Distribution network single-phase earth fault identification method based on long-short time memory network

A single-phase ground fault, long and short-term memory technology, applied in the field of distribution network, can solve problems such as slow response speed, low reliability, manual line inspection, etc., to achieve the effect of simple structure, fast calculation, and improved automation level

Active Publication Date: 2019-08-02
STATE GRID ANHUI ELECTRIC POWER +1
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Problems solved by technology

[0015] The present invention provides a long-short-term memory network-based identification method for single-phase grounding faults in distribution networks, which solves the problems of low reliability of existing identification methods, mainly relying on manual line inspection, and slow response speed.

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  • Distribution network single-phase earth fault identification method based on long-short time memory network
  • Distribution network single-phase earth fault identification method based on long-short time memory network
  • Distribution network single-phase earth fault identification method based on long-short time memory network

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Embodiment Construction

[0038] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0039] Such as figure 1 As shown, the present invention provides a long-short-term memory network-based single-phase ground fault identification method for distribution network, which is suitable for single-phase ground fault identification in distribution network systems whose neutral points are grounded through arc suppression coils, mainly including single-phase For ground faults, the classification and identification of arc faults and non-arc faults and the classification and identification of grounding types are carried out.

[0040] For the classification and identification of whether a single-phase ground fault contains an arc, it is mainly obtained by obtaining the zero-sequence current of multiple continuous cycle periods during the steady state of the fault, and then taking the waveform of the ...

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Abstract

The invention belongs to the technical field of intelligent control, and discloses a distribution network single-phase earth fault identification method based on a long-short memory network, which comprises the following steps: performing classification identification of arc-containing fault class and arc-free fault class and classification identification of earth type on a single-phase earth fault; acquiring zero sequence currents of continuous multiple periods during a fault steady state period, taking the waveform of the zero sequence current of a period time slot as a sample point, and performing classification identification of the arc-containing fault class and the arc-free fault class on the zero sequence currents of continuous multiple period time slots by using an LSTM deep learning classifier; single-phase earth fault of the arc-containing fault class and the arc-free fault class calculating unit period earth transition resistance of continuous multiple period time slots by using instantaneous voltage and current of continuous multiple period fault phases respectively; and carrying out classification identification on the unit period earth transition resistance of the continuous multiple period time slots by using a multilayer neural network by taking a change curve of the unit period earth transition resistance of one period time slot as a sample point to finish theidentification of the single-phase earth fault.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a method for identifying single-phase grounding faults in a distribution network based on a long-short-term memory network. Background technique [0002] my country's medium and low voltage distribution network is dominated by overhead lines, the structure of the line is complex, there are many branches, and it is prone to failure. According to statistics, during the operation of the power system, power outages caused by distribution network faults account for more than 95% of the total power outages, of which 70% are caused by single-phase ground faults or busbar faults. In order to realize the rapid isolation of distribution system faults and restore the normal operation of the distribution network system, it is necessary to accurately and quickly realize the fault location of the distribution network. At present, fault location mainly relies on manual line inspe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/02
CPCG01R31/086G01R31/50
Inventor 谢民邵庆祝王同文陈实程晓平王栋方林波张骏夏友斌仇前生
Owner STATE GRID ANHUI ELECTRIC POWER
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