含有UL-P型转子低压失磁继电器失磁保护框图的优化  

Optimization of loss of field protection diagram based on U_L-P

作　　者：田丰[1] 李碧辉[1] 王伟 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]许继日立公司,河南许昌461000

出　　处：《电力系统保护与控制》2008年第12期49-51,68,共4页Power System Protection and Control

摘　　要：整定值自动随有功功率P变化的转子低压失磁继电器(简称为UL-P型继电器)广泛应用于失磁保护,国内各大继电器厂都生产含有UL-P继电器的失磁保护装置。但在一些工程和文章中有少数失磁保护框图不妥或错误,该文从理论上分析并予以优化,提出新的保护框图方案,避免静稳边界后发电机异步运行时由于UL-P发生抖动而引起保护出口抖动,保证失磁保护出口能持续性地动作,对失磁保护有一定的指导意义。With setting automatic tuning of the changes in active power,rotor low-voltage loss of excitation relay（UL-P-type relays） has been applied to loss of field protection,which has still a small number of deficiency or wrong in some works or papers.This paper analyzes theoretically and optimizes the protection diagram.A new diagram of the protection is proposed to avoid protection exports jitter caused by UL-P protection exports jitter after static and stability boundary,and ensure the protection exports keep action.It is useful for under excitation loss of field protection.

关 键 词：发电机 失磁保护 转子低电压 

分 类 号：TM581[电气工程—电器]