滩坑水电站发电机主保护定量化及优化设计研究

Study on the Design and Optimization of the Main Protection of Power Generator in Tan Keng Hydropower Station

滩坑发电机中性点设备及保护改造已成功实施,有必要对其技改过程进行归纳总结——在全面的内部短路仿真计算的基础上,经定量化及优化设计过程,立足于发电机原有分支分组方式增设了裂相横差保护,既显著提高了主保护配置方案的匝间短路保护灵敏性,又计及了发电机中性点侧铜环布置和分支TA安装的难度,将为后续水电站的技改工作提供借鉴。

The technical renovation of neutral point device and main protect of Tankeng Hydro-generator has been successfully implemented.It is necessary to summarize the process of technical renovation–Based on the comprehensive internal fault simulation,the quantitative and optimization design process of main protection for Tankeng generator has been completed.The split-phase protection has been added based on the original branch grouping method.At the time of improving protection sensitivity for turnto-turn short-circuit,the main protection configuration scheme may not lead to the increase of difficulty to arrange the generator neutral-point copper collar and install branch TA.Above design experience will be verified in the subsequent technical renovation work of hydropower station.