Author(s)

Feng Du^1*, Weigang Chen¹, Yue Zhuo¹, Michael Anheuser²

¹Siemens Ltd. China, Shanghai, China.
²Siemens AG, Amberg, Germany.

To reduce the pressure on contacts and circuit breaker and realize the zone selective interlocking (ZSI) function above the instantaneous protection threshold (e.g., >10In), the short circuit current needs to be early detected. The state-of–art of early short circuit detection (ESCD) method is reviewed. Based on the equivalent model of the short circuit, a new method based on the current and its integration is proposed. The prospective current value can be detected in the early stage of the short circuit. According to the evaluation result, the short circuit current can be early forecasted with the proposed method.

Early Short Circuit Detection; Zone Selective Interlocking; Instantaneous Protection

Du, F. , Chen, W. , Zhuo, Y. and Anheuser, M. (2014) A New Method of Early Short Circuit Detection. Journal of Power and Energy Engineering, 2, 432-427. doi: 10.4236/jpee.2014.24058.