A novel control method for the compensation voltages in dynamic voltage restorers

被引：0
|
作者：
Lee, SJ [1 ]
Kim, H [1 ]
Sul, SK [1 ]
机构：
[1] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul, South Korea
来源：
APEC 2004: NINETEENTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, VOLS 1-3 | 2004年
关键词：
dynamic voltage restorers (DVR); compensation voltage controller; PQR power theory;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper discusses the control of the compensation voltages in dynamic voltage restorers (DVR). On analyzing the power circuit of a DVR system, control limitations and control targets are presented for the compensation voltage control. Based on the preceeded power stage analysis, a novel controller for the compensation voltages in DVRs; is proposed by a feedforward control scheme. This paper also discusses the time delay problems in the control system of DVRs. Digital control systems inevitably have control delay due to its the sampling of signal, the switching frequency of an inverter, and the signal delay due to sensor itself. The total signal delay is considerable in real implementation and it endanger the system stablity. This paper analyzes the relationship among the control delay, closed loop damping factor, and the output filter parameters of DVR inverters. Based on the control system analysis, a guideline is proposed to design the appropriate output filter parameters and the inverter switching frequency for DVRs. The proposed theory is verified by an experimental DVR system which is controlled in full digital manner.
引用
收藏
页码：614 / 620
页数：7
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