Monitoring the electrical properties and modified insulation of enhancing xlpe high voltage cables

Abstract

Electrical treeing is the dominating failure phenomena in solidinsulating material. Treeing occurs due to voids, dust and impurities presentin the insulation material , change in the crystalline structure, stress occurringin the semi-crystalline structure and environmental factors. The growthcharacteristics of electrical tree is analyzed by injecting high voltage newlinecontinuously using transformer in XLPE sample. In this work, the inceptionand propagation of the tree is monitored at regular interval of time. The lengthof the tree, the partial discharge and leakage current at the time of propagationof the tree is also monitored newlineThe structure of electrical tree is clear in sub-microscope. Theexperiment is carried out by adding some nanoparticle to XLPE. Thenanoparticle used is magnesium oxide (MgO). The insulation property ofXLPE is analyzed by increasing the concentration of the nanoparticle. Thispaper presents the experiments and analysis of the electrical tree growingcharacteristics and improvement of insulation property of XLPE by additionof nanoparticles.The resultant method can be used to enhance the monitoring ofelectrical properties and improve the insulation property of XLPE highvoltage cable. I2C Protocol is applied to monitor the any voltage stress inXLPE cable. The nano-particles MgO 1%, MgO 3% were added to improvethe insulation property of XLPE. Partial Discharge Pattern, electrical tree andcurrent leakage has been detected using nano-particle MgO 1%, and MgO 3%with XLPE cable insulation. The experimental results of XLPE Virgin,XLPE+MgO 1%, and XLPE+MgO 3% were analyzed and compared usingpartial discharge kit, system, sensor, scanning electron microscope andStream Essential Olyumpus software. newline newline