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Modal analysis method for solving complex electrical faults

A technology of electrical faults and analysis methods, which is applied in complex mathematical operations and other directions, and can solve problems such as long-term instability and fluctuation of electrical signals

Pending Publication Date: 2020-01-24
NINGXIA KAICHEN ELECTRIC GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the existing system, the mechanism and cause of some non-complex faults can be understood in detail, but for some very complex faults, such as long-term unstable fluctuations of electrical signals, it is difficult to make a well-founded mechanism analysis

Method used

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  • Modal analysis method for solving complex electrical faults
  • Modal analysis method for solving complex electrical faults
  • Modal analysis method for solving complex electrical faults

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Experimental program
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Embodiment 1

[0039] A novel modal analysis method based on electrical data, comprising the following steps:

[0040] 1. Use the algorithm with intrinsic orthogonal decomposition as the core to perform high-dimensional degradation processing on electrical data.

[0041] 2. The supporting analysis process using this method, including energy proportion analysis, visual display analysis of modal coefficient changes with time steps, frequency modal analysis, and Lissajous graphic analysis of modal coefficients.

[0042] details as follows:

[0043] 1. Introduction to decomposition method:

[0044] Its basic idea is to decompose the random process to be studied into an expansion sequence of a function only related to time and a function related only to space, namely

[0045]

[0046] In the formula, Represents the fluctuation of the variable (remove the mean value), then a i (t) represents the modal coefficient, and the unit is the unit of the analyzed variable; φ i (x, y) is a dimensio...

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Abstract

The invention provides a modal analysis method for solving complex electrical faults. The method is characterized by comprising the following steps: (1) carrying out high-dimensional degradation processing on electrical data by adopting an algorithm taking intrinsic orthogonal decomposition as a core; and (2) carrying out matching analysis, specifically including energy proportion analysis, visualdisplay analysis on the change of a modal coefficient along with time steps, and Lissajous graph analysis matched with frequency modal analysis and the modal coefficient. The method has the advantages that fault parameter information can be obtained as much as possible, and a high-quality data analysis basis is provided for an advanced algorithm; 2, an information algorithm with a mature processis provided for electrical fault data analysis; and 3, powerful decision information is provided for an electrical big data platform.

Description

technical field [0001] The invention relates to a modal analysis method for solving complex electrical faults. Background technique [0002] The power system is composed of generators, transformers, lines and users that produce, transmit, distribute and consume electric energy. It is a unified system that converts primary energy into electric energy and transmits and distributes it to various users. Because the power system plays an important role in the national economy and people's life, the research on the fault analysis method of the power system has always been paid attention to by people. The current fault judgment method is to conduct frequency analysis through Fourier transform. If the energy contributed by the high-frequency component is greater than a certain threshold, the system is considered to be faulty. By identifying other characteristics, such as overcurrent or zero-sequence overvoltage, etc. Corresponding protection measures, such a mode can play a very go...

Claims

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Application Information

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IPC IPC(8): G06F17/11G06F17/16
CPCG06F17/11G06F17/16
Inventor 张衍奎王川朱建华鲍伟田新宇李文华
Owner NINGXIA KAICHEN ELECTRIC GROUP
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