Selecting Bilateral Transactions for Minimum Losses in Deregulated Power System -- An Assignment Model Approach

The optimal power flow issue is one of the most important problems faced by dispatching Engineers regarding large scale power systems. It is a mathematical approach of the global power system optimization problem that aims at determining the least control movements to keep power system at most desired state. Thus, it represents flexible and powerful tool, which can address a wide range of planning and operation studies. However, the complexity of optimal power flow increases dramatically with large scale networks, which often discourages the utilization of this powerful tool in many applications. In the deregulated environment it allows bilateral transactions in which it becomes necessary to select the transactions which are suitable for consumer end to specified generator. The Optimal Power Flow (OPF) problem with transmission loss as an objective function is formulated as an Assignment problem and is solved by using Hungarian technique. The test cases used in this paper are the standard IEEE-6 bus. Results obtained by using assignment problem by Hungarian technique.