Abstract
This paper presents the comparison of dynamic performance and steady state operation of PMSG wind energy conversion systems with two modulation techniques. Voltage oriented control (VOC) is used for grid-connected converter along with sinusoidal pulse width modulation (SPWM) and Space Vector Modulation (SVM) schemes. The generator is controlled by using zero d- axis current (ZDC) control scheme along with optimal torque control (OTC). Performance comparison with two pulse width modulation schemes through simulation results are presented for 2MW/ 690V/ 9.75Hz Non-Salient Pole PMSG using MATLAB/SIMULINK.
Highlights
Due to exhausting fossil fuels, raise in cost and global warming, renewable energy sources have turned up as a new criterion to fulfill the energy needs of our society [6]
The two main electrical components of the Wind Energy Conversion Systems (WECS) are power converter and generator. Various schemes of these two components show the way to a broad variety of WECS configurations, which can be classified into three groups: (1) fixed-speed WECS without power converter interface, (2) WECS using reduced-capacity converters, and (3) full-capacity converter operated WECS [3].Amongst the prevailing WECSs, its generators are classified into four types [2]: the doubly fed induction generator(DFIG), the squirrel cage induction generator(SCIG), the wound rotor synchronous generator(WRSG) and the Permanent Magnet Synchronous Generator (PMSG)
These days, the WECS with PMSG is used for direct grid- connection because it has no slip ring maintenance and gives higher efficiency
Summary
Due to exhausting fossil fuels, raise in cost and global warming, renewable energy sources have turned up as a new criterion to fulfill the energy needs of our society [6]. Various schemes of these two components show the way to a broad variety of WECS configurations, which can be classified into three groups: (1) fixed-speed WECS without power converter interface, (2) WECS using reduced-capacity converters, and (3) full-capacity converter operated WECS [3].Amongst the prevailing WECSs, its generators are classified into four types [2]: the doubly fed induction generator(DFIG), the squirrel cage induction generator(SCIG), the wound rotor synchronous generator(WRSG) and the PMSG These days, the WECS with PMSG is used for direct grid- connection because it has no slip ring maintenance and gives higher efficiency. The key objectives of paper are to implement the VOC with a decoupling controller for the grid-connected converter; to design sinusoidal pulse width modulation and space vector modulation schemes for grid- and generator-connected converters; and to implement ZDC control scheme for full-scale power converter based variable-speed, direct-drive non-salient PMSG WECS
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