600MW火力发电厂引风机RB事故分析

大型机组在运行中,当主要辅机发生故障跳闸,造成锅炉出力无法满足机组负荷的要求、机组实发功率受到限制时,为了适应运行设备出力,机组协调控制系统自动将机组负荷迅速降到尚在运行的辅机所能承受的目标负荷值,并控制机组在允许参数范围内继续运行而不停炉,这一过程称为辅机故障快速减负荷(即RUNBACK,简称RB)。

Accident Analysis of RB for The 600MW Power Plant Induced Draft Fan

Large units in operation,the main auxiliary equipment fault tripping,the output force of the boiler can not meet the requirements of the unit,the unit load of actual power generated is limited,in order to adapt to the operation of the device output,unit coordinated control system will automatically unit load is reduced quickly to target loadis still in the running of the auxiliary equipment can bear the value,and the control unitcontinue to run in the allowed range of parameters without stopping furnace,aprocess called auxiliary fault runback（RUNBACK,referred to RB）.