城市集中供热系统热负荷预测与二次网节能控制方法  

Heat load prediction and energy saving control method of secondary network in urban central heating system

作　　者：孙鹏 SUN peng(Beijing District Heating Group Co.,Ltd.,Beijing 100028,China)

机构地区：[1]北京市热力集团有限责任公司,北京100028

出　　处：《区域供热》2023年第6期54-60,共7页District Heating

摘　　要：为了解决城市集中供热系统由时变性、非线性导致的控制难度高的问题,研究城市集中供热系统热负荷预测与二次网节能控制方法。将历史热负荷数据作为输入,选取高斯核函数为核函数,利用支持向量机输出热负荷预测结果。依据热负荷预测结果确定二次网的理想供水温度,设置理想供水温度与实际供水温度之间的差值为输入,利用模糊控制方法实时调节PID控制参数,通过优化后的控制参数控制二次网的供水温度,实现城市供热系统二次网的节能控制。实验结果表明,该方法可有效利用热负荷预测结果,将二次网供水温度控制在理想范围内,能够实现二次网的节能控制,具有调节时间短、超调小的优势。In order to solve the problem of high control difficulty caused by time variability and nonlinearity of urban central heating system,heat load forecasting and energy saving control of secondary network of urban central heating system are studied.The historical heat load data is taken as the input of support vector machine,and the Gaussian kernel function is selected as the kernel function.The heat load prediction results are output by support vector machine.According to the heat load prediction results,the ideal water supply temperature of the secondary network is determined,and the difference between the ideal water supply temperature and the actual water supply temperature is set.As the input of PID controller,the fuzzy control method is used to adjust the PID control parameters in real time.Through the optimized control parameters,the water supply temperature of the secondary network is controlled to realize the energy saving control of the secondary network of the urban heating system.The experimental results show that the method effectively uses the heat load prediction results to control the water supply temperature of the secondary network within the ideal range,has the advantages of short regulation time and small overshoot,and realizes the energy saving control of the secondary network.

关 键 词：集中供热系统 热负荷预测 二次网 节能控制方法 支持向量机 

分 类 号：TU995[建筑科学—供热、供燃气、通风及空调工程]