功果桥电厂发电机定子接地保护原理及校验方法

On the Principle and Verification Method of Generator Stator Grounding Protection in Gongguoqiao Power Plant

功果桥电厂水轮发电机的额定功率是225 MW,属于大型水轮发电机组。文章介绍了功果桥电厂发电机定子接地保护配置,详细介绍了定子接地保护的动作原理和动作逻辑,对功果桥电站发电机定子接地保护的校验方法进行了总结提炼,有利于专业人员更好地理解发电机定子接地保护,且对发电机定子接地保护功能校验有一定的借鉴意义。

Since the rated power of the hydro-generator in Gongguoqiao Power Plant is 225 MW,it is a large hydrogenerator set.Therefore,this paper introduces the generator stator grounding protection configuration of Gongguoqiao Power Plant.There are two sets of generator stator grounding protection configurations in Gongguoqiao Power Plant,one of which is 100%stator grounding protection composed of fundamental wave+third harmonic,and the other set.It is the generator stator injection type stator grounding protection,and introduces the action principle and action logic of the stator grounding protection in detail.At the same time,it summarizes and refines the verification method of the generator stator grounding protection in Gongguoqiao Power Station,which is beneficial to professionals.It has a certain reference significance for the verification of the generator stator grounding protection function.