基于子模块桥臂能量平衡的线间直流潮流控制器  

Interline DC Power Flow Controller Based on Submodule-bridge Energy Balancing

作　　者：教煐宗 全月 李彬彬[1] 索之闻 张书鑫[3] 徐殿国[1] JIAO Yingzong;QUAN Yue;LI Binbin;SUO Zhiwen;ZHANG Shuxin;XU Dianguo(School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市150001 [2]国网经济技术研究院有限公司,北京市102209 [3]东北电力大学电气工程学院,吉林省吉林市132012

出　　处：《电力系统自动化》2023年第14期114-123,共10页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52177173);中央高校基本科研业务费专项资金资助项目(HIT.OCEF.2022009)。

摘　　要：随着直流电网技术发展,直流电网的潮流控制需求逐渐突出。在总结线间直流潮流调控原理的基础上,文中提出一种基于子模块桥臂能量平衡原理的线间直流潮流控制器,所提拓扑无须引入环流通路和交流滤波电路,可减少投资成本,避免交流环流的效率问题。首先,讨论并分析了线间直流潮流控制器的拓扑原理。然后,介绍了基于子模块桥臂能量平衡的拓扑结构和工作原理,并研究了参数设计方法;设计了电流、电压运行波形,并给出了所提拓扑的控制方法;同时,将所提拓扑与环流能量平衡型及电容耦合型拓扑进行了器件电流应力、数量和导通损耗的对比。最后,通过四端环形直流电网仿真验证了所提线间直流潮流控制器的功能。With the development of the DC power grid technology,the demand for power flow control of the DC power grid is becoming more and more prominent.Based on the summary of the principle of interline DC power flow regulation and control,this paper proposes an interline DC power flow controller based on the energy balancing principle of submodule-bridge.The proposed topology does not require the adoption of current loop paths and AC filtering circuits,which can reduce the investment and avoid the problem of the efficiency of the AC loop current.First,the topology principle of the proposed interline DC power flow controller is discussed and analyzed.Then,the topology based on submodule-bridge energy balancing and its operating principle are described,and the parameter design method is studied.The current and voltage operation waveforms are also designed and the control method for the proposed topology is given.The proposed topology is compared with the current loop energy balancing topology and the capacitive coupling topology in terms of current stress,quantity and conduction loss of devices.Finally,the effectiveness of the proposed interline DC power flow controller is verified by the simulation of a four-terminal ring DC power grid.

关 键 词：直流电网 潮流控制 线间直流潮流控制器 能量平衡 子模块桥臂 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM571