逆变电源无线并联系统稳态频率无差的仿真实现

逆变电源无线并联系统常采用传统无线并联理论,即电压-频率下垂理论控制,采用此方案控制的并联系统,其稳态输出电压频率与指令值有偏差,且所带负载越重,稳态输出频率下降越多,当偏差超出允许范围时就会对所带负载造成影响,使其不能正常工作。该文采用改进有功功率控制环的滤波器和调节器算法,在不影响系统动态响应速度的条件下,仿真实现了系统输出频率稳态无差控制,对实际应用具有指导意义。

Simulation of no steady frequency-deviation in the parallel inverter without control interconnections

The traditional parallel theory without control interconnections has been adopted commonly in the parallel inverter system.There is a deviation between the steady output frequency and the instruction of this system controlled by the above scheme,and the heavier the load is,the droopier the frequency will be.When the error is out of the permitted range,the system can not be operated normally.By improving the filter and adjuster arithmetic of the active power control loop,it is realized by simulation that the output frequency can track the instruction without error on the condition of the same dynamic response.The result is valuable to practical engineering.