In order to analyze the influence of the typical vegetation ashes/particles on the discharge characteristics of conductor-plane air gap,in this paper experimental studies were conducted on the AC breakdown characteristics of gap under typical vegetation ashes/particles of thatch,straw and fir branch condition by using forest fire simulation test platform.In order to analyze the influence mechanism of multiple particles on the breakdown characteristics,the simulation model was built.The results show that the existence of the ashes and particles lead to a great decline of the dielectric strength of the air gap under AC voltage,which is reduced to about 54% of the pure air gap under standard atmosphere,the impact of ashes/particles of thatch on the AC breakdown characteristics of gap is greater than other vegetation;the existence of particles make the electric field distribution between conductor and plane become uneven,the maximum electric field strength near the elongated particle is about 10.2 times larger than that of the backgroundelectric field,and the maximum electric field strength of the gap increases by about 55.7% when the length of the elongated particle is changed from 15 mm to 25 mm;the closer the particle is from the simulation conductor and the larger the relative dielectric constant of particles,the greater degree of electric field distortion.
龙明洋, 黄道春, 黎鹏, 阮江军, 李豫. 典型植被灰烬颗粒对导线-板间隙放电特性的影响[J]. 电工技术学报, 2018, 33(3): 627-633.
Long Mingyang, Huang Daochun, Li Peng, Ruan Jiangjun, Li Yu. Influence of the Typical Vegetation Ashes/Particles on the Discharge Characteristics of Conductor-Plane Air Gap. Transactions of China Electrotechnical Society, 2018, 33(3): 627-633.
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2018, Vol. 33 
