基于数据驱动的汽轮机主蒸汽流量软测量  

Soft Sensing of Main Steam Flow of Steam Turbine Based on Data Driven

作　　者：徐红伟[1] 李美双 李崇晟[1] 何岩 吴智群[1] 何新[1] XU Hongwei;LI Meishuang;LI Chongsheng;HE Yan;WU Zhiqun;HE Xin(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;Huaneng Luoyang Thermal Power Co.,Ltd.,Luoyang 471000,Henan Province,China)

机构地区：[1]西安热工研究院有限公司,西安710054 [2]华能洛阳热电有限责任公司,河南洛阳471000

出　　处：《动力工程学报》2023年第6期742-748,共7页Journal of Chinese Society of Power Engineering

摘　　要：为提高主蒸汽流量的计算准确性,以汽水系统稳态工况下基于热量平衡和流量平衡计算的主蒸汽流量作为目标值,将模型输入参数限制在高压缸范围内,以此建立主蒸汽流量预测模型,借助高压缸内蒸汽的高流速带来的参数之间近乎零迟滞的特性,使得以稳态工况数据训练的模型可直接应用于非稳态工况,最后通过实例对所提方法进行验证。结果表明:所提软测量模型适用工况范围大,受其他因素干扰较少,实际案例验证了模型的准确性,具备工程实际应用价值。In order to improve the calculation accuracy of the main steam flow,a prediction model was established while the main steam flow based on the heat balance and flow balance calculation under the steady-state condition of the steam-water system was taken as the target value,and the input parameters were limited to the range of high-pressure cylinder.With the characteristics of almost no hysteresis among parameters caused by the high flow rate of steam in the high-pressure cylinder,the model trained with the data under steady-state conditions could be directly applied to unsteady working conditions.Finally,the proposed method was virified by an example.Results show that the method has a wide range of working conditions and is less disturbed by other factors.The actual case verifies the accuracy of the model which has practical application value in engineering.

关 键 词：火电机组 数据驱动 主蒸汽流量 软测量 支持向量机 

分 类 号：TK313[动力工程及工程热物理—热能工程]