一种新的发电机失步保护方案

针对发电机失步保护所存在的问题，介绍了一种基于功角直接测量的预测失步的方法，并在此基础上提出了一套保护方案。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较为完善。目前，基于此方法的新型微机发电机失步及失步保护已在研制之中。

A NEW METHOD OF OUT OF STEP PROTECTION FOR GENERATOR

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 a algorithm to predict the varicty 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 digital simulaiton. 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 being developed.