火电厂PID调节器调节过程及其参数整定方法.doc

摘 要 锅炉汽包水位是锅炉运行中的一个重要的监控参数，它间接反映了锅炉蒸汽负荷与给水流量之间的平衡关系汽包锅炉给水自动控制的任务是使锅炉的给水量适应锅炉的蒸发量以维持汽包水位在规定的范围内。关键词模糊控制；给水；PIDAbstract The steam drum water level of boil is important monitoring parameter in a boiler movement, it had reflected indirectly the balance relations between the boiler steam load and the discharge of water. In the steam drum boiler for the water automatic control duty to adapt the boiler transpiration rate for the water volume, maintains the steam drum water level in the stipulation scope. As a result of for the water system complexity, the existing thermoelectric power station entire journey for the water control adopt the traditional PID control, its precise mathematical model establishes with difficulty, when the system has the big lag, denatured and so on a series of characteristics, often with difficulty satisfies the thermal power unit complex operating mode request, therefore many large-scale thermoelectric power stations proposed the optimization plan to the existing entire journey for the water control. First this article has analyzed the time domain of control system, then introduces the PID regulator’s adjustment process and the parameter installation method. And has analyzed great emphasis on the boil for the water control system, the steam drum water control object show the inertia, the non-self regulation ability, uses of a fuzzy control to control it, and separately carries on the simulation using MATLAB to the tradition PID control and the fuzzy PID cascade control, With comparing using the fuzzy PID cascade control method obtain result that is delay slightly, over small, enables the steam drum the dynamic characteristic to obtain the optimization. Keywords: Fuzzy control; For the water control; PID control 目 录 引言……………………………………………………………………………………… 1 第一章 控制系统的时域性能分析………………………………………………………2 1.1 一阶系统的时域响应分析……………………………………………………… 2 1.2 二阶系统的时域响应分析……………………………………………………… 3 1.3 高阶系统的时域响应分析……………………………………………………… 6 第二章控制及其调节过程…………………………………………………………9