基于交流侧并联功率解耦电路的控制器设计

Controller Design Based on AC Side Parallel Power Decoupling Circuit

针对光伏并网发电系统中交流侧解耦电路控制存在的问题,在系统控制中同时使用DSP数字控制和74系列芯片模拟控制,在能实现较低硬件成本的基础上又能更好的实现对微逆变器和解耦电路的控制。总结了DSP,FPGA与DSP+FPGA控制器的优缺点,借鉴双CPU的设计思路,在此基础上进行相关创新改进,以74L芯片为核心设计了功率耦合电路的模拟控制电路,根据设计建立了实验平台,根据实验结果可以证明设计与理论的科学性和可用性,为微逆变器的耦合电路控制提供了新的思路。

Aiming at the problems of AC side decoupling circuit control in photovoltaic grid-connected power generation system,DSP digital control and 74 series chip analog control were used in the system control at the same time in this study.On the basis of lower hardware cost,the control of micro inverter decoupling circuit can be better realized.It summarized the advantages and disadvantages of the DSP,FPGA and DSP+FPGA controller.The power coupling circuit simulation control circuit was designed by taking 74 L chip as the core and referring to the double CPU design on the basis of the relevant innovation improvement and the experimental platform was established.The results show that the design is feasible,providing a new perspective for the coupling circuit of micro inverter control.