Evaluation of Power Systems Congestions Using Nodal Price Analysis

In the deregulated power systems, the congestion management is a fundamental task for an independent system operator (ISO). This paper explores the share of the market participants in the nodal prices congestion component. In the paper, the nodal prices have been divided into a component for the generation and the losses and a system congestions component. The computation and the analysis of the nodal prices have been realized with a modified version of MATPOWER. In addition this paper analyses the consequences of system participants’ bid behaviour and its effect on the systems congestion. Results from simulated experiments are presented on a 15-nodes test system as well as on a realistic high voltage network.