Title :
Comparison of multilevel inverters for static VAr compensation
Author :
Hochgraf, Clark ; Lasseter, Robert ; Divan, Deepak ; Lipo, T.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
Inverter-based static VAr compensators (SVCs) can benefit from the use of a multilevel invertor structure which allows the elimination of the step-up transformer. The inherent high quality of the multistep waveform allows operation without PWM, thus high switching losses are avoided. This paper discusses the issues affecting the application of multilevel invertor structures as reactive power compensators and compares the device MVA and reactive component MVA requirements of two topologies that have been presented in prior literature. The modulation strategy strongly affects the voltage balancing in the DC bus capacitors as well as their ripple current rating and capacitance value
Keywords :
circuit analysis computing; compensation; digital simulation; invertors; power capacitors; power engineering computing; reactive power; software packages; static VAr compensators; switching circuits; DC bus capacitors; MVA requirements; SVC; capacitance value; modulation strategy; multilevel inverters; multistep waveform; reactive power compensators; ripple current rating; static VAr compensation; switching losses; topologies; voltage balancing; Capacitors; Power harmonic filters; Power system harmonics; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Reactive power; Static VAr compensators; Thyristors; Voltage control;
Conference_Titel :
Industry Applications Society Annual Meeting, 1994., Conference Record of the 1994 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-1993-1
DOI :
10.1109/IAS.1994.377528
