Market power on electiricity market

Glavni problem u ovom radu je bio identificirati iskorištavanje tržišne snage. Mogu se koristi tehnike koje se primjenjuju ex ante – traženje potencijala za korištenje tržišne snage, i one koje se primjenjuju ex post – obično se traži korištenje tržišne snage. Također se mogu podijeliti u kratkoročne analize i dugoročne analize. Najvažnija podjela metoda mjerenja težišne snage je na strukturalne indikatore i analize, indikatore i analize ponašanja te simulacijske modele. U ovom radu je korišten simulacijski model na bazi agenata. U takvom modelu svaki se agent ponaša po vlastitim željama i interesima. Simulacija je izvršena na modelu sa 11 čvorova i simulirano je 14 strategija za svaki GenCo i jedna simulacija bez strategija radi referentne veličine. Kao rezultat simulacija otkriveno je da svi GenCo-i osim GenCo-a 4 mogu iskorištavati tržišnu snagu. U međusobnom natjecanju u fizičkom zadržavanju najprofitabilniji je GenCo 4 a u cjenovnom ispitivanju GenCo 3.Main problem in this paper was identifying companies that are using market power. There are techniques that are used ex ante – looking for potential for market power usage, and those that are used ex post – looking for market power usage. They can also be divided into short term and long term analysis. Most important division is into structural indices and analysis, indices and analysis of behavior, and simulation models. In this paper is used agent based simulation model. In that kind of model every agent conducts according to his own wishes and interests. Simulation is conducted on 11 node model. It contained 14 strategies for each GenCo and one simulation without strategies for reference purposes. As a result of simulation it is discovered that all GenCos can use their market power with exception of GenCo 4. When competing between themselves GenCo 4 has greatest profit in physical withholding, and GenCo 3 in price probing