Online current limiting-based control to improve fault ride-through capability of grid-feeding inverters

Grid-feeding inverters require much better operation monitoring and improved performance for their safe efficient integration into the power system. Specifically, these must participate in grid stability enhancement under faulty conditions without any disconnection. In this regard, a fault ride-through capability is proposed an inductive filtered grid-feeding inverter, which controlled both positive negative sequences to ensure dual current control. Grid voltage dips are tackled by injecting reactive according codes requirements. Enhanced active control introduced suppressing oscillations, twice grid-frequency. order avoid inverter semi-conductor components tripping faults, new limiting strategy proposed. It based on real-time reduction using closed-loop magnitude controller. The effectiveness flexibility of verified numerical simulations balanced unbalanced cases.