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.
The awareness concerning the grid connected Photovoltaic (PV) has become vital and a major concern nowadays. Islanding detection is one of the most dominant challenges for distributed generation system connected to the utility grid. In addition, islanding has not been a preferable option as it may pose safety hazard and may cause damage to power generation and power supply facilities as a result of unsynchronized re-closer. Therefore, the islanding detection techniques are needed to ensure safe and reliable system operation. One of the established islanding prevention methods is the Slip Mode Frequency Shift (SMS) islanding method, which has numerous advantages over the other techniques. This paper investigates the active islanding detection methods and specifically focused on the SMS islanding method. The results show that the SMS islanding method successfully detected an unintentional fault and managed to isolate the system within the prescribed time range.
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