【摘要】 讨论了超导储能系统用四模块组合变流器的有功功率、无功功率四象限控制的设计问题。为了适应大功率变流器的需要主电路结构采用四模块电流型变流器直接并联,在调试方式上采用载波相移SPWM控制,在较低的开关频率实现大功率变流器SPWM技术,以扩大容量和抑制网侧谐波;在计算功率时采用的瞬时功率理论实时的计算出变流器的有功和无功功率进行闭环控制。同时结合了863项目研制了23kVA的变流器实验样机,对超导储能系统用电流型变流器四象限功率控制方法进行了验证。实验结果表明超导储能系统用组合变流器能独立快速地控制有功功率和无功功率。更多还原

【Abstract】 An active power and reactive power control used in four-modular converter for superconducting magnetic energy storage system is presented. The converter consists of four modules.Each module is a current source converter. Phase-shifted SPWM technique is adopted to control a directly-paralleled multi modular current source converter for Super conducting Magnetic Energy Storage System (SMES) to reach high power and low harmonics. A 23kVA prototype multi-modular converter which is based on 863-program has been developed. The research has shown that it can control active power and reactive power independently and rapidly.更多还原