气隙击穿电压大幅降低的气象条件

Meteorological Condition of Dramatic Decline of Air Gap Breakdown Voltage

为研究空气污染严重及雾霾频繁出现等新的大气条件下,空气间隙的放电特性,利用全自动放电监测系统对广州地区全年自然条件下空气间隙的击穿电压和大气条件(包括气温、气压、相对湿度、风速和辐射照度等)进行监测,通过数据分析研究新大气环境下空气间隙击穿电压大幅下降的气象条件。研究结果表明:击穿电压大幅降低主要出现在春季,其气象条件是高湿度(相对湿度>80%)、低风速和低辐射照度。雾霾天气符合空气间隙击穿电压大幅下降的气象条件,空气间隙击穿电压与雾霾天气的关联性、空气间隙击穿电压与空气质量指数及其污染物的组成与含量的关系值得进一步研究。

In order to study breakdown voltage characteristics of the air gap under a new atmospheric condition in which air pollution and fog-haze happen more and more frequently, we installed several automatic discharge monitoring systems in Guangzhou, the representative city of Pearl River Delta, to monitor breakdown voltage of the air gap and atmospheric parameters including temperature, atmospheric pressure, relative humidity, wind velocity, illumination, etc. Then, we studied the meteorological condition of dramatically declined breakdown voltage through data analysis. The research results show that dramatically declined breakdown voltage appears in spring frequently, and breakdown voltage will drop significantly in high humidity（especially when the relative humidity is higher than 80%）, low wind velocity and low illumination environment. Fog-haze is in line with the above meteorological conditions.