基于输入均压与虚拟直流电机相结合的直流电能路由器控制策略  

DC electric energy router control strategy combining the input voltage sharing and virtual DC machine

作　　者：李涛[1] 关维德 王旭红[1] 夏向阳[1] 杨昀 钟健 LI Tao;GUAN Weide;WANG Xuhong;XIA Xiangyang;YANG Yun;ZHONG Jian(School of Electrical&Information Engineering,Changsha University of Science&Technology,Changsha 410114,China;Zhuzhou Power Supply Company,State Grid Hunan Electrica Power,Co.,Ltd.,Zhuzhou 412000,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410114 [2]国网湖南省电力公司株洲供电分公司,湖南株洲412000

出　　处：《电力科学与技术学报》2024年第3期253-263,共11页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51977014);湖南省教育厅科学研究项目(22A0213)。

摘　　要：针对中压直流配电网接入下的直流电能路由器在新能源出力等工况下,使用传统控制策略对直流母线的控制效果一般、电压易越限等问题,基于模块化的输入串联输出并联(input-series output-parallel,ISOP)型拓扑结构,提出一种基于输入均压与虚拟直流电机相结合的直流电能路由器控制策略。首先,研究输入均压控制过程中模块间的功率均衡控制特性并与输出均流控制进行比较;接着,将虚拟直流电机控制应用到控制算法中,使变流器模拟出直流电机的惯性特性;然后,对虚拟直流电机建立小信号数学模型,分析其工作机理以及参数对系统的影响;最后,在MATLAB/Simulink中搭建仿真模型进行验证。结果表明:所提控制策略能够在实现直流电能路由器各模块间功率均衡的同时,具有类似直流电机的惯量特性与阻尼特性,可显著提高直流配电网直流母线电压稳定性。For at the DC electric energy router in the MVDC distribution network,there are some issues when renewable energy sources fluctuate.Under these conditions,the traditional control strategy has a general control effect on the DC bus and the voltage is easy to violate.Based on the modular input-series-output-parallel(ISOP)type topology,a DC electric energy router control strategy combining the input voltage sharing and virtual DC machine is proposed.First,the power balancing control characteristics between the modules in the input voltage sharing control process are studied and compared with the output current sharing control;then,the virtual DC machine control is applied to the control algorithm so that the converter can simulate the inertia characteristics of DC machine;then,a small signal model of the virtual DC machine is established to analyze its working principle and the influence of parameters on the system.Finally,a simulation model is built in MATLAB/Simulink for verification.The results show that the proposed control strategy can achieve power balancing among the modules of the DC electric energy router while having inertia characteristics and damping characteristics similar to the DC machine,which can significantly improve the DC bus voltage stability of the DC distribution network.

关 键 词：直流电能路由器 直流配电网 输入均压 虚拟直流电机 直流母线电压 

分 类 号：TM46[电气工程—电器]