CN109217322A - The method of the stability and economy of electric system is improved using fixed reactive limit value method - Google Patents
The method of the stability and economy of electric system is improved using fixed reactive limit value method Download PDFInfo
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- CN109217322A CN109217322A CN201811291601.7A CN201811291601A CN109217322A CN 109217322 A CN109217322 A CN 109217322A CN 201811291601 A CN201811291601 A CN 201811291601A CN 109217322 A CN109217322 A CN 109217322A
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- avc
- limit value
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A method of the stability and economy being improved electric system using fixed reactive limit value method are belonged to power grid and manage field.Situations such as it, which passes through, optimizes AVC control strategy, and abnormal obliteration out-of-limit for the number occurred in AVC operational process, by analysing and comparing to the operation datas curve such as busbar voltage, main transformer is idle, on-load voltage regulation gear, determines the real causes of AVC defect；Fixed reactive limit value method is taken to the control mode selection of AVC, a pair of fixed idle upper lower limit value is manually set, is preferentially thrown in the case where idle insufficient or excessive and jumps capacitor, operating parameter is made to restore normal range (NR).The technical program improves the Operating ettectiveness of AVC system, further improve the controlled level of voltage power-less, ensure power network safety operation, it ensure that the qualification of interdependent node voltage and power factor, farthest reduce the idle transmission of route, reduces power grid active loss because of caused by unnecessary reactive power flow.It is widely portable to dispatching of power netwoks control field.
Description
Technical field
The invention belongs to power grid control field more particularly to a kind of stability and economy for improving electric system
Method.
Background technique
Power grid automatic voltage control system (Automatic Voltage Control, abbreviation AVC) is by electric system
In the data such as each node remote measure and communication carry out on-line analysis and calculating, realize the optimal control to voltage and reactive-load compensation equipment,
So that the control amounts such as the transmission of rate of qualified voltage, reactive power, power factor meet boundary condition, improve the operation feelings of electric system
Condition reduces line loss, improves the stability and economy of electric system.
Power grid automatic voltage control system (AVC) major function is guaranteed under the premise of ensuring power network safety operation
Voltage and critical point power factor are qualified, caused by reducing the idle transmission of route as far as possible, reducing power grid because of unnecessary reactive power flow
Active loss.
Automatic voltage control system carries out centralized watch and analytical calculation to the whole network reactive voltage state, from global angle
Coordination optimization control is carried out to the electric network reactive-load device of wide area dispersion, system voltage stabilization is to maintain, promotes network voltage quality
With the important technical of whole system economic operation level, raising Reactive Voltage Management level.
Area power grid AVC system is expansion of the master station automation advanced applied software technology to closed-loop control direction.Pass through
Complete high-speed power data communication network can be acquired in control centre and include using the SCADA application function of main station system
Real time information including busbar voltage, generator output, Line Flow, switch tool etc., and can be complete in a control centre distant place
At the remote control remote regulating operation such as the adjustment of generator reactive power output, the lifting of capacity reactance device switching, load tap changer.
The regulating measure of AVC is to adjust on-load regulator transformer tap and capacitor switch, makes voltage and idle satisfaction
Condition.It is measured by node each in monitoring system, advises to system or control.The overall principle is voltage first, when pressure regulation
It takes into account idle, makes system voltage in limits, power control is in qualified, idle in-situ balancing of respectively standing.AVC controls plan
It slightly include region voltage strategy, busbar voltage strategy, region is idle strategy, single idle strategy of standing, control flow is as shown in Figure 1.
Certain regional power grid belonging to applicant is in the online debugging process of AVC, it was found that following FAQs:
One, AVC is frequently latched: for equipment in protection operation, preventing incorrect control command from causing to damage to controlled device
Evil, AVC can be by device latchup and automatic trigger generates AVC alarm signal.
In actual operation, AVC abnormality alarming latch status it is general there are two types of: the movement time of loaded switch/capacitor switch
Number is out-of-limit；The tripping twice of loaded switch/capacitor switch, the reason of causing number out-of-limit or tripping twice, are varied, need
It is made a concrete analysis of according to different situations.
Two, operation data occur under nominal situation repeatedly out-of-limit: there are mainly two types of the reasons for causing operation data out-of-limit, and one
It is the regulating power that operating condition exceeds control system, second is that control strategy is not suitable with carrying out practically condition.
How to solve the above problems, becomes problem anxious to be resolved in real work.
Summary of the invention
The steady of electric system is improved using fixed reactive limit value method technical problem to be solved by the invention is to provide a kind of
Qualitative and economy method.AVC control strategy is optimized in it, improves the Operating ettectiveness of AVC system, further changes
The controlled level of voltage power-less has been apt to it, it is ensured that power network safety operation ensure that interdependent node voltage and power factor
Qualification farthest reduces the idle transmission of route, reduces power grid active loss because of caused by unnecessary reactive power flow.
