基于动态相量法的三相双有源桥直流变换器闭环系统建模与稳定性分析  

Modeling and Stability Analysis of Three⁃phase DAB DC Converter Closed⁃loop System Based on Dynamic Phasor Method

作　　者：钟庆[1] 梁铭 赵宇明 王钢[1] 汪隆君[1] ZHONG Qing;LIANG Ming;ZHAO Yuming;WANG Gang;WANG Longjun(School of Electric Power,South China University of Technology,Guangzhou 510640,China;Shenzhen Power Supply Bureau Co.Ltd.,Guangdong Shenzhen 518000,China)

机构地区：[1]华南理工大学电力学院,广州510640 [2]深圳供电局有限公司,广东深圳518000

出　　处：《电力电容器与无功补偿》2022年第4期124-130,共7页Power Capacitor & Reactive Power Compensation

基　　金：广东省自然科学基金项目(2021A1515012087);中国南方电网有限责任公司重点科技项目(090000KK52180116)

摘　　要：三相双有源桥(dual active bridge,DAB)直流变换器作为两个不同电压等级的直流电气系统的连接桥梁,能够实现能量的双向流动。对于闭环控制系统,DAB直流变换器控制器参数的选取影响着系统运行的稳定性。针对此问题,本文基于动态相量法对使用单移相控制策略的三相DAB直流变换器进行建模,并考虑了闭环控制器,得到状态空间模型。基于此推导系统小信号模型,根据小信号模型进行稳定性分析,最后进行仿真验证。研究表明,本文所提模型能够分析使用单移相控制策略的三相DAB直流变换器闭环系统的小信号稳定性。As a connection bridge of DC power systems with two different voltage classes,three⁃phase dual active bridge(DAB)DC converter can realize bidirectional flow of energy.As for closed⁃loop control system,the parameter selection of DAB DC converter controller effects operation stability of system.Aiming at this problem,the three⁃phase DAB DC converter using single phase shift control strategy is modeled on the basis of the dynamic phasor method in this paper,the closed⁃loop controller is taken into account and the state space model is obtained.On this basis,the small⁃signal model of the system is derived and the stability analysis is performed in accordance with the small signal model and,finally,the simulation verification is performed.The research shows that the model proposed in this paper can analyze the small⁃signal stability of three⁃phase DAB DC converter closed⁃loop system of the single phase shift control strategy.

关 键 词：三相双有源桥 动态相量法 小信号建模 稳定性分析 

分 类 号：TM46[电气工程—电器]