基于风油比系数调节和内模控制的锅炉送风控制研究

Study on boiler air supply control based on air-oil ratio coefficient regulation and internal model control

燃油锅炉定风油比系数送风控制由于负荷和环境参数变化,鲁棒性及抗干扰性不高,难以实现燃烧最高效率点的跟踪。文章引入风油比系数调节和内模控制,根据实时油量调节风油比系数,同时采用内模控制减小送风调节机构的滞后,在DCS平台设计送风控制器的基础上,基于Simulink完成锅炉仿真模型,搭建HIL (Hardware in the Loop)系统,验证风油比系数调节和内模控制的控制性能,并与传统定风油比系数送风控制比较,结果表明风油比系数调节与内模控制在负荷和环境变化下均可有效跟踪最高燃烧效率点。

Due to the change of load and environmental parameters,the robustness and anti-jamming of the air supply control of fixed air-fuel ratio coefficient of oil-fired boiler are not high,so it is difficult to track the highest combustion efficiency point. This paper introduces wind-oil ratio coefficient regulation and internal model control,adjusts wind-oil ratio coefficient according to real time oil quantity,and adopts internal model control to reduce the lag of air supply regulation mechanism. Based on DCS platform,air supply controller is designed. Based on Simulink,the boiler simulation model is completed,and the HIL system is built to verify the control performance of wind-oil ratio coefficient regulation and internal model control,and compare with the traditional fixed wind-oil ratio. The results show that the wind-oil ratio coefficient adjustment and the internal-mode control can effectively track the highest point of combustion efficiency under the change of load and environment.