The technical scheme is that providing a kind of stability and warp for improving electric system using fixed reactive limit value method
The method of Ji property, it is characterized in that: by optimization AVC control strategy, it is out-of-limit and abnormal for the number occurred in AVC operational process
Situations such as locking, by analysing and comparing to the operation datas curve such as busbar voltage, main transformer is idle, on-load voltage regulation gear, really
Determine the real causes of AVC defect.
Specifically, the method, according to system correlation operation data optimization of profile AVC control strategy.
Further, the optimization AVC control strategy in some cases for original control strategy will cause
Main transformer tap changer is acted prior to capacitor switch, causes reactive compensation insufficient or overcompensation；And main transformer tap changer frequently moves
The problem of causing locking takes fixed reactive limit value method to the control mode selection of AVC, and artificial settings a pair is fixed idle
Upper lower limit value is preferentially thrown in the case where idle insufficient or excessive and jumps capacitor, operating parameter is made to restore normal range (NR).
Method described in the technical program improves the Operating ettectiveness of AVC system, further improves the control of voltage power-less
System is horizontal, it is ensured that power network safety operation ensure that the qualification of interdependent node voltage and power factor, farthest subtract
Lack the idle transmission of route, reduces power grid active loss because of caused by unnecessary reactive power flow.
Method described in the technical program collects power grid Nei Ge substation's on-load voltage regulating device and reactive-load compensation equipment
Middle monitoring, unified management and on-line checking can greatly improve the voltage controlled level of dispatching of power netwoks or regulation person, mitigate and adjust repeatedly
The labor intensity of pressure improves idle, voltage management efficiency.
Compared with the prior art, the invention has the advantages that
1. improving the Operating ettectiveness of AVC system, the controlled level of voltage power-less is further improved, it is ensured that power grid peace
Full stable operation, ensure that the qualification of interdependent node voltage and power factor, farthest reduce the idle transmission of route, drop
Low power grid active loss because of caused by unnecessary reactive power flow.
2. by using the technical program, regulation center AVC application level has a raising of matter, supply voltage qualification rate and
Idle controlled level has also reached new height.
Detailed description of the invention
Fig. 1 is existing AVC control flow chart schematic diagram；
Fig. 2 is AVC defect processing flow diagram of the present invention.
Specific embodiment
The present invention will be further described below.
Technical solution of the present invention provides a kind of stability and warp that electric system is improved using fixed reactive limit value method
The method of Ji property, inventive point are:
By optimizing AVC control strategy, situations such as and abnormal obliteration out-of-limit for the number occurred in AVC operational process,
By analysing and comparing to the operation datas curve such as busbar voltage, main transformer is idle, on-load voltage regulation gear, AVC defect is determined
Real causes.
Method described in it, according to system correlation operation data optimization of profile AVC control strategy.
Further, the optimization AVC control strategy in some cases for original control strategy will cause
Main transformer tap changer is acted prior to capacitor switch, causes reactive compensation insufficient or overcompensation；And main transformer tap changer frequently moves
The problem of causing locking takes fixed reactive limit value method to the control mode selection of AVC, and artificial settings a pair is fixed idle
Upper lower limit value is preferentially thrown in the case where idle insufficient or excessive and jumps capacitor, operating parameter is made to restore normal range (NR).
Method described in the technical program collects power grid Nei Ge substation's on-load voltage regulating device and reactive-load compensation equipment
Middle monitoring, unified management and on-line checking can greatly improve the voltage controlled level of dispatching of power netwoks or regulation person, mitigate and adjust repeatedly
The labor intensity of pressure improves idle, voltage management efficiency.
Method described in the technical program improves the Operating ettectiveness of AVC system, further improves the control of voltage power-less
System is horizontal, it is ensured that power network safety operation ensure that the qualification of interdependent node voltage and power factor, farthest subtract
Lack the idle transmission of route, reduces power grid active loss because of caused by unnecessary reactive power flow.
Optimization AVC control strategy in technical solution of the present invention is described below:
Situations such as and abnormal obliteration out-of-limit for the number occurred in AVC operational process, by busbar voltage, main transformer without
The operation datas curves such as function, on-load voltage regulation gear are analysed and compared, and determine the real causes of AVC defect.
The reason of causing AVC defect substantially has at following 4 points: 1, primary equipment failure；2, secondary device failure；3, remote signalling
Telemetering failure；4, AVC control strategy is not applicable.Wherein, it is according to system correlation operation data optimization of profile AVC control strategy
The difficult point of AVC defect elimination processing, table 1 are AVC relevant control mode.
