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A good distribution system should ensure that the voltage variations at consumer's terminals are within permissible limits. To improve the voltage profile in distribution systems, a new concept of Voltage Improvement Factor has been used in this paper. The proposed method is implemented on IEEE 15 bus radial distribution system. Index Terms: Capacitor placement, capacitor sizing, distribution system, voltage profile, voltage improvement, Voltage improvement factor, VIF I. Introduction Distribution system is the final link between the high voltage transmission system and the consumer. The power flows through the distributor to feed the consumer load. The transfer of reactive power (VAr) over the line (1) causes voltage drop and hence the developed losses make the system inefficient. The permissible voltage variations is plus minus 5% of rated voltage at the consumer's terminals (2). Thus, the compensation of reactive power is necessary for the enhancement of the voltage to make the system more reliable and efficient. In the past, various methods have been proposed for reactive power compensation to improve the voltage profile such as analytical methods (3), numerical programming methods (4), heuristics methods (5), genetic algorithm (6), simulated annealing (7),fuzzy logic (8), PSO (9) and PGSA method (10). In this paper, voltage profile improvement will be done by Var compensation using capacitor placement with the help of Voltage Improvement Factor (VIF). The proposed method is tested on 15 bus radial distribution systems.

Voltage Enhancement in Distribution System using Voltage Improvement Factor