基于改进FCM算法的机组能效特性分析  

Analysis of Unit Energy Efficiency Characteristics Based on Improved FCM Algorithm

作　　者：张胜华 钟嘉皇 董美蓉[2] Zhang Shenghua;Zhong Jiahuang;Dong Meirong(Guangzhou Zhongdianlixin Thermal Power Co.,Ltd.,Guangzhou 510000,China;School of Electric Power,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]广州中电荔新热电有限公司,广州510000 [2]华南理工大学电力学院,广州510640

出　　处：《发电设备》2024年第6期376-382,388,共8页Power Equipment

摘　　要：基于多层级筛选最佳聚类数自适应的模糊C均值(FCM)算法对某热电联产机组进行能效特性分析.对传统聚类算法进行改进,提出一种基于多层级严格筛选的最佳聚类数自适应确定方法,得到机组在不同负荷下的能效特性;采用最小二乘法拟合得到机组运行特性曲线,并且对牛顿插值算法得到的机组运行能效特性曲面进行对比分析.结果表明:在不同外界约束下,机组性能存在一定的差异,通过能效特性曲面,可以直观地看出2台机组在不同负荷下的能效特性差异及每台机组性能较优的负荷工况.在电负荷为225 MW,热负荷(供热蒸汽质量流量)为72.5~88.5t/h的工况,1号机组的供电煤耗率比2号机组高,并且随着热负荷的增加,煤耗率差值呈现先增大后减小的趋势.因此,在负荷调整时,可以优先安排2号机组低负荷运行.For a heat and power cogeneration unit,analyses were conducted on energy efficiency characteristics based on adaptive multi-level filtering fuzzy C-means(FCM)algorithm with the optimal clustering number.Through improving the traditional clustering algorithm,an adaptive optimal clustering method was proposed based on multi-level strict screening mechanism,so as to obtain the energy efficiency characteristics of unit under different load conditions.The curves of unit operation characteristics were fitted by least squares method,while comparisons and analyses were carried out based on the surfaces of unit operation energy efficiency characteristics from Newton interpolation algorithm.Results show that,the unit performances have certain differences with different external constraints.From the surfaces of energy efficiency characteristics,the difference between the energy efficiency characteristics of two units under different loads and the load condition with a better operation performance of each unit can be visually displayed.Under the condition of 225 MW electric load and 72.5-88.5 t/h heat load(heat-supply steam mass flow rate),the net coal consumption rate of No.1 unit is higher than that of No.2 unit,and with the increase of heat load,the difference in coal consumption rate firstly increases and then decreases.Therefore,No.2 unit can be prioritized to operate under low load condition.

关 键 词：热电联产 能效特性 改进聚类算法 牛顿插值算法 煤耗率 

分 类 号：TM621[电气工程—电力系统及自动化]