Research on Intelligent Auxiliary Operation System of 660 MW Ultra-supercritical Coal-fired Unit
In order to enhance the intelligent monitoring of the condition of 660 MW ultra-supercriti-cal coal-fired unit,the intelligent auxiliary operation system of 660 MW ultra-supercritical coal-fired u-nit is designed.In the hardware part of the system,DCS technology is introduced as the control module,and it focuses on the design of flow accumulator,remote I/O and coupler to analyze the data of the opera-tion condition of 660 MW ultra-supercritical coal-fired unit and realize the secure data transmission of the monitoring panel interface.In the software part of the system,the particle swarm algorithm is used to process the operation data and predict the operation status of the coal-fired unit,and the combination of PID control and Smith prediction method is used to realize the intelligent control of the ultra-supercritical coal-fired unit.The experimental results show that the method can measure the system load distribution between 300 MW and 500 MW,and can measure the steam pressure,fuel quantity and feedwater flow un-der 400 MW load and 600 MW load,and the control effect of flue gas oxygen content is more accurate and stable.
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