Abstract
The dynamic interaction between wind farms, now serving as power plants directly connected to transmission networks, is increasingly significant as they replace traditional synchronous machine-based generation. This interaction is particularly vital as power swing rates rise due to reduced system inertia. This thesis focuses on the analysis of power swing blocking protection element performance in the context of the widespread adoption of Type 4 grid-integrated wind turbine systems. The study involves designing and integrating converter controls for large Type 4 wind turbine plants into a 12-bus benchmark power system that is modeled using a Real Time Digital Simulator (RTDS).
The research assesses the dynamic response characteristics of integrated wind generation systems in comparison to synchronous generators during fault-contingencies. This analysis uses a distance protective relay model in RTDS to examine the effective impedance seen by the relay during a power swing. The study examines differences in the operation of the distance protection element and proposes an enhanced protection element to ensure the correct functioning of the relays. The results for fault contingencies with WTG’s demonstrated the effectiveness of the protection scheme