配置储热罐的供热机组运行定值计算

发布时间：2018-03-21 20:55

本文选题：供热机组　切入点：储热罐　出处：《华北电力大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：供热机组以热定电的运行方式导致调峰能力不足是冬季中国三北地区大量弃风的重要原因之一。储热罐作为一种蓄能手段能够从一定程度上实现供热机组热电解耦。基于机组回热系统热力学分析,定义抽汽-负荷增益系数,分析供热抽汽流量与机组发电负荷间的定量关系,进而获得变供热工况下的锅炉负荷定值。基于供热机组运行特性及热网加热器换热特性分析,对储热罐工作过程中的运行流量进行定值,对供热机组调峰能力区间进行定值约束。结果表明,所提增益系数能够精确计算变供热工况下机组运行参数,所提定值方法能准确直观地表现储热罐对供热机组调峰运行的影响能力和储热罐运行过程中的定值问题,定值结果为机组和储热罐的安全灵活运行提供指导。
[Abstract]:It is one of the important reasons that heat storage tank, as a means of energy storage, can realize thermal electrolysis of heat supply unit in winter, which is one of the important reasons that lead to insufficient peak-shaving capacity due to the operation mode of heat fixed power supply unit in winter in the three northern regions of China. Based on thermodynamic analysis of unit regenerative system, This paper defines the gain coefficient of extraction steam load and analyzes the quantitative relationship between the steam flow rate of heat supply and the generating load of generating unit, and then obtains the fixed value of boiler load under variable heating condition. Based on the analysis of operation characteristics of heating unit and heat transfer characteristic of heating network heater, The operating flow rate of the heat storage tank is fixed and the peak shaving capacity of the heating unit is constrained. The results show that the proposed gain coefficient can accurately calculate the operating parameters of the unit under the variable heating condition. The proposed method can accurately and intuitively show the influence of heat storage tank on peak shaving operation of heat supply unit and the problem of setting value in the operation of heat storage tank. The results provide guidance for the safe and flexible operation of heat storage tank and unit.
【作者单位】：华北电力大学新能源电力系统国家重点实验室;
【基金】：国家重点研发计划项目(2017YFB0602105)
【分类号】：TM621

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