Generator parameters are the important basis for the power system simulation. Accurate generator parameters should be obtained to improve the grid operation safety and stability. The principle of load rejection method was introduced. The generator transient process under load rejection condition was theoretically analyzed. Based on time-domain simulation technology and load rejection method, a novel method to identify synchronous generator parameters was proposed. Field tests were conducted by using the proposed load rejection method; and the experimental results were analyzed. The time-domain generator simulating models were established according to the field experimental conditions. By comparing the results of simulations and experiments, generator parameters can be identified. Hie comparison results also show that the identified parameters are more accurate, which validates the effectiveness of proposed method.%获取准确的发电机参数是提高电力系统仿真计算准确性的重要依据,有利于电网的安全稳定运行.应用抛载法对发电机的抛载过渡过程进行理论分析,基于时域仿真抛载法提出同步发电机参数的辨识方法.利用抛载法进行发电机现场试验,获得发电机空载、灭磁和dlq轴抛载试验数据并进行分析处理.模拟现场试验工况建立发电机空载、灭磁及dlq轴抛载的时域仿真模型,将仿真结果与试验结果进行对比分析,辨识得到全套发电机参数.为验正提出参数辨识方法的有效性,建立发电机异步自励磁仿真模型并利用辨识参数与原厂提供参数进行异步自励磁工况仿真,将仿真结果与试验波形进行对比,表明辨识参数具有更高的准确性.
展开▼
