JPS_V3_N3_RP4 G. Venkata Sai Sivakumar D. Ragaleela Journal on Power Systems Engineering 2322–0376 3 3 23 31 Restructured Power System, Transmission Power Flow Tracing, Proportional Sharing Principle, Bialek's Algorithm, Loss Allocation Deregulation is the major trend in the electric power industry throughout the world, in which restructuring of electricity network was done to access power from any generator to any load and to introduce competition by paving way for the private participants. In this transmission, network plays a very important role. One of the key issues of this restructured power system is, power loss allocation that needs to access what impact of particular generator or load on power system, for which power flow is to be traced along the lines. Tracing of power determine the contribution of transmission users to transmission usage, also helps to meet the revenue expectations and support efficient operation of electrical markets and adequately reimburse owners of transmission assets, in this view tracing of electricity has gained significance. In this paper, power flow tracing using AC power flow and the proportional sharing principle has been attempted, which is Bialek's power flow tracing which comes in two flavors, up-stream and down-stream algorithms by considering gross, net and average power flows in the network. The application of these techniques are explained, tested on IEEE-14 bus system and results are compared between all approaches using MATLAB. August - October 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=3634