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.

引用

页码：3349 / 3363

页数：14

共 34 条

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