reactive and dynamic reactive.
Description
Technical field
The present invention relates to a kind of SVC and capacitor, the idle displacement control method of reactor, belong to electricity
Force system automatism voltage control field.
Background technology
Automatism voltage control (Automatic Voltage Control, hereinafter referred to as AVC) has become modern electric system
The indispensable part of system scheduling, AVC is by coordinating various control devices (generator, capacitor, reactor, transformer
The devices such as tap, SVC (abbreviation SVC), static reacance generator), control the reasonable nothing of each voltage class
Work(flows, and reduces grid loss, improves Network Voltage Stability.
Tertiary voltage control based on soft sectoring turns into the main flow control model of country AVC, one of them important link
It is exactly the idle control of transformer station.Common equipment in transformer station includes capacitor, reactor, many documents and patent for
Transformer station's inner capacitor, the coordination control of reactor are studied and analyze, and are mainly segmented into two kinds:One kind is traditional 9th area
Figure, the mode of 17 area's figures;Another kind is the strategy based on Expert Rules storehouse.From the point of view of applicable cases, the former is more as local
The tactful foundation of control, the latter is the superset of the former control strategy, controls more fine, tactful more flexible, general effect
More preferably.Guo Qing comes, Sun Hongbin et al. exists《(the coordination approach of continuous variable and discrete variable in automatism voltage control in transformer station
(1) voltage control is coordinated in transformer station》Power transformation is elaborated in (Automation of Electric Systems, in August, 2008 V32N8, pp39-42)
To stand completed using expert control strategy and coordinate the strategy of control.
There is stronger Reactive-power control ability and faster Reactive-power control speed in the transformer station for configuring SVC, and SVC is certain
In the range of can be what is continuously adjusted, and based on the semiconductors such as IGCT control, possess dynamic reactive responding ability quickly.
Power network receives disturbance or electric network reactive-load demand when quickly changing, being capable of quick regulation, it is ensured that Reactive Power Balance, so as to improve
Voltage stabilization.If control mode is improper, easily causes SVC and stick limit or lower limit operation, Reactive-power control ability is weakened significantly,
Cannot interdependent system fasting conditions reactive requirement.How transformer station in SVC and electric capacity, reactor, the nothing that keeps SVC higher are coordinated
Work(adjusts nargin, and the dynamic reactive displacement of capacitor, the static reactive of reactor and SVC is carried out under triggering under suitable condition
Be one highly significant with value problem.Here coordination and SVC in appropriate condition, including station between SVC with
Electric capacity, reactor coordinate opportunity;In the case of there are many SVC, the Reactive Power Margin deficiency of separate unit SVC is not due between SVC
Coordination is improper to be caused, and should just trigger SVC and capacitor, the idle displacement of reactor, therefore so-called SVC and capacitor, reactance
The link that the idle method of replacing of device is critically important is exactly trigger condition.
Wang Xuran, Guo Qing et al. have studied the idle Replacement Strategy of SVC and power plant in automatism voltage control, bis- grades of AVC
During control by the way of the two-stage controls, first balance it is idle, after realize the idle displacement of SVC and power generator, on SVC
With the control strategy of power plant referring to《Consider the secondary voltage control of quick dynamic passive compensation》(Automation of Electric Systems, 2015
The 2nd phase of volume 39 year), but provide electric capacity of the SVC with discrete control device, reactor in this article.
In current automatism voltage control application, SVC and electric capacity, the idle replacement proble of reactor are not yet solved well,
Although existing control strategy can be avoided irrational reactive circular power flow, but cause the dynamic reactive nargin of SVC too low.
The content of the invention
The purpose of the present invention aims to solve the problem that the deficiencies in the prior art, proposes a kind of SVC and capacitor, electricity
The idle displacement control method of anti-device, realizes the displacement of static reactive and dynamic reactive, so as to ensure the enough Reactive Power Margins of SVC
With the fast reactive regulatory demand of responsive electricity grid, voltage stability is improved.
