功率传输中的分叉

Bifurcation in Power Transmission

以发电机带电动机模型为基础 ,对发电机电压动态和负荷端感应电动机动态相互作用进行了分析 ,揭示了与鞍结分叉和Hopf分叉现象所对应的 2种功率传输极限 ;同时分析了发电机励磁增益和负荷端无功补偿对上述功率传输极限的影响。结果表明 ,励磁增益的增大可同时增大 2种极限 ,而补偿的增大在增大与鞍结分叉所对应的极限时 ,减小了与Hopf分叉所对应的极限。

Based on generator-induction motor model,the interaction between the dynamics of generator voltage and the dynamics of induction motor is analyzed.The two kinds of bifurcation(SNB and HB)and their corresponding power transmission limits are introduced.The influences of exciter gain and var compensation are considered.Results imply that the increment of exciter-gain can increase both kinds of limit,while the increment of compensation only increases the limit corresponding to SNB,but decreases the limit corresponding to HB.