无线并联逆变器下垂参数对环流的控制

摘要

无互联线电源是大功率发展的一个有效途径，并联逆变电源可提高功率、利用率等问题。通常我们利用传统的下垂控制法解决环流问题，但传统下垂控制策略有着稳态均流精度低和动态性能差的缺陷，在频率、幅值静态误差和功率均分两者之间不能有很好的效果。本文通过研究下垂参数对并联逆变器的影响，提出了随着功率变化改变下垂系数的方法来控制均流精度，通过MATLAB软件仿真验证控制策略的合理性，搭建4kVA逆变平台验证并联系统的可行性。%Wireless parallel inverter power is a useful method towards the development of high power, where parallel inverters achieve improvements like its power and utilization. Traditional droop control methods have the defects of poor steady-state current sharing accuracy and poor dynamic performance, and cannot achieve good results on frequency-amplitude static error and power sharing. By studying the impact of droop parameters on the parallel inverter, we propose a method to control current sharing accuracy, which changes the droop coefficient with power. Reasonability of the control strategy is verified by MATLAB software simulation, and feasibility of the parallel inverter is verified by building a 4kVA inverter platform.