励磁系统仿真模型校正技术研究

励磁控制系统作为同步发电机的重要组成部分,主要作用是向同步发电机的定子绕组提供一个可控的直流电流(电压),维持机端电压恒定,满足同步发电机的正常发电需要。通过发电机组控制系统模型,及时校正机组仿真模型,对异常响应进行预警排查,能够有效提高系统运行的稳定性。在MATLAB中搭建了一种以外部仿真机作为励磁调节器的单机无穷大系统仿真模型,模拟励磁系统PID主环异常以及电力系统稳定器(PSS)辅环异常时的输出,与理论值进行对比分析,能够及时确定故障原因和部位,实现故障维修。

Research on Calibration Technology of Excitation System Simulation Model

Excitation control system is an important part of the synchronous generator. Its main function is to provide a controllable DC current (voltage) to the stator winding of the synchronous generator to maintain the constant voltage of the terminal, which meets the needs of the synchronous generator. Through the genset control system model, the unit simulation model could be calibrated in time, and the abnormal response could be checked for early warning, so as to effectively improve the stability of the system operation. A simulation model of singlemachine infinity system with external simulator as excitation regulator was built in MATLAB. The model simulated the output of the excitation system when the PID main loop and the power system stabilizer (PSS) auxiliary loop were anomalous. The output was compared with the theoretical value. Through comparison, it is confirmed that the proposed model can determine the cause and location of the fault in time and thus help to repair the faults.