锅炉燃烧系统分布式预估控制的研究与应用  

RESEARCH AND APPLICATION OF DISTRIBUTED PREDICTIVE CONTROL IN BOILER COMBUSTION PROCESS

作　　者：陈铁军[1] 杨阳[1] 彭皎龙[1] 

机构地区：[1]郑州大学电气工程学院,河南郑州450001

出　　处：《热力发电》2012年第12期90-93,共4页Thermal Power Generation

基　　金：河南省杰出人才创新基金资助项目(521000100)

摘　　要：针对锅炉燃烧系统存在的关联、不确定和时间滞后等特性,分析了影响锅炉运行安全、经济性等主要因素的关联性,从而建立了由蒸汽压力、烟气含氧量及炉膛压力3个关联子系统组成的分布式模型。对模型进行预估控制,其预估和控制仅依赖局部设计,当局部发生故障时,不会过多地降低全局控制控制性能,在排除故障后系统将自动恢复至全局控制功能。仿真结果表明,该预估控制具有良好的精确度,并且在受到干扰后能够很快恢复至稳态,具有较强的鲁棒性。实际应用表明,预估控制显著改善了锅炉燃烧工况,可节煤近4%。Against such characteristics as relevance,uncertainty and time delay in combustion system,the association of factors influencing the safety and economy of boiler operation was analyzed.Therefore,a distributed model consisting of three related subsystems such as steam pressure,oxygen content in flue gas and furnace pressure was established.Predictive control was conducted on this model,in which the prediction and control only depend on partial design,because when a fault occurred on the local function,the global control performance would not be reduced a lot,it would be recovered itself after trouble clearing.The simulation results showed that,this predictive control method had good precision,and can return to steady state soon after being disturbed.So it has strong robustness.The practical application showed that,the predictive control method improved the combustion greatly and can save nearly 4% of the coal.

关 键 词：锅炉 燃烧 分布式模型 预估控制 蒸汽压力 烟气含氧量 炉膛压力 

分 类 号：TK229.6+3[动力工程及工程热物理—动力机械及工程] TP274[自动化与计算机技术—检测技术与自动化装置]