南方电网技术2011，Vol.5Issue(1)：25-28,4.
真空有载分接开关在高压直流换流变压器中的运用
Application of Vacuum On-Load Tap-Changers in HVDC Converter Transformers
沈大中 1Axel Kraemer 1Dieter Dohnal1
作者信息
- 1. 德国MR公司,Falkensteinstr.8,93059 Regensburg,Germany
- 折叠
摘要
Abstract
On-load tap-changers (OLTCs) are indispensable components in modem converter transformers for HVDC transmission lines. They compensate the system voltage variation, optimize the control angle of converter valves and realize the operation with reduced DC voltage. But the non-sinusoidal current waveshape with the high rate of rise during tap-change operation augments the switching duties and leads to an over sizing of the OLTC, and the frequent tap-change operations result in high maintenance demand.The switching condition of OLTCs in converter transformers is compared to that of power transformers in this paper. The introduction of vacuum switching technology in OLTCs provides, besides the elimination of oil contamination, the unique advantage for heavy switching duties as that in converter transformers for HVDC applications. The rating of the OLTC can be adjusted optimally to the service duties. Since this new OLTC technique is maintenance-free up to 300,000 operations, the maintenance work can be reduced to a minimum. The reliability and the availability of converter transformers are therefore considerably improved. The sparing in volume and weight through the optimized rating of OLTCs makes a contribution to the future effort in ultra HVDC development.关键词
有载分接开关/真空开关管/真空断流器/高压直流/变压器/换流变压器Key words
on-load tap-changer/ vacuum switching/ vaccum interrupter/ HVDC/ transformer/ converter transformer分类
信息技术与安全科学引用本文复制引用
沈大中,Axel Kraemer,Dieter Dohnal..真空有载分接开关在高压直流换流变压器中的运用[J].南方电网技术,2011,5(1):25-28,4.
