基于微机的失磁保护装置  

Microcomputer-Based Loss of Excitation Protection

作　　者：夏华阳[1] 周太康[1] 

机构地区：[1]华中理工大学电力工程系

出　　处：《华中理工大学学报》1989年第6期93-96,共4页Journal of Huazhong University of Science and Technology

摘　　要：基于微型计算机的失磁保护装置因其主体是计算机,所以具有很强的计算功能及记忆功能,这些特点使得保护装置可以较高精度地实现复杂的保护特性.本文所述装置的硬件由单板机及扩展的一些外部装置组成,外部装置包括数据采集系统及打印机、开关控制设备等.软件由调试和运行两大部分组成,实现了单个单板机既能作开发工具,也能作运行主机的目的.This paper described the loss of excitation protection relaying based on a microcomputer for large synchronous generator.By mapping the critical loss-of-synchronous curve in R-X plane onto Z-θ plane,the accuracy of sectionalized linearization is improved. According to the theory that the phase difference between the fundamental components of the original signals U and J should be equal to the phase difference between the cosine/sine components obtained through Fourier analysis, a new method, the 'variable interval method', for computing the phase angle of impedance is developed.

关 键 词：微机 失磁 保护装置 发电机 

分 类 号：TM310.73[电气工程—电机]