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Reactive replacement method for extra-high voltage converter station phase modifier and near-zone power plant in power grid

A UHV and converter station technology, applied in AC network voltage adjustment, circuit devices, reactive power compensation, etc., can solve problems such as power grid stability impact

Active Publication Date: 2020-10-20
NORTHWEST BRANCH OF STATE GRID POWER GRID CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the DC commutation failure and recovery process, a large amount of reactive power will be absorbed from the system. If the commutation failure leads to DC blocking, it will have an impact on the stability of the power grid

Method used

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  • Reactive replacement method for extra-high voltage converter station phase modifier and near-zone power plant in power grid
  • Reactive replacement method for extra-high voltage converter station phase modifier and near-zone power plant in power grid
  • Reactive replacement method for extra-high voltage converter station phase modifier and near-zone power plant in power grid

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Embodiment Construction

[0035] The reactive power replacement method of the UHV converter station regulator in the power grid and the power plant in the vicinity proposed by the present invention, its flow chart is as follows figure 1 As shown, the method includes the following steps:

[0036] (1) Set the automatic voltage control period as T c ;

[0037] (2) Obtain the grid network structure data from the grid dispatching system, and construct a regional grid model coordinated with the 500kV bus of the UHV converter station, denoted as

[0038]

[0039] in, Indicates that UHV converter stations and nearby areas participate in the coordinated control of 500kV power plants, with a total of N seats, Indicates that the UHV converter station and the nearby area participate in the coordinated control of the 500kV busbars participating in the coordinated control of the 500kV power plant, and there are a total of K 500kV busbars;

[0040] (3) In each automatic voltage control cycle T c When it a...

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Abstract

The invention relates to a reactive replacement method for an extra-high voltage converter station phase modifier and a near-zone power plant in a power grid, and belongs to the technical field of power grid dispatching. The invention discloses the reactive replacement method for the extra-high voltage converter station phase modifier and the near-zone power plant, a secondary voltage control region is established in the high-voltage direct-current converter station where the extra-high voltage converter station phase modifier is located and the near-region power grid according to the voltagecondition of AVC function input of the extra-high voltage converter station phase modifier, the switching logic between different excitation control modes is defined, the coordination control over theextra-high voltage converter station phase modifier and power plant reactive equipment is carried out on the area, enough reactive margin is reserved for the extra-high voltage converter station phase modifier, the static voltage stability margin of the power grid is improved, and therefore, the transient voltage stability level of the power grid is improved.

Description

technical field [0001] The invention relates to a reactive power replacement method for a condenser of an ultra-high voltage converter station in a power grid and a nearby power plant, and belongs to the technical field of power grid dispatching. Background technique [0002] Automatic voltage control (hereinafter referred to as AVC, Automatic Voltage Control) system is an important means to achieve safe (improved voltage stability margin), economical (reduced network loss), and high-quality (improved voltage qualification rate) operation of the transmission network. The AVC system architecture is based on the grid energy management system (EMS), which can use the real-time operation data of the transmission network to scientifically make the best reactive power and voltage adjustment plan from the perspective of overall optimization of the transmission network, and automatically send it to power plants, substations and subordinates The power grid dispatching organization ex...

Claims

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Application Information

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IPC IPC(8): H02J3/16H02J3/36H02J3/18
CPCH02J3/16H02J3/36H02J3/18H02J3/1885H02J2203/10H02J2203/20Y02E40/30Y02E60/60
Inventor 柯贤波程林牛拴保汤磊张振宇李小江霍超王鹏任冲张钢魏平王智伟卫琳
Owner NORTHWEST BRANCH OF STATE GRID POWER GRID CO
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