多端直流输电系统主回路设计研究  

Research on Main Circuit Design of Multi-Terminal HVDC Transmission System

作　　者：辛清明 黄莹 赵晓斌 郭龙 卢毓欣 XIN Qingming;HUANG Ying;ZHAO Xiaobin;GUO Long;LU Yuxin(State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China)

机构地区：[1]直流输电技术国家重点实验室(南方电网科学研究院),广州510663

出　　处：《南方电网技术》2020年第2期84-90,共7页Southern Power System Technology

基　　金：国家“万人计划”科技创新领军人才项目(SEPRI-Z1901002)。

摘　　要：多端直流输电系统因其结构灵活、经济性高而备受关注。多端直流输电系统因运行方式灵活,主回路关键设备参数选择和主回路状态计算需要考虑更多因素。本文从分析多端直流的系统运行条件入手,分析了多端直流的系统运行方式和控制方式。接着剖析了多端直流关键设备参数的限制因素,提出了适用于多端直流主回路关键参数的计算方法。构建了直流网络的潮流计算方程,提出了约束条件的调节方法。最后通过设计实例验证了所提方法的有效性。该方法为多端直流输电系统的设计提供了技术手段和支撑。Multi-terminal HVDC system has attracted much attention due to its flexible structure and high economic efficiency.Because the operation mode of multi-terminal HVDC system is flexible,the selection of key equipment parameters and the calculation of the main circuit state need to consider more factors.Firstly,the operating conditions of the multi-terminal DC system,the operation mode and control mode of the multi-terminal DC system are analyzed.Then,the limiting factors of the key equipment parameters are analyzed,and the computation method for the key parameters of the multi-terminal HVDC are proposed.The power flow calculation equation of the DC network is constructed,and the adjustment method of constraint conditions is proposed.Finally,the validity of the proposed method is verified by design examples.The method proposed in this paper provides technological means and support for the design of multi-terminal HVDC systems.

关 键 词：多端直流输电系统 主回路 关键设备参数 直流潮流 

分 类 号：TM717[电气工程—电力系统及自动化] TM621