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A Stability Analysis Method for Power System with Time Delay Based on Low-order eigd

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

Active Publication Date: 2020-05-08
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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  • A Stability Analysis Method for Power System with Time Delay Based on Low-order eigd
  • A Stability Analysis Method for Power System with Time Delay Based on Low-order eigd
  • A Stability Analysis Method for Power System with Time Delay Based on Low-order eigd

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[0081] 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.

[0082] 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.

[0083] Such as figure 1 Shown: The time-delay power system stability analysis method based on Lowe-order EIGD, ...

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Abstract

The present invention provides a low-order and explicit infinitesimal generator discretization (EIGD) method for small signal stability analysis and control of large-scale delayed cyber-physical power system (DCPPS), and a system thereof. The system based on low-order EIGD method comprises the large-scale interconnected power system, wide-area measurement system (WAMS) and wide-area damping controller(WADC), forming a platform for dynamic monitoring as well as stability analysis and control of the large-scale interconnected power system. The method comprises that the dynamic model of DCPPS is established and linearized into a set of delayed differential equations; the state variables of DCPPS in delayed differential equations are rearranged and partitioned into two parts: delay-free state variables and delayed state variables; by utilizing the infinitesimal generator, the delayed differential equation is transformed into the ordinary differential equation; correspondingly, the characteristic equation of DCPPS can be transformed into the general characteristic equation that is described by the infinitesimal generator; the eigenvalues of DCPPS are identical to eigenvalues of the infinitesimal generator. By rearranging the state variables of the system, the present invention eliminates the discretization of the state variables not related to the time delay, reduces the dimension of the discretization matrix, and thereby reduces the calculation amount of the critical eigenvalues calculation of DCPPS.

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 Patents(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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