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以超临界直流锅炉为研究对象,分析了给水量和燃料量与锅炉中间点温度的关系,建立了中间点温度非线性离散模型,并进行控制系统设计,最后将该控制方法应用于某600 MW超临界直流机组,通过实际数据仿真结果和分析,证明了该控制系统在适应变工况运行的同时,能够实现中间点温度稳定的控制目的,能实时响应负荷变化,保证电力系统安全经济运行。
Taking the supercritical once-through boiler as the research object, the relationship between water supply and fuel quantity and boiler midpoint temperature was analyzed. A nonlinear discrete model of midpoint temperature was established and the control system was designed. Finally, the control method was applied to a 600 MW The results of the simulation and analysis of the actual data show that the control system can adapt to the working conditions and achieve the purpose of temperature control at the midpoint. It can respond to load changes in real time and ensure the safe and economic operation of the power system.