1前言今年是我厂三、四级电站实现“无人值班，少人值守”的关键年。机组大修又是保证实现“无人值班，少人值守”目标的硬件基础。可以说：机组大修质量的好坏直接关系目标的实现，同样也关系我厂的安全生产。三级3号机是今年安排的三台机组大修中的一台。此次机组大修除常规 1 Preface This year is the key year to realize “No one on duty and few people on duty” in the third and fourth power plants of our factory. Unit overhaul is to ensure that “unattended, fewer people on duty,” the goal of hardware. It can be said: the quality of unit overhaul directly related to the realization of the target, also related to the safety of our plant. Three three aircraft is arranged this year, three units overhaul one. The unit overhaul in addition to conventional