配电系统PT高压熔断器熔断的原因分析  

Cause Analysis of PT High-voltage Fuse Blow in Power Distribution System

作　　者：周小梅[1] 杨以涵[1] 谭伟璞[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《现代电力》2007年第4期34-37,共4页Modern Electric Power

摘　　要：为了对配电系统PT高压熔断器熔断的原因有更深入的研究,通过大量的物理模拟实验,发现了PT高压熔断器熔断主要原因不是由铁磁谐振产生的过电压引起的,而是由系统三相对地电容在接地过程中的充放电引起的。并利用MATLAB数字仿真进行了验证,更进一步揭示了PT高压熔断器熔断的本质。在PT高压熔断器熔断理论方面有了重大突破。In order to study the cause of PT high voltage fuse blow thoroughly in the electrical power distribution system, massive physical analogue experiments are tested. It is concluded that the primary cause of the PT high voltage fuse blow is not the over-voltage produced by the ferromagnetic resonance, but is the charging and discharging of system three-phase earth capacitance in process of connecting the earth. The MATLAB numeral simulation is employed to further investigate the essence of PT high voltage fuse blow.

关 键 词：PT高压熔断器 熔断 铁磁谐振 

分 类 号：TM771[电气工程—电力系统及自动化]