摘要
气体放电管是电力、电子系统中常用的雷电浪涌防护器件,其浪涌冲击特性直接影响防护效果。利用EMTP软件建立气体放电管仿真电路模型,搭建1.2/50-8/20μs组合波发生回路进行仿真冲击,并将结果与试验数据进行对比。此外还搭建10/700-5/320μs组合波发生回路,比较分析不同浪涌脉冲作用下气体放电管的冲击放电电压和波形上升时间变化。分析结果表明:建立的气体放电管电路模型冲击放电电压和通流波形均与试验结果相接近,较好地反映了其在组合波冲击下的响应特性;气体放电管的响应受冲击电压变化率的影响较大,冲击放电电压随着冲击电压变化率的增大而增加;冲击放电电压波形上升时间则相反。气体放电管对不同雷电浪涌冲击波形的响应特性有所不同,需要在应用中更加针对性地进行分析和防护。
Gas discharge tube （GDT） is commonly used to suppress lightning surge in electric power system and electronic system, lightning surge characteristic of GDT will directly affect its transient suppression performance. Simulation Model of GDT is established by EMTP Software. A 1.2/50-8/20 μs combined wave generation loop is used to simulate the impact, and the results are compared with the experimental data. In addition, a 10 / 700-5 / 320 μs combined wave generation loop is built to compare the impulse discharge voltage and waveform rise time of the gas discharge tube under different surge pulses. The results show that the impact discharge voltage and the flow waveform of the gas discharge tube circuit model are close to the experimental results, which reflect the response characteristics under the impact of the combined wave. The response of the gas discharge tube is affected by the impact voltage change rate. The impact discharge voltage increases with the increase of the impact voltage change rate; the impulse discharge voltage waveform rise time is the opposite. The response characteristics of the gas discharge tube to different lightning surge shock waveforms are different and need to be analyzed and protected more in the application.
出处
《电瓷避雷器》
CAS
北大核心
2017年第4期94-97,共4页
Insulators and Surge Arresters
关键词
气体放电管
浪涌
组合波
冲击特性
gas discharge tube
surge
combined wave
impact characteristic
