基于有源型M3C矩阵变换器的海上风电低频送出方案  

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

作　　者：唐英杰 张哲任[1] 徐政[1] TANG Yingjie;ZHANG Zheren;XU Zheng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2022年第8期113-122,共10页Automation of Electric Power Systems

摘　　要：提出一种基于有源型模块化多电平矩阵变换器(M3C矩阵变换器)的低频交流输电方案,可减轻一侧工频或低频交流系统故障对另一侧交流系统产生的影响。首先,对有源型M3C的拓扑结构进行介绍,并推导了有源型M3C的数学模型。然后,基于所建立的数学模型设计有源型M3C的控制系统,提出低频交流输电系统故障隔离策略和储能单元荷电状态均衡控制策略。最后,在PSCAD/EMTDC中搭建基于有源型M3C的海上风电低频送出系统电磁暂态仿真模型,对不同类型交流系统故障与储能单元荷电状态平衡过程等典型工况进行仿真测试,验证所提方案的有效性。A low-frequency AC(LFAC)transmission scheme based on the active modular multilevel matrix converter(M3 C)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 M3 C is introduced,and the mathematical model of the active M3 C is derived.Then,based on the derived mathematical model,a control system of the active M3 C 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 M3 C 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.

关 键 词：储能 海上风电 低频交流输电 模块化多电平矩阵变换器 故障隔离 荷电状态均衡控制 

分 类 号：TM46[电气工程—电器] TM614