感应滤波对新型换流变压器短路电抗的影响  

Impacts of Inductive Filtering on Short-Circuit Reactance of Novel Converter Transformer

作　　者：尚荣艳[1] 彭长青[1] 方瑞明[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《电机与控制应用》2012年第11期5-9,共5页Electric machines & control application

基　　金：福建省自然科学基金(2012J01223);华侨大学科研基金资助项目(09BS615)

摘　　要：针对感应滤波技术是否影响新型换流变压器短路电抗的问题,简要介绍了直流输电系统的接线方案及感应滤波技术的基本原理,并论述了换流变压器短路电抗在直流输电系统短路故障中的作用,推导出判断换流变压器短路电抗变化的方法。在此基础上,通过理论计算和仿真计算,研究滤波前后换流变压器短路电抗的变化情况。结果表明,感应滤波技术对新型换流变压器短路电抗的影响非常小,可以忽略不计。感应滤波既能改善换相特性,又不会恶化短路特性,克服了传统直流输电系统两者不可兼顾的缺点,说明新型换流变压器应用于直流输电系统具有独特优势。To answer whether the induction filtering technology impacted on the short-circuit reactance, firstly introduced the connection scheme of the DC transmission system and the basic principles of the induction filtering technology. Then, it outlined the role of short-circuit reactance of the converter transformer in DC transmission when short-circuit fault happened and deduced the method that could judge whether the short-circuit reactance of the converter transformer changed. On the basis, through theoretical and simulation calculation, it researched the change of the short-circuit reactance of the converter transformer before and after filtering. Results showed that the inductive filtering has little impacts on the short-circuit reactance of the novel converter transformer, which can be neglected. It not only can improve the commutation characteristic but also will not deteriorate the short-circuit characteristic, which overcomes the shortcomings in the traditional DC transmission system and indicates that the novel converter transformer has unique advantages to apply to the DC transmission system.

关 键 词：感应滤波 新型换流变压器 直流输电 换相电抗 短路电抗 

分 类 号：TM401.1[电气工程—电器]