大规模特高压交直流混联电网特性分析与运行控制_李明节.pdf

40 卷 4 期 电 网 技 术 Vol. 40 No. 4 20 16 年4 月 Power System Technology Apr. 20 16 文章编号：1000-3673 （20 16）04-0985-07 中图分类号：TM 71 文献标志码：A 学科代码：470 40 大规模特高压交直流混联电网特性分析与运行控制 李明节 （国家电网公司，北京市 西城区 100031 ） Characteristic Analysis and Operational Control of Large-Scale Hybrid UHV AC/DC Power Grids LI Mingji e (State Grid Corporation of China, Xicheng District, Beijing 100031, China) ABSTRACT: Power grids in China are at high-speed 关键词：特高压交流；特高压直流；强直弱交；换相失败； development period of Ultra High Voltage (UHV). 电力电子化；次同步振荡 Characteristics of power grids keep changing, and new DOI 10.13335/j.1000-3673.pst.2016.04.001 requirements are put forward on power grid operation. Based on in-depth analysis of operation characteristics of UHV power 0 引言 grids, basic characteristics of power grids are concluded as 我国一次能源与负荷呈逆向分布，为满足清洁 “strong DC and weak AC”. Main features of power grid 能源送出、负荷中心电力供应、节能减排等方面的 operation performance are summarized as follows: coupling 迫切需求，国家电网大力发展适于远距离、大容量 between AC and DC, sending and receiving ends becomes more [1-7] and more closer; influence of faults on power grids extends from 输电的特高压交、直流技术 。当前，国家电网公 local to global; grid frequency and voltage stability problems 司系统已实现全部电网通过交、直流互联。2016 年 become increasingly prominent for mass generation of renewable 底，特高压运行规模将达到 “六交五直”，是世界 power and DC transmission; power grid stable category has been 上唯一同时运行特高压交、直流的电网，特高压交 expanded; power electronic characteristics is prominent. 直流混联、电力大规模跨区输送已成为国家