DC Voltage Target Predetermined Control of Hybrid MMC to Handle Line Fault of Overhead DC Grid

被引：0
|
作者：
Zhou M. [1 ]
Xiang W. [1 ]
Zuo W. [1 ]
Wen J. [1 ]
Lin W. [2 ]
机构：
[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei Province
[2] TBEA China Xinjiang Sunoasis Co., Ltd, Urumqi, 830011, Xinjiang Uygur Autonomous Region
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 17期
关键词：
Active current-limiting control; DC fault; DC grid; DC voltage predetermined control; Modular multilevel converter (MMC);
D O I：
10.13334/j.0258-8013.pcsee.181491
中图分类号：
学科分类号：
摘要：
With the plan for HVDC projects based on hybrid/full-bridge modular multilevel converter (MMC), the research on DC fault ride through control of hybrid MMC is an urgent demand for engineering application. To reduce the peak value of DC fault current, and accelerate the recovery of the DC power, this paper proposed a DC voltage predetermined control for hybrid MMC. It optimized the transient characteristics of the DC voltage station after the DC fault. The fundamental principle and design method of DC voltage predetermined control were disclosed in this paper. The selection principle of DC voltage reference during the DC fault was discussed in the view of the application both in two-terminal HVDC system and DC grids. The influence of different DC voltage predetermined curves on the drop of DC bus voltage, the peak of DC current, and the recovery of DC power transmission were analyzed. Simulation analysis shows that the DC voltage predetermined control can reduce the peak value of DC fault current to a certain extent, and significantly accelerate the DC power recovery after DC fault, which has certain engineering application prospects. © 2019 Chin. Soc. for Elec. Eng.
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页码：5015 / 5024
页数：9
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