Abstract: This paper presents effect of shunt capacitor banks in distribution network on voltage, losses, and lines loading. This paper also presents efficient use of existing shunt capacitor banks for voltage-var control in distribution system in order to avoid installation of new shunt capacitors allowing economy of operation. In order to verify the effectiveness of 33 IEEE Bus system the procedure has been simulated to the 12.66 kV . IEEE 33 bus network has been modelled using Mi-Power power system analysis software which is developed by M/s PRDC Bangalore. Results of tests which are conducted on the model system in various possible field conditions are presented and discussed. Simulation results are presented to show the potential of application of the proposed method.

Keywords: Voltage collapse, voltage stability, shunts capacitor, line loading.