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A Coordinated Control Method and System for Secondary Voltages Based on Cooperative Countermeasures

A secondary voltage control and secondary voltage technology, applied in AC network voltage adjustment, system integration technology, information technology support system, etc., can solve problems such as uneven distribution of reactive power output and lack of reactive power reserve margin

Active Publication Date: 2018-11-02
CHINA SOUTHERN POWER GRID COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the traditional CSVC method, all power plants are optimized globally without distinction, so that even if all reactive resources can be concentrated to control the central node voltage at the set value, the reactive power output of the power plant will be distributed unevenly, making some The generator is running under harsh working conditions and lacks sufficient reactive power reserve margin

Method used

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  • A Coordinated Control Method and System for Secondary Voltages Based on Cooperative Countermeasures
  • A Coordinated Control Method and System for Secondary Voltages Based on Cooperative Countermeasures
  • A Coordinated Control Method and System for Secondary Voltages Based on Cooperative Countermeasures

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Embodiment 1

[0106] In order to overcome the disadvantages of deteriorating the operating conditions of some power plants due to the global optimization of all power plants equally, the present invention provides a voltage coordination control method based on cooperative countermeasures, which makes full use of the reactive power coupling between power plants and seeks The optimal combination among them is used for coordinated control, and based on the principle of individual rationality, while ensuring the accuracy of the voltage control of the central point, the sufficient reactive power reserve margin of the power plant is reserved, and the balance of the output of reactive power sources is maintained.

[0107] The specific implementation process of the voltage coordination control method proposed by the present invention is as follows:

[0108] 1) In the control center of the AVC main station, according to the topology information of the power grid, each power plant is defined as the co...

Embodiment 2

[0127] This embodiment takes the IEEE 39 node test system as an example to further describe the specific implementation process of the present invention. refer to image 3 and 4 , the specific implementation process of this embodiment includes:

[0128] 1) Obtain grid topology information, including network structure diagrams and power plant information, and determine all feasible ways of cooperation.

[0129] Such as image 3 As shown, there are ten power plant nodes in the IEEE 39 node test system. To simplify the description, this embodiment selects three power plants at nodes 30, 32, and 38 as the power plants participating in AVC voltage regulation. Each power plant is a rational subject participating in the cooperative strategy, using Plant i (i=1, 2, 3) means that all possible cooperation modes (that is, all alliance structures in which countermeasure subjects cooperate) are:

[0130]

[0131]

[0132]

[0133]

[0134]

[0135] in, acting individual...

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Abstract

The invention discloses a cooperative game-based secondary voltage coordination control method and system. The method includes the steps of: using a power plant participating in voltage control in a power grid as a rational countermeasure body, and enumerating all alliance structures with which the countermeasure body cooperates; for each alliance structure, according to an expansion power flow equation of the whole power grid, obtaining a sensitivity matrix of node voltage to reactive power, and establishing a secondary voltage control submodel of a power plant optimized reactive power control strategy in an alliance according to the sensitivity matrix that is obtained; solving the secondary voltage control submodel, and then according to a solved result, with a circumstance of discretely controlling all power plants being a standard, selecting an alliance structure that satisfies individual rationality from all the alliance structures as an optimal alliance structure; and selecting a reactive adjustment strategy of the countermeasure body under the optical alliance structure, and enabling an AVC substation to perform voltage control according to the selected reactive adjustment strategy. The cooperative game-based secondary voltage coordination control method provided by the invention has the advantages of good and reliable control effects, and can be widely applied to the field of electric power system control.

Description

technical field [0001] The invention relates to the field of power system control, in particular to a method and system for coordinated control of secondary voltages based on cooperative countermeasures. Background technique [0002] The voltage control of the power system is an important means to ensure the safe and reliable operation of the power grid and improve the system economy. The hierarchical voltage control was proposed by the French Electricity Company (EDF) in the 1970s, and has been adopted by Italy, Belgium, Spain and other countries. With the expansion of system scale and extensive interconnection, and the development of computer and communication technology, most of the regional power grids and provincial power grids in my country have built automatic voltage control systems (Automatic Voltage Control, AVC). The AVC system is based on the voltage automatic closed-loop control of modern power grid SCADA (data acquisition and monitoring control system) and EMS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12H02J3/16G06Q50/06
CPCG06Q50/06H02J3/12H02J3/16H02J2203/20Y02E40/30Y02E40/70Y04S10/50
Inventor 陈亦平郑晓东侯君陈皓勇孙雁斌莫琦莫维科梁彦杰黄丽颖
Owner CHINA SOUTHERN POWER GRID COMPANY
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