Performance evaluation of solid state fault current limiters in electric distribution system

The expansion of electric distribution system has resulted in an increasing need of fault current limiter in so as to limit fault currents to the downstream protection devices as a means of improving power quality. Considerations in the use of fault current limiter are that it must be reliable in operation, compact and inexpensive. This paper presents a comprehensive performance evaluation on the use of solid-state fault current limiters (FCL) in a distribution system. The FCL simulation model has been developed using the electromagnetic transient program PSCAD/EMTDC and a new control strategy for the FCL has been proposed for instantaneous detection of over current. The FCL is evaluated in terms of its performance in limiting fault current to the tolerable limit of the system, as well as the response of the FCL within a fraction of a cycle of about 2 ms. The effects of varying circuit parameters such as R, L, and C as part of the FCL device has been investigated. It has been noted that the inductive reactor, which is part of the FCL device, is suitable for limiting the fault current. The impact of induction motor loads on the FCL has also been analyzed. Simulation results show that the FCL is effective for reducing short circuit currents and also can be used to protect bus bars from voltage sag when the system is subjected to various types of faults.

[1]  R. Blasco-Gimenez,et al.  Solid state devices for protection in distribution systems. A new proposal for solid state transfer switch (SSTS) , 2000, Ninth International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.00EX441).

[2]  Toshiaki Ueda,et al.  Solid-state current limiter for power distribution system , 1993 .

[3]  A.M. Gole,et al.  On using the solid state breaker in distribution systems , 1998, Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341).

[4]  P. C. Loh,et al.  Voltage quality enhancement with power electronics based devices , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[5]  A. Y. Chikhani,et al.  Fault-current limiter with thyristor-controlled impedance , 1993 .

[6]  P. Malkin,et al.  Solid-state 13-kV distribution class circuit breaker: planning, development and demonstration , 1994 .

[7]  Yuexin Yin,et al.  Closure To Discussion Of "fault-current Limiter Applications In Medium- And High-voltage Power Distribution Systems" , 1998 .

[8]  C. S. Chang,et al.  Designs synthesis of resonant fault current limiter for voltage sag mitigation and current limitation , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).