全钒液流电池储能仿真模型及荷电状态监测方法研究

Simulation model advances in vanadium redox flow battery energy storage and monitoring method for state of charge

作为电化学储能技术之一的全钒液流电池(VRB),因其具有寿命长、安全性高、布置灵活等特点,是未来最有潜力实现长寿命、低成本的大规模储能技术。本文总结了电路模型和电化学模型两类全钒液流电池储能仿真模型:电路模型多是以固定的电路元件模拟电池回路串并联而成,电化学模型则是描述电池内部参数变化的数学模型。同时,本文总结了全钒液流电池常用的荷电状态(SOC)监测方法:开路电压法、电流积分法与卡尔曼滤波算法的基本原理及使用方法。SOC监测方法是对部分仿真模型的补充,以期构建更为完善的全钒液流电池储能系统。

As an electrochemical energy storage technology,the all-vanadium redox flow battery(VRB)is the most promising large-scale energy storage technology with long life and low cost due to its high safety and flexible layout.This article summarizes the simulation model of all-VRB energy storage in two types of models,namely,circuit and electrochemical.Circuit models mainly comprise fixed circuit elements that simulate battery loops in series and parallel,while electrochemical mathematical models describe the internal battery parameters.At the same time,this article summarizes commonly used state of charge(SOC)monitoring methods for all-vanadium redox flow batteries,including the basic principles and usage methods of the open-circuit voltage method,current integration method,and Kalman filter algorithm.The SOC monitoring method supplements simulation models to build a complete all-VRB energy storage system.