摘要
灭磁装置作为现代大型发电机励磁系统的重要组成部分,担负着保护发电机组内部故障不被扩大的重要使命。传统的强开关遮断转移的灭磁方式,完全不能保证系统极限参数条件下的灭磁安全,为迁就其遮断能力的不足,往往以牺牲性能来延长灭磁时间,从而使事故灭磁的功能和性能大打折扣,不能起到有效保护发电机内部故障的作用。针对现代电机励磁系统的特点,结合事故实例分析,提出灭磁速率的界定划分,以及实现理想灭磁的新型柔性灭磁技术,展示了未来大型电机灭磁技术的发展方向。
The traditional forced switch breaking-transferring de-excitation system can not guarantee the de-excitation security under extreme conditions.For compensating its breaking capacity,the de-excitation time will be extended,and so that the incident de-excitation function and performance can not play an effective role in internal fault protection of generators.Based on the characteristics of modern excitation system and de-excitation accidents,the de-excitation rate limit and new flexible de-excitation technique were provided.The results show that this new technique will be the future of large-scale generator de-excitation development.
出处
《水力发电》
北大核心
2010年第3期81-83,共3页
Water Power
关键词
灭磁安全性
灭磁速度
理想灭磁条件
柔性灭磁技术
de-excitation security
de-excitation rate
ideal excitation conditions
flexible de-excitation technique
