机组轴系扭振响应快速仿真算法初探

Study of Quick Simulation on T-G Shaft Vibration

汽轮发电机组轴系扭振研究中的一个重要方面是仿真计算。扭振仿真程序规模一般较大。在轴系采用精确模型分析时,计算时间则更长。在多机大系统的轴系扭振研究中,矛盾将更为突出。影响仿真速度的主要因素有两个:一是同步发电机的Park方程为变系数微分方程,每积分一步需求一次逆;二是轴系运动方程阶次高,当轴系分为m段时将形成2m阶矩阵微分方程,且求逆后会大大地改变矩阵的稀疏度。本文提出的方法可较好地解决上述矛盾。

A quick and strict simulation algorithm dealing with the Park's equation and high order shaft system model is presented. The computation of some example systems shows that it is very effective. The application of this method to the analysis of shaft system oscillation in multimachine large system is promising.