Turn-to-turn protection method and device for converter transformer

Turn-to-turn protection method and device for converter transformer

The invention relates to the field of direct current transmission converter transformer protection, in particular to a turn-to-turn protection method and device for a converter transformer. The method comprises the following steps: acquiring a grid-side three-phase current value and a valve-side thr...

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Hauptverfasser: XU PENGJIAN, HUANG JINHAI, OH KYUNG-BUM, SHENG YAN, FAN ZIQIANG, LI YAFENG, LI CHUANXI, TIAN PEITAO, FAN XUEFENG, LUO LEI, LI ZHUOFAN
Format: Patent
Sprache:chi ; eng
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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creator XU PENGJIAN
HUANG JINHAI
OH KYUNG-BUM
SHENG YAN
FAN ZIQIANG
LI YAFENG
LI CHUANXI
TIAN PEITAO
FAN XUEFENG
LUO LEI
LI ZHUOFAN
description The invention relates to the field of direct current transmission converter transformer protection, in particular to a turn-to-turn protection method and device for a converter transformer. The method comprises the following steps: acquiring a grid-side three-phase current value and a valve-side three-phase current value of a converter transformer, calculating a differential current effective value and a differential current instantaneous value, carrying out differential protection judgment according to a brake current effective value and the current differential current effective value, carrying out periodic sudden change judgment according to a memory differential current effective value and the current differential current effective value, and carrying out cyclic sudden change judgment according to the memory differential current effective value and the current differential current effective value. If yes, intermittent locking judgment is carried out according to the memory differential current instantaneo
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subjects CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
title Turn-to-turn protection method and device for converter transformer
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