摘要
指出了在配电网静止同步补偿器(DSTATCOM)中应用直接电流控制方式能够有效地防止装置过流,从而提高其安全可靠性,降低开关器件所需的容量裕度,提高性能价格比。并针对DSTATCOM广泛应用的三电平三单相桥结构,提出了一整套三电平变流器电流跟踪与直流电压平衡控制方法。仿真和实验结果表明采用该控制方法后,DSTATCOM响应迅速,工作稳定可靠,对负荷冲击具有很好的补偿效果。
The direct current control method for the DSTATCOM can greatly reduce the over-current risk of the converter, enhance the reliability and safety of the whole equipment, decrease the requested current rate of switch device and increase the performance/price ratio. Hence this paper proposes a three-level ramp comparison control method and the realization of neutral- point voltage control for the DSTATCOM based on transformer-isolated multilevel H-bridges converter. In the paper, the simulation and experiment results demonstrate that the DSTATCOM adopting ramp comparison control method can respond fast to the voltage fluctuation and flickers.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第4期61-65,共5页
Automation of Electric Power Systems
