CN108899940A - A kind of second level power plant control method of AVC - Google Patents
A kind of second level power plant control method of AVC Download PDFInfo
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- CN108899940A CN108899940A CN201810746498.4A CN201810746498A CN108899940A CN 108899940 A CN108899940 A CN 108899940A CN 201810746498 A CN201810746498 A CN 201810746498A CN 108899940 A CN108899940 A CN 108899940A
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- voltage
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
-
- 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
-
- 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
Abstract
The invention discloses the second level power plant control methods of AVC a kind of, include the following steps：S1 obtains sensitivity matrix of the node voltage about reactive power according to the expansion power flow equation of the whole network, and the secondary voltage control model of power plant's Optimal Reactive Power control strategy is established according to the sensitivity matrix of acquisition；S2 solves secondary voltage control model, then obtains corresponding control strategy according to the result of solution, and is handed down to the substation AVC；The substation S3, AVC carries out voltage control according to the corresponding control strategy of selection.This method can power grid security, economy and it is high-quality between effectively coordinated.
Description
Technical field
The present invention relates to field of power system control, in particular to the second level power plant control method of a kind of AVC.
Background technique
The voltage of electric system controls, and is to ensure power grid security reliability service, improves the important means of system economy.Point
Step voltage is controlled from the 1970s by Electricite De France (EDF) in proposition, by Italy, Belgium, Spain etc.
State uses.It interconnects with the expansion of the system scale and extensively, the development of Computers and Communication technology, the most of region electricity in China
Net and provincial power network have built automatic voltage control system (Automatic Voltage Control, AVC).AVC system is
It is closed automatically based on modern power network SCADA (data acquisition and supervisor control) and the voltage of EMS system (Energy Management System)
Ring control, basic principle be by coordinating the idle control means such as the idle power output of power grid control generator, reactive-load compensation equipment,
The voltage level of regulating system or hub node, to guarantee the safety and economy of Operation of Electric Systems.
AVC use hierarchical voltage control mode, wherein secondary voltage control (Secondary Voltage Control,
SVC) pilot nodes (Pilot Bus) voltage value assigned according to tertiary voltage control changes level-one with scheduled coordination law
The setting reference value of voltage controller, response cycle are tens of seconds to a few minutes.Power plant is as important reactive power/voltage control
Means are not only responsible for voltage adjustment, improve the distribution of System Reactive Power trend to reduce the task of network loss, and guarantee electric system
Working voltage stablize task, also require to retain in voltage control process Reactive Power Margin and the maintenance power plant of generating set abundance
Between idle power output balance degree.
At present much about the research of secondary voltage control, such as coordinated secondary voltage control (Coordinated
Secondary Voltage Control, CSVC), focus on reducing interregional idle coupling, holding area by reasonable subregion
The balance degree of interior voltage control precision and idle power output, but its coordination for being not involved with diversified forms between power plant.?
Under the conventional method of CSVC, all power plant are without distinguishing with regard to carrying out global optimization, accordingly even when all idle resources can be concentrated
By the control of hub node voltage in setting value, it can also make the idle output distribution of power plant uneven, so that part generator is transported
Row lacks sufficient Reactive Power Reserve nargin under severe operating condition.
Summary of the invention
The object of the present invention is to provide the second level power plant control method of AVC a kind of, this method can be in power grid security, economy
And it is high-quality between effectively coordinated.
In order to achieve the goal above, the present invention is achieved by the following technical solutions：
A kind of second level power plant control method of AVC, its main feature is that, include the following steps：
S1 obtains sensitivity matrix of the node voltage about reactive power according to the expansion power flow equation of the whole network, and according to
The sensitivity matrix of acquisition establishes the secondary voltage control model of power plant's Optimal Reactive Power control strategy；
S2 solves secondary voltage control model, then obtains corresponding control strategy according to the result of solution, and
It is handed down to the substation AVC；
The substation S3, AVC carries out voltage control according to the corresponding control strategy of selection.
