A prediction method for the industrial extraction condensing steam turbine shaft power, this method is a thermodynamic model to extraction condensing steam turbine as the foundation, considering the actual industrial application process, the steam turbine by environmental temperature, cooling water flow and temperature, and the influence of many other unknown factors, according to the actual industrial data, the introduction of the cooling water quality, steam quality of main steam, influence of steam extraction pressure and other parameters on the condensing steam turbine steam and exhaust steam quality, using neural network regression method, obtained the actual condenser pressure extraction condensing steam turbine in industrial application and steam temperature, then by the IAPWS-IF97 industrial standard of water and steam is calculated by the actual extraction turbine steam and exhaust steam enthalpy value, then the application of thermodynamic methods, the actual calculation of steam turbine shaft Power output. It avoids the direct estimation of isentropic efficiency of steam turbine, and improves the prediction accuracy of shaft power in industrial application of steam turbine. It provides the basis and basis for the optimization and reconstruction of utility system.
【技术实现步骤摘要】
【技术保护点】
１．一种工业抽汽冷凝式蒸汽轮机的轴功率预测方法，其特征是，包括以下步骤：步骤１仪表终端采集工业历史数据：汽轮机主蒸汽入口流量Ｆｉ、压力Ｐｉ、温度Ｔｉ、抽汽流量Ｆｅ和压力Ｐｅ，冷却水的流量Ｆｃ和温度Ｔｃ，并对所采集数据进行归一化处理；步骤２上位机以冷凝器的冷却水循环系统进入冷凝器的冷却水的流量Ｆｃ、温度Ｔｃ和进入凝汽器的汽轮机排汽流量Ｆｏ，作为凝汽器压力神经网络模型输入，求解排汽压力Ｐｏ，即为凝汽器内的绝对压力；步骤３上位机以主蒸汽入口流量Ｆｉ、压力Ｐｉ、温度Ｔｉ、抽汽流量Ｆｅ和压力Ｐｅ作为抽汽温度神经网络模型输入，得到抽凝式汽轮机的实际抽汽温度Ｔｅ；步骤４上位机基于前述各量计算蒸汽轮机入口、抽汽和排汽的实际比焓值Ｈｉ、Ｈｅ和Ｈｏ，并结合修正后的汽轮机做功过程的热力学模型求解汽轮机的实际轴功率输出Ｗｓ，所述修正后的汽轮机做功过程的热力学模型如下所示：（ｍａｔｈ）??（ｍｒｏｗ）?（ｍｆｅｎｃｅｄｏｐｅｎ＝＇｛＇ｃｌｏｓｅ＝＇＇）?（ｍｔａｂｌｅ）?（ｍｔｒ）?（ｍｔｄ）?（ｍｕｎｄｅｒｏｖｅｒ）?（ｍｉ）＆Ｓｉｇｍａ；（／ｍｉ）?（ｍｒｏｗ）?（ｍｉ）ｉ（／ｍｉ）?（ｍｏ）＝（／ｍｏ）?...
【技术特征摘要】
【专利技术属性】
技术研发人员：钱锋，赵亮，杜文莉，叶贞成，李泽秋，
申请(专利权)人：华东理工大学，
类型：发明
国别省市：31
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