Title :
Direct power control system under unbalanced network voltage
Author :
Zhao, Zhangfei ; Han, Yaofei ; Fan, Xiaohong
Author_Institution :
Dept. of Electr. & Electron. Eng., Henan Univ. of Urban Constr., Pingdingshan, China
Abstract :
Based on the mathematical model of the three-level PWM rectifier, its power mathematical model was obtained by combining with instantaneous power theory. And the power expression was obtained by analyzing the rectifier under unbalanced network voltage. On this basis, the DPC-SVM control strategy to restrain the negative sequence components of the three-phase current on AC side under unbalanced network voltage was proposed. The simulation results and experiment tests show that the control strategy mentioned above can restrain the negative sequence components on AC side effectively.
Keywords :
PWM rectifiers; power control; DPC-SVM control strategy; direct power control system; instantaneous power theory; mathematical model; negative sequence components; three-level PWM rectifier; unbalanced network voltage; Harmonic analysis; Power harmonic filters; Pulse width modulation; Reactive power; Rectifiers; Voltage control; DPC-SVM; the inhibition of negative sequence components on AC side; three-level; unbalanced;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2011 International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4244-8162-0
DOI :
10.1109/ICECENG.2011.6057132
