Superconducting Magnetic Energy Storage Based DC Unified Power Quality Conditioner with Advanced Dual Control for DC-DFIG  

作　　者：Ruohuan Yang Jianxun Jin Qian Zhou Shuai Mu Ahmed Abu-Siada 

机构地区：[1]IEEE [2]School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China [3]Department of Electrical and Computer Engineering,Curtin University,Perth,WA 6102,Australia

出　　处：《Journal of Modern Power Systems and Clean Energy》2022年第5期1385-1400,共16页现代电力系统与清洁能源学报（英文）

摘　　要：The development of DC custom power protection devices is still in infancy that confines the sensitive loads integrated into medium-voltage(MV) and low-voltage(LV) DC networks. Considering the DC doubly-fed induction generator(DCDFIG) based wind energy conversion system(WECS), this paper proposes a dual active bridge(DAB) based DC unified power quality conditioner(DC-UPQC) with the integration of superconducting magnetic energy storage(SMES) to maintain the terminal voltage of DC-DFIG and regulate the current flow. The principle of the proposed DC-UPQC has three parts, i.e., parallel-side DAB(PDAB), series-side DAB(SDAB), and SMES,used for the voltage compensation, current and power regulation, and energy storage, respectively. The circuit principle of the PDAB and SDAB and the modeling of SMES are analyzed in this paper. A DC dual control strategy is also proposed to deal with the DC voltage oscillation generated by the AC-side asymmetrical fault. A case study of DC-DFIG interfaced with DC power grid is carried out, integrated with the proposed SMES-based DC-UPQC to verify the high-power applications of the proposed structure. Finally, an experiment is implemented, and the results demonstrate the correctness of the theoretical analysis and the feasibility of the proposed structure.

关 键 词：DC network unified power quality conditioner(UPAC) DC doubly-fed induction generator(DC-DFIG) power quality 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM711