Distribution System Power Loss Segregation

Abstract

Technical and non-technical losses occurring in distribution system of Pakistan have increased beyond acceptable limits of 5-7%. Hyderabad Electric Supply Company is suffering from distribution losses of around 25%, which are far above the accepted level. Segregation of power losses due to different reasons help in developing a priority based remedial programs that will enhance overall efficiency of the company and improve revenue generation. In this research work, one of the 11kV distribution feeder is analyzed for power loss segregation. Collected data shows 27% of total losses for the month of August 2018. Collected data is used for modelling and simulation of selected feeder using PSS SINCAL software. Simulation analysis of existing system gives 10.59% technical losses indicating 16.41% of theft. Effect of improper conductor size and jumpers, poor power factor and unbalanced loading are considered as major contributor to technical power losses. Maximum power loss reduction on feeder is possible with balancing of loads on L.T circuits of transformers. On the other hand power factor improvement through installation of capacitors on H.T side also reduce sufficient power losses on the feeder. Hence small efforts can improve system efficiency without much investment.