Semimonthly
ISSN 1000-1026
CN 32-1180/TP
Semimonthly
ISSN 1000-1026
CN 32-1180/TP
XUE Yu
College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaREN Yongfeng
College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaHU Zhishuai
College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaHE Jinwei
School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, ChinaFANG Chenzhi
College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaZHU Rong
College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China1.College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;2.School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
In order to improve the operation characteristics of the direct drive-doubly fed hybrid wind power system under non-ideal grid voltage in a distributed wind power application scenario, a scheme is proposed to realize the flexible fault voltage ride-through in the hybrid distributed wind power system by applying the unified power quality conditioner (UPQC) with a nine-switch converter. Focusing on the control of the nine-switch converter, based on the analysis of the DC-side voltage sharing relationship of the nine-switch converter, the third harmonic injection modulation method for the nine-switch converter is studied to improve the DC voltage utilization rate. Considering the difference in the DC voltage demand of the nine-switch converter, a strategy of dynamically assigning modulation ratio limiting based on the degree of voltage failure is designed. Through the simulation analysis of the above schemes under voltage sag, rise, and harmonics and asymmetrical conditions, the feasibility of the nine-switch converter to optimize the operation characteristics of direct drive-doubly fed hybrid distributed wind power is verified.
This work is supported by National Natural Science Foundation of China (No. 51967016) and Inner Mongolia Autonomous Region Science and Technology Major Special Project (No. 2019ZD027).
| [1] | XUE Yu, REN Yongfeng, HU Zhishuai, et al. Control Strategy of Direct Drive-Doubly Fed Distributed Wind Power System Based on Nine-switch Converter[J]. Automation of Electric Power Systems,2022,46(7):152-159. DOI:10.7500/AEPS20210826002 |
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