An Adaptive Control Strategy for Energy Storage Interface Converter Based on Analogous Virtual Synchronous Generator

作     者：Feng Zhao Jinshuo Zhang Xiaoqiang Chen Ying Wang 

作者机构：School of Automation and Electrical EngineeringLanzhou Jiaotong UniversityLanzhou730070China 

出 版 物：《Energy Engineering》 (能源工程（英文）)

年 卷 期：2024年第121卷第2期

页      面：339-358页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：funded by the National Natural Science Foundation of China(52067013) and the Provincial Natural Science Foundation of Gansu(20JR5RA395) 

主　　题：Adaptive control analogous virtual synchronous generator DC/DC converter inertia of DC microgrid DC microgrid with PV and BES battery DC bus voltage 

摘      要：In the DC microgrid,the lack of inertia and damping in power electronic converters results in poor stability of DC bus voltage and low inertia of the DC microgrid during fluctuations in load and photovoltaic *** address this issue,the application of a virtual synchronous generator(VSG)in grid-connected inverters control is referenced and proposes a control strategy called the analogous virtual synchronous generator(AVSG)control strategy for the interface DC/DC converter of the battery in the ***,a flexible parameter adaptive control method is introduced to further enhance the inertial behavior of the AVSG ***,a theoretical analysis is conducted on the various components of the DC microgrid,the structure of analogous virtual synchronous generator,and the control structure’s main parameters related to the DC microgrid’s inertial ***,the voltage change rate tracking coefficient is introduced to adjust the change of the virtual capacitance and damping coefficient flexibility,which further strengthens the inertia trend of the DC ***,a small-signal modeling approach is used to analyze the approximate range of the AVSG’s main parameters ensuring system ***,conduct a simulation analysis by building the model of the DC microgrid system with photovoltaic(PV)and battery energy storage(BES)in MATLAB/*** results from different scenarios have verified that the AVSG control introduces fixed inertia and damping into the droop control of the battery,resulting in a certain level of inertia ***,the additional adaptive control strategy built upon the AVSG control provides better and flexible inertial support for the DC microgrid,further enhances the stability of the DC bus voltage,and has a more positive impact on the battery performance.