Turbine speed control
Turbine speed control
(OP)
Hi, May I understand why Electronic Speed control is provided for Steam Turbines in addition to Hydraulic Governor? Are they not (Hydraulic or Mechanical governors) meant for throttling steam inlet as per set speed? If the function of Electronic Governor is to covert RPM to frequency and throttle the COntrol Valve, then we should be ok only with Electronic Governor?
Please let me know...
Please let me know...





RE: Turbine speed control
One other possibility occurred to me. The turbine could be built with a hydraulic governor, but have provisions for a future electronic governor. This might just mean that the rotor already has a toothed wheel and is machined for the speed probes needed for a possible future upgrade to an electronic governor.
Johnny Pellin
RE: Turbine speed control
1. All have hydraulic governors with Woodward Electronic Governors. I did not see an "Emergency Governor", But there is a purely mechanical Overspeed trip is provided. I am calling " purely mechanical", since ( my assumption) the shank there goes off and steam inlet to the Turbine is stopped in case there is an overspeed situation.
2. I did check your point, if they provided just an electronic over speed trip, but no, the manual clearly says they have provided Mechanical over speed trip.
3. I also went to the field to verify, the turbine has a Mechanical Governor unit attached, with a WOodward console.
Again , I am just thinking , could electronic governor is provided to control it through DCS? ( I know this is not a good question, even pure mechanical/hydraulic governor could be controlled with DCS)
Thanks a lot Johnny.
RE: Turbine speed control
Johnny Pellin
RE: Turbine speed control