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An intelligent distribution network area protection control system and a control method

A technology of regional protection control and intelligent distribution network, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of long time to restore power supply, large loss of switchgear, and inability to adapt, so as to improve the reliability of power supply and quickly transfer power. The effect of supply and rapid isolation

Active Publication Date: 2019-01-11
CHINA SOUTHERN POWER GRID COMPANY +1
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AI Technical Summary

Problems solved by technology

For important loads, these control methods inevitably have disadvantages such as low selectivity of fault removal, low reliability of fault tripping, large loss of switchgear, and long fault processing time.
With the addition of flexible multi-state switches, the requirements for quick action, sensitivity and coordinated control of protection become higher, and the traditional centralized feeder automation is completely unable to adapt
Centralized feeder automation relies on the substation circuit breaker to trip the faulty line, judges the fault location through the overcurrent signal of the power distribution terminal configured by the load switch, and then remotely controls the load switch to isolate the fault point, and then remotely closes the contact switch to restore power supply, and the recovery time is relatively short long

Method used

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  • An intelligent distribution network area protection control system and a control method
  • An intelligent distribution network area protection control system and a control method
  • An intelligent distribution network area protection control system and a control method

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described:

[0042] The invention provides an intelligent distribution network area protection control system, including an intelligent distributed device and a flexible direct coordination controller. The optical fiber longitudinal differential protection is used as the main protection, and the network topology protection is used as the fast backup protection of the optical fiber longitudinal differential protection; the flexible DC coordination controller is installed in the flexible DC converter station, and the intelligent distributed The coordination controller performs information exchange, and coordinates the contact switch and the flexible multi-state switch on the AC side to jointly complete the self-healing recovery of power supply after fault isolation.

[0043] Further, the intelligent distributed device is equipped with overcurrent protection, zero-sequ...

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Abstract

The invention discloses an intelligent distribution network area protection control system and a control method. The system is mainly composed of intelligent distributed devices, a flexible and straight coordination controller. By exchanging GOOSE real-time information with each other, Under the fault condition, the active defense control, fault crossover control of flexible multi-state switches and the fault recovery control of cooperation between conventional contact switches and flexible multi-state switches can realize the fast location and isolation of distribution network faults and thefast transfer of non-fault sections, and improve the reliability of distribution network power supply.

Description

technical field [0001] The invention belongs to the field of distribution automation, and in particular relates to an intelligent distribution network area protection control system and a control method. Background technique [0002] At present, most of the domestic power distribution automation adopts the mode of recloser / sectioner and centralized feeder automation based on communication. The feeder terminal is installed on the switch on the column, and the station terminal is installed on the ring net box and the switch station. At the same time, many Fault indicators, these control methods are simple to operate, economical and practical, and are widely used. The configured power distribution terminal has three remote functions and simple protection functions; considering the cost problem, most of the primary switches are load switches, and only the switches on the substation side are equipped with circuit breakers. For important loads, these control methods inevitably ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H7/28
CPCH02H7/26H02H7/261H02H7/28
Inventor 李正红高超丁晓兵金震余江朱中华张弛侯炜陈宏山黄福全刘子俊陈朝晖张静伟高永强冯宝成
Owner CHINA SOUTHERN POWER GRID COMPANY
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