用于削减工业园区用电功率峰值的蓄冷空调系统的动态建模和优化控制

Dynamic modeling and optimal control of cold-storage air-conditioning system for reducing peak load of industrial park

蓄冷可以通过利用峰谷电价差,使空调系统更加经济,还可以作为一种间接蓄电措施,在峰电时段释放冷量,减少空调系统耗电,实现削减用电峰值功率的功能。对工业园区内需要24 h供冷的、包含基载的蓄冷空调系统的控制进行优化建模,在满足供冷及削峰需求条件下,以经济最优化为目标,分别针对非削峰日、2类削峰日提出相应的控制策略。并以工业园区某一水蓄冷空调系统的控制为例进行了算例分析,结果表明蓄冷空调在削峰时具有削峰幅度大、削峰时间长的优势。另外,当该日冷负荷需求越大时,2类削峰日对蓄冷空调系统运行费用的影响越大,此时可能需要增加削峰补贴电价。

Cold-storage technology can be used to make the taking the advantage of the electricity price difference between energy storage means,to reduce the peak load by releasing air-conditioning system more economic by peak and valley periods and,as an indirect the stored cold for lowering the power consumption of air-conditioning system during peak period. An optimal control model is established for the cold-storage air-conditioning system of industrial park,which operates 24 hours a day,including base loads. With the most economic operation as the object,different control strategies are given for three peak-load reduction modes to meet the requirements of daily operation for both cooling and peak-shifting. As an example,the control of a water-storage air-conditioning system of an industrial park is analyzed and results suggest that,with wider reduction range and longer reduction period,the cold-storage air-conditioning system has advantages in peak-load reduction;the higher the daily cooling load is,the greater the influence of peak-load reduction on the operational cost of cold-storage air-conditioning system will be,thereby the compensation for peak-load reduction being considered.