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| An Improved Series-Resonant Type Fault Current Limiter |
| Zhang Zhifeng1,Xiao Liye1,Qiu Qingquan1,Cheng Gang2,Tian Zhong2,Wang Na2,Dai Shaotao1 |
1. Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China;
2. Dandong Xintai Electric Co. Ltd Dandong 118006 China |
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Abstract The principal technological of series-resonant type fault current limiter(SRFCL) to limit short-circuit current is bypassing the capacitor. In this paper, by introducing double-splitting reactor to change the bypassing method of capacitor,the topology of SRFCL is improved. Firstly, the working principle of improved SRFCL is analyzed theoretically, and the impedance variation characteristics of the double-split reactor is also studied in detail. For double-splitting reactor, the self-inductance of the winding can effect on the series-resonant relationship in steady state, the leakage inductance of the winding can enhance the limiting capability of SRFCL and suppress the over-current of capacitor in fault current limiting process. Through the modeling and simulation, the relationship between the leakage inductance of the winding and the current frequency and amplitudeis studied, and the relationship between the residual voltages of MOV1 and MOV2, and the currents of line and the capacitor are also studied. At last, based on the parameter optimization, a 400V prototype of SRFCL is designed and manufactured. Test results show that double-split reactor can enhance the reliability and fault current limiting capability of SRFCL.
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Received: 01 September 2014
Published: 10 April 2015
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2015, Vol. 30 
