Title :
Study of overvoltages on ±800 kV UHVDC transmission system
Author :
Jie, Zhao ; Gang, Wang ; Kai, Yin ; Li Haifeng
Author_Institution :
Coll. of Electr. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
This paper investigates the causes and characteristics of the overvoltage of ±800 kV UHVDC transmission system under operation and fault conditions, and the factors which influence the overvoltage level. A complete simulation model is built based on the design aspect of the upcoming Yun-Guang UHVDC Transmission System scheme by PSCAD/EMTDC. The overvoltages under various conditions are calculated. By comparing with ±500 kV HVDC transmission system, the particular characteristic of the overvoltage of UHVDC transmission system is summarized. Based on this, the basic rules for insulation margin and insulation level are given. The effect methods to prevent and limit overvoltage are discussed, and some beneficial results are obtained.
Keywords :
HVDC power transmission; insulation; overvoltage protection; power system CAD; power system simulation; power transmission faults; power transmission protection; -500 to 500 kV; -800 to 800 kV; PSCAD-EMTDC simulation; Yun-Guang UHVDC transmission system; fault condition; insulation level; overvoltage characteristics; overvoltage prevention;
Conference_Titel :
AC and DC Power Transmission, 2006. ACDC 2006. The 8th IEE International Conference on
Conference_Location :
IET
Print_ISBN :
0-86341-613-6
