The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Bookmark and Share
Misoperation Analysis and Countermeasures for Unit-transverse Differential Protections of Generators
Author(s): 
Pages: 45-48
Year: Issue:  4
Journal: Dam Observation and Geotechnical Tests

Keyword:  单元件横差保护 失磁 三次谐波 匝间短路 故障录波;
Abstract: 单元件横差保护是一种简单灵敏的反应匝间短路等发电机定子绕组内部故障的主保护。分析了发电机单元件横差保护的基本原理,阐述了二滩水电厂大型水轮发电机单元件横差保护的具体配置。描述了一起由于发电机失磁引起的单元件横差保护误动事件,结合保护动作时和后期试验时的故障录波数据,对保护的动作行为进行了详细分析。根据分析结果给出了合理的改进措施:在不改变保护配置的情况下对整定值进行修改;结合发电机保护装置改造对保护原理进行改进。现场试验和机组运行实践证明了改进措施的可行性和有效性。
Related Articles
No related articles found