K
Hi all,
Basically I am interested in the over speed protection setting calculations for steam turbines, though the same may be relevant in some ways to gas turbines also. OK, here goes:-
A steam turbine trip [stop valve closing], not leading to a generator trip [Generator circuit breaker opening], since the generator megawatt transducer is showing a value higher than the low forward power trip setting --> indicating heavy passing of the stop valves. Now, I want to know what calculations we do so as to arrive at this low forward power setting? gas turbines have reverse power sensing, generator also has slight motoring capability making it much safer without risk of over speeding. What is the minimum steam flow that can cause over speeding? What are some rough values when it is expressed as the percentage of steam flow for 1] FSNL? 2] base load?
Basically I am interested in the over speed protection setting calculations for steam turbines, though the same may be relevant in some ways to gas turbines also. OK, here goes:-
A steam turbine trip [stop valve closing], not leading to a generator trip [Generator circuit breaker opening], since the generator megawatt transducer is showing a value higher than the low forward power trip setting --> indicating heavy passing of the stop valves. Now, I want to know what calculations we do so as to arrive at this low forward power setting? gas turbines have reverse power sensing, generator also has slight motoring capability making it much safer without risk of over speeding. What is the minimum steam flow that can cause over speeding? What are some rough values when it is expressed as the percentage of steam flow for 1] FSNL? 2] base load?