Title :
Unstable frequency oscillations in a slow-response reheat-turbine generator
Author_Institution :
Electr. Energy Syst. Lab., Nat. Tech. Univ. of Athens, Greece
fDate :
31 Jan-4 Feb 1999
Abstract :
This paper shows that governor rate limits may result in slow response that interacts with that of a reheat turbine to create unstable frequency oscillations. The origin of these oscillations is explained with a linear analogue, while nonlinear simulation shows that the oscillations evolve into a limit cycle due to gate limits. A control scheme to stabilize the frequency oscillations through control of the intercept valve is developed and tested in the paper
Keywords :
frequency stability; oscillations; steam power stations; steam turbines; valves; boilers; frequency oscillations stabilisation; gate limits; governor rate limits; governors; intercept valve; limit cycle; linear analogue; long term dynamics; nonlinear simulation; reheat turbine; slow response; slow-response reheat-turbine generator; steam power plant; steam turbines; unstable frequency oscillations; Boilers; Frequency control; Power generation; Power system dynamics; Power system modeling; Power system stability; Power system transients; Stability analysis; Turbines; Voltage;
Conference_Titel :
Power Engineering Society 1999 Winter Meeting, IEEE
Conference_Location :
New York, NY
Print_ISBN :
0-7803-4893-1
DOI :
10.1109/PESW.1999.747439
