含混合储能直流微电网混合势函数建模及稳定性分析  

Hybrid potential function modeling and stability analysis of DC microgrid with hybrid energy storage

作　　者：张国澎[1] 郑钰麒 郑征[1] 陈纪凯 黄涛 Zhang Guopeng;Zheng Yuqi;Zheng Zheng;Chen Jikai;Huang Tao(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Dipartimento Energia,Politecnico di Torino,Torino 10129,Italy)

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454003 [2]都灵理工大学能源系,都灵10129

出　　处：《国外电子测量技术》2023年第4期38-48,共11页Foreign Electronic Measurement Technology

基　　金：国家自然科学基金(U1804143);河南省自然科学基金(212300410147)项目资助。

摘　　要：针对含恒功率负荷的混合储能直流微电网大扰动稳定及储能变换器建模问题,在推导混合储能(hybrid energy storage system,HESS)脉宽调制开关网络等效模型基础上,提出了一种基于混合势函数理论的含HESS直流微电网稳定性判据及分析方法。首先,计及HESS充放电特性,将含HESS直流微电网系统的工作状态划分为buck和boost工作模式;接着,分别建立上述两种工作模式下基于脉宽调制开关网络等效模型的直流微电网系统混合势函数模型;最后,应用混合势函数理论第3稳定性定理,分别推导得到buck和boost工作模式下的直流微电网大扰动稳定性判据,并对比基于开关平均模型的系统稳定性判据,提出的稳定性判据推导方法对系统动态行为预测更为准确。仿真验证了所提稳定性分析方法的合理性以及混合势函数判据的先进性。Aiming at the large disturbance stability of hybrid energy storage DC microgrid with constant power load and the modeling of energy storage converter,based on deducing the equivalent model of hybrid energy storage system(HESS)PWM switching network.A stability criterion and analysis method of DC microgrid containing HESS based on mixed potential function theory is proposed.Firstly,considering the charge-discharge characteristics of HESS,the operating states of the DC microgrid system containing HESS are divided into buck and boost operating modes.Then,the hybrid potential function models of DC microgrid system based on the equivalent model of pulse width modulated switching network are established respectively under the above two operating modes.Finally,using the third stability theorem of the mixed potential function theory,the large disturbance stability criteria of the DC microgrid under buck and boost operating modes are derived respectively.Compared with the system stability criterion based on switching average model of buck operation mode,this paper proposes that the derivation method of stability criterion is more accurate to predict the dynamic behavior of the system.The simulation verifies the rationality of the proposed stability analysis method and the advancement of the hybrid potential function criterion.

关 键 词：直流微电网 混合储能 混合势函数 大扰动稳定性 恒功率负荷 

分 类 号：TM46[电气工程—电器]