农村空气源热泵系统蓄热模式对电网负荷的影响分析

Analysis on the influence of heat storage modes of air source heat pump system on power grid load in rural area

空气源热泵由于高效节能等优势在农村清洁取暖中得到了广泛应用,但大规模的使用也造成了电网尖峰负荷的增加及不平衡率的增大,对电网的可靠性提出了新的挑战。为评估蓄热技术对电网削峰填谷的作用潜力,选取典型农村建筑为研究对象,在TRNSYS平台搭建供暖仿真模型,模拟空气源热泵供暖系统不同蓄热模式对电网的影响。结果表明:相比于空气源热泵直接供暖模式,水箱蓄热的供暖模式和建筑本体蓄热的供暖模式可在保证室内热舒适性的前提下分别使电网最大峰谷差率降低52.5%和47.7%,电网负荷率增加9.9%和8.8%,不仅有利于电网的平稳运行,而且提高了发电设备利用率。在峰谷电价条件下,蓄热供暖模式的运行费用降低31.1%。

The air source heat pump has been widely used in rural clean heating due to its advantages of high efficiency and energy saving,but its large-scale use also causes the increase of peak load and imbalance rate of the power grid,which poses a new challenge to the reliability of the power grid.In order to evaluate the potential of heat storage technology in peak-cutting and valley-filling of the power grid,the typical rural building is selected and heating simulation model of the air source heat pump heating system is built on TRNSYS platform to simulate the influence of different heat storage modes on the power grid.The results show that:compared with the direct heating mode of air source heat pump,the heating system with water tank heat storage and the heating system with building body heat storage can reduce the maximum peak valley difference by 52.5%and 47.7%,respectively,and increase the load rate of power grid by 9.9%and 8.8%,which is not only conducive to the stable operation of power grid,but also improves the utilization rate of power generation equipment.Under the condition of peak valley electricity price,the system operation cost is reduced by 31.1%.