Open AccessResearch on Pressure-based Detection Technology for Partial Overheat Insulation Defect of Oil-less Power Equipment
Author(s) -
Qijun Yu,
He Li,
Qing He,
Guozhi Zhang,
Zheliang Zhang,
Xiaoxing Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/632/4/042009
Subject(s) - overheating (electricity) , casing , materials science , environmental science , petroleum engineering , electrical engineering , engineering
Pressure monitoring technology is the current state monitoring research hotspot of oil-less power equipment. Aiming at the lack of pressure change characteristics caused by overheating insulation defect of oil-less power equipment, this paper studies the pressure change characteristics of 110kV oil-immersed power transformer under local overheating insulation defect. Overheating defect belongs to the low temperature overheating, temperature rise gradient is 50 °C . Analysis of the experimental results indicates that pressure change trends show exponential, in the initial stage, the pressure increased sharply, then it increased slowly, and finally it tended to be stable; the increase of pressure in 50 hours ranged from 1kPa to 3kPa, and the pressure increase was obvious, which indicated that the online monitoring of local overheating insulation defects of the casing could be achieved by pressure monitoring technology, and finally the casing pressure change law was analyzed theoretically.