Multilevel Cascaded-Type Dynamic Voltage Restorer With Fault Current-Limiting Function

作者：Jiang, Fei^*; Tu, Chunming; Shuai, Zhikang; Cheng, Miaomiao; Lan, Zheng; Xiao, Fan

来源：IEEE Transactions on Power Delivery, 2016, 31(3): 1261-1269.

DOI：10.1109/TPWRD.2015.2474703

• Dynamic voltage restorer (DVR)
• multilevel inverters
• fault current limiter
• voltage restoration

This paper presents a new multilevel cascaded-type dynamic voltage restorer (MCDVR) with a fault current-limiting function. This topology can operate in two operational modes: 1) a compensation mode for voltage fluctuations and unbalances and 2) short-circuit current-limiting mode. The current-limiting function of the MCDVR is performed by activating antiparallel thyristors during the short-circuit fault, and deactivating them during normal operation. The mathematical model of the MCDVR system is also established in this paper. The control scheme design and optimal parameter selection are outlined based on the detailed theoretical analysis of the converter. The transient states of the MCDVR in the compensation mode and current-limiting mode are also analyzed. Simulation results based on the PSCAD/EMTDC software, and experimental results on a laboratory setup help to validate the proposed topology and the theoretical analysis.

• 出版日期2016-6
• 单位湖南大学; 中国人民解放军信息工程大学