英语翻译国内大型热力设备的自动控制系统已逐步采用分散控制系统,这使先进的控制策略可较方便地得到应用.但目前大型热力设备的

英语翻译
国内大型热力设备的自动控制系统已逐步采用分散控制系统,这使先进的控制策略可较方便地得到应用.但目前大型热力设备的自动控制几乎都采用经典的PID控制系统,难于取得优良的控制品质.如许多大型发电厂的关键控制系统,大多未能取得理想的控制品质,严重影响了机组的安全与经济运行.模糊系统是一种能正确反映客观世界的强非线性系统.该种控制器中母管压力模糊状态变量控制系统不仅可以有效克服锅炉母管压力大惯性,大滞后的特性,快速消除各种自发性扰动,而且能有效抑制当汽机调门开度发生变化时所造成母管蒸压力的变化,确保了母管制机组的安全的经济的运行.因此,该方法可以很好地解决火电厂热工过程控制中的非线性热力系统的全局优化问题,该类非线性控制系统具有优良的全局控制性能.

Domestic large thermal equipment automatic control system has been gradually adopted distributed control system, the advanced control strategies can be more easily applied.But almost all the large-scale automatic control of heating equipment using the classic PID control system, is difficult to achieve good control quality.As many key control system of large power plants, mostly failed to obtain the ideal control quality, seriously affected the safety and economic operation of the unit.Fuzzy system is a kind of strongly nonlinear system can correctly reflect the objective world.Mother tube pressure in this kind of controller fuzzy state variable control system not only can effectively overcome the mother tube boiler pressure of big inertia, big lag characteristics, quickly remove all kinds of spontaneous disturbance, and can effectively restrain when turbine of the opening of the tone changes caused by the mother tube steam pressure change, to ensure that the mother tube safe and economic operation of the unit.Therefore, this method is a good way to solve the nonlinear thermal system of power plant thermal process control of the global optimization problem, the class of nonlinear control system has excellent overall control performance.