摘要
阐述了在三相电网内,由于接线的复杂性以及故障和操作形式的多样性,所形成的铁磁谐振回路千差万别;在某些接线条件下,会比较经常地产生铁磁谐振过电压现象。分析了电网中电磁式电压互感器引起的铁磁谐振过电压现象、表现形式和危害性。针对福建省莆田供电区电网的特点并结合调度运行经验,提出了消除运行中出现的铁磁谐振过电压的几个方法。
The iron-magnet resonancereturncircuits are in great variety owning to the complexity of wiringand the diversityof faultand operatingform withinthe three-phaseelectricnetwork.The iron-magnet resonance overvoltage happens frequentlyunder certainterminalconditions.The phenomenon of the iron-magnet resonanceresultedfrom the electromagneticpotential transformeris analyzed principally,and the manifestation and perniciousness of theiron-magnetresonanceare demonstrated.In connectionwith the char-acteristics of the Putianelectric network and by combination with the operatingexperience, some methods to dispel the iron-magnet resonanceovervoltage arepresented.
关键词
电网
铁磁谐振过电压
基波谐振过电压
高次谐波谐振过电压
electricnetwork
iron-magnetresonance overvoltage
fundamentalwave resonanceovervoltage
higher harmonicwave resonanceovervoltage
fractionalharmonicwave resonanceovervoltage
