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为给景洪等后续电站水轮发电机主保护的设计提供借鉴,对三峡右岸发电机主保护配置方案的设计研究进行了总结。通过细化三峡右岸发电机的故障特点来确定其典型故障特征,为主保护配置方案的优化设计明确了方向,同时也大大减少了计算的工作量。文中提出由“完全裂相横差保护+不完全纵差/完全纵差保护”构成“一横一纵”的初步格局,再经定量分析结果决定是否增设零序电流型横差保护,从而确定最终的主保护配置方案,这一设计思想将在偶数分支水轮发电机主保护的设计中继续得以验证和完善。
In order to provide references for the design of the main protection of Hydrogenerator such as Jinghong Power Plant, the design and research of the main protection configuration scheme for the Three Gorges right bank generator are summarized. By refining the fault characteristics of the generator on the right bank of the Three Gorges Reservoir, the typical fault characteristics are identified, which provides a clear direction for the optimal design of the main protection scheme and greatly reduces the computational workload. In this paper, a preliminary pattern of “one horizontal and one vertical” is formed by “complete split phase differential protection + incomplete partial difference / complete longitudinal differential protection”, and then the quantitative analysis results determine whether to add zero sequence current type differential protection to determine Finally, the main protection configuration scheme, this design idea will continue to be verified and improved in the design of the main protection of even-numbered branch hydro-generator.