1 AVC control mode of table
Original control strategy is power factor calculating method, is converted into nothing by power factor limit value and current active power
Function control limit will cause main transformer tap changer and act prior to capacitor switch in some cases, cause reactive compensation insufficient
Or overcompensation；And main transformer tap changer frequent movement causes to be latched.
Selection takes fixed reactive limit value method that can preferentially throw in the case where idle insufficient or excessive in this case
Capacitor is jumped, operating parameter is made to restore normal range (NR).
The implementation of technical solution of the present invention improves the Operating ettectiveness of AVC system, further improves the control of voltage power-less
System is horizontal, it is ensured that power network safety operation ensure that the qualification of interdependent node voltage and power factor, farthest subtract
Lack the idle transmission of route, reduces power grid active loss because of caused by unnecessary reactive power flow；By using this technology side
Case improves the Operating ettectiveness of AVC system, further improves electricity so that the operational failure of AVC system is greatly lowered extremely
Press idle controlled level, it is ensured that power network safety operation ensure that the qualification of interdependent node voltage and power factor, most
Reduce the idle transmission of route to big degree, reduces power grid active loss because of caused by unnecessary reactive power flow.
In addition, carrying out Centralized Monitoring, unified management to power grid Nei Ge substation's on-load voltage regulating device and reactive-load compensation equipment
And on-line checking, the labor intensity that can be greatly improved regulation person's voltage controlled level, mitigate pressure regulation repeatedly improve idle, electric
Press the efficiency of management.
It invention can be widely used in dispatching of power netwoks control field.
Claims (5)
1. a kind of method for the stability and economy for improving electric system using fixed reactive limit value method, it is characterized in that: passing through
Situations such as optimization AVC control strategy, and abnormal obliteration out-of-limit for the number occurred in AVC operational process, by bus electricity
The operation datas curve such as pressure, main transformer is idle, on-load voltage regulation gear is analysed and compared, and determines the real causes of AVC defect.
2. described in accordance with the claim 1 improve the stability of electric system and the side of economy using fixed reactive limit value method
Method, it is characterized in that the method for the stability and economy that electric system is improved using fixed reactive limit value method, according to system
Related operation data optimization of profile AVC control strategy.
3. described in accordance with the claim 1 improve the stability of electric system and the side of economy using fixed reactive limit value method
Method, it is characterized in that the method for the stability and economy that electric system is improved using fixed reactive limit value method, using optimization
It is dynamic prior to capacitor switch in some cases for original control strategy to will cause main transformer tap changer for AVC control strategy
Make, causes reactive compensation insufficient or overcompensation；And main transformer tap changer frequent movement causes the problem of locking, the control to AVC
Mode selects to take fixed reactive limit value method, and a pair of fixed idle upper lower limit value is manually set, in idle deficiency or excessively
In the case of preferentially throw jump capacitor, make operating parameter restore normal range (NR).
4. described in accordance with the claim 1 improve the stability of electric system and the side of economy using fixed reactive limit value method
Method, it is characterized in that the method for the stability and economy for improving electric system using fixed reactive limit value method, improves AVC
The Operating ettectiveness of system further improves the controlled level of voltage power-less, it is ensured that power network safety operation ensure that phase
The qualification of artis voltage and power factor farthest reduces the idle transmission of route, reduces power grid because of unnecessary nothing
Active loss caused by function trend.
5. described in accordance with the claim 1 improve the stability of electric system and the side of economy using fixed reactive limit value method
Method, it is characterized in that the method for the stability and economy that electric system is improved using fixed reactive limit value method, in power grid
Each substation's on-load voltage regulating device and reactive-load compensation equipment carry out Centralized Monitoring, unified management and on-line checking, can greatly improve
The voltage controlled level of dispatching of power netwoks or regulation person, the labor intensity for mitigating pressure regulation repeatedly improve idle, voltage management efficiency.
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| CN201811291601.7A CN109217322A (en) | 2018-10-31 | 2018-10-31 | The method of the stability and economy of electric system is improved using fixed reactive limit value method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050580A (en) * | 2021-11-10 | 2022-02-15 | 许继集团有限公司 | Voltage regulation method and device for regional-level hundred-percent new energy power system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201691A (en) * | 2014-08-06 | 2014-12-10 | 国网上海市电力公司 | Method and system for controlling reactive power optimization |
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- 2018-10-31 CN CN201811291601.7A patent/CN109217322A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201691A (en) * | 2014-08-06 | 2014-12-10 | 国网上海市电力公司 | Method and system for controlling reactive power optimization |
Non-Patent Citations (1)
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| 李国伟: "智能电网调度主站D5000系统的应用研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050580A (en) * | 2021-11-10 | 2022-02-15 | 许继集团有限公司 | Voltage regulation method and device for regional-level hundred-percent new energy power system |
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