The step S1 includes：
According to the expansion power flow equation of the whole network, sensitivity matrix of the node voltage about reactive power is obtained；
According to the sensitivity matrix of acquisition, the hub node and the control on high-tension side busbar voltage of generator of SCADA acquisition
Actual value and tertiary voltage control issue the voltage reference value of hub node, establish the secondary voltage control of idle control strategy
Simulation, the secondary voltage control model are：
Wherein, VpFor maincenter bus current voltage,Voltage, C are set for the maincenter bus in regiongFor maincenter bus
Reactive voltage sensitivity matrix, Δ QgFor the regulated quantity of generator reactive power output, WpAnd WqFor weight coefficient, α is gain coefficient,
ΘgFor Reactive Power Margin vector, i-th of component is
Wherein, QgiFor the current idle power output of generator i, Δ QgiFor the regulated quantity of the idle power output of generator i,
For the idle maximum value of generator i,For the idle minimum value of generator i, i is the serial number of generator, | | Θg||2It is idle
Nargin vector set.
It further include to one constraint condition of secondary voltage control model specification in the step S1：
Wherein, CvgFor high-voltage side bus reactive voltage sensitivity matrix, VHIndicate the current electricity of generator high-voltage side bus
Pressure,Respectively indicate maincenter busbar voltage lower limit and maincenter bus voltage upper limit；WithRespectively indicate hair
Motor is idle lower limit and the idle upper limit；WithRespectively indicate generator high-voltage side bus lower voltage limit,
The single step maximum adjustment amount of upper voltage limit and permission, VdcFor the busbar voltage current value of change of current bus.
The step S2 is specifically included：Using active set algorithm to the quadratic programming problem of secondary voltage control model
It is solved, obtains Δ QgAfterwards, sensitivity matrix is recycled to be converted into the adjustment amount Δ of high-pressure power plant side bus voltage setting value
VH, issued as control strategy.
The step S3 includes：
The idle adjustable strategies of selection are issued to the substation AVC in the form of generator reactive adjustment amount；
The substation AVC converts generator reactive adjustment amount to the voltage reference value adjustment amount of generator generator terminal, then basis
Voltage reference value adjustment amount after conversion modifies field regulator parameter, to realize voltage control.
Compared with prior art, the present invention having the following advantages that：
This method can power grid security, economy and it is high-quality between effectively coordinated.
Detailed description of the invention
Fig. 1 is the illustraton of model of coordinated secondary voltage control in the present invention；
Fig. 2 is a kind of flow chart of the second level power plant control method of AVC of the present invention.
Specific embodiment
The present invention is further elaborated by the way that a preferable specific embodiment is described in detail below in conjunction with attached drawing.
As shown in FIG. 1, FIG. 1 is the illustratons of model of coordinated secondary voltage control (CSVC), wherein
Wherein, QgIndicate control generator currently idle power output, VgIndicate control generator generator terminal bus current voltage, Vp
Expression maincenter bus current voltage, VHIndicate the current voltage of generator high-voltage side bus.CgAnd CvgIt is full for sensitivity matrix
Foot：
ΔVp=CgΔQg
ΔVH=CvgΔQg
As shown in Fig. 2, and combine Fig. 1, then the second level power plant control method of AVC a kind of, includes the following steps：
S1 obtains sensitivity matrix of the node voltage about reactive power according to the expansion power flow equation of the whole network, and according to
The sensitivity matrix of acquisition establishes the secondary voltage control model of power plant's Optimal Reactive Power control strategy；
S2 solves secondary voltage control model, then obtains corresponding control strategy according to the result of solution, and
It is handed down to the substation AVC；
The substation S3, AVC carries out voltage control according to the corresponding control strategy of selection.
The step S1 includes：
According to the expansion power flow equation of the whole network, sensitivity matrix of the node voltage about reactive power is obtained；
According to the sensitivity matrix of acquisition, the hub node and the control on high-tension side busbar voltage of generator of SCADA acquisition
Actual value and tertiary voltage control issue the voltage reference value of hub node, establish the secondary voltage control of idle control strategy
Simulation, the secondary voltage control model are：
Wherein, VpFor maincenter bus current voltage,Voltage, C are set for the maincenter bus in regiongFor maincenter bus
Reactive voltage sensitivity matrix, Δ QgFor the regulated quantity of generator reactive power output, WpAnd WqFor weight coefficient, α is gain coefficient,
ΘgFor Reactive Power Margin vector, i-th of component is
Wherein, QgiFor the current idle power output of generator i, Δ QgiFor the regulated quantity of the idle power output of generator i,
For the idle maximum value of generator i,For the idle minimum value of generator i, i is the serial number of generator, | | Θg||2It is idle
Nargin vector set.
