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针对电压暂降影响电能质量的问题,利用动态电压恢复器(DVR)在系统发生电压暂降时从储能装置汲取电能,通过逆变单元供给重要负荷。提出适当调节蓄电池与超级电容器的容量配比并设计两储能元件间的控制并联器,并将此混合储能系统应用于DVR装置中,有效地提高整套DVR的工作特性与经济性能比。采用DSP(TMS320LF2812)为中央处理器构建的检测系统,实时快速、精确地采集电网电压。通过将混合储能系统运用于DVR的仿真分析与实验样机研制结果证明,对于持续时间较长或次数频繁的电压暂降,混合储能系统能有效地提高DVR的整体工作性能,稳定重要负荷电压。
Aiming at the problem of voltage sag affecting power quality, dynamic voltage restorer (DVR) draws power from the energy storage device when the system voltage sag occurs, and supplies the important load through the inverter unit. It is proposed that the capacity ratio between battery and supercapacitor should be properly adjusted and the parallel couplers should be designed. The hybrid energy storage system should be used in DVR device to effectively improve the operating characteristics and economic performance ratio of DVR. Using DSP (TMS320LF2812) for the central processing unit built detection system, real-time fast and accurate acquisition of grid voltage. The results of the simulation analysis and experimental prototype of the hybrid energy storage system applied to the DVR prove that the hybrid energy storage system can effectively improve the overall performance of the DVR and stabilize the critical load voltage for long duration or frequent voltage sag .