SVC and capacitor, the idle method of replacing of reactor in transformer station proposed by the present invention, including
Following steps:
1) total number of SVC in transformer station is designated as N, i-th the current idle of SVC is designated as QDi, idle Upper-lower Limit value
It is designated as respectivelyReactive-power control amount is designated as Δ QDi, the idle operating point of exerting oneself of acquiescence for presetting SVC is designated asTakeIf minimum, maximal regulated step-length is designated as successively SVC without
Work(nargin threshold value is designated asEngineer applied can typically take
2) the Reactive Power Margin index of i-th SVC after adding Reactive-power control amount is setIfThen it is transferred to 3), does not enter line replacement control otherwise, terminates;
3) the following quadratic programming model being made up of optimization aim and constraints is solved, the Reactive-power control amount of SVC is obtained,
(for convenience) each amount uses vector representation below, and optimization aim is that the Reactive Power Margin index quadratic sum of all SVC is minimum
(i.e. the Reactive Power Margin of SVC is maximum in quadratic sum meaning):
ΘsvcIt is Reactive Power Margin indicator vector;
Constraints is
VB min≤VB0+CΔQD≤VB max (1)
VB minRepresent busbar voltage lower limit, VB maxBus voltage upper limit is represented, formula (1) represents each bus electricity in transformer station
In the bound that pressure should set at it;The idle lower limits of SVC are represented,Represent the idle upper limits of SVC, Δ QDRepresent
The Reactive-power control amount of SVC, QDThe idle of current SVC is represented to exert oneself;
Formula (2) represents that the Reactive-power control amount of SVC equipment all should be in its idle bound;Represent the maximum of SVC
Regulation step-length;
Formula (3) represents that SVC Reactive-power control step-lengths should be less than its maximal regulated step-length;C is sensitivity squares of the SVC to bus
Battle array;
4) following judgement is carried out again to Reactive-power control amount:If the Reactive-power control amount that i-th SVC equipment is calculated is Δ
QDi, compare Δ QDiBe can adjust with its minimum idleSize;If any oneSVC, be discontented with
FootThen enter 5);Otherwise by Reactive-power control amount Δ QDIt is converted into control instruction and is issued to each SVC, completes SVC
Idle control;
5) SVC carries out the displacement of static reactive and dynamic reactive with electric capacity, reactor:If voltage bar in current transformer substation
Part allows first to adjust that SVC is idle, then first directly increase and decrease SVC is idle to increase dynamic reactive nargin, and lower whorl is controlled according to opposite
Reactive-power control direction switched capacitor, reactor, so that the displacement of static reactive and dynamic reactive is completed, specifically, if
Epicycle SVC additional issues are idle, then lower whorl is taken and cut capacitor or throwing reactor according to capacitor and the ruuning situation of reactor
Control device (capacitor and reactor can not put into simultaneously, therefore cut electric capacity and throw reactance necessarily only a kind of selection);If
Epicycle SVC subtracts and sends out idle, then lower whorl takes throwing capacitor or cut reactor according to capacitor and the ruuning situation of reactor
Control device;Otherwise it is transferred to 6);
6) first according to opposite Reactive-power control direction switched capacitor, reactor, to increase or decrease busbar voltage so that
Busbar voltage possesses enough margins of safety, and lower whorl controls to adjust that SVC is idle, so as to complete putting for static reactive and dynamic reactive
Change, specifically, idle if necessary to SVC additional issues, then according to capacitor and the ruuning situation of reactor, epicycle is used and cuts electric capacity
The control device of device or throwing reactor, it is idle that SVC is issued additional in lower whorl control again;Subtracting if necessary to SVC sends out idle, then according to electric capacity
The ruuning situation of device and reactor, using throwing capacitor or cutting the control device of reactor, lower whorl control subtracts hair SVC to epicycle again
It is idle.
SVC and capacitor, the idle method of replacing of reactor in transformer station proposed by the present invention, its is excellent
Putting is:SVC Reactive-power control nargin can be kept so that electric capacity, reactor undertake the reactive requirement on slow basis, Reactive Power Margin
Sufficient SVC undertakes quick reactive requirement, so as to improve the voltage stability of power network;By solving quadratic programming combination SVC
Minimal condition step-length judge whether to need to carry out SVC and electric capacity, the idle displacement of reactor, solve the association that many SVC coexist
Tune problem, reduces unnecessary electric capacity, reactor switching.
