Differential protection method for bridge circuit in current converter control system

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United States of America Patent

PATENT NO 9667131
APP PUB NO 20170005569A1
SERIAL NO

15076662

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Abstract

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The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided, is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time.

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Patent Owner(s)

Patent OwnerAddress
STATE GRID CORPORATION OF CHINA100031 NO 86 WEST CHANG'AN AVENUE BEIJING XICHENG DISTRICT BEIJING CITY BEIJING CITY 100031
XI'AN JIAOTONG UNIVERSITYBEILIN DISTRICT XIANNING WEST ROAD 710049 SHAANXI CITY OF XI'AN PROVINCE NO 28 XI'AN CITY SHAANXI PROVINCE 710049
XJ GROUP CORPORATIONNO 1298 XUJI AVENUE XUCHANG HENAN 461000
XJ ELECTRIC CO LTDNO 1298 XUCHANG CITY HENAN PROVINCE 461000 XJ AVENUE XUCHANG CITY HENAN PROVINCE 461000
XUCHANG XJ SOFTWARE TECHNOLOGIES LTDNO 38 XUJI AVENUE XUCHANG 461000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jiang, Ruizhi Xuchang, CN 3 0
Li, Guobin Xuchang, CN 40 171
Liu, Peiyao Xuchang, CN 1 0
Liu, Xing Xuchang, CN 321 1202
Song, Guobing Xuchang, CN 2 0
Yang, Yuanhang Xuchang, CN 6 0
Zhu, Xu Xuchang, CN 46 993

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