功率复用型高频隔离FDS及其在低压配电台区的应用  

High-frequency isolated power multiplexing FDS and its application in low-voltage distribution station area

作　　者：李笑霏 肖劲涛 王鹏[1] 纪斌[1] 刘学忠 赵崇滨 姜齐荣[2] LI Xiaofei;XIAO Jintao;WANG Peng;JI Bin;LIU Xuezhong;ZHAO Chongbin;JIANG Qirong(State Grid Beijing Electric Power Company,Beijing 100031,China;State Key Laboratory of Power System Operation and Control(Department of Electrical Engineering,Tsinghua University),Beijing 100084,China)

机构地区：[1]国网北京市电力公司,北京100031 [2]新型电力系统运行与控制全国重点实验室(清华大学电机工程与应用电子技术系),北京100084

出　　处：《电工电能新技术》2023年第5期81-87,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家电网有限公司科技项目(SGBJSY00DKJS2100738)。

摘　　要：目前,柔性多状态开关(FDS)多采用背靠背拓扑,需要工频变压器隔离零序回路,整体占地面积较大且效率偏低。为提升FDS在低压配电台区普及的可行性,本文提出了一种基于高频变压器隔离的功率复用型FDS。首先,介绍了变流器功率复用的基本原理,分析了时分复用方法相比频分复用方法更适合构建高频隔离FDS的原因;其次,阐明了高频隔离FDS的详细拓扑结构,设计了装置各变流器的控制策略,并使用PSCAD仿真初步验证原理;最后,设计算例验证了新型FDS在减少配电台区线损和均衡负载等方面的优势。所提装置与方法为在低压台区配电网中应用FDS提供了新选择。At present,the flexible distribution switch(FDS)mostly adopts the back-to-back topology,which requires the power frequency transformer to isolate zero-sequence voltage.The overall floor area is large and the efficiency is low.In order to improve the feasibility of FDS popularization in the low-voltage distribution station area,a multi-frequency multiplexing FDS based on high-frequency transformer isolation is proposed in this paper.Firstly,the basic principle of converter power multiplexing is introduced,and the reason why time-division multiplexing is more suitable for constructing high frequency isolated FDS than frequency division multiplexing is analysed;Secondly,the detailed structure of high frequency isolation FDS is expounded,and the control strategy of each converter is designed and verified by simulation using PSCAD;Finally,an example is designed to verify the advantages of the novel-type FDS in reducing the line loss and balancing the load in the distribution station area.The proposed device and method provide a new choice for applying FDSs in the distribution station area.

关 键 词：配电台区 柔性多状态开关 高频变压器 功率复用 

分 类 号：TM721[电气工程—电力系统及自动化]