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Method for simplifying relative gain matrix (RGA) calculation in flexible alternating-current/direct-current electricity transmission system

A power transmission system, AC and DC technology, applied in the direction of computing, electrical digital data processing, special data processing applications, etc., can solve the problems of complicated program implementation, unsuitable high-dimensional power grid model RGA calculation, high calculation cost, etc.

Active Publication Date: 2012-02-15
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for simplifying the calculation of RGA in the flexible AC-DC power transmission system, to solve the problem of node elimination in the balance equation of the flexible AC-DC power transmission system model in the prior art so as to obtain the transfer function, and then here Based on the RGA calculation of the flexible AC-DC transmission system model, the calculation cost is high, the implementation program is complicated, and it is not suitable for the RGA calculation of the high-dimensional grid model

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  • Method for simplifying relative gain matrix (RGA) calculation in flexible alternating-current/direct-current electricity transmission system
  • Method for simplifying relative gain matrix (RGA) calculation in flexible alternating-current/direct-current electricity transmission system
  • Method for simplifying relative gain matrix (RGA) calculation in flexible alternating-current/direct-current electricity transmission system

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[0039] In order to make the objectives, technical solutions and advantages of the present invention more clear and definite, the following examples are given to further describe the present invention in detail.

[0040] The basic flow of method among the present invention is as follows:

[0041] Step A: Construct the mathematical model of the flexible AC / DC transmission system:

[0042] dx dt = f ( x , y , u ) . . . ( 1 )

[0043] g(x,y,u)=0…………(2)

[0044] Equation (1) is a differential equation describing the dynamics of each component of the system, including the dynamics of the generator and its excitation system and FACTS device; Equation (2) is an algebraic equation describing the voltage and current relationship of each node of the n...

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Abstract

The invention discloses a method for simplifying relative gain matrix (RGA) calculation in a flexible alternating-current / direct-current electricity transmission system. The method comprises the following steps of: linearizing a differential algebra equation set in a flexible alternating-current / direct-current electricity transmission system model, obtaining a transfer function by a simplified matrix operation and performing the RGA calculation on the basis of the transfer function. In the method, although more linearized coefficient matrix elements are formed, the problem of complex matrix element expression caused by multiple times of matrix inversion is solved; and the method can be implemented by programs easily, the operating rate is improved, the technical cost and requirement on operating environment are reduced, and the method is suitable for high-dimension flexible alternating-current / direct-current electricity transmission system.

Description

technical field [0001] The invention relates to a method for calculating RGA in a flexible AC / DC power transmission system, in particular to a method for simplifying RGA calculation in a flexible AC / DC power transmission system. Background technique [0002] The flexible AC transmission system introduces modern power electronics technology and modern automatic control technology into the AC-DC transmission system to improve the controllability, flexibility, operation stability and economy of the original AC-DC transmission system. The modern power electronic technology and modern automatic control technology are flexible AC transmission technology, that is, FACTS (Flexible AC Transmission) device is installed in the traditional power transmission system. However, studies have shown that there is an interaction between different control loops of the FACTS device, and this interaction has a relatively large negative effect on its own control effect and system stability. There...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 王奇董萍王海军徐新乐李妍红朱坚徐良德唐金昆
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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