Ferreira, JuditeVale, ZitaCardoso, JoséPuga, Ricardo2013-05-302013-05-302008978-1-4244-1743-8http://hdl.handle.net/10400.22/1643This paper presents a software tool (SIM_CMTP) that solves congestion situations and evaluates the taxes to be paid to the transmission system by market agents. SIM_CMTP provides users with a set of alternative methods for cost allocation and enables the definition of specific rules, according to each market and/or situation needs. With these characteristics, SIM_CMTP can be used as an operation aid for Transmission System Operator (TSO) or Independent System Operator (ISO). Due to its openness, it can also be used as a decision-making support tool for evaluating different options of market rules in competitive market environment, guarantying the economic sustainability of the transmission system.engCongestion managementElectricity marketTransmission priceTransmission useDistribution factorsconference object2013-04-12