【作者】 袁桂丽；

【导师】 徐大平；

【作者基本信息】 华北电力大学 ， 控制理论与控制工程， 2001， 硕士

【摘要】 本文为已有的第三类边界条件下汽轮机转子温度、热应力的解析算法作出了递推公式。并用C语言编制了程序，对朝阳电厂国产200MW汽轮机的一次实测冷态启动进行了仿真。 本文为国产200MW汽轮机热应力控制启动提出一套方案，为朝阳电厂200MW汽轮机的优化启停和运行提供了理论上的依据。 另外，本文针对锅炉及汽轮机热应力过程惯性大等特点，提出了对热应力实行预监控方法，使启动过程中热应力真正能够实现在等热应力带内波动。 本文对国产200MW汽轮机调节系统建立数学模型。同时，还对汽轮机调节系统的控制器作了改善。由于汽轮机调节的难点在于影响汽轮机输出参数（功率、转速）的扰动因素很多，且诸因素又具有严重的不确定性，因而基于精确数学模型的传统PID控制难以满足要求。且由于各扰动因素对汽轮机过程变化的惯性影响相差较大，结果使所设计的调节系统不能在所有工况下都有满意的调节效果。为解决此问题，本文采用自调整因子的模糊控制与传统PI控制相结合的方法。使该控制系统不但具有响应快、超调小，而且具有鲁棒性强等特点。更多还原

【Abstract】 In this paper, recurrence formula was proposed for the analytic method of the temperature and thermal stress calculation of steam turbine rotor under the condition of the third of boundary. The author drawn up software and make a simulation experiment in the startup of the units of Chao Yang plant. A set of scheme was drawn up for thermal control system of the homemade 200MW steam turbine, so the paper provided theoretical grounds for the optimization of the startup process and operation mode of the 200MW units of Chao Yang plant. In the paper, a method of forecasting and controlling control for thermal stress was provided for the large delay of boiler and steam turbine. It is realized to make the thermal stress actually vibrate in the zone of the equal thermal stress during the startup of the steam turbine.. The mathematical models were built for control system of the homemade 200MW unit .At the same time, the paper improved the controller of the DEH control system. The traditional PID control system based on exact mathematical models could not meet the demand because the difficulties of steam turbine control are many uncertain disturbing factors which affect the output parameters (speed ,power).And because the great difference of the delay of the process change was caused by disturbing factors, the designed control system could not meet satisfied purposes under all working conditions. One of the solving methods is change the control strategy. The author adopted advanced control which integrates the self-turning factor fuzzy control and traditional P1 control to build the controller .The system constructed by the controller has fast response, small overresponding rate and strong resisting disturbance etc.更多还原