基于虚拟负电阻的微电网下垂控制研究  

Research on droop control of microgrid based on virtual negative resistance

作　　者：王杨 涂建 陈强 潘成勇 WANG Yang;TU Jian;CHEN Qiang;PAN Cheng-yong(School of Electrical Engineering and Automation,Hubei Normal University,Huangshi 435002,China)

机构地区：[1]湖北师范大学电气工程与自动化学院,湖北黄石435002

出　　处：《湖北师范大学学报（自然科学版）》2023年第2期68-74,共7页Journal of Hubei Normal University：Natural Science

基　　金：湖北省教育厅项目(B2019130)。

摘　　要：孤岛模式下运行的微电网,其稳定性与可靠性要求各微电源能均衡分担负荷,电能质量要求系统输出的电压和系统频率波动在一定的范围内。而传统的微电网下垂控制适用条件有限,其电压和频率以及功率的分配受负荷投切、线路阻抗等多重因素的影响。分析了下垂控制工作原理和适用条件,提出了设计基于虚拟负电阻的改进型下垂控制策略,并通过MATLAB/SIMULINK工具箱对此进行了仿真验证分析,利用虚拟负电阻抵消线路部分阻性成分的影响,使得线路阻抗呈现感性,提高了微电网在负载投切下的功率分配精度。The stability and reliability of micro grid operating in island mode require all micro power sources to share the load evenly,and the power quality requires the output voltage and system frequency of the system to fluctuate within a certain range.However,due to the limited application condition,the voltage,frequency and power distribution of the traditional micro grid droop control will be affected by multiple factors such as load switching,line impedance,etc.With the analysis of the working principle and applicable conditions of droop control,this paper proposed the design of an improved droop control strategy based on virtual negative resistance,and utilized MATLAB/SIMULINK toolbox to carry out simulation verification and analysis.It also used the virtual negative resistance to counteract the influence of some resistive components of the line,so that the line impedance became inducive and the power distribution accuracy of the microgrid under load switching was improved.

关 键 词：微电网 下垂控制 虚拟负电阻 

分 类 号：TM743[电气工程—电力系统及自动化]