新型与常规直流输电系统动态响应特性仿真分析  

Transient response characteristics of new and convention HVDC transmission system

作　　者：宁志毫[1] 

机构地区：[1]国网湖南省电力公司电力科学研究院,湖南长沙410007

出　　处：《湖南电力》2015年第5期16-19,共4页Hunan Electric Power

摘　　要：分析了一种基于新型换流变压器的直流输电系统,结构特点在于:换流变压器阀侧采用延边三角形结构,绕组连接处引出抽头接滤波兼无功补偿装置,有效地将谐波抑制于阀侧并部分地补偿换流器所消耗的无功功率。通过分别采用固定电容器(FC)和静止无功补偿器(SVC)2种不同的无功补偿方式,应用PSCAD/EMTDC仿真工具对比分析了新型与常规直流输电系统在典型故障下动态恢复方面的特性。A new HVDC transmission system based on the new converter transformer is analyzed. The tap at the linking point of the prolonged winding and the common winding of the secondary windings is connected with the LC resonance circuit. There will be no inductive harmonic current in the primary winding. Moreover,the active power that the converter needs can be partly compensated in the secondary winding. Finally,the PSCAD / EMTDC simulation tool is used to study the dynamic recovery performance of the new and convention HVDC system adopting several different var compensating devices in HVDC inverter-Fixed capacitor( FC),static var compensator( SVC) when HVDC are subject to various typical faults.

关 键 词：直流输电 无功补偿 动态特性 新型换流变压器 

分 类 号：TM721.1[电气工程—电力系统及自动化]