太阳能功率变换器并联控制方法研究

Study of the Control Method for Solar Converter Modules in Parallel

传统的太阳能电池通常根据功率选定相应的变换器,因此功率不易扩展。为此设计了一种太阳能功率变换器模块并联方案,在实际应用过程中,可通过增减并联在母线上的模块数来扩展整个供电系统的输出功率。设计实现了太阳能功率变换器模块并联方案以及相应的硬件电路,对三路模块的并联实验结果表明,各模块间能协调工作,并随负载的变化能自动调节模块间的工作状态,使母线电压稳定。

Power converters are generally selected for traditional solar cells according to the power demand,the system power is not easy to expand.A controlling strategy of common solar cell converter modules in parallel is designed,the output power of the whole generating system can be expanded by changing the number of modules on bus.The control strategy and the corresponding hardware circuit of solar power converter modules in parallel are realized.The experimental results of three modules in parallel show that modules can work well and adjust job status automatically between them according to the load changing,make the bus voltage stabile.