TY - JOUR
T1 - A Novel Topology of a Liquid Metal Current Limiter for MVDC Network Applications
AU - Yang, Zhuo
AU - He, Hailong
AU - Yang, Fei
AU - Wu, Yi
AU - Rong, Mingzhe
AU - Zhao, Peng
AU - Lv, Siyu
AU - Wan, Qing
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2019/4
Y1 - 2019/4
N2 - A liquid metal current limiter (LMCL) utilizing a fast switch and a parallel connecting path and consisting of several serial current limiting elements (CLEs) has the potential for use in a dc system. The current commutation ability is vital to the reaction time and the current limiting efficiency of this LMCL. In this paper, the characteristics of a natural current commutation driven by the arc voltage between contacts are first revealed; this method can only be applied in a low-voltage system. To fulfill the demands of a medium-voltage direct current system, an innovative LMCL topology is recommended due to the forced current commutation driven by an auxiliary magnetic induction module. A specially designed structure of magnetic coupling coils with a high coupling coefficient is proposed to improve the current commutation ability. The forced current commutation characteristic is analyzed via simulation and verified experimentally. Furthermore, the arc V-I characteristics of CLEs are deeply discussed to guide the selection of serial quantity of the CLE. Finally, a prototype for the complete LMCL is designed, assembled, and tested in the laboratory. The current limiting coefficient of the LMCL is less than 0.464, the peak value of arc voltage is approximately 6.3 kV, and the current limiting reaction time is 1.53 ms.
AB - A liquid metal current limiter (LMCL) utilizing a fast switch and a parallel connecting path and consisting of several serial current limiting elements (CLEs) has the potential for use in a dc system. The current commutation ability is vital to the reaction time and the current limiting efficiency of this LMCL. In this paper, the characteristics of a natural current commutation driven by the arc voltage between contacts are first revealed; this method can only be applied in a low-voltage system. To fulfill the demands of a medium-voltage direct current system, an innovative LMCL topology is recommended due to the forced current commutation driven by an auxiliary magnetic induction module. A specially designed structure of magnetic coupling coils with a high coupling coefficient is proposed to improve the current commutation ability. The forced current commutation characteristic is analyzed via simulation and verified experimentally. Furthermore, the arc V-I characteristics of CLEs are deeply discussed to guide the selection of serial quantity of the CLE. Finally, a prototype for the complete LMCL is designed, assembled, and tested in the laboratory. The current limiting coefficient of the LMCL is less than 0.464, the peak value of arc voltage is approximately 6.3 kV, and the current limiting reaction time is 1.53 ms.
KW - Fault current limiters (FCLs)
KW - GaInSn liquid metal
KW - current commutation
KW - medium-voltage direct current (MVDC)
UR - https://www.scopus.com/pages/publications/85063507102
U2 - 10.1109/TPWRD.2019.2892501
DO - 10.1109/TPWRD.2019.2892501
M3 - 文章
AN - SCOPUS:85063507102
SN - 0885-8977
VL - 34
SP - 661
EP - 670
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
IS - 2
M1 - 8610233
ER -