Study on selective short-circuit protection based on CAN communication

After analyzing the reason of override trip caused by short-circuit fault in 6 kV underground high-voltage grid, the paper studies the related protection principles and the methods to improve the sensitivity and reliability of the underground high-voltage grid short-circuit protection in depth. On t...

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Bibliographic Details
Published inDianli Xitong Baohu yu Kongzhi Vol. 39; no. 8; pp. 139 - 142
Main Authors Shi, Li-Ping, Wen, Shu-Feng, Huang, Yan-Qing
Format Journal Article
LanguageChinese
Published 16.04.2011
Subjects
Blackout
Control systems
Cut off
Design engineering
Faults
Mines
Power supplies
Underground
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Summary:After analyzing the reason of override trip caused by short-circuit fault in 6 kV underground high-voltage grid, the paper studies the related protection principles and the methods to improve the sensitivity and reliability of the underground high-voltage grid short-circuit protection in depth. On the basis of the current intelligent protector status in mine, the paper proposes a high-voltage comprehensive protector based on CAN network communication with selective short-circuit protection. Compared with the original protector, the proposed protector adds CAN communication interface module, which can make judgment by the priority of the multi-computer. Besides, the presented protector designs the display into independent CPU with communication performance.The actual operation shows that the improved high-voltage comprehensive protector can quickly and accurately find the fault point and cut off the power supply, thus, it can efficiently avoid the large area blackout caused by the override trip, reduce the hid
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ISSN:1674-3415