基于功角直接测量及预测的发电机失步预测保护

摘要

In order to avoid the problems caused by traditional predictive out of step protection, this paper presents a method to measure the power-angle directly and bring forward an algorithm to predict the variety of power-angle. Based on these, a complete microprocessor-based predictive out-of-step protection scheme is put forward.The accuracy of the algorithm and the analysis of the error is simulated by using digital simulation. The result shows that the method is more accurate and simpler than those traditional methods. Its clear concept and high accuracy will do good to the predictive out of step protection. Now, the new predictive out of step protection is under developing.%针对发电机失步预测保护所存在的问题，介绍了一种基于功角直接测量的自回归预测失步的方法，并在此基础上提出了一套完整的保护方案。通过对算法的精度和误差进行了数字仿真分析，表明这种方案的精度较高。基于此方法实现的大型发电机失步及失步预测保护与传统的保护相比，物理概念明确，对失步的预测及判别更加完善。目前，基于此方法的新型微机发电机失步及失步预测保护已在研制之中。