Uprating of 275kV Lines to 400kV as Part of a Contingency Plan for Generation Integration
Uprating of 275kV Lines to 400kV as Part of a Contingency Plan for Generation Integration
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作为发电并网应急计划的一部分，将 275kV 线路升级至 400kV
DOI：
10.1109/tdcla.2006.311548
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
P. Naidoo
中科院分区：
文献类型：
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作者：
S. Narain;D. Muftic;B. Jacobs;P. Naidoo
Eskom Lethabo发电站的多台发电机变压器发生故障，导致仅有的备用变压器二次电压为400千伏。唯一可行的解决方案是在三个月的时间内将现有的275千伏并网升级到400千伏国家电网。275千伏的Lethabo-Glockner 1和2线路被指定用于增压。对这些生产线进行了审核，以验证生产线组件，并为调查解决方案提供背景。实际的配置变化主要是通过对相组件绝缘的创新修改来实现的，理论研究和可能的全面电气和机械测试证实了这一点。在撰写本报告时，升压线路在400千伏时已成功运行。这个项目对其他提升线项目有严重的影响。本文重点介绍了生产线设计者所遇到的技术挑战以及提出和实施的独特设计方案。
Multiple generator transformer failures at the Eskom Lethabo power station caused the situation whereby the only available spare transformers had a secondary voltage of 400 kV. The only practical solution was to upgrade the existing 275 kV integration to the national grid to 400 kV, within a time constraint of three months. The 275 kV Lethabo-Glockner 1 and 2 lines were earmarked for the uprating. These lines were audited to validate line components and provide the background to investigate solutions. Practical configuration changes were effected mainly through the innovative modification of the phase assembly insulation, substantiated by theoretical studies and full scale electrical and mechanical tests where possible. The uprated lines have been operating successfully at 400 kV at the time of writing. This project has serious ramifications for other uprating lines projects. This paper focuses on the technical challenges experienced and the unique design solutions proposed and implemented by the line designers