Title :
A novel double-bridge PWM static VAr compensator
Author :
Yanchao, Ji ; Yongxuan, Hu ; Zhuo, Liu ; Zhonggui, Tang ; Xueyi, Wang
Author_Institution :
Dept. of Electr. Eng., Harbin Inst. of Technol., China
Abstract :
A novel double-bridge PWM static VAr compensator (DB-PSVC) is presented in this paper. Theoretical analysis shows that the harmonic pairs of [(2k+1)fg±f] generated in each bridge are effectively eliminated through phase shift control. To satisfy the same 5% total harmonic distortion (THD) requirement, this new structure can work at 650 Hz, which is much lower than the previously reported 1.9 kHz of a single-bridge PSVC. The efficiency is increased and reliability enhanced. The fairly low switching frequency facilitates its use in high power applications since gate turn-off thyristors (GTOs) can be employed as power switches. The proposed concept is verified through simulations and experimental results on a 10 kVA prototype
Keywords :
PWM power convertors; bridge circuits; harmonic distortion; power semiconductor switches; power system harmonics; static VAr compensators; switching circuits; thyristor convertors; 1.9 kHz; 10 kVA; 650 Hz; GTO power switches; double-bridge PWM static VAr compensator; harmonic pairs elimination; high power applications; switching frequency; total harmonic distortion; Capacitors; Control systems; Power harmonic filters; Power system harmonics; Power system reliability; Pulse width modulation; Static VAr compensators; Switches; Thyristors; Voltage control;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-2775-6
DOI :
10.1109/IECON.1996.565963
