金属氧化物避雷器的残压检测模型

Residual Voltage Detection Model of Metal Oxide Surge Arrester

为了延缓金属氧化物避雷器(MOSA)阀片的寿命,保障电力系统安全稳定运行,提出了基于残压检测的避雷器诊断方法。将MOSA在冲击电流作用下产生的残压信号作为研究对象,建立MOSA残压检测模型;利用有限元法(FEM)得到残压检测结构参数,证明了该检测模型不会对MOSA产生不良影响。对模型进行工频稳态数值仿真,结果表明所提出的MOSA残压检测模型不仅可以降低MOSA本体的最大场强,还可以降低MOSA的工频损耗,延缓结构老化,降低设备的事故率。

This paper proposed a residual voltage detection method for MOSA to slow down the service life of the MOSA valve plate and ensure the safe and stable operation of the power system.It took the residual voltage signal generated by MOSA under the action of impulse current as the research object and established the residual voltage detection model of MOSA.Moreover,it employed FEM to obtain the structure parameters of residual voltage detection and proved the detection model would not have adverse effects on MOSA.This research used this model to do the simulation experiment of power frequency steady-state numerical value.The results show that the proposed residual voltage detection model could help reduce the maximum electric field strength,decrease the power frequency loss,delay the aging of the structure,and lower the accident rate of the equipment.