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Method and system for updating coordination constraint limits in plant-station coordinated automatic voltage control

A technology of automatic voltage and update method, applied in AC network voltage adjustment, load forecasting in AC network, electrical components, etc.

Active Publication Date: 2016-06-22
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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  • Application Information

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Problems solved by technology

[0004] The invention provides a method and system for updating the coordination constraint limit value in the coordinated automatic voltage control of the plant and station, which can solve the real-time update problem of the continuous variable of the power plant and the discrete variable of the substation coordinated control constraint limit value in the automatic voltage control

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specific Embodiment

[0084] In order to facilitate the understanding of the present invention, a specific embodiment is set forth below

[0085] This specific embodiment is for a 500kV power plant and an adjacent 500kV hub substation to update the coordination constraint limits in real time. The voltage levels of the low-voltage side are 500kV, 220kV, and 35kV. There is one transformer running, one 500kV bus running, the voltage is 532kV, the upper limit is 542kV, the lower limit is 530kV, and the capacitor reactor is installed on one 35kV bus. , the load is connected to a 220kV busbar.

[0086] According to the electrical connection relationship, through topology search, automatically form such as image 3 The simplified equivalent model shown. Based on the formed simplified equivalent model, this specific embodiment performs the update of the coordination constraint limit in the plant-station coordinated automatic voltage control according to the following process.

[0087] 1) When the reacti...

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Abstract

The invention provides a coordinated constraint limiting value updating method and system in factory station coordination automatic voltage control. The method includes the following steps that the reactive power value on the main transformer low-voltage side of a substation is collected, and the reactive situation on the main transformer low-voltage side of the substation is determined according to the reactive power value; the corresponding relation between the loading state and time frame of the substation is obtained, and the current loading state of the substation is determined according to the corresponding relation and the time frame of the present moment; the coordinated constraint limiting value in the factory station coordination automatic voltage control is updated according to the reactive situation and the current loading state of the substation, and the problem of real-time updating of the factory station coordination constraint limiting value in the automatic voltage control can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of automatic voltage control of power systems, in particular to a method and system for updating coordination constraint limits in coordinated automatic voltage control of power plants and stations. Background technique [0002] The Automatic Voltage Control (AVC, AutomaticVoltageControl) system is an important means to realize grid security (increase voltage stability margin), economy (reduce network loss), and high-quality (increase voltage pass rate) operation. Its control means include continuous variables (power plant Generator reactive power on the substation side) and discrete variables (capacitance, reactance, on-load tap changer taps (OLTCs) on the substation side), automatic voltage control is essentially to coordinate these control variables to meet a reasonable reactive voltage distribution the process of. This involves how to realize the coordinated control of continuous variables and discrete ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12
CPCG16Z99/00H02J3/00H02J3/001H02J3/003
Inventor 伍双喜杨银国汤磊李力林建熙刘俊磊王志南章平
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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