Method and device for processing, analyzing and positioning single-phase grounding fault of small-current grounding

A single-phase grounding fault and low-current grounding technology, applied in the fault location, measuring device, detecting faults according to conductor types, etc., can solve the problems affecting the reliability of power supply, shorten the fault processing time, collect comprehensive data, and ensure reliability. sexual effect

Pending Publication Date: 2021-12-21
JINAN LICHENG POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO +1
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Problems solved by technology

[0004] The invention provides a single-phase ground fault processing analysis and positioning method and device for small current grounding, which are used to solve the existing problem of judging single-phase ground fault lines affecting power supply reliability

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  • Method and device for processing, analyzing and positioning single-phase grounding fault of small-current grounding
  • Method and device for processing, analyzing and positioning single-phase grounding fault of small-current grounding
  • Method and device for processing, analyzing and positioning single-phase grounding fault of small-current grounding

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[0037] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...

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Abstract

The invention provides a small-current grounding single-phase grounding fault processing, analyzing and positioning method and device. The method comprises the following steps of detecting a single-phase grounding fault occurring in a substation bus; and determining a fault position according to the report information of operation and maintenance personnel, the fault area analysis information of a distribution network automation system master station, the line selection signal information of a transformer substation protection device and the line selection signal information of a D5000 system in sequence. According to the method, multi-system signals such as a distribution network automation system, a D5000 system and a transformer substation protection device signal are comprehensively considered for network analysis processing, problems that a grounding fault point cannot be found and the accuracy is low due to data disturbance of a single system are solved, the fault processing flow is clear, comprehensiveness and accuracy of information overall analysis are ensured, and large-area power failure is not needed in the whole fault analysis and positioning process, so reliability of power supply is guaranteed.

Description

technical field [0001] The invention relates to the technical field of single-phase ground fault location, in particular to a single-phase ground fault processing, analysis and location method and device for small current grounding. Background technique [0002] In the operation of 10kV distribution lines, single-phase ground short circuit is a common fault. At present, many low-voltage distribution networks adopt a small-current grounding system in which the neutral point is grounded through the arc-suppression coil. Under the ground fault, the arc-suppression coil compensates the line capacitance current through over-compensation, so that the equipment can run for a short time while avoiding overvoltage at the grounding point. However, quickly finding and eliminating the ground fault point is still conducive to the safe and stable operation of the power grid. When a single-phase ground fault occurs, the fault line or section should be removed as soon as possible according...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/52
CPCG01R31/086G01R31/088G01R31/52
Inventor 徐现昊安宁王乐秋张艳然卢宪斐李化波朱大千刘率然
Owner JINAN LICHENG POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO
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