含电蓄热装置的离网型局域网系统能量平衡模型研究

Research on Energy Balance Model of Off-Grid Local Power System with Electric Thermal Storage Device

离网型局域网系统的能量平衡计算关乎整个系统的初始投资、设备使用效率及系统供能的可靠性。通过在系统能量平衡模型的搭建过程中,综合考虑电蓄体热额定加热功率、蓄热体额定容量、蓄热体剩余容量等边界条件,使能量平衡计算模型更丰富;同时引入电池充放电深度、蓄热体放热深度、电池转换效率、电热转换效率等参数,提高了计算精度,对减少项目初期投资、提高设备使用率及供能可靠性有深远的意义。

The energy balance calculation of off-grid local power system is vital to the initial investment of the entire system,the service efficiency of equipment and the reliability of system energy supply.During the development of the system energy balance model,the boundary conditions such as the rated heating power of the electric storage unit,the rated capacity of the heat storage unit,and the remaining capacity of the heat storage unit are comprehensively considered to obtain a more comprehensive energy balance calculation model;meanwhile,parameters such as the depth of battery charge and discharge,the heat release depth of the heat storage unit,the battery conversion efficiency,the electrothermal conversion efficiency are introduced into the model to improve the calculation accuracy which is significant in reducing the initial investment of the project,improving the equipment service efficiency and energy supply reliability.