This paper studies the influence of the load type on the fault performance of the standalone Micro Grid
(MG). Different load types (static and dynamic) are considered to show their effects on the standalone
MG fault behavior. Specifically, the effects of constant power static loads, constant impedance static
loads, and constant current static loads are analyzed. Also, effects of dynamic (rotating) loads are
highlighted. Results show, that the rotating loads have dominant effects on the fault performance of
the MG during the standalone (islanded) mode. Furthermore, rotating loads cause fault currents and
touch voltages three times the values associated with the static loads. Consequently, the employed protective
devices with the rotating loads MG must be rated three times larger than the employed protective
devices with the static loads MG. Also, the time settings of the MG protection devices are highly
influenced with the load type. For static load MG, it is equal to 250% of the rotating loads MG protection
devices time settings. The three types of static load show different impacts on islanded MG fault
performance. Constant power static load has the highest effect compared to the other two static load
types (namely, constant impedance and constant current static loads). The results obtained in this study
provide a guide for the MG protection designers and planners to consider the effects of load type on the
MG protection devices rating and setting.