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《Transactions of China Electrotechnical Society》 2008-01
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An Improved Wireless Control Strategy for Parallel Operation of Distributed Generation Inverters

Yao Wei Chen Min Chen Jingjing Zhu Pengjun Qian Zhaoming (Zhejiang University Hangzhou 310027 China)  
In this paper, a novel control scheme is presented, which is able to improve the transient response and power sharing accuracy of parallel-connected inverters with no control interconnections, and the active and reactive circulating current of the parallel system model are analyzed. A multiple-loop controller is developed based on the traditional droop method. The output voltage and load current compensation loops are added in the scheme to improve the performance and robust of single inverter. The instantaneous reference adjustment loop and variable impedance adjustment loop are added to enhance dynamic performance of parallel inverters, as well as reduce the circulating current at the parallel inverter’s startup and running. The proposed controller provides both steady-state objectives and a good transient performance. Simulation and experimental results are reported, confirming the validity of the proposed control technique.
【Fund】: 国家自然科学基金资助项目(50237030)
【CateGory Index】: TM464
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