DocumentCode :
1701225
Title :
Fault analysis of transmission lines for two HVDC systems on the same tower
Author :
Min, Huang ; Gang, Wang ; Haifeng, Li
Author_Institution :
Dept. of Electr. Eng., South China Univ. of Technol., Guangzhou, China
Volume :
2
fYear :
2011
Firstpage :
1029
Lastpage :
1033
Abstract :
Owing to more fault types in the of two bipole lines (TBL) rather than single circuit line, and there is mutual influence between the two DC circuits on the same tower. Furthermore, being susceptible to the grounded fault loop impedance, the traditional traveling wave protection cannot satisfy the demand of reliability and sensitivity on the dc line protection of fault pole selection for two ±500kV HVDC systems on the same tower. So, the fault analysis with the phase-mode transformation (PMT) method for double-circuit transmission lines on the same tower is discussed. Considering a more practical case, the mutual influence of electromagnetic coupling between the double HVDC circuits is discussed firstly. A PMT method of TBL on the same tower is proposed to decouple the phase (or named pole) network equation and build the four fault modal (one ground-mode and three line-modes) networks. After that, the theoretic analysis is discussed on different dc line faults, especially electromagnetic decoupling of double circuits and bipolar dc lines, and propagation characteristic fault waves. The simulation model of the two ±500kV HVDC systems erected on the same tower is established by the PSCAD/EMTDC software and extensive simulations are performed to analysis fault signature of transmission lines.
Keywords :
HVDC power transmission; electromagnetic coupling; poles and towers; power transmission faults; power transmission lines; power transmission reliability; DC circuits; HVDC circuits; HVDC systems; PMT method; PSCAD-EMTDC software; TBL; bipolar DC lines; dc line protection; double-circuit transmission lines; electromagnetic coupling; electromagnetic decoupling; fault modal network; fault pole selection; grounded fault loop impedance; phase network equation; phase-mode transformation method; propagation characteristic fault waves; reliability; sensitivity; single-circuit line; theoretic analysis; tower; transmission line analysis fault signature; traveling wave protection; two-bipole lines; Circuit faults; HVDC transmission; Impedance; Integrated circuit modeling; Poles and towers; Power transmission lines; HVDC transmission line; double circuit on the same tower; phase-mode transformation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Power System Automation and Protection (APAP), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-9622-8
Type :
conf
DOI :
10.1109/APAP.2011.6180700
Filename :
6180700
Link To Document :
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