A reactive power optimization method for UHVDC transmission-side power grid considering transient characteristics

Abstract

The invention belongs to the technical field of ultra-high voltage AC and DC power grid operation and reactive power optimization, and in particular relates to a reactive power optimization method for ultra-high voltage DC transmission-end power grids considering transient characteristics. Specifically, it relates to a grid reactive power optimization strategy including an ultra-high voltage direct current transmission system, especially a grid reactive power optimization strategy for an ultra-high voltage AC transmission system considering transient characteristics. The invention includes: obtaining the operation parameters of the UHVDC transmission-end power grid; establishing a reactive power optimization model of the UHVDC transmission-end power grid considering the constraints of transient characteristics; determining the operation mode of the UHVDC transmission-end power grid; The model is solved; the reactive power optimization control scheme of the UHV DC transmission end power grid is obtained. The invention truly reflects the reactive power dynamic characteristics of the UHV DC transmission end power grid, obtains sufficient and accurate steady-state operation mode data and reactive power optimization strategies, makes the UHV DC transmission end power grid more stable, facilitates commercial development, and meets market demands. and commercial development prospects are good.

Description

technical field [0001] The invention belongs to the technical field of ultra-high voltage AC and DC power grid operation and reactive power optimization, and in particular relates to a reactive power optimization method for ultra-high voltage DC transmission-end power grids considering transient characteristics. Specifically, it relates to a grid reactive power optimization strategy including an ultra-high voltage DC transmission system, especially a grid reactive power optimization strategy for an ultra-high voltage AC transmission system considering transient characteristics. Background technique [0002] my country's primary energy and load are distributed inversely. In order to meet the urgent needs of clean energy transmission, load center power supply, energy conservation and emission reduction, State Grid vigorously develops UHV AC and DC technologies suitable for long-distance and large-capacity power transmission. The positioning of UHV AC and DC transmission projec...

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Problems solved by technology

[0004] The optimal control of reactive power and voltage is an important part of grid voltage operation. There have been many research results and practical methods. The coupling relationship between the operating characteristics, and the transient voltage constraint affects the voltage operation of the UHV DC grid, so the traditional reactive power and voltage optimization control method is not suitable for the UHV DC transmission grid that contains a large amount of new energy such as wind power.

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