Abstract
In this paper, the operational applicability and the economical consequences of an electricity market model based on a discriminatory auction rule is analyzed and compared with a uniform price auction based one. The studied model is based on centralized optimization therefore, the operational constrains and costs are evaluated during the planning process. The existence of a system operating company, which might be a regional utility, with the duty to dispatch generators and the objective to minimize its payment is supposed. To ensure clarity in the scheduling decision process, during the dispatch operation, a sequential process based on a payment index is applied.