TY - GEN
T1 - Analysis of statistical and frequency characteristics of transient overvoltage of hybrid cable-OHL lines
AU - Li, Jiaming
AU - Xu, Long
AU - Chen, Xi
AU - Zhao, Aixuan
AU - Liu, Jian
AU - Zhao, Xuefeng
AU - Deng, Junbo
AU - Zhang, Guanjun
N1 - Publisher Copyright:
© 2018 IEEE
PY - 2018/12/27
Y1 - 2018/12/27
N2 - Since increasingly more cables are adopted in distribution line, more hybrid cable-OHL lines are used in distribution network. Due to the difference of impedance and admittance of hybrid line compared with pure OHL, the energy redistribution is affected during line re-energization. This presentation focuses on the transient overvoltage during line re-energization with the use of EMT-type program. Firstly, due to the randomness of closing timings of circuit breaker, statistical distribution of reclosing overvoltage is studied. It is found that most severe overvoltage appears when cable share is 20%. Moreover, the most severe overvoltage can reach up to more than 3p.u, and its dominant frequency is 20.67 kHz. Furthermore, the influence of source network on the characteristic of reclosing overvoltage is studied as well. This work has reference value on insulation coordination and reclosing strategy in hybrid cable-OHL line.
AB - Since increasingly more cables are adopted in distribution line, more hybrid cable-OHL lines are used in distribution network. Due to the difference of impedance and admittance of hybrid line compared with pure OHL, the energy redistribution is affected during line re-energization. This presentation focuses on the transient overvoltage during line re-energization with the use of EMT-type program. Firstly, due to the randomness of closing timings of circuit breaker, statistical distribution of reclosing overvoltage is studied. It is found that most severe overvoltage appears when cable share is 20%. Moreover, the most severe overvoltage can reach up to more than 3p.u, and its dominant frequency is 20.67 kHz. Furthermore, the influence of source network on the characteristic of reclosing overvoltage is studied as well. This work has reference value on insulation coordination and reclosing strategy in hybrid cable-OHL line.
KW - Cable-OHL line
KW - Frequency characteristic
KW - Line re-energization
KW - Source network
KW - Statistical characteristic
KW - Transient overvoltage
UR - https://www.scopus.com/pages/publications/85063137085
U2 - 10.1109/CICED.2018.8592463
DO - 10.1109/CICED.2018.8592463
M3 - 会议稿件
AN - SCOPUS:85063137085
T3 - China International Conference on Electricity Distribution, CICED
SP - 2650
EP - 2654
BT - 2018 China International Conference on Electricity Distribution, CICED 2018 - Proceedings
PB - IEEE Computer Society
T2 - 2018 China International Conference on Electricity Distribution, CICED 2018
Y2 - 17 September 2018 through 19 September 2018
ER -