A device and method for quickly identifying the fault location of a distribution network line

A fault location, line fault technology, applied in the fault location, emergency protection circuit devices, electrical components, etc., can solve the problems of large fault influence range, long fault removal time, inability to realize automatic power distribution function, etc., to ensure continuity , The effect of identifying faults quickly

Active Publication Date: 2018-03-13
QINHUANGDAO POWER SUPPLY COMPANY OF STATE GRID JIBEI ELECTRIC POWER COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method leads to a large range of fault influence, a long time for fault removal, and the need for people to participate in the judgment, which cannot realize the real automatic function of power distribution

Method used

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  • A device and method for quickly identifying the fault location of a distribution network line
  • A device and method for quickly identifying the fault location of a distribution network line

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Embodiment Construction

[0033] The following is attached figure 2 The present invention will be described in detail. figure 2 It is a structural diagram of the device for quickly identifying the fault location of the distribution network line of the present invention, and the labels E0-E9 are respectively corresponding detection devices installed on the circuit breakers D0-D9 (normally, the circuit breaker D7 is disconnected, and other circuit breakers are Closing state), the detection device is used to detect the current flowing through the corresponding circuit breaker, assuming that a short circuit fault occurs in the circuit breaker D4~D5, the position of circuit breaker D4, circuit breaker D3, circuit breaker D2, circuit breaker D1, circuit breaker D0 The fault current can be detected everywhere. At this time, the detection devices E0~E4 generate and send out detection signals after detecting the fault current, and the detection devices E0~E4 are placed in the fault state. The dotted line betw...

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Abstract

The invention relates to a device and method for quickly identifying the fault location of a distribution network line. The device includes a detection device and an optical fiber network for connecting adjacent detection devices. The method includes step 1, the detection device detects the current flowing through its corresponding circuit breaker and obtains an instant current value; Step 2, the detection device compares the instant current value with the current value. The preset fault current values ​​are compared; step 3, the detection device sets the fault flag, generates a detection signal at the same time, and transmits it to the adjacent detection device through the optical fiber network; step 4, receives the signal sent by the adjacent detection device through the optical fiber network detection signal; step 5, the detection device judges whether the fault location of the distribution network line is in the power supply interval where the detection device is located according to the detection signal it generates and the detection signal it receives; step 6, if the fault location is in the location where the detection device is located In the power supply section, the detection device controls its corresponding circuit breaker to trip. It is used to quickly troubleshoot faults and ensure circuit stability.

Description

technical field [0001] The invention relates to a device and method for quickly identifying the fault location of a distribution network line. Background technique [0002] The 20KV, 10KV or 6KV power distribution network in the power system has the characteristics of short power supply distance, many branches, and single-end power supply. figure 1 It is the structural diagram of the power distribution network currently in use. The line is in the same substation. The markings D0~D9 are the section circuit breakers on the line or the only circuit breakers in the switching station. D7 is in the disconnected state during normal operation. Others are closed state. At present, the line faults of the distribution network are mainly identified and removed by the line protection in the substation. After the fault is removed, the current magnitude and state at the time of the fault are used to identify the fault location, and then the fault is manually identified and manually remove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26G01R31/08
Inventor 卜瑞军李刚杨泽平李文琦杨屹东魏志强高宇刘科学吕宁川谢小英赵双石侯博王振华刘荣陈淑芝秦妙华张培荣方正基
Owner QINHUANGDAO POWER SUPPLY COMPANY OF STATE GRID JIBEI ELECTRIC POWER COMPANY
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