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This paper presents an overcurrent protection scheme for a stand-alone PV system consisting of PV array, DC-DC converter, DC-AC inverter, relay and circuit breaker to fed an irrigation load. This scheme is based on a numerical relay which is composed of rms current converter, integrator, comparator, low-pass filter and reset logic. The model of the system is simulated using MATLAB/Simulink. The performance...
This paper is aimed at investigation steady-state power flow through an extended microgrid (MG) connected to the main supply grid to irrigate about 25 km2 in Toshka area, Egypt. The extended MG includes 576 MG, each contains PV system, wind system and irrigation load. Different aggregation models are proposed to reduce the size of the extended MG into 24-, 12- and 1-MG models. The daily variations...
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