犍为和桥巩发电机主保护设计特点及异同分析

Design Characteristic and Similarities and Differences of Main Protection Configuration Scheme for Qianwei and Qiaogong Hydro-generators

犍为和桥巩水电站都采用贯流机组,发电机容量近乎相同,每相定子绕组均为两分支;犍为发电机配置一套完全裂相横差保护和一套完全纵差保护,桥巩发电机配置一套完全裂相横差保护和两套不完全纵差保护。本文将两个电站的发电机主保护设计方案作对比,分析两个电站发电机主保护设计方案的异同,说明两分支贯流机组发电机主保护方案的设计特点,以及发电机主保护定量化设计理念的变化,为相关工程应用提供参考。

Both Qianwei and Qiaogong hydropower stations adopt tubular units with the same generator capacity and two-branch stator windings for each phase.Qianwei generator is equipped with a set of completely split phase transverse difference protection and a set of complete longitudinal difference protection,and Qiaogong generator is equipped with a set of completely split phase transverse difference protection and two sets of incomplete longitudinal difference protection.By comparing the main protection design schemes of two power stations,this paper analyzes the similarities and differences of the main protection design schemes of the two power stations,explains the design characteristics of the main protection scheme of the two branch tubular units,as well as the changes of the quantitative design concept of the main protection of the generator,and provides references for the related engineering applications.