Abstract

In a deregulated electricity market, one of the major concerns of system operator (SO) is to ensure the free and fair electricity trading while maintaining system security and stability in meeting the pool and contract demands. Achieving a commercially transparent and technically feasible solution during transmission congestion, therefore, poses a great challenge to SO. Transmission congestion distribution factors (TCDF) based on sensitivity of ac power flow in the lines due to the unit change in the power injection at the buses have been proposed by which the congestion zones are identifies to reschedule the generators and loads in that zone for the congestion management. A conceptually reasonable and computationally feasible approach for the solution of this problem has been developed and is illustrated on two test systems having both pool and contracts loads.

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