Title :
A multilevel converter-based universal power conditioner
Author :
Tolbert, Leon M. ; Peng, Fang Zheng ; Habetler, Thomas G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Tennessee Univ., Knoxville, TN, USA
Abstract :
This paper presents the development of a control scheme for a multilevel diode-clamped converter connected in a series-parallel fashion to the electrical system such that it can compensate for deviations in utility voltage (sag, surge, and unbalance) and act as a harmonic and/or reactive current source for a load. New carrier-based multilevel pulsewidth modulation techniques are identified to maximize switch utilization of the two back-to-back diode-clamped inverters that constitute the universal power conditioner. An experimental verification for a six-level power conditioner is given
Keywords :
DC-AC power convertors; PWM invertors; compensation; power conversion harmonics; power factor correction; power harmonic filters; power system faults; reactive power; switching circuits; back-to-back diode-clamped inverters; carrier-based multilevel PWM techniques; control scheme development; harmonic current source; multilevel diode-clamped converter; reactive current source; sag compensation; series-parallel connection; six-level power conditioner; surge compensation; switch utilization; unbalance compensation; universal power conditioner; utility voltage deviations; Control systems; Diodes; Power filters; Pulse inverters; Pulse modulation; Pulse width modulation converters; Pulse width modulation inverters; Switches; Voltage control; Voltage fluctuations;
Journal_Title :
Industry Applications, IEEE Transactions on
