Abstract

the Loads in distribution systems are mostly inductive this coming from nature of system such as transformer and transmission lines, and most devices used in house is motors with reactive power consuming. For these reasons and others it will cases to reduce the voltage profiles and increases in power losses. The most distribution system is radially connected, the high voltage distribution system 33kv doesn't severe from low voltage problems; this is coming from nature of high voltage it is low voltage drop in transmission line and also the almost the substation 33kv supplied with capacitor banks. However The medium voltage distribution system 11kv, and low voltage distribution system 0.4kv are severe from low voltage problems at buses; this is coming from nature of high current in low voltage systems will cause high voltage drop in its wires, and these distribution systems are radial connection without capacitor banks. In this paper presented optimal capacitor placement and sizing to overcome to the low voltage problem and total power loss reduction of both these distribution systems. Simulation results are investigated on realistic in realistic radial feeder 11kv of alkaherat network 33kv which represent one of Karbala 33kv distribution system networks, feeds rural area with 20-bus load system of aburwaia region, after that apply to 0.4kv radial distribution system with 26-bus load system of alzwaia region one load of the feeder above. Results such as voltage support and power losses are analyzed. Different simulation results to optimal capacitor placement to voltage support, and minimizes power losses are analyzed by using Genetic Algorithms (GA) implemented in the ETAP software.

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