背靠背直流输电系统双端供电启动分析与控制  

The start-up process analysis and control of VSC-HVDC used in AC grid interconnection

作　　者：鲁静 申明[1] 

机构地区：[1]西安理工大学,陕西西安710048 [2]西安铁路职业技术学院,陕西西安710026

出　　处：《自动化与仪器仪表》2018年第1期102-106,共5页Automation & Instrumentation

基　　金：国家自然科学基金项目(51477139);陕西省重点学科资助项目(105-00X1201)

摘　　要：针对VSC-HVDC系统启动时产生冲击电流和冲击电压的问题，本文基于两电平换流器拓扑结构，提出了适用于VSC—HVDC双端供电系统的启动方法。分析了VSC—HVDC的启动过程和特性，采用直流侧串联限流电阻的方法抑制系统启动冲击电流和电压。提出了限流电阻的设计与选取方法，设计了双端供电直流输电系统平滑启动的复合控制策略。仿真结果验证了所提电阻选取方法的正确性与启动控制策略的有效性。Aiming at the problem of impact current and shock voltage at the start of VSC-HVDC system, this paper presents a start-up method of VSC-HVDC for the topological structure of the two-level converter. The starting process and characteristics of VSC-HVDC are analyzed, and the current and voltage of the system can be restrained by the de side series limiting resistance. In this paper, the design and selection method of current-limiting resistance is proposed, and the compound control strategy is designed. The simulation results verify the validity of the proposed method and the effectiveness of the startup control strategy.

关 键 词：启动控制 VSC-HVDC 限流电阻 冲击电流 

分 类 号：TM721.1[电气工程—电力系统及自动化]