COAL ENGINEERING ›› 2014, Vol. 46 ›› Issue (1): 18-21.doi: 10.11799/ce201401006

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A New Technology of Avoiding Override Trip Based on GOOSE in Coal Mine Power System

  

  • Received:2013-08-15 Revised:2013-03-17 Online:2014-01-10 Published:2014-01-10

Abstract:

Contrary to universal override trip in coal mine power system, the paper analyzed the defects of the related protection principles and methods for avoiding override trip. On the basis of the current intelligent protector status and the existence construction conditions, a new technology of avoiding override trip based on GOOSE with selective short-circuit protection is provided. Compared with the original protector, the new protector adds GOOSE com-munication module, which shares an Ethernet with monitoring systems and can reliably transfer GOOSE blocking signal. The results of testing and operation shows that the Protector based on GOOSE can quickly and accurately find the fault point and select the nearest breaker to trip, it can efficiently avoid the large blackout caused by Override trip and improve the reliability and safety of the coal mine power system.

Key words: Override trip, GOOSE, Ethernet communication, Short-Circuit Protection, Coal mine power system