This book gives a basic knowledge of the regulated power system and how it is changing to deregulated power system for the betterment of the electrical system. It show the basic structure of both the systems and reason for its transformation. It gives the overview of different transmission pricing methods & power tracing. Power tracing is done based MW-Mile method, which uses Bialek's upstream tracing algorithm to allocate usage based transmission cost to generators, is used here to calculate embedded cost. It takes into account magnitude of power and distance traveled by power transaction but it does not generate any signal for capacity expansion of transmission line of the network. A case study based on 5 bus test system, 14 bus test system, 30 bus test system & 57 bus test system is used to illustrate the working of the proposed technique. Further the comparison of the transmission pricing methods is done to find out the most efficient method of transmission pricing. In the restructured operation of power systems the economics governs the transactions and security and stability issues are taken care of by the independent system operator.