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.
出处
《电机与控制应用》
北大核心
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)
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
inductive flltering
novel converter transformer
direct current transmission
commutation reactance
short-circuit reactance
