基本非隔离输入串联输出串联组合直流变换器的控制策略

Control Strategy of Basic Non-isolated Input-series Output-series DC Converters

分析了基本非隔离输入串联输出串联组合直流变换器输入均压与输出均压之间的关系,研究了一种实现输入均压与输出均压的双环交错控制策略。在保证变换器实现输入均压和输出均压的同时,可以实现输入均压控制与输出电压控制调节相解耦,有利于分别独立设计各个控制器。交错控制技术的引入,使得输出电压纹波得到了减小。最后,通过仿真研究,验证了该控制策略的有效性。

The relationship was analyzed between the input voltage sharing and the output voltage sharing of the converter.A practical control strategy of interleaving control for the input voltage sharing and output voltage sha-ring was researched,the decoupling control of the input voltage and the output voltage was derived.Thus the close-loop controls of each input capacitor voltage and the output voltage could be designed independently.At the same time,the output voltage waveform was reduced for the interleaving control.The simulation was built to verify the theoretical analysis.