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SummaryA control Scheme for the voltage-sourced PWM-rectifier based on space vector equations is introduced. The main advantages of this new control strategy is that almost sinusoidal line currents are achieved even in dynamical state without current measurement at all. Conventionally, chokes are connected between mains and the converter bridge of the pulse width modulated (PWM) rectifier. In this paper a new LCL-type line filter strategy is introduced to further reduce the line current distortion and the cost of the equipment. Despite that the number of components is increased, the total reactance of an LCL-filter can be made much smaller compared with the conventional line filter. In addition to simulations, the new control scheme and filter was also tested with a prototype. the output power limits of which are ± 100 kW.Key Words: pulse width modulationrectifiers Additional informationNotes on contributorsJ. OllilaJ. OllilaDoctorate degree in Electrical Engineering from Tampere University of Technology (Finland). Currently working as an Assistant Professor at TUT. His research interests include applied electronics, different types of PWM-converiers. power conversion in solar systems, control system design and system level simulation in power electronics.(Tampere University of Technoology, Power electronics, P.O.B. 692, FIN-33 101 Tampere, Finland)
J. Ollila (Wed,) studied this question.