Title :
Minimum harmonics PWM control for a self-commutated SVC
Author :
Suzuki, Kenichi ; Nakajima, Tatsuhito ; Ueda, Shigeta ; Eguchi, Yoshio
Author_Institution :
Tokyo Elec. Power Co., Tokyo, Japan
Abstract :
To maintain voltage stability in electric power systems, self-commutated static VAr compensators (self-commutated SVCs) employing high power gate turn-off thyristors (GTOs) have been developed. This paper presents a lower harmonic two-pulse PWM control technique which can decrease the harmonics in output voltage by selecting switching angles. Because of the lower GTO switching frequency, high efficiency power converters can be obtained. The decreased harmonics by the proposed PWM control were confirmed by numerical analysis and experiments using small-scale equipment. The technique has been applied to a 50 MVA self-commutated SVC which has been installed in the Shinshinano substation of Tokyo Electric Power Company, and field testing of this equipment is now in progress.<>
Keywords :
commutation; compensation; power system control; power system harmonics; power system stability; pulse width modulation; reactive power; static VAr compensators; substations; switching circuits; thyristor applications; voltage control; 50 MVA; GTOs; Japan; PSS; PWM; SVC; efficiency; gate turn-off thyristors; harmonics; numerical analysis; power converters; power systems; reactive power compensation; self-commutation; static VAr compensators; substation; switching angles; switching frequency; voltage stability; Numerical analysis; Power system harmonics; Power system stability; Pulse width modulation; Static VAr compensators; Substations; Switching converters; Switching frequency; Thyristors; Voltage control;
Conference_Titel :
Power Conversion Conference, 1993. Yokohama 1993., Conference Record of the
Conference_Location :
Yokohama, Japan
Print_ISBN :
0-7803-0471-3
DOI :
10.1109/PCCON.1993.264185
