| Abstract [eng] |
The implementation of the strategic projects of the Baltic power system is aimed at synchronizing with continental European networks. Due to the changed structure of the system stability and reliability problems could arise. The aim of the study is to evaluate small-signal stability of the Baltic power system and to determine the effectiveness of possible problem-solving methods. The main tasks of the study: to carry out a modal analysis of the system under investigation, to identify the optimal places for the oscillations damping devices installation, to check their efficiency by modeling the dynamic processes of the system. The research model is being developed for the 330 kV transmission network of the Baltic States including existing high voltage direct current converters, and the dynamic model is implemented according to typical parameters. In this study, linear system eigenvalue analysis method is used to detect oscillation modes. Six system operating modes are analyzed, which defines the typical and boundary conditions of the system. To evaluate the effectiveness of the oscillation damping methods several cases are modeled when the systems works with and without oscillation damping devices, and when the additional transmission line is modeled in restrictive cross-border between the individual parts of the system. At the end of the study, efficiency estimation of the applied oscillation damping methods is presented. |
