【摘要】 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。更多还原

【Abstract】 At present, many governing system of 200MW steam turbine made in China is replaced with DEH.But the mechanical overspeed protective sysitem is adopted yet in most steam turbine. So the limitation of the former is not be improved. In this paper, aimed at the limitation of put forwarded mechanical over-speed protective system, electronic overspeed protective system is instead to the mechanical overspeed protection. The rebuilding project and selecting equipment are analyzed,and the favorable effect is taken.更多还原