Proportional Power Sharing Control for Parallel-Connected Inverters

摘要：

Parallel-connected inverters are important parts of a microgrid.Each inverter operates with a load in proportion to its capacity is necessary.This paper proposes a control strategy for paralleled three-phase inverters of different capacities based on droop control method.The system impedance of an inverter is kept inductive by setting a virtual reactance,and proportional power sharing is achieved through proper design of the different virtual reactance values.The control strategy can also eliminate circulating reactive power in the inverters in steady state and suppress over-current of inverters in dynamic process,which are the drawbacks of the conventional control strategy.The experiments on two inverters in parallel prove the validity of the proposed approach.

关键词： Parallel-connected inverters:droop control method virtual reactance:proportional power sharing

作者: Zhongliang Li Xudong Sun Jianyun Chai

作者单位: Dept.of Electrical Engineering Tsinghua University Beijing,China

会议类型: 国际会议

会议名称: 2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies(第四届电力设施管制、重建及能源技术国际会议 DRPT 2011)

会议地点: 威海

会议语种:英文

页码: 1647-1651

在线出版日期: 2011-07-06（万方平台首次上网日期，不代表论文的发表时间）