Open AccessInfluence of Pollution Degree on Impact Flashover Characteristics of Insulator
Author(s) -
Yafeng Chao,
Liu Zhang,
Cheng Wang,
Fuyong Huang,
Jianjia Duan,
Yishi Yue,
Sanwei Liu
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/358/5/052074
Subject(s) - waveform , voltage , arc flash , impulse (physics) , electrical engineering , insulator (electricity) , materials science , composite material , physics , engineering , quantum mechanics
The flashover characteristics of polluted insulators under lightning impulse and switching impulse are simulated in laboratory. It is found that when the gray density value is fixed, the flashover voltage begins to saturate under the shielding failure voltage while the salt density value reaches 0.1∼0.15mg/cm 2 And the salt density saturation point under the counterattack voltage waveform is earlier than that under the counterattack voltage waveform, around 0.02mg/cm 2 . When the gray density value is fixed, under the counterattack voltage waveform, the flashover voltage decreases slightly in the gray density of 0.05mg/cm 2 to 0.10 mg/cm 2 range, and the flashover voltage begins to rise with the increase of gray density. Under the shielding failure waveform, the flashover voltage always decreases in the gray density of 0.05mg/cm 2 to 0.20mg/cm 2 range, and begins to rise gradually after the gray density exceeds 0.20mg/cm 2 .