大规模高压直流输电系统闭锁故障下送端风电场高电压穿越的控制策略  

A Coordinated HVRT Strategy of Large-Scale Wind Power Transmitted With HVDC System

作　　者：韩平平[1] 张海天 丁明[1] 张炎[1] 陈凌琦 李宾宾 HAN Pingping1, ZHANG Haitian1, DING Ming1, ZHANG Yan1, CHEN Lingqi1, LI Binbin2(1. Anhui Provincial Laboratory of New Energy Utilization and Energy Conservation （Hefei University of Technology）, Hefei 230009, Anhui Province, China; 2. State Grid Electric Power Research Institute of Anhui Electric Power Co., Ltd., Hefei 230022, Anhui Province, China)

机构地区：[1]安徽省新能源利用与节能重点实验室(合肥工业大学),安徽省合肥市230009 [2]国网安徽省电力有限公司电力科学研究院,安徽省合肥市230022

出　　处：《电网技术》2018年第4期1086-1092,共7页Power System Technology

基　　金：新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司)开放基金的资助

摘　　要：大规模风电经高压直流输电系统（high voltage direct current,HVDC）外送时,如果发生送端整流站直流闭锁故障,将导致送端电网电压骤升,致使风电场面临严重的高电压穿越（high voltage ride through,HVRT）的问题。为确保故障期间风电场能够安全并且不脱网运行,首先从双馈异步风力发电机组（doubly fed induction generator,DFIG）的网侧变流器（grid side converter,GSC）约束条件出发,探讨在不同电压骤升程度下网侧变流器的功率适配原则及其可控区,根据不同设备（模块）的响应时间协调发电机控制模块、投入静止无功补偿器（static var compensator,SVC）与切除送端母线交流滤波器的先后顺序,继而提出一种有效的HVRT协调控制方案。仿真结果表明,所提方案既能保证直流闭锁故障情况下双馈风电机组不脱网运行,又能对送端电网进行无功支持从而加速送端网络故障的恢复。When large-scale wind power is transmitted with HVDC system, the sending voltage will swell under HVDC blocking contingencies and the wind farms will be confronted with severe high voltage ride through（HVRT） problem. To ensure the wind farm operating in security, power assignation principle and controllability for grid-side converter（GSC） of doubly fed induction generator（DFIG） considering its constraints was discussed. Then the sequence of events such as coordinating control modules, putting into static var compensators（SVC） and cutting off the sending AC filters was coordinated on the basis of different response times. An effective HVRT coordinated control strategy was put forward. Simulated results indicated that the scheme could ensure the generators not running off grid during faults and accelerate fault network recovery by providing reactive power support to it.

关 键 词：高压直流输电 双馈感应发电机 直流闭锁 高电压穿越 协调控制策略 

分 类 号：TM721[电气工程—电力系统及自动化]