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

A SOD-PS-II-R, power system technology, applied in the direction of reducing/preventing power oscillation, circuit devices, AC network circuits, etc., can solve the problems of large amount of calculation and complicated operation steps.

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

[0007] The above-mentioned time-delay stability discrimination methods all need to scan the key eigenvalues ​​in the [0.1, 2.5] Hz low-frequency oscillation frequency range and close to the imaginary axis multiple times to judge the time-delay stability of the system. The operation steps are cumbersome and the amount of calculation Big

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

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[0082] 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.

[0083] 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.

[0084] Introducing communication time-lags during the modeling of real large-scale power systems. The time-dela...

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Abstract

The invention discloses a method for calculating the electromechanical oscillation mode of a time-delay power system based on an SOD-PS-II-R algorithm. The method comprises the following steps: establishing a time-delay power system model; discretizing the solver of the power system model by a pseudo-spectral method, and obtaining a discretized matrix of the solver of the time-delay power system model; 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 rotated discretized approximation matrix of the solver; by using a sequential method or a subspace method, finding a set number ofeigenvalues 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 of the time-delay power system model, which corresponds tothe 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 the SOD-PS-II-R algorithm, and SOD-PS-II-R is "Solution Operator Discretization-PesudoSpectrum II and Rotation" English abbreviation, Chinese meaning: solution operator pseudospectral discretization and rotation. Background technique [0002] The development of electric power science and technology has gradually increased the scale of interconnected power systems, and the problem of interval low-frequency oscillation has become increasingly prominent. Traditionally, the installation of Power System Stabilizer (PSS) is used to solve the problem of low-frequency oscillation, but the source of its feedback control signal is usually far away, so it cannot effectively suppress the interval oscillation of the interconnected power system. [0003] The emergence of Wide-Area...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 叶华张思聪刘玉田
Owner SHANDONG UNIV
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