Title :
Dielectric fluids in motion
Author :
Nelson, J. Keith
Author_Institution :
Dept. of Electr. Power Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
The behavior of transformer oil and other dielectric fluids used for the cooling and insulation of power system equipment is significantly influenced by motion enforced by the action of circulating pumps. Two important factors impact the situation. First, charges generated by streaming electrification in critical parts of the hydraulic circuit having high velocity and/or turbulence can accumulate to distort the electric field in positions where dielectric integrity is prejudiced. However, the dielectric strength of the fluid is also altered per se by the actions of the flow in a complex, but predictable, manner. Both of these aspects need to be understood to permit informed design, operation and monitoring of forced-cooled equipment.<>
Keywords :
electric breakdown of liquids; electric charge; electric fields; electric strength; electrohydrodynamics; insulating oils; power transformers; transformer insulation; triboelectricity; circulating pump action; cooling; dielectric fluids; dielectric strength; electric field; forced-cooled equipment; hydraulic circuit; insulation; power system equipment; streaming electrification; transformer oil; Dielectric liquids; Dielectrics and electrical insulation; Electrical equipment industry; Manufacturing industries; Oil insulation; Petroleum industry; Power engineering and energy; Power transformer insulation; Solids; Stress;
Journal_Title :
Electrical Insulation Magazine, IEEE
