An Accurate Power-sharing Control Method based on Circulating-current Power Model for Voltage-source-inverter Parallel System

作者：Gao Mingzhi^*; Zhang Canhui; Qiu Maohang; Li Weiheng; Chen Min; Qian Zhaoming

来源：30th Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2015-03-15 to 2015-03-19.

• Voltage-source Inverter
• Parallel system
• Droop control
• Circulating-current

This paper analyzes the voltage-source-inverter parallel system as a multi-input & multi-output system, and proposes the circulating-current mathematical model, the steady-state model and small-signal model of parallel system. Then the phasor models of the circulating-current and the circulating-current power are proposed. Subsequently, the mathematical model of traditional droop control is built and analyzed based on the circulating-current power model. According to the analysis of droop control, this paper proposes an accurate parallel control strategy (omega-P-cir and V-Q(cir) control), which can eliminate the circulating-current power and the bias of output voltage frequency and amplitude. Finally, simulation and experiment result are presented, which validates the performance of the proposed method.

• 出版日期2015
• 单位浙江大学