Abstract:

Abstract:In order to improve the automatic control level,some feedwater control strategy optimization measures were adopted for the 1050MW ultra supercritical power unit of Huadian Laizhou Power Generation Company Limited,such as changing the feedwater control strategy to coal dominated strategy,controlling the coal water ratio by adjusting the fuel and water supply,adding superheat control circuit, and adding boiler combustion simulation circuit for feedwater flow setpoint,etc.After the feedwater control strategy optimization,the result of steady load test shows that the operating indicators ofimportant parameters related to the power unit are qualified,which improves the quality of coordination control and contributes to the energy saving and cost reducing.

Key words: Keywords:ultra supercritical power unit, feedwater control system, coal water ratio, degree of superheat, water supply flow