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Data mining-based power distribution network fault precise localization method

A technology for accurate positioning of power distribution network faults, applied in data processing applications, complex mathematical operations, instruments, etc., can solve problems such as economic losses of power grid enterprises and industrial users, affecting the normal electricity consumption of ordinary residents, etc.

Inactive Publication Date: 2017-01-11
STATE GRID CORP OF CHINA +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

It not only caused economic losses to power grid enterprises and industrial users, but also affected the normal electricity consumption of ordinary residents.

Method used

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  • Data mining-based power distribution network fault precise localization method
  • Data mining-based power distribution network fault precise localization method
  • Data mining-based power distribution network fault precise localization method

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Embodiment Construction

[0063] Urban distribution network or rural power grid is a typical ungrounded system. Due to the lack of zero-sequence access, it is impossible to quickly determine the location of the fault point through protection or fault recording devices. And due to the difference in the peak and valley of electricity load, there will be a certain difference in the amount of load lost when a failure occurs in the peak and valley of electricity consumption in the same electricity load area. Therefore, it is difficult to lock the lost load area simply according to the magnitude of the lost load. In view of this, the present invention performs data fitting and Fourier transformation on the data point sets of active power, reactive power and current, thereby obtaining a frequency domain function that has nothing to do with time, and avoiding the influence of the peak-to-valley difference of electric load and the time of fault occurrence on the fault Impact of component analysis. So as to lay...

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Abstract

The invention provides a data mining-based power distribution network fault precise localization method. Data mining is introduced into the power grid dispatching field; based on Fourier analysis on historical fault trips, a clustering algorithm is adopted to establish the vector cluster of fault trip locations; the location of a tripping switch on which a new fault occurs is judged through calculating the similarity between the fault frequency domain characteristic vector of the new fault and the characteristic vectors of each cluster; and a fault range is locked based on the location of the tripping switch. According to the method, the range of an actual fault is judged through the change of the electric quantity of a high-voltage level outgoing switch, and therefore, the problem of incomplete coverage of special data dispatching networks in China can be solved, especially, problems in fault localization of an urban distribution network and a rural power grid can be solved, accident processing time for the faults of the distribution network and the rural power grid can be shortened, and power outage time can be reduced.

Description

technical field [0001] The invention relates to the application field of intelligent technology for power grid dispatching, and more specifically, relates to a method for accurately locating distribution network faults based on data mining. Background technique [0002] With the continuous deepening of my country's power grid construction, the construction of distribution networks and rural power grids has been continuously strengthened, and the scale of power grids has become larger and larger. But correspondingly, the supporting construction of communication and automation equipment is relatively backward. Since the dispatching data private network has not achieved full coverage of the distribution network and the rural network, when the distribution network and the rural network fail, the dispatching department cannot immediately find the trip information of the switch on the pole, the switching station, and the ring network cabinet, which affects The time for effectivel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06G06F17/14
CPCG06F17/14G06Q50/06Y04S10/50
Inventor 舒征宇刘庆国胡为民李黄强李靖张伟奇韩露
Owner STATE GRID CORP OF CHINA
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