电工技术学报  2016, Vol. 31 Issue (增刊2): 131-141    DOI:
电力系统及其自动化 |
负载突变情况下直流微网的分岔现象及分析
肖百惠,戴栋,张波,韩永霞
华南理工大学电力学院 广州 510641
Bifurcation and Its Analysis of DC Micro-Grid under Abrupt Load Change
Xiao Baihui ,Dai Dong, Zhang Bo ,Han Yongxia
School of Electric Power South China University of China Guangzhou 510641 China
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摘要 本地负荷突变是电力系统中常见的现象,当大电网无法给予完全支撑时直流微网的母线电压会出现崩溃现象,影响大电网电压和频率稳定,导致严重的后果。基于上述情况,在Matlab/Simulink中建立了包含光伏、储能和大电网在内的并网型直流微网模型,从能量流的角度介绍了直流微网运行的4种工作模式,研究了负荷突变时出现的系统失稳现象,探讨了直流微网系统稳定性与工作模式以及能量流的关系,从理论分析和仿真两方面研究了直流微网系统失稳的机理,并得到了给定条件下系统的稳定边界,为直流微网的设计提供了参考。
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肖百惠
戴栋
张波
韩永霞
关键词 直流微网负载突变失稳工作模式机理稳定边界    
Abstract:Abrupt load change is a common phenomenon of power system.When it occurs,the bus voltage of DC micro-grid may collapse if the power system cannot fully support such abrupt change.Consequently,the stability of both voltage and frequency of the power system will be influenced.In this paper,a grid-connected DC micro-grid model including photovoltaic battery,energy storage and the large power grid is established in Matlab/Simulink.From the view point of power flow,four operating modes of DC micro-grid are introduced.The phenomena regarding instability is presented when the load is abruptly changed.The relationship between instability of DC micro-grid and power flow,as well as the operating modes,is investigated.The mechanism on stability loss of the DC micro-grid system is studied from both theoretical and numerical ways,and the corresponding stability boundary is also given.The results of this paper will provide a reference to the design of the DC micro-grid.
Key wordsDC micro-grid    abrupt load change    instability    operating modes    mechanism    stability boundary   
收稿日期: 2016-08-20      出版日期: 2017-03-23
PACS: TM712  
基金资助:国家自然科学基金资助项目(51377061)。
作者简介: 肖百惠 女,1994年生,硕士研究生,研究方向为直流微网不稳定能量流及其控制。E-mail:453486435@qq.com(通信作者)戴 栋 男,1976年生,教授,博士生导师,研究方向为电力设备在线监测、气体放电、多场耦合计算方法及其应用、直流微网建模与能量流控制。E-mail:ddai@scut.edu.cn
引用本文:   
肖百惠,戴栋,张波,韩永霞. 负载突变情况下直流微网的分岔现象及分析[J]. 电工技术学报, 2016, 31(增刊2): 131-141. Xiao Baihui ,Dai Dong, Zhang Bo ,Han Yongxia. Bifurcation and Its Analysis of DC Micro-Grid under Abrupt Load Change. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 131-141.
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