针对现代化水电厂少人值班的现状,而在机组大修期间尾水管又需定时手动启动排水的现实情况,利用已有的渗漏排水泵PLC模块的备用节点,实现检修排水泵定时启动排水。经实践证明可以满足检修工作对尾水管水位的要求。此方法可供其他水电厂在机组大修期间采用,具有一定的推广价值。 In view of the status quo of the shortage of people on duty in the modern hydropower plant, the drains of the draft tube need to be periodically started manually during the overhaul of the unit, and the standby drain of the existing drainage drain pump PLC module is used to achieve regular start-up drainage of the maintenance drain pump. Proved to meet the maintenance work on the draft tube water level requirements. This method can be used by other hydropower plants during overhaul of units, and has certain promotion value.