It further include to one constraint condition of secondary voltage control model specification in the step S1：
Wherein, CvgFor high-voltage side bus reactive voltage sensitivity matrix, VHIndicate the current electricity of generator high-voltage side bus
Pressure,Respectively indicate maincenter busbar voltage lower limit and maincenter bus voltage upper limit；WithRespectively indicate hair
Motor is idle lower limit and the idle upper limit；WithRespectively indicate generator high-voltage side bus lower voltage limit,
The single step maximum adjustment amount of upper voltage limit and permission, VdcFor the busbar voltage current value of change of current bus.
The step S2 is specifically included：Using active set algorithm to the quadratic programming problem of secondary voltage control model
It is solved, obtains Δ QgAfterwards, sensitivity matrix is recycled to be converted into the adjustment amount Δ of high-pressure power plant side bus voltage setting value
VH, issued as control strategy.
This project chooses the idle power output adjustment amount Δ Q of control generatorgAs optimized variable, this is primarily for following original
Cause：
From the point of view of the process of reactive power/voltage control, play essential is the idle power output of generator, therefore is directly selected
It uses it as the more acurrate description practical problem of control variable energy and common habit is consistent.
It is articulated in same bus due to often occurring the more close generators of parameter in practical engineering applications, they
Idle power output is essentially identical to the sensitivity of other node voltages, and which results in sensitivity matrix close to unusual, secondary in solution
It meets difficulty when planning problem.Select Δ QgAs control variable, clearly more can be generated electricity side by side using principle of stacking
The control action of machine is equivalent to the control action of wherein a certain generator, to guarantee to obtain reversible sensitivity matrix.
It selects the idle power output of generator as optimized variable, necessity can be carried out to it more easily in objective function
Coordination.
The step S3 includes：
The idle adjustable strategies of selection are issued to the substation AVC in the form of generator reactive adjustment amount；
The substation AVC converts generator reactive adjustment amount to the voltage reference value adjustment amount of generator generator terminal, then basis
Voltage reference value adjustment amount after conversion modifies field regulator parameter, to realize voltage control.
In conclusion a kind of second level power plant control method of AVC of the present invention, this method can power grid security, economy and
Effectively coordinated between high-quality.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (5)
1. the second level power plant control method of AVC a kind of, which is characterized in that include the following steps：
S1 obtains sensitivity matrix of the node voltage about reactive power according to the expansion power flow equation of the whole network, and according to acquisition
Sensitivity matrix establish the secondary voltage control model of power plant's Optimal Reactive Power control strategy；
S2 solves secondary voltage control model, then obtains corresponding control strategy according to the result of solution, and issue
Give the substation AVC；
The substation S3, AVC carries out voltage control according to the corresponding control strategy of selection.
2. the second level power plant control method of AVC as described in claim 1, which is characterized in that the step S1 includes：
According to the expansion power flow equation of the whole network, sensitivity matrix of the node voltage about reactive power is obtained；
According to the sensitivity matrix of acquisition, the hub node and the on high-tension side busbar voltage of control generator of SCADA acquisition are practical
Value and tertiary voltage control issue the voltage reference value of hub node, establish the secondary voltage control mould of idle control strategy
Type, the secondary voltage control model are：
Wherein, VpFor maincenter bus current voltage,Voltage, C are set for the maincenter bus in regiongIt is idle for maincenter bus
Voltage sensibility matrix, Δ QgFor the regulated quantity of generator reactive power output, WpAnd WqFor weight coefficient, α is gain coefficient,
ΘgFor Reactive Power Margin vector, i-th of component is
Wherein, QgiFor the current idle power output of generator i, Δ QgiFor the regulated quantity of the idle power output of generator i,For hair
The idle maximum value of motor i,For the idle minimum value of generator i, i is the serial number of generator, | | Θg||2For Reactive Power Margin
Vector set.
