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Method for calculating electromechanical oscillation mode of time-delay power system based on low-order SOD-PS-II-R algorithm

A SOD-PS-II-R, power system technology, applied in the direction of reducing/preventing power oscillation, circuit device, AC network circuit, etc., can solve the problems of long calculation time, large amount of calculation, large matrix dimension, etc.

Active Publication Date: 2018-11-13
SHANDONG UNIV
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Problems solved by technology

[0008] In addition, the large matrix dimension of the existing method leads to a large amount of calculation and long calculation time when calculating the eigenvalues ​​of the power system

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  • Method for calculating electromechanical oscillation mode of time-delay power system based on low-order SOD-PS-II-R algorithm
  • Method for calculating electromechanical oscillation mode of time-delay power system based on low-order SOD-PS-II-R algorithm
  • Method for calculating electromechanical oscillation mode of time-delay power system based on low-order SOD-PS-II-R algorithm

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[0086] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0087] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0088] Such as figure 1 Shown: Introducing communication time-lags during the modeling of real large-scale powe...

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Abstract

The invention discloses a method for calculating the electromechanical oscillation mode of a time-delay power system based on a low-order SOD-PS-II-R algorithm. The method comprises the following steps: establishing a time-delay power system model; rewriting a mathematical model of the time-delay power system to realize order reduction of the dimension of the solver of the mathematical model; discretizing the solver of the time-delay power system model by a pseudo-spectral method to obtain a discretized matrix of the solver; by a coordinate rotation preprocessing method, rotating the discretized matrix of the solver and performing approximating to obtain the discretized approximation matrix of the solver, and calculating the eigenvalues whose modulus values are greater than 1 of the discretized approximation matrix of the solver; by using a sequential method or a subspace method, finding a set number of eigenvalues having the maximum modulus values of the discretized approximation matrix of the solver from the eigenvalues whose modulus values are greater than 1; and processing the set number of eigenvalues with the maximum modulus values by spectral mapping, coordinate anti-rotation and Newton's check, and finally obtaining an eigenvalue lambda of the time-delay power system model, wherein the eigenvalue lambda corresponds to the electromechanical oscillation mode of the time-delay power system.

Description

technical field [0001] The present invention relates to the technical field of power systems, in particular to a method for calculating electromechanical oscillation modes of time-delayed power systems based on low-order SOD-PS-II-R algorithms. SOD-PS-II-R stands for "Solution Operator Discretization-Pesudo Spectrum II and The English abbreviation of "Rotation", the Chinese meaning is: solution operator pseudo-spectrum discretization reduction and rotation. Background technique [0002] With the development of science and technology, especially the development of electric power science and technology, the scale of the interconnected power system is gradually increasing, and the problem of interval low-frequency oscillation is becoming more and more significant. The traditional way of installing a Power System Stabilizer (PSS), whose feedback control signal comes from the local area, cannot effectively suppress the interval oscillation of the interconnected power system. [...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 叶华张思聪刘玉田
Owner SHANDONG UNIV
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