Low-frequency Transmission Scheme for Offshore Wind Power Based on Active Modular Multilevel Matrix Converter

被引：0
作者：
Tang Y. [1 ]
Zhang Z. [1 ]
Xu Z. [1 ]
机构：
[1] College of Electrical Engineering, Zhejiang University, Hangzhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2022年 / 46卷 / 08期
关键词：
Balance control of state of charge (SOC); Energy storage; Fault isolation; Low frequency AC (LFAC) transmission; Modular multilevel matrix converter (M3C); Offshore wind power;
D O I：
10.7500/AEPS20210712007
中图分类号：
学科分类号：
摘要：
A low-frequency AC (LFAC) transmission scheme based on the active modular multilevel matrix converter (M3C) is proposed, which can reduce the influence of faults occurring at one side of the low frequency or power frequency AC system on the other side. First, the topology of the active M3C is introduced, and the mathematical model of the active M3C is derived. Then, based on the derived mathematical model, a control system of the active M3C is designed, and the fault isolation strategy of the LFAC transmission system as well as the state of charge (SOC) balance control strategy of the energy storage unit is proposed. Finally, an electromagnetic-transient simulation model of the low-frequency transmission system based on the active M3C for offshore wind power is built in PSCAD/EMTDC. Simulation tests are carried out for typical working conditions such as different kinds of AC system faults and the SOC balance process of the energy storage unit, and the effectiveness of the proposed scheme is verified. © 2022 Automation of Electric Power Systems Press.
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页码：113 / 122
页数：9
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