期刊
IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING
卷 12, 期 4, 页码 484-490出版社
WILEY
DOI: 10.1002/tee.22403
关键词
flow state; insulating oil; charged metal particle; traction force; electric force; trajectory
资金
- National Natural Science Foundation of China [51377181]
Problems due to discharge by charged metal particles in insulating oil under flow state are examined in this study. The motion characteristics of a charged metal particle in a horizontal transformer oil tract are investigated, and a mechanical model of a charged metal particle under flowing oil and an AC field is proposed. The particle's equations of motion are numerically solved using the fourth-order Runge-Kutta computational algorithm. The trajectory of a spherical iron particle in typical motion state under flowing oil and AC field is simulated. The influence on the motion characteristics of a charged metal particle in terms of the oil flow rate, electric field strength of the oil tract, particle scale, initial state, and particle rotation is analyzed. Results reveal that when a charged metal particle is moving fast along the direction of oil tract flow, reciprocating oscillation simultaneously occurs in the vertical direction. Its trajectory is significantly affected by the oil flow rate, the electric field strength of the oil tract, particle scale, initial state, and particle rotation. Moreover, the degree of oscillation of the charged metal particle may be the main cause of degradation of the insulating oil under flow state. (c) 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
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