分布式控制的直流微电网系统级稳定性分析  

System-level Stability Analysis of DC Microgrid With Distributed Control Strategy

作　　者：支娜[1] 张辉[1] 肖曦[2] 杨甲甲[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西省西安市710048 [2]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084

出　　处：《中国电机工程学报》2016年第2期368-378,共11页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51277150;51307140);陕西省工业攻关项目(2013K07-05);陕西省教育厅产业化培育项目(14JF020);陕西省重点学科建设专项资金(105-7075X1301)~~

摘　　要：直流微电网以其可控性强和可靠性高等优点成为未来家庭和楼宇的主要供电架构,其系统级的稳定性研究是直流供电系统设计中的重要问题。通过建立直流微电网分布式控制策略下的统一数学模型,利用李雅普诺夫直接法研究直流微电网大信号稳定性的参数边界条件;通过分析电流小扰动对母线电压的影响,提出并联阻抗稳定性判定方法,为直流微电网系统级设计提供重要的参考依据。仿真结果表明,所提稳定性判定方法能够对直流微电网的稳定性进行判定。DC microgrid will be the main power supply system for the future sustainable homes and buildings due to their high controllability, reliability, and system-level stability which are important to the design of the DC power supply system. In this paper, the common mathematic model of DC microgrid under the distributed control strategy was built, and based on this model, large signal stability was studied which Lyapunov＇s direct method, the parameter boundary conditions of DC microgrid were estimated. Based on the analysis of the influence of small disturbance on bus voltage, a stability test method of parallel impedance in DC microgrid was proposed. It provided an important reference for the DC microgrid system-level design. The simulation results show that the stability of the DC microgrid can be tested by the proposed method.

关 键 词：直流微电网 分布式控制 数学建模 系统级稳定性 

分 类 号：TM71[电气工程—电力系统及自动化]