Modeling of the HVDC convertor using dynamic phasor under asymmetric faults in the AC system

Author

Gang, Wang ; Zhikeng, Li ; Haifeng, Li ; Xiaolin, Li ; Chuang, Fu

Author_Institution

Dept. of Electr. Eng., SCUT, Guangzhou, China

fYear

2009

fDate

6-7 April 2009

Firstpage

1

Lastpage

5

Abstract

This paper presents a modeling technique to the HVDC converter under asymmetric conditions using the dynamic phasor. A detailed analysis of the dynamic processes of HVDC converter when asymmetric faults occur in the ac system, including variation of switching instants and unbalanced commutation overlaps is presented. Based on which, an advanced dynamic phasors model for HVDC converters is proposed, which is more suitable for the fault characteristic simulation in large scale HVDC transmission system under asymmetric ac faults. It is verified to be accurate and effective by comparison with results obtained from digital simulation of the detailed electromagnetic transient model of Guiguang II HVDC system in China.

Keywords

HVDC power convertors; HVDC power transmission; fault diagnosis; Guiguang II HVDC system; HVDC convertor; asymmetric ac faults; dynamic phasor; electromagnetic transient model; fault characteristic simulation; large scale HVDC transmission system; switching instants variation; Acceleration; Analog-digital conversion; Control design; Electromagnetic modeling; HVDC transmission; Power system modeling; Stability analysis; Switching converters; Transient analysis; Valves; Asymmetric faults; Dynamic phasors; HVDC;

fLanguage

English

Publisher

ieee

Conference_Titel

Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-4934-7

Type

conf

DOI

10.1109/SUPERGEN.2009.5348351

Filename

5348351