大型发电机组失步预测及保护综述

对发电机失步预测及保护不同设计思想进行了综述和评价，根据实现的原理将装置分为间接反映功角、直接测量功角或转速和基于能量原理的失步预测。介绍了不同原理在实际应用中的优缺点，总结了在设计发电机失步预测装置时应注意的问题和失步预测及保护的发展方向。

OVERVIEW OF GENERATOR OUT_OF_STEP PREDICTION AND PROTECTION

This paper summarizes and evaluates various schemes on generator out_of_step prediction and protection. According to the theories used in the devices, these schemes can be divided into three types: schemes reflecting the generator angle indirectly, schemes based on measuring the generator angle or angular_velocity and schemes based on the energy principle. The advantage and disadvantage of the schemes in application are also pointed out. At last, some suggestions on designing the out_of_step relay are presented.