电动汽车接入直流配电系统的稳定性及虚拟惯量控制  

Stability and Virtual Inertia Control of DC Distribution System with Integration of Electric Vehicles

作　　者：魏智宇 彭克[1] 李海荣 陈佳佳[1] 徐丙垠[1] 赵学深[1] WEI Zhiyu;PENG Ke;LI Hairong;CHEN Jiajia;XU Bingyin;ZHAO Xueshen(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]山东理工大学电气与电子工程学院

出　　处：《电力系统自动化》2019年第24期50-58,共9页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目（51807112）;山东省自然科学基金资助项目（ZR2017LEE022）~~

摘　　要：直流配电系统是未来城市配电系统新的发展方向,随着电动汽车的日益普及,电动汽车的充放电将对直流配电系统电压稳定性产生重大影响。首先,建立了电动汽车不同充放电方式下直流配电系统小信号导纳模型,并利用奈奎斯特稳定判据讨论了不同充放电方式下直流配电系统电压的稳定性差异。其次,为提高系统阻尼及系统电压稳定性,提出了电动汽车不同充放电模式的统一虚拟惯量控制方法,并对比分析了引入虚拟惯量前后系统电压的稳定性差异。最后,通过时域仿真算例和实验验证了理论分析的正确性以及所提方法的有效性。DC distribution system will play an important role in the future urban distribution system. With the increase of electric vehicles(EVs), the charging and discharging requirements of EV have a great impact on the voltage stability of the DC distribution system. Firstly, this paper develops a small-signal admittance model of DC distribution system with different EV charging and discharging modes. According to the Nyquist stability criterion, the voltage stability differences of DC distribution system with different charging and discharging modes are discussed. Secondly, in order to further improve the system damping and voltage stability, this paper proposes a unified virtual inertia control strategy with different EV charging and discharging modes. And the voltage stability of the system with and without virtual inertia control are compared. Finally, the correctness of theoretical analysis and the effectiveness of the proposed method are verified through time-domain simulation and experiment.

关 键 词：直流配电系统 电动汽车 小信号导纳模型 虚拟惯量 电压稳定性 

分 类 号：TM7[电气工程—电力系统及自动化]