CONGESTION MANAGEMENT IN DEREGULATED POWER SYSTEM USING MARKET SPLITTING BASED APPROACH by Manish Harchand
Abstract
Congestion management in deregulated power system is a major issue which hinders the fair competition among various players. Congestion in deregulated power system occurs mainly due to the insufficient capacity of transmission lines, which is unable to accommodate all the desired power transactions. This research work proposes market splitting based approach for congestion management. The objective of this research work is to minimize the generation cost of generation companies subject to various constraints such as power balance equality constraint and generator operating limit, line flow limit and bus voltage limit inequality constraints. The proposed problem has been solved for base case without congestion and then with including the effect of congestion. In base case, as the location marginal prices (LMPs) are same everywhere, hence the market can be cleared at single price. In case of congestion, different zones are used for market splitting. Within a particular zone, a single LMP is obtained by taking average of all the LMPs at different locations of one zone. The zone with highest LMP can be used for placement of DG which further helps for congestion management. The proposed problem has solved with DC Optimal Power Flow (DCOPF) in MATLAB environment. The results obtained after DCOPF are used to obtain state of the power system and actual line flows with the aid of MIPOWER software. The simulation results are obtained for modified IEEE 14 bus system. The proposed approach has the advantage that it can be applied in Indian market scenarios for congestion management
