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Three-phase fault processing method of distributing line

A technology for distribution lines and three-phase faults, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of low communication reliability and heavy recloser burden.

Active Publication Date: 2012-08-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the fault handling of power distribution lines relies on low reliability of communication, and relies on multiple disconnections of the recloser, and the burden on the recloser is heavy

Method used

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  • Three-phase fault processing method of distributing line
  • Three-phase fault processing method of distributing line
  • Three-phase fault processing method of distributing line

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Embodiment Construction

[0012] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit.

[0014] figure 1 The three-phase fault processing flow of the distribution line is shown.

[0015] Closed-loop structure of distribution lines, open-loop segmented operation. Each section is equipped with a switch that can cut off the short-circuit current.

[0016] Step 1, fault detection. Real-time detection of voltage and current on the distribution line to determine whether a three-phase fault ...

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Abstract

The invention discloses a three-phase fault processing method of a distributing line, which is used for rapid isolation of faults of the distributing line and rapid restoration of power supply of non fault sections. The method comprises the steps of firstly, performing three-phase fault detection and judging whether a three-phase fault occurs or not on the distributing line based on a condition that three-phase voltage is reduced or three-phase current is increased; secondly, performing three-phase fault isolation, protecting rapid motions and isolating the distributing line without choices based on a condition that the three-phase current is increased and the three-phase voltage is reduced; and thirdly, performing power supply restoration, judging fault sections based on a three-phase reclosure technology and simultaneously restoring loaded power supply in electricity shutdown in the non fault sections. The three-phase fault processing method of the distributing line can achieve the rapid isolation of the fault sections and the rapid power supply restoration of the non fault sections of the distributing line which is independent of communication channels and based on one-terminal information.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a three-phase fault processing technology for power distribution lines. Background technique [0002] Distribution lines (also known as feeder lines, feeder lines) are an important part of the power distribution system. After a fault occurs in the distribution line, automatic detection and removal of the faulty section is a prerequisite for ensuring the reliability of power supply for users. [0003] In the 1980s, developed countries appeared distribution line automation systems marked by intelligent switching devices such as sectionalizers and reclosers. The search and isolation of the faulty section and the restoration of power supply for the non-faulty section are automatically realized by the repeated cooperation of the sectionalizer and the recloser. For every fault, the recloser has to be disconnected many times, which is a heavy burden, takes a long time to remove the fault, ...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H3/08H02H3/06
Inventor 董新洲施慎行
Owner TSINGHUA UNIV
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