Three-phase self-adaptive reclosing method and system for sending-out line of wind power plant based on current of shunt reactor

Three-phase self-adaptive reclosing method and system for sending-out line of wind power plant based on current of shunt reactor

The invention relates to a wind power plant sending-out line three-phase self-adaptive reclosing method and system based on shunt reactor current, and belongs to the field of power system relay protection. When an inter-phase or three-phase fault occurs in a sending-out line, breakers at the two end...

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Hauptverfasser: CAO YAOREN, GONG FENG, DAI YUE, LONG YU, GUAN PU, LI CONG, ZHAO WEI, SHU HONGCHUN, ZHANG YUECHAO, GUAN CHENG
Format: Patent
Sprache:chi ; eng
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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creator CAO YAOREN
GONG FENG
DAI YUE
LONG YU
GUAN PU
LI CONG
ZHAO WEI
SHU HONGCHUN
ZHANG YUECHAO
GUAN CHENG
description The invention relates to a wind power plant sending-out line three-phase self-adaptive reclosing method and system based on shunt reactor current, and belongs to the field of power system relay protection. When an inter-phase or three-phase fault occurs in a sending-out line, breakers at the two ends trip, a current transformer is used for sampling three-phase current signals of the shunt reactor, differential mode current of the shunt reactor is calculated, zero-cross detection is carried out on the differential mode current, a fault property recognition criterion is constructed, and fault property judgment is carried out in combination with a sliding time window within the maximum judgment time limit. For a permanent fault, the reclosing device is locked; and for an instantaneous fault, calculating a fault disappearance moment, determining a reclosing moment, and opening a reclosing device. The fault property is identified by detecting whether the differential mode current of the shunt reactor passes throug
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subjects CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
title Three-phase self-adaptive reclosing method and system for sending-out line of wind power plant based on current of shunt reactor
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