含多变流器的微电网建模与稳定性分析  

Modeling and Stability Analysis of Microgrid with Multiple Converters

作　　者：马添翼[1] 金新民[1] 黄杏[1] 

机构地区：[1]北京交通大学电气工程学院,北京市100044

出　　处：《电力系统自动化》2013年第6期12-17,共6页Automation of Electric Power Systems

摘　　要：传统电力系统稳定性分析主要针对发电机进行建模,而微电网的稳定性分析需基于变流器进行建模,这种本质的区别使微电网必须重新确立适用于其稳定性分析的模型。文中根据变流器的控制特性将其划分为电压源和电流源2种类型,采用状态空间法建立了基于多变流器微电网的小信号模型,并通过节点功率计算法计算了其自治系统表达式,采用计算自治系统根轨迹的方法得到了微电网中参数与稳定性的关系。通过对比微电网系统时域仿真结果与文中的稳定性分析结果,说明了所建立模型的正确性。The stability analysis of traditional power grid is based on generator;however,for the microgrid the stability analysis is based on converters.The difference requires that a new model for microgrid stability analysis should be constructed.The paper divides the converters into two types,i.e.voltage source and current source.The small-signal model of a microgrid is obtained through state space method.The autonomous system model of this microgrid is obtained by nodal power calculation,and the stability analysis is carried out based on this model.A time domain simulation model is constructed in MATLAB,and the stability analysis is validated by the simulation results.

关 键 词：微电网(微网) 电压源型变流器 电流源型变流器 下垂特性 PQ控制 小信号模型 稳定性 

分 类 号：TM743[电气工程—电力系统及自动化]