Title :
Study on the impedance-frequency characteristic of HVDC converter under asymmetric faults in the AC system
Author :
Zhikeng, Li ; Gang, Wang ; Haifeng, Li ; Xiaolin, Li ; Chuang, Fu
Author_Institution :
Dept. of Electr. Eng., SCUT, Guangzhou, China
Abstract :
In a HVDC transmission system, faults occur in the AC system can result in the variation of impedance-frequency characteristic of the HVDC converter. In this paper, an advanced switching function model of HVDC converter, which considers the effect of the interactions between the AC and DC system and the unbalanced operating conditions of the converter, is presented. Based on this model, a method for calculation of the impedance-frequency characteristic of the HVDC converter under the asymmetric faults conditions is proposed. The method is verified by comparison with the results obtained from calculation and digital simulation using PSCAD/EMTDC.
Keywords :
HVDC power convertors; HVDC power transmission; power transmission faults; switching convertors; AC system asymmetric faults; HVDC converter switching function model; HVDC transmission system; PSCAD/EMTDC digital simulation; impedance-frequency characteristics; Analog-digital conversion; Equations; Frequency conversion; HVDC transmission; Impedance; Power harmonic filters; Resonance; Switching converters; Valves; Voltage; HVDC converter; asymmetric faults; impedance-frequency characteristic; switching functions;
Conference_Titel :
Power & Energy Society General Meeting, 2009. PES '09. IEEE
Conference_Location :
Calgary, AB
Print_ISBN :
978-1-4244-4241-6
DOI :
10.1109/PES.2009.5275698
