目前,国产200MW汽轮机调节系统改为数字电液调节系统时,大部分机组的超速保护仍然采用原来的机械超速危急遮断系统,使汽轮机保护系统原有的缺陷未得到彻底的改进。针对机械超速保护系统存在的不足,提出采用电子超速保护装置代替原超速保护装置,并对改造方案及有关设备的选择进行了分析,取得了良好的效果。 At present, when the domestic 200 MW turbine control system is replaced by a digital electro-hydraulic control system, the overspeed protection of most of the units still uses the original mechanical overspeed emergency cut-off system, so that the original defects of the turbine protection system are not completely improved. Aiming at the shortcomings of the mechanical speeding protection system, this paper proposes that the electronic speeding protection device be used instead of the original speeding speeding protection device, the selection of the reformation scheme and related equipment is analyzed, and the good effect is achieved.