二次消谐装置测试系统研究

Research on Test System of Secondary Harmonic Elimination Device

电磁式电压互感器在电网监测系统中是相当重要的设备。由于PT铁磁电感的饱和引发铁磁谐振从而产生长时间的过电压是电力系统中较为常见的一类问题。文中分析了电力系统中电磁式电压互感器铁磁谐振过电压产生的机理,并针对发生较频繁的PT谐振现象,设计了一种新型二次消谐装置的测试系统。该装置通过专业检测机构检测,证明该消谐装置动作可靠,性能良好,达到了消谐的目的。

Electromagnetic voltage transformer is a very important equipment in power network monitoring system.Due to the saturation of PT ferromagnetic inductance,the ferroresonance and long overvoltage are common problems in power system.In this paper,the mechanism of ferroresonance overvoltage of electromagnetic voltage transformer in power system was analyzed,and a new test system of secondary harmonic elimination device was designed for the frequent PT resonance phenomenon.The device had been tested by professional testing institutions,which proved that the harmonic eliminating device had reliable action and good performance,and achieved the purpose of harmonic eliminating.