水蓄冷空调系统安全运行控制动态模拟

发布时间：2018-08-25 19:34

【摘要】：蓄冷空调将冷量产生的时间与使用的时间分离,在用电低谷时蓄冷,在用电高峰时段释冷,对电网起到了削峰填谷的作用,对保障电网的安全运行起到重大作用,具有良好的经济效益和社会效益。不同控制策略对蓄冷空调系统运行的节能性、经济性及运行的安全稳定性产生极大地影响,本文针对水蓄冷系统特性,建立水蓄冷空调系统模拟平台,分析系统在不同控制策略下各设备的安全稳定性及经济与节能性。水蓄冷空调系统设计以计算日逐时负荷为基础,本文利用建筑能耗模拟软件DeST模拟确定建筑全年负荷,并以此为基础对水蓄冷空调系统进行了设备选型及系统形式的确定。总结和建立水蓄冷空调系统各设备数学模型,在TRNSYS平台中建立水蓄冷空调模拟平台,在平台中调试实现对水蓄冷控制中的各运行模式及控制策略的实施。为实现水蓄冷的优化控制,提出以全天运行费用最低为目标函数的优化方程,建立冷机在优化计算中耗功量计算数学模型,并利用线性规划中单纯形法求出最优解。选取典型日,在模拟平台中,运行冷机优先与优化控制两种控制策略,对比冷机运行的安全稳定性、节能性与经济性,发现若控制优化策略制定不当会导致冷机运行不稳定：优化控制在经济性上优势明显,但没能有效降低系统能耗；同时建筑物日负荷偏离计算日越远,优化控制较冷机优先节省运行费用越明显。
[Abstract]:The cold storage air conditioning separates the time of producing the quantity of cold from the time of use, stores the cold at the low point of electricity consumption, and releases the cold during the peak period of electricity consumption, which plays an important role in cutting the peak and filling the valley of the power grid and ensuring the safe operation of the power network. It has good economic and social benefits. Different control strategies have a great influence on the energy saving, economy and safety and stability of the storage air conditioning system. In this paper, the simulation platform of the water storage air conditioning system is established according to the characteristics of the water storage air conditioning system. The safety, stability, economy and energy efficiency of the system under different control strategies are analyzed. The design of water storage air conditioning system is based on the calculation of hourly load per day. In this paper, building energy consumption simulation software DeST is used to determine the annual load of the building, and on this basis, the equipment selection and system form of the water storage air conditioning system are determined. The mathematical models of water storage air conditioning system are summarized and established. The simulation platform of water storage air conditioning system is established on the TRNSYS platform. The operation mode and control strategy of water storage control are implemented by debugging in the platform. In order to realize the optimal control of water storage, an optimization equation with the lowest operating cost per day as the objective function is proposed, and the mathematical model of power consumption calculation in the optimization calculation of the cooling machine is established, and the optimal solution is obtained by using the simplex method in linear programming. Selecting typical days, in the simulation platform, two control strategies, priority and optimization control, are used to compare the safety, stability, energy saving and economy of the operation of the cold machine. It is found that if the control optimization strategy is not made properly, the operation of the cooling machine will be unstable: the optimization control has obvious advantages in economy, but it can not effectively reduce the energy consumption of the system, and the daily load of the building deviates from the calculated day. The more obvious the operation cost is, the better the optimal control is compared with the cooling machine.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831

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