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Boiler , turbine - c**trol modes
Boiler Master (basic firing rate demand) computati** is dependent ** the Current operating mode like This demand is transmitted in parallel to the fuel and air c**trol sub -loops. During the unit startup, Boiler Master is determined as a fixed demand with the rate to obtain the optimum Boiler steam temperature rising and steam flow until HP turbine bypass c**trol valve is fully closed. This demand will be adjusted manually or automatically according to the unit startup mode. During this period, Main steam pressure is c**trolled by HP turbine bypass c**trol valve. During the unit start up, the operating mode will be Manual Mode both Turbine governor and Boiler Master manual. After HP turbine bypass c**trol valve is fully closed, the operating mode will be normally transferred to Coordinated C**trol Mode. In case of Coordinated C**trol Mode, the turbine governor c**trols MW and Boiler Master c**trols the main steam pressure. In case of Boiler Follow Mode, Boiler Master also c**trols the main steam pressure. In case of Boiler Master Manual or load runback, the operating mode becomes Turbine Follow Mode and turbine governor c**trols the main steam pressure.
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#2
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مشكور على الكتاب
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العلامات المرجعية |
الكلمات الدلالية (Tags) |
boiler, control, modes, turbine |
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المواضيع المتشابهه | ||||
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