一种电压正弦波波动发生器及控制策略

A Novel Voltage Sinusoidal Modulation Fluctuation Generator and Control Strategy

在此提出一种新型电压波动发生器的主电路拓扑,采用无源和有源相结合的方式实现。电压波动发生器的主要功率由电源直接提供,有源部分仅提供波动功率,大大降低了装置的有源损耗,易于实现大容量输出。有源部分前级采用全桥二极管整流提供稳定直流母线电压;后级逆变器采用电压电流双闭环瞬时值控制,保证电压波形跟踪性能以及良好的动态性能。逆变器输出包含两个频率分量的电压波形,通过变压器将逆变器输出电压波形叠加到正弦电压波形上得到典型的正弦波调制电压波动波形。建立了基于Matlab/Simulink软件平台的仿真模型,最后通过仿真和实验验证了主电路拓扑及控制策略的可行性和有效性。

A novel voltage sinusoidal modulation fluctuation generator main circuit topology is proposed,combined with passive and active to realize voltage fluctuation.The fundamental power of voltage fluctuation generator is supplied by system source and the fluctuation power is supplied by active components,so the capacitor generator is easy to realize larger because of lower active loss.Full bridge diode rectifier is adopted to maintain stable DC bus voltage,the later inverter is controlled by voltage and current double closed-loop instantaneous value to make sure good dynamic and static performance.The inverter output two frequency voltage waveforms,and added to sinusoidal voltage waveform by transformer so that the typical sinusoidal modulation voltage fluctuation waveform is obtained.The simulation model is set up on the platform of Matlab/Simulink.Finally,the simulation and experimental results show that the proposed control strategy is feasible and efficient.