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Method and device for processing single-phase ground fault

A single-phase-to-ground fault and fault technology, applied in the fault location, measurement device, instrument, etc., can solve the problem of inability to accurately locate the specific line of the single-phase ground fault, and achieve the effect of improving reliability

Inactive Publication Date: 2019-04-16
STATE GRID BEIJING ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for dealing with single-phase grounding faults, so as to at least solve the technical problem of being unable to accurately locate the specific line of the single-phase grounding fault in the prior art and deal with the single-phase grounding fault in time

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  • Method and device for processing single-phase ground fault

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Embodiment 1

[0025] According to an embodiment of the present invention, an embodiment of a method for processing a single-phase-to-ground fault is provided. It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions , and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0026] figure 1 is a flow chart of a method for processing a single-phase-to-ground fault according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0027] Step S102, detecting whether there is a sudden change in the zero-sequence current value of each line in the distribution network;

[0028] Step S104, when the detection result indicates that the zero-sequence current value of any one line has the above-mentioned sudde...

Embodiment 2

[0080] According to an embodiment of the present invention, an embodiment of a device for implementing the above method for handling a single-phase-to-ground fault is also provided, image 3 is a schematic structural diagram of a device for handling single-phase ground faults according to an embodiment of the present invention, as shown in image 3 As shown, the above-mentioned device for processing a single-phase ground fault includes: a first detection module 30, a first determination module 32 and a first alarm module 34, wherein:

[0081] The first detection module 30 is used to detect whether the zero-sequence current value of each line in the distribution network has a sudden change; the first determination module 32 is used to indicate that the above-mentioned zero-sequence current value of any line has the above-mentioned sudden change when the detection result In this case, it is determined that any one of the above-mentioned lines has a single-phase ground fault; the...

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Abstract

The invention discloses a method and device for processing a single-phase ground fault. The method comprises the following steps: detecting whether a zero sequence current value of each line in the power distribution grid is mutant; determining that the single-phase ground fault is existent in any line when a detection result indicates that the zero sequence current value of any line is mutant; outputting first alarm information through remote transmission equipment in a transformer substation, wherein the first alarm information is at least used for indicating a target object to perform troubleshooting processing on the line with the single-phase ground fault. Through the method disclosed by the invention, the technical problems that the specific line of the single-phase ground fault cannot be accurately positioned and the single-phase ground fault cannot be processed in time in the prior art are solved.

Description

technical field [0001] The invention relates to the field of distribution network fault processing, in particular to a method and device for processing single-phase ground faults. Background technique [0002] In the existing technology, the low-voltage distribution network mostly adopts a small-current grounding system. According to statistics, in the small-current grounding system, more than 80% of the faults in the distribution network are single-phase grounding faults. The outstanding advantages of the small-current grounding system are After a single-phase ground fault occurs, the fault current is small, the protection device does not need to act immediately, and the system can continue to run for 1-2 hours, which relatively improves the reliability of power supply. [0003] However, when a single-phase ground fault occurs in a feeder line of the substation, the substation will only alarm the corresponding busbar grounding at this time, and cannot identify the specific ...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R31/02
CPCG01R31/08G01R31/50
Inventor 杨逍杨士奇高尚朱海彬王禹赵虎李媛
Owner STATE GRID BEIJING ELECTRIC POWER
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