Optimal Operation Frequency for Medium Frequency Grid-following Offshore Wind Farm Integrated by MMC-HVDC

被引：0
|
作者：
Zhang Z. [1 ]
Chen Q. [2 ]
Jin Y. [1 ]
Yin G. [2 ]
Wang S. [2 ]
Xu Z. [1 ]
机构：
[1] Department of Electrical Engineering, Zhejiang University, Zhejiang Province, Hangzhou
[2] Huadong Engineering Corporation Limited, POWERCHINA, Zhejiang Province, Hangzhou
来源：
Dianwang Jishu/Power System Technology | 2022年 / 46卷 / 08期
关键词：
grid-following wind turbine; medium frequency collect network; MMC-HVDC integration; offshore wind farm; optimal operation frequency selection;
D O I：
10.13335/j.1000-3673.pst.2022.1257
中图分类号：
学科分类号：
摘要：
Grid-following wind turbine (WT) and modular multilevel converter (MMC) based HVDC is a typical offshore wind farm integration scheme, but the cost of an offshore rectifier platform is rather high at present. The medium frequency grid-following offshore wind farm integrated by the MMC-HVDC scheme may reduce the volume, the weight and the cost of the rectifier, which is a competitive scheme to improve the economy of the practical projects. In this paper, the optimal frequency selection of the medium frequency grid-following offshore wind farm integrated by the MMC-HVDC scheme is discussed. Firstly, the parameters and ampacity in per unit length of the submarine cable are calculated in different operation frequencies. Based on the typical connection schemes of the submarine cable, the models of the submarine cable at different frequencies are selected. Then the power losses of the collector system and the valve losses of the offshore rectifier platform at different operating frequencies are calculated. Finally, the converted present costs of the power losses of the collector system and the valve losses of the offshore converter platform, and the investment costs of the collector system and the offshore converter platform are calculated respectively. Based on the comprehensive economic comparison results, it is found that the optimal frequency is in the range of 150~200 Hz. © 2022 Power System Technology Press. All rights reserved.
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页码：2881 / 2888
页数：7
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