ZHU Xiao-xing1, LIU Wu-lin1, CHEN Bin21.Hunan Provincial Electric Power Testing & Research Institute. EVALUATION OF SAFETY AND RELIABILITY FOR EMERGENCY TRIP SYSTEM OF 300 MW UNITS IN THERMAL POWER PLANTS[J]. Thermal power generation, 2009, 38(7): 7-9.
ZHU Xiao-xing1, LIU Wu-lin1, CHEN Bin21.Hunan Provincial Electric Power Testing & Research Institute. EVALUATION OF SAFETY AND RELIABILITY FOR EMERGENCY TRIP SYSTEM OF 300 MW UNITS IN THERMAL POWER PLANTS[J]. Thermal power generation, 2009, 38(7): 7-9.DOI:
The emergency trip system(ETS)of steam turbine is one of the important protection for thermal power units.Based on related regulations and requirements of safety evaluation
an investigation of EPS for main 300 MW thermal power units in Hunan Province has been carried out
it has discovered that the problems existing in ETS of many units are in different degrees as follows:unreasonable allocation of power source
imperfect opto-acoustic alarms
unsuitable wire-connection and signal-collecting source for push botton of shutdown etc..For these
some improvement measures
such as ensuring the power source to have two-loop reliable incoming wires
adding function of power source monitoring
perfecting opto-acoustic alarm devices
and the TSI over-speed shutdown has at least to lead two pairs of signal wires to ETS etc.