摘要
由于火电机组在线能耗监测现场测量条件和仪表测量精度的限制,在线能耗监测的系统给出的煤耗通常会有较大的误差。为解决该项技术难题,引入电厂热经济性状态方程来动态求解汽轮机热耗率,应用能质平衡思想建立全系统热力系统汽水分布矩阵方程;同时研究锅炉效率的动态波动特性,重点分析煤质、灰渣以及散热等影响因素,建立排烟热损失、固体未完全燃烧热损失、散热损失的理论计算模型;对于厂用电率动态计算,重点放在电度表的精度和给出厂用电公用部分的分摊方法。结合性能试验验证机组能耗模型的在线计算精度,试验结果表明该火电机组能耗在线计算监测模型能够满足ASME标准的精度要求。
Because of the limitation of on-line energy consumption measurement condition and instrument measurement precision,the coal consumption of on-line monitoring system usually has big error.To solve this technical problem,this paper adopts the state equation of thermal economy of power plant to dynamically solve the steam turbine heat rate,applying the idea of energy mass balance,the steam water distribution matrix equation of the whole thermal system is established.At the same time,the dynamic fluctuation characteristics of boiler efficiency are deeply studied,the factors of coal quality ash and heat dissipation are analyzed,the theoretical calculation models of exhaust heat loss,solid incomplete combustion heat loss and heat dissipation loss are established.For the dynamic calculation of auxiliary power consumption rate,the emphasis is on the accuracy of the electric meter and the allocation method of the public part of the power supplied to the factory.The online calculation accuracy of the unit energy consumption model is verified and the test results show that the on-line energy consumption calculation and monitoring model can meet the accuracy requirements of ASME standards.
作者
聂涛
邵峰
杨文正
何新荣
王忠熬
NIE Tao;SHAO Feng;YANG Wenzheng;HE Xinrong;WANG Zhong′ao(Guoneng Ningxia Heating Co.,Ltd.,Yinchuan 750004,China;Guoneng Nanjing Power Experimental Research ICL,Nanjing 210046,China)
出处
《湖南电力》
2023年第2期60-65,共6页
Hunan Electric Power
关键词
在线能耗监测
运行热耗率
热经济性状态方程
标准煤耗量
动态煤耗性能曲线
online energy consumption monitoring
operating heat rate
thermal economy equation of state
standard coal consumption
dynamic coal consumption performance curve
