新型直流配电系统仿真建模及稳定性分析  

Simulation Modeling and Stability Analysis of New Type DC Power Distribution System

作　　者：李家旭 张建洲 魏翔[3] LI Jiaxu;ZHANG Jianzhou;WEI Xiang(Guangzhou Metro Design and Research Institute Co.,Ltd.Guangzhou,Guangdong 510010,China;Guodian NARI Nanjing Control System Co.,Ltd.,Nanjing,Jiangsu 210000,China;Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210023,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510010 [2]国电南瑞南京控制系统有限公司,江苏南京210000 [3]南京邮电大学,江苏南京210023

出　　处：《东北电力技术》2022年第6期1-6,28,共7页Northeast Electric Power Technology

基　　金：国家重点研发计划项目(2017YFA0700304)。

摘　　要：近年来,电动汽车(electric vehicles,EV)在应对环境恶化以及能源危机背景下得到广泛应用。在EV集成系统中,直流配电系统作为一种技术上和经济上优越的集成策略可以更有效地承载光伏(photovoltaic,PV)模块,但由于DC-DC恒功率特性,容易出现不稳定。提出了一种提高直流配电系统稳定性的方法,该系统将EV与交流电网集成在一起,使用非线性控制策略,所提出的稳定性增强方法通过改变双向DC-DC转换器的功率设定点来优化不稳定问题,而无需更改系统参数或硬件。通过试验验证了该方法在PSCAD/EMTDC软件环境中研究系统的有效性。In recent years,electric vehicles(EV)have been widely used in response to environmental degradation and energy crisis.In the EV integrated system,as a technically and economically superior integration strategy,the DC power distribution system can carry photovoltaic(PV)modules more effectively.But due to the DC⁃DC constant power characteristics,it is prone to instability.A method to improve the stability of the DC power distribution system is proposed.The system integrates the EV with the AC grid and uses a non⁃linear control strategy.The proposed stability enhancement method changes the power setting of the bidirectional DC⁃DC converter.It points to optimize instability problems without changing system parameters or hardware.Experiments verify the effectiveness of the pro⁃posed method in the PSCAD/EMTDC software environment.

关 键 词：直流配电系统 恒功率特性 直流电压控制 稳定性增强 

分 类 号：TM721.1[电气工程—电力系统及自动化]