特高压三端直流输电线路的动态物理模拟  

Establishment of Dynamic Physical Model of Three-terminal UHV DC Transmission Line

作　　者：张凤鸽 文明浩 刘铁 王幸主 杨德先 吴彤 ZHANG Fengge;WEN Minghao;LIU Tie;WANG Xingzhu;YANG Dexian;WU Tong(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;State Grid Hubei Maintenance Company,Wuhan 430050,China)

机构地区：[1]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,武汉430074 [2]国网湖北检修公司,武汉430050

出　　处：《高电压技术》2020年第6期2064-2071,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(2017YFB0903604)。

摘　　要：世界上首个特高压三端混合直流输电工程"昆柳龙直流工程"将在2021年建成投运,该工程是将云南大容量水电能源采用先进的直流输电技术送到广西和广东。为了研究特高压远距离架空直流输电线路各种故障特征,探索发现更好的直流保护新判据,分析了直流输电线路的零序电阻和电感频率特性,提出了换流站接地极简化模型,设计了昆柳线、柳龙线两条直流线路模型,建成了一套含接地极的完整分布参数动态物理模型。试验表明,该模型系统达到设计要求,能正确反映原型系统物理特性,可以开展不同故障点的各种类型短路实验,为直流输电技术研究提供了宝贵的试验数据。"Kunbei-Liubei-Longmen HVDC Project",the world’s first UHV three-terminal hybrid HVDC project,will be completed and put into operation in two years.This project is to transmit the large capacity hydropower in Yunnan to Guangxi and Guangdong by adopting advanced DC transmission technology.To study all kinds of fault features of UHV remote overhead DC transmission lines as well as explore a new criterion for better DC protection,the zero-sequence resistance and inductance frequency characteristics of DC transmission lines were analyzed,and the simplified model of grounding electrode line of converter station was proposed.The DC line models of Kunbei-Liubei Line and Liubei-Longmen Line were also designed,and a complete set of dynamic physical model of distributed parameters with grounding pole was established.Tests showed that the model system met the design requirements,which was able to reflect the physical characteristics of prototype system accurately as well as carry out various types of short circuit experiments at different fault points,providing valuable experimental data for the research of DC transmission technology.

关 键 词：特高压 柔性直流 直流线路 接地极 动态模拟 

分 类 号：TM721.1[电气工程—电力系统及自动化]