摘要
为了研究开关柜中局部放电产生的电磁波特性分布,基于有限元差分法理论,利用三维全波电磁仿真软件XFDTD对最易发生故障的电缆室进行仿真分析。分析结果表明局部放电引起的电磁波以球面波的形式向四周传播,由电磁波感应生成的电场强度在柜门缝隙处最强,呈现出衰减振荡的波形,同时检测的感应电压与电场强度波形相似,考虑到实际传感器的差异性,提出感应电压的归一化处理,通过多点检测有效地实现了局部放电的定位。
In order to study on the distribution of electromagnetic wave characteristics generated by partial discharge(PD)in the switchgear,based on the finite element difference theory,the three-dimensional full-wave electromagnetic simulation software XFDTD was used to simulate the most trouble-prone cable room.The analysis results show that the electromagnetic wave caused by PD is propagating in the form of spherical wave.The electric field intensity induced by electromagnetic wave is the strongest at the gap of the cabinet door,showing the waveform of damped oscillation.At the same time,the detected induced voltage is similar to the electric field intensity waveform.Considering the difference of the actual sensors,this paper proposes the normalization process of the induced voltage,effectively realizing the location of PD with multipoint detection.
作者
霍天
HUO Tian(State Grid Beijing Electric Power Company Maintenance Branch,Beijing 100071,China)
出处
《电工电气》
2019年第12期22-27,58,共7页
Electrotechnics Electric
关键词
开关柜
局部放电
时域有限差分法
归一化
电磁波
感应电压
switchgear
partial discharge
finite difference time domain method
normalization
electromagnetic wave
induced voltage
