Stability analyzing and optimizing method suitable for layering and zoning of ultra-high voltage electric network

Abstract

The invention relates to a stability analyzing and optimizing method suitable for layering and zoning of an ultra-high voltage electric network, and belongs to the field of safety of the ultra-high voltage electric network. The stability analyzing method comprises an improved short-circuiting current level calculating method and an ANFIS (adaptive neural fuzzy interference system)-based safety domain optimum trend analysis. The invention also provides a stability optimizing method suitable for the layering and zoning of the ultra-high voltage electric network, and the stability optimizing method comprises the following steps of establishing a reactive optimizing model based on a layering and zoning strategy, adopting an improved genetic algorithm, and the like. The stability analyzing and optimizing method has the advantages that the stability of a receiving-end electric network is analyzed and optimized by the improved short-circuiting current level calculating method, the ANFIS-based safety domain optimum trend analysis and a reactive compensation optimizing method based on the improved genetic algorithm; the safe and stable running of the electric network can be ensured, and a quantitative support and decision reference is provided for a power company when the layering and zoning planning of a receiving-end system accessed with the ultra-high voltage is made; and the method is a reliable analyzing and decision-making method, and considerable technical benefits, economic benefits and social benefits can be created.

Description

technical field [0001] The invention relates to a stability analysis and optimization method suitable for stratified partitions of UHV power grids, specifically including an improved short-circuit current level calculation method, and a security system based on Adaptive Neural Fuzzy Inference System (ANFIS) Domain optimal power flow analysis and reactive power compensation optimization method based on improved genetic algorithm belong to the field of UHV transmission grid security. Background technique [0002] By 2013, the typical operation mode of my country's planned UHV synchronous power grid is a "two vertical and one ring" structure, of which the "west vertical" is the UHV Mengxi station to Changsha station, and the "east vertical" is from Ximeng to Shanghai. The East China power grid is formed UHV ring network. The domestic UHV power grid has entered a stage of rapid development, and the backbone grid will gradually become a pattern of UHV power grid and 1000 / 500 / 220k...

AI Technical Summary

Problems solved by technology

However, the investment of these dynamic var devices will greatly increase the short-circuit capacity in the main network

And installed at the weak point of the voltage at the end of the power grid, the effect will be twice the result with half the effort

The root cause of the lack of dynamic reactive power in the current power grid is that the high-voltage power grid undertakes a large number of reactive power balancing tasks for the low-voltage power grid.

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