| Abstract [eng] |
The purpose of the final thesis is to study the impact of wind farms on the stability of the transmission network. A system model has been prepared to simulate various scenarios. The results obtained are evaluated based on various sources and scientific articles. The DIgSILENT PowerFactory software package is used to conduct the study. Using this software, the “Transmission system” model is used as a base, which was modified to meet the requirements of the Lithuanian electricity system. During the study, the system response to a fault and its ability to return to normal operation were assessed. Frequency fluctuation, rotor angle deviation, network voltage and the system's ability to return to normal operation were assessed. It was found that integrating a large number of wind farms, especially those with low or no inertia, significantly reduces the system's ability to suppress frequency fluctuations after disturbances. Rotor angle analysis also showed an increased risk of loss of synchronization at low inertia. The study conclusions are relevant for energy system designers and network operators seeking a smooth transition to a climate-neutral energy system. |
