Experimental Investigation of Electrical and Rheological Properties of Modified Punga Oil

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 30; no. 4; p. 1
• Main Authors: Murugesan, Srinivasan, Raj, Raymon Antony, Sarathi, R., Amizhtan, S. K.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Corona; Corona inception voltage; Discharges (electric); Dissipation factor; Electric potential; Emission analysis; Emissions control; Esterification; Excitation; Fatty acids; Fluorescence; fluorescence spectroscopy; frequency sweep; Loss modulus; Oils; Optical emission spectroscopy; Optical fiber amplifiers; Optical fiber sensors; Optical fiber testing; Polarity; Rheological properties; Rheology; Shear rate; Shear stress; streaming current; Voltage; Weibull distribution
• ISSN: 1070-9878; 1558-4135
• DOI: 10.1109/TDEI.2023.3262618

The experimental research of modified punga oil (MPO) under electrical and rheological considerations is presented in this paper. Since MPO reacts strongly to the white fluorescent fiber, it is utilized to test the corona inception voltage (CIV). According to the Excitation- Emission Matrix (EEM) of MPO, the elimination of unsaturated free fatty acids has dramatically reduced the emission and excitation wavelengths less than 450 nm and 600 nm, respectively. The largest influence on the CIV response without the magnetic field of MPO is exerted by the negative DC polarity, followed by the positive DC and AC voltage. The Optical Emission Spectroscopy (OES) of the fluorescent white fiber has a remarkable sensitivity at AC frequencies below 30 MHz. The MPO is said to exhibit a greater breakdown strength of 45 kV under negative polarity lightning impulse voltage than under positive voltage of 38 kV. The effectiveness of the MPO is used to support the Weibull distribution's normality domains. The dielectric dissipation factor of MPO is intensely reduced by the esterification of PO, falling from 3.5 at 30°C to 3.0 at 90°C. As a result, in terms of temperature and speed, the amount of streaming current flowing in the MPO is decreased by a factor of 6. The change in shear stress with shear rate shows a power law link, as well Newtonian behavior for MPO and PO. A noticeable loss modulus during frequency sweep measurement for the MPO points to its exceptional rheological nature.