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Reconsideration on the Necessity of Quantitative Design of Main Protection for Large and Medium Hydro-Generator
Author(s): 
Pages: 7-10
Year: Issue:  4
Journal: ELECTRICAL EQUIPMENT

Keyword:  大中型水轮发电机绕组设计故障特点内部短路计算主保护设计;
Abstract: 大中型水轮发电机主保护的定量化设计方法已在三峡、龙滩、拉西瓦、小湾等水电厂得到了应用.随着研究设计工作的深入和工程实践经验的总结,又提出了主保护的定量化及优化设计方法.文中分析了水轮发电机绕组形式对故障特点的影响,归纳总结了典型故障特征,但这种归纳只是为简化设计计算的工作量指明了方向.由于大中型水轮发电机绕组形式的多样性,因此现阶段还难以仅凭发电机的故障特点就决定中性点侧引出方式和主保护的配置方案,而应在全面内部短路分析计算的基础上,再经定量化的设计过程来完成.
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