Study on the Valve Transfer Characters of Valve Management in Homemade 300 MW Units
Some advanced functions of valve management were adopted to realize two distribute steam mode between sequence valve and single valve conveniently, including valve transfer in no load undulation case, by use of governor driven by independent servo valve and servomotor in modern large turbine units governing system. Some experimental studies were carried out on the valve transfer characters in a homemade 300 MW unit. The result shows prominent discrepancy exists between two distribute steam mode,in expand difference cylinder metals temperature, HP-IP cylinder exit steam temperature and the characters of vibration.It point out that the efficiency and the safety of unit running characters must be considered together to adapt developing electric power market