MW级并网变流器主功率电路的设计

Design of main power circuit of MW-level grid converter

介绍了PWM并网变流器的工作原理,对MW级并网变流器的主功率回路的关键器件的选型计算进行了详细的分析。在此基础上,研制了一台1 MW/690 V的并网变流器样机,进行了相应的实验研究。实验结果表明分析计算是正确的,并网变流器能实现能量的双向传递,具有优良的并网特性。

The working principle of PWM grid-converter was introduced. The key components of main power circuit in MW-level grid converter were studied in detail. On the basis of this, a prototype of 1 MW/690 V grid-converter was developed and corresponding experimental was done. Experimental results show that the research and analysis are correctly and effectively. With appropriate control, the power could flow from the supply to generator or the reverse flow, the converter had an excellent network characteristics.