A Hierarchical LCC-MMC Hybrid Transmission System for Transmitting Large-scale Renewable Power Over Long-distance

被引：0
|
作者：
Meng P. [1 ]
Xiang W. [1 ]
Chi Y. [2 ]
Wang Z. [2 ]
Jing J. [3 ]
Wen J. [1 ]
机构：
[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan
[2] State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, China Electric Power Research Institute, Haidian District, Beijing
[3] State Grid Jiangsu Power Company, Nanjing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 10期
关键词：
Adaptive droop control; Cascaded converter; Hierarchical access; Hybrid HVDC transmission system; Renewable energy transmission;
D O I：
10.13334/j.0258-8013.pcsee.200788
中图分类号：
学科分类号：
摘要：
To achieve the collection and long-distance transmission of large-scale onshore renewable energy sources such as wind power, this paper proposed a hybrid cascaded DC transmission system suitable for the hierarchical access of multiple wind power bases with different scales. Firstly, the topology and operating characteristics of the hierarchical access-hybrid cascade transmission system were introduced. The system was designed with a double-layer structure, which could realize the access of wind farms of different scales. The high-voltage valve adopted the line commutated converter, and modular multilevel converters were connected in parallel as the low-voltage valves. Then, the mathematical model of the system was built, and the coordinated control strategy was designed accordingly. To respond to the wind farm output fluctuations, the adaptive P-V droop control was designed to ensure the stable operation of the system. Finally, a simulation model of the hierarchical access-hybrid cascade transmission system was built in PSCAD/EMTDC to verify the effectiveness of control strategies. The research results show that the system could be an alternative for long-distance transmission of large-scale wind power. © 2021 Chin. Soc. for Elec. Eng.
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页码：3349 / 3363
页数：14
相关论文
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