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Delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization)

A technology of power system and analysis method, which is applied in the field of time-delay power system stability analysis based on the discretization of low-order explicit infinitesimal generators, and can solve problems such as reducing the dimension of the spectrum discretization matrix

Active Publication Date: 2018-10-12
SHANDONG UNIV
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But in essence, this method does not reduce the matrix dimension of the spectral discretization matrix

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  • Delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization)
  • Delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization)
  • Delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization)

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[0083] 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.

[0084] 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.

[0085] Such as figure 1 Shown: The time-delay power system stability analysis method based on Lowe-order EIGD, ...

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Abstract

The invention discloses a delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization). The method comprises the steps of establishing a delayed power system model for a power system, and linearizing the delayed power system model, that is, expressing the delayed power system model through a delayed differential equation; re-ranking state variables of the delayed power system in the delayed differential equation, and dividing the state variables into delay-independent state variables and delay-dependent state variables; transformingthe delayed differential equation into an ordinary differential equation by use of an infinitesimal generator, thereby equivalently transforming a characteristic equation of the delayed power systeminto an ordinary characteristic equation, and further transforming calculation for characteristic values of the delayed power system into calculation for characteristic values of the infinitesimal generator. According to the delayed power system stability analysis method based on the low-order EIGD, through re-ranking of the state variable of the system, discretization of the delay-independent state variables is removed, the number of dimensions of a discretization matrix is reduced, and therefore, the calculated amount for calculation of key characteristic values of a DCPPS (Delayed Cyber-Physical Power System) is reduced.

Description

technical field [0001] The invention relates to the technical field of power system stability analysis, in particular to a time-delay power system stability analysis method based on low-order explicit infinitesimal generator discretization (Explicitly Infinitesimal Generator Discretization, EIGD). Background technique [0002] The operation and control of modern power systems depend on a reliable information system all the time. The power information system based on computer technology, communication technology and sensor technology is closely and organically combined with the power primary system. The power system is essentially a cyber-physical power system, that is, CPPS (Cyber-Physical Power System). The emergence of Wide-Area Measurement System (WAMS) has brought new opportunities for the development of large-scale interconnected power system stability analysis and control. Its advanced applications include: power system dynamic monitoring and state estimation, paramet...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G06F17/13G06F17/16
CPCG06F17/13G06F17/16G06Q10/0639G06Q50/06
Inventor 叶华牟倩颖刘玉田
Owner SHANDONG UNIV
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