Abstract
Deeply research vanadium redox flow battery (VRB) energy storage technology in the field of power system, it should establish battery system simulating model to study the system operating characteristics. Electrochemical battery, however, belongs to non-linear time-varying system, and the internal chemical material properties are susceptible to variety of factors. Battery model should not be simply equivalent to an ideal voltage source or current source. The target model should reflect most characteristics of battery, such as the internal resistance, polarization, self-discharge, shunt current loss and temperature or even other factors which may influence the operating characteristics of the battery system. First it defined the key parameters of VRB characteristics from the point of application, then based on the external characteristics of VRB system, the system-level quasi-steady-state model had been established, which contains the factor time-varying, temperature change and shunt current etc. Then by simulating on the platform of PSCAD/EMTDC, the model proved to be correct and well reflected the charge and discharge characteristics and dynamic response characteristics of VRB system.
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