励磁系统参数对发电机组力矩特性的影响

Influence of Excitation System Parameters on Moment Characteristics of Generator Set

为分析励磁系统参数对柴油发电机组力矩特性的影响,采用偏差化和线性化的方法,推导了柴油发电机组动态线性化方程,得到了体现其性能的同步力矩和阻尼力矩表达式,分析了同步力矩和阻尼力矩与线性化方程各参数以及励磁系统参数之间的关系,并结合具体发电机组参数,进行了仿真实验。仿真结果表明:感性负载较强时,励磁系统参数对同步力矩影响较大;稳态运行时,励磁系统参数对阻尼力矩影响较大。

In order to analyze the influences of the excitation system parameters on the moment characteristics of a diesel generator set, with the deviation and linearization method, a dynamic linearization equation of the diesel generator set was deducted.The expressions of the synchronizing torque and damping torque were established. The relation among parameters of the torque linearization equation and parameters of the excitation system was analyzed. The simulation results of the concrete generator set show that when the inductive load grows, the influence of parameters of the excitation system on the synchronizing torque is bigger, but in the steady state the influence of parameters of the excitation system on the damping torque is bigger.