Non-uniformity impact of power losses in Kurzemes ring project case

Presented paper is devoted to research circulation current influence on losses in non-uniform network, when ratio of reactance to resistance is not equal for branches. Project Kurzeme Ring aims to improvement of costumer´s power supply reliability and changing the transmission network topology. The goal is to consider the problem for non-uniform meshed networks. The projected Kurzeme Ring which is located in west Latvia is under consideration. Considered network consists of 330 kV power line ring which feeds the 110 kV meshed network inside it. In total the scheme includes about 50 branches and 13 loops. Three possible test cases are given for power losses and circulating currents evaluation and analysis.