Intelligent recloser

A recloser and intelligent technology, applied in the field of intelligent reclosers, can solve the problems of increasing switch maintenance times, shortening the service life of switches, arc development faults, etc., achieving shortened maintenance time during power outages, avoiding large current impacts, and reducing impact currents Harmful effect

Inactive Publication Date: 2010-05-19
深圳市联创知识产权服务中心
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional reclosing method essentially relies on the impact of short-circuit current to determine the existence of the fault point. The disadvantages of this mode are obvious. It takes about 200-300ms or even longer from reclosing to protection acceleration tripping. Powerful short-circuit surge current is a kind of damage to all electrical equipment, it will increase the number of overhauls of switches and greatly shorten the service life of switches, and even cause developing faults due to arc light in severe cases

Method used

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Embodiment Construction

[0008] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0009] see figure 1 , is a schematic diagram of the circuit structure of a preferred embodiment of the intelligent recloser of the present invention. The intelligent recloser includes a circuit breaker switch 10, an operating mechanism 20, an upper isolating switch 40, a lower isolating switch 50, a current transformer 60, a voltage transformer 70, a high voltage fuse (not marked), an electronic switch 90, and an intelligent device 130. The circuit breaker switch 10 is connected to the main line and located between the upstream and downstream isolating switches 40 , 50 . The electronic switch 90 is connected in parallel with the circuit breaker switch 10 . The current transformer 60 is connected in series with the parallel branch formed by the circuit breaker switch 10 and the electronic switch 90 . The smart device 130 is connected to the current...

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Abstract

The invention provides an intelligent recloser, which comprises a breaker switch, an operating mechanism, an upper disconnecting switch, a lower disconnecting switch, a current transformer, a high-voltage fuse, a voltage transformer, an electronic switch and an intelligent device, wherein the breaker switch is connected to a main circuit and positioned between the upper disconnecting switch and the lower disconnecting switch; the electronic switch is connected in parallel with the breaker switch; the current transformer is sleeved on a circuit branch of the breaker switch; the breaker switch is connected in parallel with the electronic switch; the intelligent device is connected to the current transformer and the operating mechanism; and the operating mechanism is connected with the breaker switch. The intelligent recloser can intelligently detect whether a fault exists, and can be reclosed or closed correspondingly to a latch, thereby greatly reducing harm to dash current, prolonging service life of the switch and greatly shortening interruption maintenance time.

Description

technical field [0001] The invention relates to an intelligent recloser suitable for power distribution systems, in particular to an intelligent recloser capable of quickly detecting faults, restoring power supply and having small current impact. Background technique [0002] On the transmission line of the power system, when a ground fault occurs, it will cause a protection trip and a power outage. Ground faults are divided into instantaneous ground faults (such as short-circuit to ground caused by instantaneous contact of tree branches), and one is permanent faults (such as cable breakdown). Statistics show that more than 80% of the faults are instantaneous faults. In order to reduce the power outage time, the power system often adopts the reclosing mode, that is, after a short time delay (such as 0.3S) after the protection action, it will be closed immediately. If there is no short-circuit current The impact is considered to be an instantaneous fault and the power supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/06H02H3/07G01R31/08
Inventor 郭鸿
Owner 深圳市联创知识产权服务中心
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