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Method for evaluating exchange capacity limit among large regional grids based on multiple restrictions

A technology for switching capacity and large-area power grids, which is applied to electrical components, circuit devices, and AC and DC network circuit layouts, and can solve problems such as the inability to qualitatively and quantitatively calculate the limit of switching capacity

Active Publication Date: 2013-06-26
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, based on the traditional off-line simulation calculation and analysis method, it is impossible to qualitatively and quantitatively calculate the exchange capacity limit that the receiving end system can withstand. It is necessary to find a new analysis method that can reflect the dynamic adjustment characteristics of the system as the exchange capacity changes and its changing trend.

Method used

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  • Method for evaluating exchange capacity limit among large regional grids based on multiple restrictions
  • Method for evaluating exchange capacity limit among large regional grids based on multiple restrictions
  • Method for evaluating exchange capacity limit among large regional grids based on multiple restrictions

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Embodiment Construction

[0036] The present invention comprises following four major steps:

[0037] (1) By identifying and predicting the frequency response characteristic coefficient of the power system, the capacity exchange capability between large-scale power grids is evaluated on the basis of the analysis of the frequency response characteristics, and the effective disturbance is taken as the index of the overall capacity change range based on the transient energy function analysis constraint.

[0038] A specific scheme for evaluating the limit of switching capacity based on frequency response characteristics is as follows:

[0039] (1) Use the least squares method to fit the curve of the frequency response characteristic coefficient with the gradual active power disturbance obtained from the simulation under different switching capacity operation modes, and obtain the frequency response characteristic coefficient-active power disturbance curve.

[0040] (2) According to the fitted frequency re...

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Abstract

The invention discloses a method for evaluating exchange capacity limit among large regional grids based on multiple restrictions. The method comprises the steps of: evaluating the capacity exchange ability among the large regional grids based on frequency response characteristic analysis, static voltage stability analysis, and transient energy function analysis; comparing exchange capacity limits meeting the restrictions of the frequency response characteristic, static voltage stability and a transient energy function to determine determinant factors restricting the capacity exchange ability of a power system; determining the exchange capacity limits among the large regional grids based on the multiple restrictions; and making and optimizing a regional capacity assignment plane based on the exchange capacity limits.

Description

technical field [0001] The invention belongs to the field of safe technical operation of electric power systems, and more specifically relates to a method for assessing the limit of exchange capacity between large-area power grids based on multiple constraints. Background technique [0002] During the "Twelfth Five-Year Plan" period, with the gradual completion of the "Sanhua" UHV power grid, the large-capacity power exchange between the North China, Central China and East China power grids will have an impact on the safety and stability of the "Sanhua" UHV power grid. Among them, the Central China Power Grid is the landing point of the North China-Central China UHV AC interconnection system, and at the same time as the starting point of the Central China-East China UHV AC / DC hybrid interconnection system, there is a large capacity of grid power. The transmission section between large regional power grids has large transmission capacity and long transmission distance. Once t...

Claims

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Application Information

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IPC IPC(8): H02J4/00
Inventor 黄涌刘涤尘吴军董飞飞赵红生赵一婕潘旭东王浩磊
Owner STATE GRID CORP OF CHINA
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