Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line

An overhead line, automatic diagnosis technology, applied in emergency protection circuit devices, fault locations, measurement devices, etc., can solve the problems of fault location troubled by operating departments, affecting power supply reliability and economic benefits, and achieve fault isolation and rapid power recovery. , Improve the reliability of power supply, the effect of simple and reliable system

Inactive Publication Date: 2009-07-15
BEIJING SHENGHUAHONGYE TECH
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  • Abstract
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  • Claims
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Problems solved by technology

This leads to a power outage for a long period of time for all loads on the line, which greatly affects the reliability of power supply an...

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  • Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line
  • Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line
  • Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line

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Embodiment Construction

[0034] The technical solution of the present invention will be further described in detail through specific embodiments in conjunction with the description and figures below.

[0035] The automatic diagnosis and isolation device for overhead line faults in distribution network consists of four parts: relay protection device, single-phase grounding line selection and fault detection terminal device, line circuit breaker, and line recloser. The relay protection device, single-phase grounding line selection And the fault detection terminal device is the secondary equipment of the power system, and the circuit breaker and line recloser are the primary equipment of the power system. The line recloser is installed on the overhead line, and other devices are installed in the substation. Such as figure 1 As shown, A is a substation, the relay protection device, single-phase grounding line selection and fault detection terminal device are installed in substation A, CB is a circuit bre...

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Abstract

The present invention discloses a apparatus and method for automatic isolation of fault section of short circuit fault of power distribution network overhead network and single-phase earth fault, and power supply automatic recovery of non-fault section, which is suitable for power distribution network electric network overhead network of 3-10kV. The principle of automatic isolation and power supply automatic recovery is as following: mount a plurality of voltage type recloser on the overhead network to separate the network into a plurality of sections; when fault occurs, a relay protection device or a line selection device transmits signal to automatically break off or close a faulty line outlet breaker according to preset delay time and action sequence, and then coordinate with the network recloser; determine fault section through one time reclosing; isolate fault section through secondary reclosing and then recover power supply in non-fault section. At the same time, a detection terminal installation mounted on a substation can automatically judge section where the fault in, and transmit the fault message to a scheduling background while transmitting to designated customers in short message way. The present invention is provided with mature technology and high reliability.

Description

technical field [0001] The invention belongs to the technical field of electric power system, and specifically relates to a method applicable to overhead lines of 6-10kV distribution network, capable of quickly automatically isolating faulty sections and automatically restoring power supply to non-faulty sections for short-circuit faults and single-phase grounding faults and device. Background technique [0002] The 6-10kV distribution network in my country is characterized by numerous branches and scattered loads. When a short-circuit fault or ground fault occurs on the line, the traditional measure is to disconnect the line from the beginning of the line, and then perform troubleshooting, or manually isolate the faulty section . This has led to a power outage for a long period of time for all loads on the line, which has greatly affected the reliability of power supply and economic benefits. At the same time, due to the wide distribution of lines, the problem of fault loc...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H3/08G01R31/02G01R31/08
CPCY04S10/522Y04S10/52
Inventor 程培军
Owner BEIJING SHENGHUAHONGYE TECH
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