Analysis of HVDC breakdown characteristic of LLDPE-natural rubber added with biofiller as high voltage insulating material

Abstract

<span>The influence of solid insulation has been investigated by few researchers. The mechanism of solid breakdown is important in insulation studies. </span><span>In this research, testing on Linear-Low Density Polythylene (LLDPE) with Natural Rubber (NR) and different weight concentration of biofiller are conducted under High Voltage Direct Voltage (HVDC) by using needle and sphere types of electrode arrangements. Oil Palm Empty Fruit Bunch (OPEFB) and Pineapple Leaf Fiber (PALF) are the biofillers used for the sample</span><span>s</span><span> development. </span><span>The </span><span>LLDPE-NR samples consists of</span><span>different weight percentages of biofiller which are 0%, 2.5%. 5.0%. 7.5% and 10% </span><span>with 3mm thickness. The voltage has been increased until the breakdown occurs. Based on the results obtained, OPEFB and PALF with the highest weight percentages of 10% showed the highest damage voltages of 59.09kV and 59.36kV. It has been proven that both samples with the highest filler content have appropriate insulating properties. In conclusion, the addition of biofiber to LLDPE-NR has improved the breakdown properties compared to pure LLDPE.</span>

Power flow analysis of DC distribution system in a ship with non-electric propulsion

“…The application of HVDC transmission system is thought to be more advantageous than the medium voltage DC (MVDC) or low voltage DC (LVDC) distribution system because HVDC transmission has considerably longer cables, resulting in higher total impedance. Thus, it is more significant to decrease the impedance by reconfigure HVAC to HVDC transmission system compared to reconfigure MVAC or LVAC to MVDC or LVDC distribution systems [16]- [19]. Greater reduction of impedance will lead to greater reduction of power loss and voltage drop which is preferable.…”