简单系统中感应电动机群稳态运行状态的分析  

Steady Operation State Analysis of an Induction Motor Group in a Simple Power System

作　　者：吴浩[1] 郭瑞鹏[1] 韩祯祥[1] 曹一家[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2011年第12期1-6,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50707029);国家重点基础研究发展计划(973计划)资助项目(2004CB217900)~~

摘　　要：基于感应电动机的T形等值电路,分析了单台电动机稳态运行状态的分岔情况,发现了分岔点的滑差仅依赖于电动机及其负载的参数,而分岔点电压还与初始状态有关;研究了感应电动机初始滑差与运行指标的关系,获得了初始滑差的合理分布范围。以单负荷无穷大系统为研究对象,提出了感应电动机群稳态运行状态的分析方法;在初始滑差呈等差数列、初始功率相等的条件下,分析了感应电动机群稳态运行状态与系统运行条件、电动机堵转台数等的关系。最后,建立了所得分析结果与感应电动机群及单台电动机在一定随机条件下期望值的联系,结果表明,初始滑差呈等差数列、初始功率相等的电动机群的确定性分析结果是随机条件下相应结果期望值的近似。Based on T-type equivalent circuit,the bifurcation of single induction motor at steady operation state is analyzed and it is found that motor slip at bifurcation point depends on the parameters of motor and its load only,while voltage at bifurcation point further depends on the initial state.By studying the relationship between motor initial slip and motor operation indexes,the rational distribution range of initial slip is derived.Taking the single load and infinite bus system as the studying object,the analysis method for steady operation state of induction motor group is proposed.Under the condition of arithmetic series distributed initial slip and equal initial motor power,the steady operation states of induction motor group are calculated.Their relationships with system operation condition and stalled motor number are studied.Finally,the relation of these analyzed results with the expected steady states of induction motor group or single induction motor under certain stochastic condition are studied.The studied results show that the arithmetic series distributed initial slip and equal initial power approximate both the results of motor group with uniform distributed initial slip and uniform dispatched initial power,and the results of single motor with uniform distributed initial slip.

关 键 词：感应电动机 稳态运行状态 连锁堵转 负荷模型 

分 类 号：TM346[电气工程—电机]