Method for judging stability of time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep)

A technology of power system and discrimination method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve problems such as the influence of time lag without consideration

Inactive Publication Date: 2018-07-03
SHANDONG UNIV
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  • Method for judging stability of time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep)
  • Method for judging stability of time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep)
  • Method for judging stability of time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep)

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[0146] 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.

[0147] 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.

[0148] Such as figure 1 As shown, the time-delay power system stability discrimination method based on IGD-LMS ...

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Abstract

The invention discloses a method for judging the stability of a time-delay power system based on IGD-LMS (Infinitesimal Generator Discretization Method with Linear Multistep). The method comprises steps of establishing a time-delay power system model; using a linear multi-step method LMS to discretize infinitesimal generators to obtain a discretization matrix of the infinitesimal generators; converting the eigenvalue problem of infinite dimensional into the eigenvalue problem of finite dimensional; calculating the approximate value of the eigenvalue with the largest inverse modulus of the discretization matrix of the infinitesimal generators by the implicit Arnoldi algorithm; performing sparse implementation using the displacement-inverse transformation and Kronecker products in the calculation process; according to the mapping relation, converting the approximate value of the eigenvalue with the largest inverse modulus of the discretization matrix of the infinitesimal generators intothe approximate value of the time-delay power system module; correcting the approximate value by using the Newton iteration method to obtain the accurate eigenvalue of the time-delay power system; anddetermining the stability of the time-delay power system according to the magnitude of the accurate eigenvalue.

Description

technical field [0001] The invention relates to a time-delay power system stability discrimination method based on an infinitesimal generator discretization (Infinitesimal Generator Discretization Method with Linear Multistep, IGD-LMS). Background technique [0002] With the rise of the Global Energy Internet, the scale of the interconnected power system is gradually increasing, and the problem of interval low-frequency oscillation is more significant. The traditional solution is to install a Power System Stabilizer (PSS). Because its feedback control signal comes from the local area, it can effectively solve the low-frequency oscillation problem between regions, but it cannot effectively damp the interval oscillation of the interconnected power system. [0003] The emergence of Wide-Area Measurement System (WAMS) has brought new opportunities for the development of stability analysis and control of large-scale interconnected power systems. The low-frequency oscillation con...

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IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 叶华李泰然刘玉田
Owner SHANDONG UNIV
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