TY - GEN
T1 - A new longitudinal protection of hybrid bipolar DC transmission lines using transient current
AU - Gao, Shuping
AU - Zhu, Hangjian
AU - Niu, Dan
AU - Zhang, Baohui
AU - Song, Guobing
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/7/2
Y1 - 2018/7/2
N2 - In recent years, hybrid DC transmission systems consisting of traditional HVDC transmission and flexible DC transmission have become hot topics. In this paper, the fault additional state of the hybrid bipolar DC transmission system is analyzed. According to the analysis results, it can be obtained that when the fault occurs in the DC transmission line, the direction of the transient current of the rectifier side and the inverter side is the same as the reference direction; when the fault occurs beyond the DC transmission line, the direction of the transient current of the rectification side and the inverter side is is opposite. It is also stipulated that when the current direction is the same as the reference direction, the phase is 0°, and the phase is opposite to the reference direction, and the phase is -180°. According to this feature, the protection principle of distinguishing internal or external fault in the line by using the phase difference of the transient currents on both sides of the line is proposed, and the phase information is extracted by Hilbert transform. In addition, since the variation of transient current of fault line is much larger than that of transient current of not-fault line, the transient current of the positive polar rectifier side and the transient current of the negative polar rectifier side are integrated to construct the energy function to perform the fault polar selection in this paper. Finally, the model of hybrid bipolar direct current transmission is established by PSCAD, and the fault simulation is carried out. Protection algorithm is carried out in MATLAB. A large number of simulation results show that the protection principle can quickly and effectively identify internal or external fault, and identify the fault pole. The method has high reliability.
AB - In recent years, hybrid DC transmission systems consisting of traditional HVDC transmission and flexible DC transmission have become hot topics. In this paper, the fault additional state of the hybrid bipolar DC transmission system is analyzed. According to the analysis results, it can be obtained that when the fault occurs in the DC transmission line, the direction of the transient current of the rectifier side and the inverter side is the same as the reference direction; when the fault occurs beyond the DC transmission line, the direction of the transient current of the rectification side and the inverter side is is opposite. It is also stipulated that when the current direction is the same as the reference direction, the phase is 0°, and the phase is opposite to the reference direction, and the phase is -180°. According to this feature, the protection principle of distinguishing internal or external fault in the line by using the phase difference of the transient currents on both sides of the line is proposed, and the phase information is extracted by Hilbert transform. In addition, since the variation of transient current of fault line is much larger than that of transient current of not-fault line, the transient current of the positive polar rectifier side and the transient current of the negative polar rectifier side are integrated to construct the energy function to perform the fault polar selection in this paper. Finally, the model of hybrid bipolar direct current transmission is established by PSCAD, and the fault simulation is carried out. Protection algorithm is carried out in MATLAB. A large number of simulation results show that the protection principle can quickly and effectively identify internal or external fault, and identify the fault pole. The method has high reliability.
KW - Fault Network Analysis Method
KW - Hilbert transform
KW - Hybrid Bipolar HVDC System
KW - Pilot protection
KW - Transient current
UR - https://www.scopus.com/pages/publications/85063220384
U2 - 10.1109/IS3C.2018.00035
DO - 10.1109/IS3C.2018.00035
M3 - 会议稿件
AN - SCOPUS:85063220384
T3 - Proceedings - 2018 International Symposium on Computer, Consumer and Control, IS3C 2018
SP - 109
EP - 112
BT - Proceedings - 2018 International Symposium on Computer, Consumer and Control, IS3C 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 4th International Symposium on Computer, Consumer and Control, IS3C 2018
Y2 - 6 December 2018 through 8 December 2018
ER -