TITLE

Control methods for PWM rectifier cooperating with variable speed PM generator

AUTHOR(S)
MAZGAJ, WITOLD; SZULAR, ZBIGNIEW; WĘGIEL, TOMASZ
PUB. DATE
December 2013
SOURCE
Problems of Improving the Efficiency of Infrastructure;2013, Vol. 23 Issue 4, p495
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The paper deals with cooperation between pulse width modulation (PWM) rectifier and variable speed synchronous generator which is applied especially in small water or wind plants. In such applications, the synchronous generator, which is usually permanent magnet (PM) generator, rotates at a variable speed which depends on water or wind energy. Therefore, this energy should be converted to the parameters of the three-phase power grid with the use of a power electronic unit. The main aim of the control strategy is to transfer a maximum possible amount of energy produced by the water turbine or the wind turbine connected to a synchronous generator. The second purpose of the control method is to decrease the amount of higher harmonics of generator currents. The paper describes two basic methods which are used in control systems of the PWM rectifiers. The first one is the sinusoidal PWM method, and the second method relates to the hysteresis switching of the PWM rectifier transistors. A significant part of the paper is devoted to control principles of the PWM rectifier which cooperates with a variable speed PM synchronous generator. Special attention is paid to higher harmonics of PM generator currents with respect to individual methods.
ACCESSION #
94766716

 

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