Real and Reactive Power Control of SEIG Systems for Supplying Isolated DC Loads
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A vector oriented control technique with a two-loop control scheme has been developed for operating a stand-alone three-phase SEIG for supplying DC loads through a three-phase Pulse Width Modulated (PWM) rectifier. The proposed controller maintains constant load voltage with reduced harmonics at the PWM rectifier input terminals. In addition, it controls the real and reactive power flow between the SEIG and converter system. The proposed control scheme has been implemented employing dSPACE 1103 real-time controller. The successful working of the proposed control strategy has been verified for different operating conditions, by modelling the system in MATLAB/Simulink toolbox and the results are presented. A prototype system consisting of an SEIG, PWM rectifier and associated control circuits, has been built in the laboratory environment and a close agreement between the simulated and experimental results has been confirmed.
KeywordsSelf excited induction generator (SEIG) Pulse width modulation (PWM) rectifier Unity power factor (UPF)
The authors gratefully acknowledge the authorities of the National Institute of Technology, Tiruchirappalli, India for all the facilities provided for carrying out the experimental work in the preparation of this paper. Further, this work was supported in part by the National Institute of Wind Energy (Formerly Centre for Wind Energy Technology), Chennai, India, an autonomous Research and Development Institution under the Ministry of New and Renewable Energy, Govt. of India.
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