Impact of large scale power plant connection on congestion in the algerian electricity transmission system

In the context of the electrical system, the implementation of a new power plant must be submitted for review so that the economical and technical aspects of the electrical system would not be altered, so far as possible, by this implementation. The conditions set by Directives relating to the electricity company for connecting to the power grid, should also be considered. In addition, the results of the study, made by the network manager, must include feasible solutions for integrating the new generation. This paper gets in sight of the constraints that may occur on the power system after integrating new installation. For this purpose, the Algerian power system was chosen as example to examin the impact of large scale power plant connection on network congestion. The congestion costs associated with this connection are assessed using buy back model. Tow scenarios are considered in order to assess the impact of such power plant on network congestion. These scenarios correspond to the maximum and the minimum of a typical daily demand. The results show that this connection highlights a transmission congestion at the maximum demand level. In order to relieve this congestion, it is recommended to reinforce the concerned transmission line.