同步发电机实用参数分时段辨识研究

Identification of synchronous generator practical parameters based on time interval

同步发电机在动态过程的不同时段起主导的实用参数不同。对比研究同步发电机实用参数在励磁扰动故障下的轨迹灵敏度特性,给出不同参数在不同时段内的灵敏度大小的不同。提出一种分时段辨识策略,即先利用励磁扰动前、后的稳态数据辨识同步发电机的稳态参数,然后分别根据次暂态和暂态时段数据辨识次暂态和暂态参数,最后以单机无穷大系统为例验证此方法的有效性。

The leading practical parameters of synchronous generators are different at different time stages in the dynamic process.At first,the traj ectory sensitivity features of synchronous generator practical parameters were analyzed by the excitation disturbance analysis method and it indicated that different parameters of synchronous generators had different traj ectory sensitivity features according to time intervals.And a time interval based identification strategy of synchro-nous generator parameters was proposed in this paper.With steady-state data before and after the disturbance,the steady-state parameters of synchronous generator can be identified.Then,with the subtransient-state data and transient-state data,the subtransient parameters and transient pa-rameters can be identified respectively.Finally,by a single machine infinite bus system,the ef-fectiveness of above method was verified.