The performance of polymeric insulation will be distorted by the accumulation of space charge. This will lead to local electric field enhancement within the insulation material that can cause degradation and electrical breakdown. The introduction of nanofillers in the insulation material is expected to reduce the space charge effect. However, there is a need to analyze potential nanofillers to determine the best option. Therefore, the objective of this research work is to examine two types of nanofillers for Cross-Linked Polyethylene (XLPE); Zinc Oxide (ZnO) and Acrylic (PA40). The effects of these nanofillers were measured using the Pulsed-Electro Acoustic (PEA) method. The development of space charge is observed at three different DC voltage levels in room temperature. The results show that hetero charge distribution is dominant in pure XLPE materials. The use of both nanofiller types have significant effect in decreasing the space charge accumulation. With nanofillers, the charge profile changed to homo-charge distribution, suppressing the space charge formation. Comparison between both the nanofillers show that PA40 has better suppression performance than ZnO.
The inefficiency of the existing electricity transmission system has led to supply interruption to the grid system. The unscheduled supply interruption is triggered by several reasons which draw attention to the connection of micro generation especially to Low Voltage (LV) network. Malaysia requires an extensive research in order to implement a new and feasible grid named MG. According to the IEEE 1547.4, the vital issue in the MG is active power. To investigate the MG operation, the MG modelling was established to cope with this problem. These model tested five cases of transition modes between grid and MG based on IEEE Standard 1547.4 and TNB Guidelines were simulated using Matlab/Simulink. Each case was analysed based on the switching time on power systems and fault insertion to show the transition in terms of active power between both power systems and operation modes.
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