Small-Signal Modelling of LCC-MMC Series Hybrid HVDC Transmission System

被引：0
|
作者：
He Y. [1 ]
Xiang W. [2 ]
Zhou J. [3 ]
Zhao J. [4 ]
Wen J. [1 ]
机构：
[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan
[2] Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow
[3] State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co. Ltd, Beijing
[4] Electric Power Research Institute of State Grid Jiangsu Electric Power Co. Ltd, Nanjing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 07期
关键词：
Hybrid high voltage direct current; Line commutated converter(LCC); Modular multilevel converter(MMC); Series connect; Small-signal modelling;
D O I：
10.19595/j.cnki.1000-6753.tces.L90543
中图分类号：
学科分类号：
摘要：
This paper establishes the small-signal model of LCC-MMC series hybrid HVDC transmission system, which rectifier side is LCC and which inverter side is series connect of LCC and MMC. Firstly, equivalent circuits of the AC and DC sides of LCC and equivalent circuits of the AC and DC sides of MMC considering internal dynamic characteristics are derived. Then, models of the rectifier and inverter sides of the system are constructed based on equivalent circuits. By combining each part of the above, consisting of the DC line and control system, the entire system's model is obtained. Finally, the small-signal model of the entire system is obtained by linearizing the entire system's model. The accuracy of the small-signal model is verified by comparing the electromagnetic transient model based on PSCAD/EMTDC. The influences of the constant DC voltage control parameters of MMC and LCC in the inverter-side, PLL parameters, and the tie line parameters on the small-signal stability of the system are analyzed based on the small-signal model. The small-signal model of LCC-MMC series hybrid DC transmission system proposed in this paper can be used for the system's small-signal stability analysis, thereby providing a valuable reference for system design and parameter selection. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
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页码：1492 / 1506
页数：14
相关论文
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