Dam & Safety ›› 2020, Vol. 0 ›› Issue (3): 57-.

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A new type of de-excitation system for generator

SUN Zhijiu, GAN Jianli and WU Long   

  1. Zhejiang Zheneng Beihai Hydropower Co., Ltd.
  • Received:2019-05-21 Online:2020-06-08 Published:2020-06-08

一种发电机新型灭磁系统的方案及探讨

孙志久1,干建丽1,吴  龙2   

  1. 1. 浙江浙能北海水力发电有限公司,浙江 杭州,310000;2. 南京南瑞继保电气有限公司,江苏 南京,211102
  • 作者简介:孙志久(1963— ),男,浙江慈溪人,高级工程师,从事水电机组运行及维护检修管理工作。

Abstract: Based on the demand for safety and rapidity of de-excitation, this paper puts forward the technical scheme and the control principle of de-excitation process of a new de-excitation system, and analyzes the de-excitation process under no-load false forced excitation fault and short circuit fault at the end of the generator. It shows that the new technical scheme of de-excitation can reduce the arc voltage of the de-excitation breaker on the premise of ensuring the safety and rapidity.

Key words: generator, field breaker, no-load false forced excitation, pulse locking

摘要: 针对发电机组灭磁安全和快速性的需求分析,提出一种新灭磁系统的技术方案及灭磁过程控制原理,并分析发电机空载误强励故障及机端短路故障下发电机的灭磁过程,表明在保证安全和快速灭磁的前提下,新型灭磁技术方案可以降低灭磁开关弧压的要求,对大型发电机组的快速灭磁装置设计及研究具有一定指导意义。

关键词: 发电机, 磁场断路器, 空载误强励, 脉冲闭锁