3. the second level power plant control method of AVC as claimed in claim 2, which is characterized in that further include in the step S1
To one constraint condition of secondary voltage control model specification：
Wherein, CvgFor high-voltage side bus reactive voltage sensitivity matrix, VHIndicate the current voltage of generator high-voltage side bus,Respectively indicate maincenter busbar voltage lower limit and maincenter bus voltage upper limit；WithRespectively indicate generator
Idle lower limit and the idle upper limit；WithRespectively indicate lower voltage limit, the voltage of generator high-voltage side bus
The single step maximum adjustment amount of the upper limit and permission, VdcFor the busbar voltage current value of change of current bus.
4. the second level power plant control method of AVC as claimed in claim 3, which is characterized in that the step S2 is specifically included：
It is solved using quadratic programming problem of the active set algorithm to secondary voltage control model, obtains Δ QgAfterwards, spirit is recycled
Sensitive matrix is converted into the adjustment amount Δ V of high-pressure power plant side bus voltage setting valueH, issued as control strategy.
5. the second level power plant control method of AVC as described in claim 1, which is characterized in that the step S3 includes：
The idle adjustable strategies of selection are issued to the substation AVC in the form of generator reactive adjustment amount；
The substation AVC converts generator reactive adjustment amount to the voltage reference value adjustment amount of generator generator terminal, then according to conversion
Voltage reference value adjustment amount afterwards modifies field regulator parameter, to realize voltage control.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429266A (en) * | 2018-02-05 | 2018-08-21 | 国电南瑞科技股份有限公司 | Continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold |
| CN109361242A (en) * | 2018-12-24 | 2019-02-19 | 国网北京市电力公司 | A kind of photovoltaic power generation automatic voltage control method |
| CN110365023A (en) * | 2019-06-12 | 2019-10-22 | 国网河南省电力公司 | A kind of automatic voltage control method considering bulk power grid stable voltage control limit value |
| CN111555288A (en) * | 2020-04-10 | 2020-08-18 | 国网电力科学研究院有限公司 | Track sensitivity-based secondary voltage control method and system for power system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375513A (en) * | 2015-11-06 | 2016-03-02 | 国家电网公司 | Automatic 110kV wind power field voltage control method based on real-time online equivalence |
| CN105515010A (en) * | 2015-12-30 | 2016-04-20 | 中国南方电网有限责任公司 | Cooperative game-based secondary voltage coordination control method and system |
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2018
- 2018-07-09 CN CN201810746498.4A patent/CN108899940A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375513A (en) * | 2015-11-06 | 2016-03-02 | 国家电网公司 | Automatic 110kV wind power field voltage control method based on real-time online equivalence |
| CN105515010A (en) * | 2015-12-30 | 2016-04-20 | 中国南方电网有限责任公司 | Cooperative game-based secondary voltage coordination control method and system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429266A (en) * | 2018-02-05 | 2018-08-21 | 国电南瑞科技股份有限公司 | Continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold |
| CN108429266B (en) * | 2018-02-05 | 2021-05-07 | 国电南瑞科技股份有限公司 | Continuous and discrete reactive power source coordination control method based on dynamic coordination boundary threshold |
| CN109361242A (en) * | 2018-12-24 | 2019-02-19 | 国网北京市电力公司 | A kind of photovoltaic power generation automatic voltage control method |
| CN109361242B (en) * | 2018-12-24 | 2021-02-26 | 国网北京市电力公司 | Automatic voltage control method for photovoltaic power generation |
| CN110365023A (en) * | 2019-06-12 | 2019-10-22 | 国网河南省电力公司 | A kind of automatic voltage control method considering bulk power grid stable voltage control limit value |
| CN111555288A (en) * | 2020-04-10 | 2020-08-18 | 国网电力科学研究院有限公司 | Track sensitivity-based secondary voltage control method and system for power system |
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Application publication date: 20181127 |