华龙一号应急柴油发电机组机械调速器漂移故障分析及解决方案

Analyses and solutions about governor’s zero drift in emergency diesel set of Hualong demonstration project

调速器作为柴油发电机组转速控制的核心部件,对核电厂应急柴油发电机组的安全运行以及全厂失电后恢复应急供电都起着至关重要的作用。结合电子调速器和机械调速器的特点,对华龙一号某核电厂应急柴油发电机组出现的机械调速器零点漂移问题,从调速系统配置、切换逻辑、定值设置、漂移事件过程及后果进行全方面的分析。按照不影响应急柴油发电机组并网以及电子调速器执行安全功能实现的原则,从优化机调定值设置、改善设备运行环境以及增加Droop模式等角度提供解决方案。

As the main control unit of diesel generator,the is the crucial part of Emergency Diesel Set(EDG)in security and recovering power supply for Nuclear Power Station.Combining the characteristics of electronic governor and mechanical governor,this issue analyses the zero drift problem of mechanical governor in Hualong nuclear power project.Also it’s the first time for all-around analysis on the governor including its configuration、switching logic、set-point、process and consequence of drift event.On the basis of no influence on that the EDG can being combined to the grid as well as insuring the electronic governor should execute the safety functions,this issue proposes the solutions for drift event which include optimizing set-point、improving the operation environment and adding Droop mode.