Current-limiting Characteristics of a Modified Flux-coupling Type Superconducting Fault Current Limiter and Its Effects on the Transient Stability of a Multi-machine Power System*

doi:10.23919/CJEE.2021.000019

Chinese Journal of Electrical Engineering ›› 2021, Vol. 7 ›› Issue (2): 93-102.doi: 10.23919/CJEE.2021.000019

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Current-limiting Characteristics of a Modified Flux-coupling Type Superconducting Fault Current Limiter and Its Effects on the Transient Stability of a Multi-machine Power System^*

Yonghui He^1,*, Langheng Cao², Feng Zheng³

1. Department of Automation Engineering, Fujian Polytechnic of Information Technology, Fuzhou 350003, China;
2. China Energy Construction Group Guangdong Electric Power Design and Research Institute Co., Ltd., Guangzhou 510663, China;
3. School of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China

Received:2020-04-22 Revised:2020-08-23 Accepted:2021-03-16 Online:2021-06-25 Published:2021-07-08
Contact: * E-mail: auto_mitu@163.com
About author:Yonghui He was born in Qian Jiang, Hubei, China in 1979. He received the B.S. degree in mechanical and electrical engineering from Wuhan University of Technology, China, in 2000, and the M.S. degree in mechanical and electrical engineering from Fuzhou University, China, in 2006. Currently, he is a associate professor in Department of Automation Engineering at Fujian Polytechnic of Information Technology. His main research interests include electromechanical system identification and intelligent control, and electrical system operation and control.
Langheng Cao was born in Guangzhou, Guangdong, China in 1979. He received the B.S. degree in electric power system and automation from South China University, China, in 2001. Currently, he is a senior engineer in China Energy Construction Group Guangdong Electric Power Design and Research Institute Co., Ltd. His main research interests include electromechanical system identification and DC power grid current limiting technology.
Feng Zheng was born in Wenzhou, Zhejiang Province, China in 1983. He received the B.S. degree in automation and received the M.S. degree in electric power system and automation from the School of Electrical and Information, Three Gorges University, in 2006 and in 2009. He received the P.h.D degree in electric power system and automation at Wuhan University, in 2017. Since July 2017, he has been a teacher with the School of Electrical Engineering and Automation, Fuzhou University. His research interests include micro-grid and superconducting fault current limiter.
Supported by:
* Fujian Young and Middle-Aged Teachers' Science and Technology Research Project(JAT201101).

Abstract

Abstract: ：A modified flux-coupling type superconducting fault current limiter (SFCL) is proposed here for suppressing fault currents. The modified SFCL consists of a coupling transformer, an yttrium barium copper oxide (YBCO) pancake coil, and a controlled switch. By flexibly adjusting the controlled switch's contact states based on the system operational conditions, the coupling transformer's primary inductance as well as the YBCO coil's normal-state resistance are incorporated into the main system for current limitation. Because the modified SFCL has the advantages of resistive and inductive SFCLs, it may improve the power system's transient behavior. Hence, the SFCL's effect on the transient stability of a multi-machine power system was also theoretically investigated. Further, simulations were conducted for accessing the SFCL's performance characteristics under different fault conditions. The results show that using the proposed SFCL can effectively restrain the increased fault current and improve the bus voltage sag; meanwhile, the imitated multi-machine system's power-angle oscillation can be obviously reduced.

Key words: Current-limiting characteristics, flux-coupling type SFCL, multi-machine power system, transient stability

Yonghui He, Langheng Cao, Feng Zheng. Current-limiting Characteristics of a Modified Flux-coupling Type Superconducting Fault Current Limiter and Its Effects on the Transient Stability of a Multi-machine Power System^*[J]. Chinese Journal of Electrical Engineering, 2021, 7(2): 93-102.

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Current-limiting Characteristics of a Modified Flux-coupling Type Superconducting Fault Current Limiter and Its Effects on the Transient Stability of a Multi-machine Power System^*

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