Title :
STATCOM ETO Failure Analysis
Author :
Du, Zhong ; Chen, Bin ; Han, Chong ; Yang, Zhaoning ; Song, Wenchao ; Bhattacharya, Subhashish ; Huang, Alex Q.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC
Abstract :
Emitter turn-off (ETO) thyristor based static synchronous compensator (STATCOM) is one of the promising flexible AC transmission system (FACTS) technologies, and it is gaining more popularity in utility grids. A 4.5 MVA ETO based STATCOM failed two ETO devices as over-voltage protection triggered AC connector and disconnected the STATCOM from AC grid supply. This paper presents the investigation of ETO failure reasons. The investigation found that dead time of switching signals is very critical for ETO applications. Protection methods for high power ETO applications are proposed based on failure investigation. Experiments verified the proposed protection method
Keywords :
failure analysis; flexible AC transmission systems; overvoltage protection; power grids; static VAr compensators; thyristor applications; STATCOM ETO failure analysis; emitter turn-off thyristor; flexible AC transmission system; over-voltage protection; static synchronous compensator; utility grids; Automatic voltage control; Failure analysis; ETO device; STATCOM; failure analysis;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778238
