计及需求侧管理的热泵-储能犁微电网能量优化策略

摘要

为减少储能总容量和蓄电池动作次数,提出一种计及需求侧管理的微电网能量优化策略.考虑热泵的负荷特性,根据产热量与热泵工质流速的关系建立相应的热泵系统模型.根据热负荷日需求曲线,对热泵的储热容量模型进行分析与计算;按照频率区间将微电网功率波动划分为高频成分与中低频成分,并采用模糊控制理论将波动功率在热泵、蓄电池与超级电容间进行分配.该策略对微电网进行削峰填谷,对功率波动进行抑制,实现了微电网的可靠、经济运行.算例验证了所提能量管理策略的正确性与有效性.%A microgrid energy optimization strategy considering the demand-side management is proposed to reduce the total capacity of energy storage system and the action times of battery.Based on the load characteristics of heat pump,a model of heat pump system is established according to the relationship between the heat production and the flow rate of working fluid.The heat storage capacity model is analyzed and calculated according to the daily demand curve of heat load.The power fluctuation of microgrid is divided into high and low frequency components according to the frequency intervals and the fuzzy control theory is adopted to allocate the fluctuated power among heat pumps,batteries and super capacitors.The proposed strategy alleviates the peak and valley loads of microgrid to restrain its power fluctuation for its reliable and economical operation.Case verification proves the correctness and effectiveness of the proposed strategy.