Homology cluster identification method based on wavelet transformation and apparatus thereof

A wavelet transform and identification method technology, applied in circuit devices, AC network circuits, electrical components, etc., can solve problems affecting the stability of power systems, overloading of transmission lines and other equipment, etc., to achieve real-time discrimination and improve the level of stable control Effect

Active Publication Date: 2016-03-23
TSINGHUA UNIV +2
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  • Abstract
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Problems solved by technology

If this out-of-step phenomenon cannot be effectively suppressed, as the power angle between the asynchronous generator groups continues to i...

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  • Homology cluster identification method based on wavelet transformation and apparatus thereof
  • Homology cluster identification method based on wavelet transformation and apparatus thereof
  • Homology cluster identification method based on wavelet transformation and apparatus thereof

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Embodiment Construction

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] The following describes the method and device for coherent cluster identification based on wavelet transform in the embodiments of the present invention with reference to the accompanying drawings.

[0023] figure 1 It is a flowchart of a coherent cluster identification method based on wavelet transform according to an embodiment of the present invention. Such as figure 1 Shown:

[0024] S1, obtain the power angle curve of each generator in the power system.

[0025] Specifically, according to PM...

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Abstract

The invention discloses a homology cluster identification method based on wavelet transformation and an apparatus thereof. The method comprises the following steps of acquiring a power angle curve of each generator in an electric power system; carrying out wavelet transformation analysis on the power angle curve of each generator respectively; carrying out feature extraction on the power angle curve of each generator after the wavelet transformation analysis respectively to acquire a homology identification key characteristic of each generator; according to the homology identification key characteristic of each generator, carrying out cluster analysis based on a density so as to acquire a plurality of homology clusters. By using the method, the homology clusters during a transient process in the electric power system can be rapidly and accurately identified and real-time discrimination of the homology clusters is realized so that an important reference is provided for scheduling personnel to adopt corresponding emergency control measures and a stable control level of the electric power system is increased.

Description

Technical field [0001] The invention relates to the field of power system stability analysis, and in particular to a method and device for coordinating cluster identification based on wavelet transform. Background technique [0002] In order to resolve the increasingly prominent contradiction between the energy structure and power growth, and to achieve a more economical and reliable operation of the power grid, the world’s major power operators have begun the process of large-scale grid interconnection. my country has basically formed the "West-East Power Transmission, The overall pattern of mutual supply between North and South and nationwide networking. However, the stability characteristics of large-scale interconnected power grids are often very complex. Serious faults or even cascading faults in the interconnected power grids, especially when the faults occur in weak links of the system, may cause the cluster to lose synchronization, that is, the split of each generator in t...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 胡伟闵勇周一凡李淼邵立政张振兴周悦
Owner TSINGHUA UNIV
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