Fault Ride-Through (FRT) capability is essential for ensuring power system stability, particularly as grids integrate more renewable energy sources like wind and solar. FRT enables power generation units and equipment to remain connected and operational during faults, such as voltage dips caused by short circuits or lightning strikes. This feature is critical for grid reliability, helping avoid disconnections that could otherwise lead to widespread outages.Â
A key challenge with renewable energy sources is their reliance on power electronic converters, which may lack inherent FRT capabilities. This can result in these units disconnecting from the grid during voltage fluctuations. By equipping renewable systems with FRT-compliant control systems, grids can ensure the continued operation of wind turbines, solar inverters, and other renewable sources during faults. This enhances the seamless integration of renewable energy into the grid and strengthens overall system resilience.Â
FRT not only improves the reliability of the grid but also reduces stress on the system. Equipment can continue operating during faults, preventing damage and extending their lifespan. Voltage Ride-Through focuses on managing voltage sags during faults, while Frequency Ride-Through ensures system stability when grid frequency deviates.Â
FRT's relevance spans across various types of power generation systems. Wind turbines, for example, utilize technologies like Doubly-Fed Induction Generators (DFIGs) and full-converter wind turbines to manage fault currents. Solar PV systems use advanced inverters to continue operating during voltage sags. Even conventional generators benefit from FRT, where synchronous generators' mechanical inertia plays a vital role in system stability.Â
By integrating control strategies such as dynamic voltage and frequency control, energy storage systems, and advanced inverters, modern grids can dynamically respond to faults. This real-time management enhances FRT capability and contributes to smoother fault recovery, safeguarding grid integrity.Â
Overall, FRT capability is a critical component of modern power grids, especially in a landscape increasingly dominated by renewable energy sources. Its implementation is key to creating a resilient and reliable electricity network, capable of withstanding and recovering from various grid disturbances.