供热机组的热电负荷分配

Distribution of Thermal and Electric Load in Heat-Supply Turbine Sets

根据供热机组的基本特性，将复杂的供热机组按照供热循环和凝汽循环划分为一定数目的简单等效机组，为了能更准确地描述机组的热力特性，采用考虑辅助汽水系统的单元进水系数法来确定机组的特性方程，然后建立相应的机组热电负荷分配的混合整数线性规划优化模型．实例证明，通过划分等效机组建立的负荷优化调度模型可靠性强，计算时间短，可以实时指导热电厂的最佳经济运行，不需投资仅通过优化调度就可使燃料消耗量约降低1%～3％．

According to the characters of the heat-supply turbine sets, the complicated sets are divided into several equivalent simple units in terms of the heating cycling and condensing cycling. To describe the units more accurately, the character functions of the equivalent units are found with inflow coefficient of the heat units where the auxiliary stream-water system is considered, then a mixed integer linear programming（MILP）model is established to optimize the distribution of the thermal and electric load in the heat-supply sets via the character functions. The results verify the efficiency and reliability of this model, which enables the thermoelectricity sets to operate optimally under a real time guidance, and the consumption of fuel can be cut down by 1% to 3%.