一种微机型过励磁保护的研究

对现有几种微机型反时限过励磁保护的动作特性曲线和算法进行分析，分析结果表明分段原理动作特性曲线可以与设备过励磁曲线较好地配合，基于反时限保护动作状态与动作量基本关系的算法能够较好地反映设备过励磁的动态过程。并且介绍了由以上两者形成的反时限过励磁保护方案的实现方法。最后，基于该方案构成了一种适合于大型发电机、变压器的通用型过励磁保护，对保护在应用中应注意的一些问题也进行了分析。该过励磁保护在大型水轮发电机组的运行结果表明，保护能够满足发电机、变压器运行的需要。

Study of a microcomputer-based over-excitation protection

In the paper,the comparative analysis on performance of several microcomputer inverse-time over-excitation protection's operating characteristic curves and algorithms are done,the analysis results show that the segmental fitting operating characteristic curve could match equipment's over-excitation curve better,the algorithm based on the inverse-time protection basic relation between operation state and action value could reflect the dynamic process of equipment over-excitation condition more effectively.Th...