Specific embodiment
SVC and capacitor, the idle method of replacing of reactor in transformer station proposed by the present invention, including
Following steps:
1) total number of SVC in transformer station is designated as N, i-th the current idle of SVC is designated as QDi, idle Upper-lower Limit value
It is designated as respectivelyReactive-power control amount is designated as Δ QDi, the idle operating point of exerting oneself of acquiescence for presetting SVC is designated asTakeIf minimum, maximal regulated step-length is designated as successively SVC
Reactive Power Margin threshold value is designated asEngineer applied can typically take
2) the Reactive Power Margin index of i-th SVC after adding Reactive-power control amount is setIfThen it is transferred to 3), does not enter line replacement control otherwise, terminates;
3) the following quadratic programming model being made up of optimization aim and constraints is solved, the Reactive-power control amount of SVC is obtained,
(for convenience) each amount uses vector representation below, and optimization aim is that the Reactive Power Margin index quadratic sum of all SVC is minimum
(i.e. the Reactive Power Margin of SVC is maximum in quadratic sum meaning),:
ΘsvcIt is Reactive Power Margin indicator vector,
It is constrained to
VB min≤VB0+CΔQD≤VB max (1)
VB minRepresent busbar voltage lower limit, VB maxBus voltage upper limit is represented, formula (1) represents each bus electricity in transformer station
In the bound that pressure should set at it;The idle lower limits of SVC are represented,Represent the idle upper limits of SVC, Δ QDRepresent
The Reactive-power control amount of SVC, QDRepresent the idle of current SVC to exert oneself, the Reactive-power control amount of formula (2) SVC equipment all should be idle at its
In bound;The maximal regulated step-length of SVC is represented, formula (3) represents SVC Reactive-power control step-lengths and should be less than its maximum tune
Section step-length;C is sensitivity matrix of the SVC to bus;
4) following judgement is carried out again to Reactive-power control amount:If the Reactive-power control amount that i-th SVC equipment is calculated is Δ
QDi, compare Δ QDiBe can adjust with its minimum idleSize;If any oneSVC, be discontented with
FootThen enter 5);Otherwise by Reactive-power control amount Δ QDIt is converted into control instruction and is issued to each SVC, completes SVC
Idle control;
5) SVC carries out the displacement of static reactive and dynamic reactive with electric capacity, reactor:If voltage bar in current transformer substation
Part allows first to adjust that SVC is idle, then first directly increase and decrease SVC is idle to increase dynamic reactive nargin, and lower whorl is controlled according to opposite
Reactive-power control direction switched capacitor, reactor, so that the displacement of static reactive and dynamic reactive is completed, specifically, if
Epicycle SVC additional issues are idle, then lower whorl is taken and cut capacitor or throwing reactor according to capacitor and the ruuning situation of reactor
Control device (capacitor and reactor can not put into simultaneously, therefore cut electric capacity and throw reactance necessarily only a kind of selection);If
Epicycle SVC subtracts and sends out idle, then lower whorl takes throwing capacitor or cut reactor according to capacitor and the ruuning situation of reactor
Control device;Otherwise it is transferred to 6);
6) then, to increase or decrease busbar voltage, make first according to opposite Reactive-power control direction switched capacitor, reactor
Obtain busbar voltage and possess enough margins of safety, SVC is idle for lower whorl control and regulation, so as to complete static reactive with dynamic reactive
Displacement, specifically, idle if necessary to SVC additional issues, then according to capacitor and the ruuning situation of reactor, epicycle is used and cuts electricity
The control device of container or throwing reactor, it is idle that SVC is issued additional in lower whorl control again;Subtracting if necessary to SVC sends out idle, then according to electricity
The ruuning situation of container and reactor, using throwing capacitor or cutting the control device of reactor, lower whorl control subtracts hair to epicycle again
SVC is idle.
