摘要
文章针对电网电压的不平衡跌落情况,采用了三相全桥的主电路结构,研究了静止坐标系中基于无阻尼谐振调节器的三相DVR控制方案,不仅实现了DVR输出电压的无差跟踪,而且使系统获得强鲁棒性;为了实现对变流器的限流控制,采用了滤波电感电流反馈结合DVR输出电压反馈的双环控制结构,并运用DVR输出电压和直流电压的前馈补偿使系统获得了较好的动态响应。最后,通过样机实验验证了理论分析的正确性。
In view of unbalanced voltage sags, a new control strategy for DVR based on three-phase full-bridge topology is adopted in this paper. With the resonant control concept in the stationary frame, the control system not only achieves zero steady state error of DVR output voltage, but also gains strong robustness. Furthermore, DVR output voltage loop is structured around an inner filter inductor current loop considering overcurrent protection. Performance of the inductor current loop is enhanced with decoupling of both the DC bus and feed-forward of the DVR output voltage. The control strategy is verified bv an experimental DVR svstem.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第8期1163-1167,1203,共6页
Journal of Hefei University of Technology：Natural Science
基金
"十一五"国家科技支撑计划重大资助项目(2006BAA01A20)
关键词
动态电压恢复器
电压跌落
电能质量
谐振控制
不平衡
dynamic voltage restorer（DVR）
voltage sag
power quality
resonant control
unbalance
