摘要
以EPRI-7节点系统为研究对象,负荷模型采用50%恒阻抗并联50%感应电动机,利用PSASP软件,通过改变感应电动机定转子电抗、电阻、惯性时间常数等参数,分析感应电动机参数变化对电力系统小干扰稳定性的影响,并考虑了感应电动机处于不同运行状态时,系统阻尼比的变化。分析结果表明,感应电动机的转子电阻、定子电抗对电力系统的小干扰稳定性影响比较大;并且感应电动机运行在额定状态附近更有利于系统的小干扰稳定。
Taking a 7-node system as research object,with 50% constant reactance and 50% induction motor as the load model,the effect of variation of induction motor parameters on power system small signal stability are analyzed by changing the induction motor parameter such as the rotor reactance,rotor resistance,inertia time constant and so on with PSASP.And the mechanical characteristics are considered in small signal stability analysis.The results show that the rotor resistance and stator reactance have relatively larger impact on power system small signal stability.And it is more close to stable when the induction motor operates near the rated status.
出处
《电力学报》
2010年第2期131-134,145,共5页
Journal of Electric Power
基金
山西省自然科学基金项目(2007011051)
关键词
电力系统
小干扰稳定
感应电动机
机械特性
负荷模型
power system
small signal stability
induction motor
mechanical characteristic
load model