Claims (1)
1. a kind of SVC and capacitor, the idle displacement control method of reactor, it is characterised in that the method bag
Include following steps:
1) total number of SVC in transformer station is designated as N, i-th the current idle of SVC is designated as QDi, idle Upper-lower Limit value difference
It is designated asReactive-power control amount is designated as △ QDi, the idle operating point of exerting oneself of acquiescence for presetting SVC is designated as
TakeIf adjustable idle it is designated as successively minimum, maximumSVC is idle
Nargin threshold value is designated as
2) the Reactive Power Margin indicator vector of i-th SVC after adding Reactive-power control amount is setIfThen it is transferred to 3), does not enter line replacement control otherwise, terminates;
3) the following quadratic programming model being made up of optimization aim and constraints is solved, the Reactive-power control amount of SVC is obtained, below
Each amount uses vector representation, and optimization aim is that the Reactive Power Margin indicator vector quadratic sum of all SVC is minimum:
ΘsvcIt is Reactive Power Margin indicator vector,
Constraints is
VBmin≤VB0+C△QD≤VBmax (1)
VBminRepresent busbar voltage lower limit, VBmaxRepresent bus voltage upper limit, formula (1) represents in transformer station each busbar voltage should be
In the bound of its setting;The idle lower limits of SVC are represented,Represent the idle upper limits of SVC, △ QDRepresent the idle of SVC
Regulated quantity, QDRepresent the idle of current SVC to exert oneself, the Reactive-power control amount that formula (2) represents SVC equipment all should be in its idle bound
It is interior;The maximum for representing SVC can adjust idle, and formula (3) represents SVC Reactive-power control amounts and should be less than its adjustable nothing of maximum
Work(;C is sensitivity matrix of the SVC to bus;
4) following judgement is carried out again to Reactive-power control amount:If the Reactive-power control amount that i-th SVC equipment is calculated is △ QDi, than
Compared with △ QDiBe can adjust with its minimum idleSize;If any oneSVC, be unsatisfactory forThen enter 5);Otherwise by Reactive-power control amount △ QDBe converted into control instruction and be issued to each SVC, complete SVC without
The control of work(;
5) SVC carries out the displacement of static reactive and dynamic reactive with capacitor, reactor:If voltage conditions in current transformer substation
Allow first to adjust SVC idle, then first directly increase and decrease SVC is idle to increase dynamic reactive nargin, and lower whorl is controlled according to opposite nothing
Work(regulation direction switched capacitor, reactor, so as to complete the displacement of static reactive and dynamic reactive;Otherwise it is transferred to 6);
6) first according to opposite Reactive-power control direction switched capacitor, reactor, to increase or decrease busbar voltage so that bus
Voltage possesses enough margins of safety, and SVC is idle for lower whorl control and regulation, so as to complete the displacement of static reactive and dynamic reactive.
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CN105720583B (en) * | 2016-04-13 | 2018-08-14 | 国电南瑞科技股份有限公司 | The lower ground joint debugging province that saves of least regulating amount constraint adjusts reactive command optimum allocation method |
CN106300383B (en) * | 2016-09-09 | 2019-08-06 | 中国南方电网有限责任公司电网技术研究中心 | 10kV distribution line comprehensive reactive power configuration method considering equipment response speed |
CN109103946B (en) * | 2018-07-20 | 2019-12-13 | 清华大学 | method for generating switching plan of capacitor bank of system for sending wind power out through flexible direct-current power grid |
CN110854870B (en) * | 2019-11-14 | 2022-08-12 | 国网江苏省电力有限公司电力科学研究院 | Bus voltage automatic correction control method considering static synchronous compensator |
CN112467753B (en) * | 2020-11-30 | 2023-05-26 | 广东电网有限责任公司梅州供电局 | Reactive power replacement method and device |
CN114006379B (en) * | 2021-11-25 | 2023-08-15 | 华北电力大学(保定) | Double-time-scale voltage control method based on dynamic-static reactive power replacement mechanism |
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