大功率组合式逆变器限流技术研究

Research on Current Limiting Scheme for High Power Combined Inverter

组合式三相逆变器特有的电路拓扑及其大功率的特点,给传统限流策略的应用带来了困难。对传统限流策略进行了分析,指出将其应用于大功率组合式逆变器时存在的问题,提出了可用于大功率组合式逆变器的改进型限流策略。在一台400kVA大功率组合式逆变器上进行了实验,其结果表明了改进型限流策略的有效性与可靠性。

The particular topology and the characteristic of high-power of three-phase combined inverter made it difficult to apply the conventional current limiting scheme to the system.Tbe conventional current limiting scheme has been analyzed, the new problems existed when applying the scheme to the high power combined inverter system are pointed out and analyzed,and an improved current limiting scheme which can be applied to high power combined inverter is presented.At last,tbe improved current limiting scheme is applied to a high power combined inverter with a capability of 400 kVA,the experiment result shows the validity and the reliability of the improved current limiting scheme.