Title :
A multilevel converter-based universal power conditioner
Author :
Tolbert, Leon M. ; Peng, Fang Z. ; Habetler, Thomas G.
Author_Institution :
Oak Ridge Nat. Lab., 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 and act as a harmonic and/or reactive current source for a load. Simulation results are given for the real-time control scheme when applied to a 5-level converter for different combinations of the following power conditioning objectives: sag compensation, voltage balancing, current harmonic compensation, and reactive power compensation. Level usage in the series inverter and parallel inverter is analyzed for the different compensation objectives, and a method to maximize level usage at low modulation indices is highlighted
Keywords :
compensation; invertors; power system harmonics; reactive power; 5-level converter; control scheme; current harmonic compensation; electrical system; harmonic current source; level usage maximisation; low modulation indices; multilevel converter; multilevel diode-clamped converter; parallel inverter; power conditioning; reactive current source; reactive power compensation; real-time control; sag compensation; series inverter; series-parallel connection; universal power conditioner; utility voltage deviations compensation; voltage balancing; Active filters; Control systems; Diodes; Government; Inverters; Power harmonic filters; Power system harmonics; Reactive power control; Voltage control; Voltage fluctuations;
Conference_Titel :
Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
0-7803-5421-4
DOI :
10.1109/PESC.1999.789035
