Turbine Control System Based on Prediction of Rotor Thermal Stress

A turbine automatic control system, designated HITASS (Hitachi Turbine Automatic Startup System), has been developed, which is capable of predicting thermal stress in the turbine rotors. HITASS uses an auto- regressive dynamics model to predict the boiler outlet steam conditions which are used as th...

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Bibliographic Details
Published in:IEEE transactions on power apparatus and systems 1982-08, Vol.PAS-101 (8), p.2504-2512
Main Authors: Matsumoto, H., Sato, Y., Kato, F., Eki, Y., Hisano, K., Fukushima, K.
Format: Article
Language:English
Subjects:
Acceleration
Automatic control
Boilers
Control systems
Load management
Predictive models
Stress control
Thermal loading
Thermal stresses
Turbines
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Summary:A turbine automatic control system, designated HITASS (Hitachi Turbine Automatic Startup System), has been developed, which is capable of predicting thermal stress in the turbine rotors. HITASS uses an auto- regressive dynamics model to predict the boiler outlet steam conditions which are used as the basis for calculating thermal stress. It then carries out on-line optimization of acceleration rate and load variation rate in accordance with the predicted thermal stress. By using simulation techniques, it has been proved that HITASS makes possible a 25% reduction in startup time and a 30% improvement in load following performance as compared with the conventional off-line schedule control system. HITASS uses a HIDIC-08 microcomputer. The system has already been applied to a number of power plants with good operational results.
ISSN:0018-9510
2995-6323
DOI:10.1109/TPAS.1982.317654