Fault location of three-core power distribution cables based on lump-parameter model considering conductor couplings

TY - JOUR

T1 - Fault location of three-core power distribution cables based on lump-parameter model considering conductor couplings

AU - Peng, Nan

AU - Zhang, Peng

AU - Liang, Rui

AU - Guo, Zhenhua

AU - Hu, Yihua

AU - Li, Wei

AU - Sheng, Yuan

N1 - Funding Information: This research is supported by Outstanding Innovation Scholarship for Doctoral Candidate of CUMT, 2019YCBS051.

PY - 2021/9

Y1 - 2021/9

N2 - Due to the poor working conditions, the three-core distribution cables are prone to faults. Since most of the cables are laid underground, accurate fault location is difficult. Considering the couplings between the earth screen and core conductors, a lump-parameter model of the three-core cable is constructed in this paper. Through the steady-state circuit analysis, a method for identifying and locating a fault in the three-core cable is proposed. In the method, the information of the grounding line current, core current and voltage phasors at both terminals in normal operation are firstly used to compensate the synchronous measurement error. Then, the fault current is derived by the phase-corrected phasors in fault condition to identify the fault conductor. Finally, the accurate fault distance is computed by employing the fault voltage continuity criterion. A three-core distribution cable model is created by RTDS and various fault simulations are conducted. The results demonstrate the effectiveness of the method under different fault conditions.

AB - Due to the poor working conditions, the three-core distribution cables are prone to faults. Since most of the cables are laid underground, accurate fault location is difficult. Considering the couplings between the earth screen and core conductors, a lump-parameter model of the three-core cable is constructed in this paper. Through the steady-state circuit analysis, a method for identifying and locating a fault in the three-core cable is proposed. In the method, the information of the grounding line current, core current and voltage phasors at both terminals in normal operation are firstly used to compensate the synchronous measurement error. Then, the fault current is derived by the phase-corrected phasors in fault condition to identify the fault conductor. Finally, the accurate fault distance is computed by employing the fault voltage continuity criterion. A three-core distribution cable model is created by RTDS and various fault simulations are conducted. The results demonstrate the effectiveness of the method under different fault conditions.

KW - Fault location

KW - Lump-parameter model

KW - Mutual coupling

KW - Three-core cables

UR - http://www.scopus.com/inward/record.url?scp=85102851058&partnerID=8YFLogxK

U2 - 10.1016/j.ijepes.2021.106953

DO - 10.1016/j.ijepes.2021.106953

M3 - Article

AN - SCOPUS:85102851058

SN - 0142-0615

VL - 130

JO - International Journal of Electrical Power and Energy Systems

JF - International Journal of Electrical Power and Energy Systems

M1 - 106953

ER -