Performance of Karot Distribution Line as Influenced by Management of Water Pumping Loads

Power quality remains one of the most important aspects of the operation of electrical distribution systems. Starting of induction motors causes a voltage sag which negatively affects the power quality. In the present research, the effect of simultaneous energization of water pumping motors on the operation of Karot distribution line is studied. Transient analysis of induction motors during their acceleration period is pursued using ETAP package. The obtained results indicate that the line experience a 20% voltage sag for 7 seconds on simultaneous energization of 16 motors from the line with a subsequent power outage. Management of motors' operation to avoid their simultaneous acceleration is aimed at improving the power quality of the line. Cascaded operation of the motors results in eliminating the voltage sag problem where the line voltage never drops below 0.95 pu due to motors' acceleration.