微电网能量型储能器件的建模研究

能量型储能器件是当今微电网发展的重要组成部分,能够平抑微电网中的不平衡电量,保证微电网的能量平衡和频率稳定。本文首先研究了蓄电池的常用模型,然后在蓄电池四阶动态模型的基础上研究了其短期放电模型和长期放电模型。其次,本文研究了超级电容的一阶模型和简化一阶模型,并且阐述了超级电容的两种RC网络模型,更符合其使用实际情况。最后,本文阐述了各种模型的优劣和适宜应用的场景。

energy-based energy storage devices are an important part of the development of micro-grid,which can reduce unbalanced power in micro-grid and ensure energy balance and frequency stability of micro-grid.In this paper,the commonly used model of battery is studied firstly,and then the short-term discharge model and long-term discharge model are studied on the basis of the fourth-order dynamic model of battery.Secondly,this paper studies the first-order model and simplified first-order model of ultracapacittance,and describes two RC network models of ultracapacittance,which are more in line with the actual situation of its application.Finally,this paper describes the advantages and disadvantages of various models and the suitable application scenarios.