集群空调负荷提供微电网调频备用研究

Research of air conditioners providing frequency controlled reserve for microgrid

微电网中空调负荷所占比例逐年增长,集群空调负荷提供备用容量潜力巨大。为准确描述集群空调负荷功率需求特性,根据空调负荷工作过程热交换平衡原理建立基于一阶物理模型的集群负荷模型。考虑负荷响应特性,提出集群负荷目标温度设定值与系统频率线性响应关系的负荷调频模型,通过调整集群负荷目标温度提供调频备用,降低对用户舒适度影响。仿真结果表明,集群负荷参与微电网调频具有可行性和实用性,为负荷侧参与微网运行控制提供基础。

With their proportion increasing gradually, air conditioners can be a feasible option to provide certain amount of reserve for microgrid. A clustered model based on first-order physical model is provided according to the heat exchange balance. The model can depict appropriately the working characteristics of air conditioners. Considering load response characteristics, a frequency adjustment model is provided, which conditioners＇ setting temperatures are inversely proportional to grid frequency. This frequency adjustment model reduces the influence to users＇ comfort. Simulation results verify the effectiveness and usefulness for clusters air conditioners, providing reserve for microgrid.