Improved High current source of Synthetic Test Circuit for HVDC thyristor valve

Author

Jung, J.H. ; Kim, H.S. ; Koo, B.J. ; Kim, J.H. ; Nho, E.C. ; Han, B.M. ; Chung, Y.H. ; Baek, S.T.

Author_Institution

Dept. of Electr. Eng., Pukyong Nat. Univ., Busan, South Korea

fYear

2015

fDate

1-5 June 2015

Firstpage

2838

Lastpage

2843

Abstract

Synthetic Test Circuit (STC) system for thyristor valve of current-type High Voltage Direct Current (HVDC) typically consists of a low-voltage high-current and a high-voltage low-current source. In order to provide the isolation between each source, auxiliary valve should be inserted, and its voltage and current ratings are greater or equal to those of the test thyristor valve. To ensure the turnoff of that auxiliary valve additional voltage source is necessary to apply reverse voltage to the auxiliary valve at turn-off instant. This paper describes a new high-current source to minimize turn-off time of the auxiliary valve. The proposed system consists of two chopper, auxiliary valve, auxiliary IGBT, diode, resistor, and capacitor. Computer simulation and experimental results show the validity of the proposed scheme.

Keywords

HVDC power convertors; testing; thyristor applications; HVDC thyristor valve; auxiliary valve; current type high voltage direct current; high current source; reverse voltage; source isolation; synthetic test circuit; turn-off time minimization; voltage source; Capacitors; Choppers (circuits); HVDC transmission; Insulated gate bipolar transistors; Resistors; Thyristors; Valves; High Voltage Direct Current (HVDC); Synthetic Test Circuit (STC); Thyristor Valve; Two Phase Chopper;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015 9th International Conference on

Conference_Location

Seoul

Type

conf

DOI

10.1109/ICPE.2015.7168174

Filename

7168174