摘要
中频逆变器作为交流供电系统的组成部分,广泛地运用在航空、船舶和机车等领域,而逆变器的并联控制技术可实现冗余供电和大容量供电,是当今逆变电源发展的重要方向之一。首先针对中频逆变器的特点,采用了负载电流前馈的双闭环PR控制策略以改善其输出特性;随后针对两台逆变器组成的并联系统进行了建模分析,采用基于平均有功和无功功率控制的有线并联控制策略,并引入虚拟阻抗以提高并联系统的可靠性与均流特性。最后通过仿真和实验验证了单机与并联系统控制策略的可行性。
As part of the AC power supply system, medium frequency inverters are widely used in the fields of aviation, shipbuilding and vehicles. The control technology of paralleled inverters can make power supply redundant and high-capacity, which is one of inverter＇s development trends. According to the characteristics of middle frequency inverter, load current feed-forward control and proportional resonant （PR） controller were adopted to improve the output characteristics. Then, the mathematical model of the 2-paralleled inverter system was established, adopting the parallel control strategy based on the average active and reactive power control, and adding the virtual resistance to improve the current-sharing quality and stability of the paralleled inverters. At last, the validity of the control schemes was verified by the simulation and experiment results.
出处
《电源学报》
CSCD
2013年第3期5-12,共8页
Journal of Power Supply
基金
国家自然科学基金资助项目(51277162)
关键词
中频逆变器
比例谐振控制
负载电流前馈
逆变器并联
有功和无功功率
虚拟阻抗
middle frequency inverter
PR control
load current feed-forward
paralleled inverters
active and reactive power
virtual resistance
