城市集中供热管网调控滞后特性的研究
Research on regulation hysteresis characteristics of urban centralized heating network
摘要：
城市集中供热一级管网传输距离长、拓扑结构复杂、覆盖面积大,热源侧针对用户侧进行负荷调节时往往存在滞后特性。为实现实时精准按需供热,本文建立了供热一级管网延时特性的仿真模型,针对不同类型的热用户进行调控滞后特性分析,并通过历史数据建立模型,分析实际供热过程中调控的滞后特性。最后将理论与实际供热情况进行对比,发现换热站距离和供暖季不同阶段对温度调控滞后时间具有不同程度的影响,末端管网及供暖季末期的调控滞后特性更强。
Abstract：
The primary circuit of urban centralized heating has long transmission distance, complex topology structure, and large coverage area. When adjusting the load on the user side, there is often a hysteresis characteristic on the heat source side. In order to realize real-time and accurate on-demand heating, this paper establishes a simulation model of the delay characteristics of the heating primary circuit, and analyses the regulation hysteresis characteristics for different types of heat users. Then, a model is established based on historical data to analyse the hysteresis characteristics of regulation in the practical heating process. Finally, the theoretical and practical heating conditions are compared, and it is found that the distance of the heat exchange station and different stages of the heating season have different degrees of influence on the temperature regulation hysteresis time, and the regulation hysteresis characteristics of the end network and the end of the heating season are stronger.
Keywords:centralized heating system; heating network; heat exchange station regulation; heat user; network characteristic; hysteresis characteristic