Editorial: Advanced intelligent control strategies for solar and wind farms

This research topic addressed new and advanced techniques in controlling, operating and augmenting solar photovoltaics (PVs) and wind turbines low voltage or fault ride through scenarios. This is necessary for the effective operation of solar and wind farms based on the stipulated grid codes (requirements).

The first paper on this research topic (Okedu) investigated three types of Fault Current Limiters (FCLs) that were tied to the network side of a Permanent Magnet Synchronous Generator (PMSG) wind turbine. These three FCLs are; Series Dynamic Braking Resistor (SDBR), traditional Bridge Fault Current Limiter (BFCL), and Capacitive Bridge Fault Current Limiter (CBFCL). The modeling of the PMSG wind turbine (Okedu and Barghash 2021), and those of the FCLs were done and analyzed in the wind generator considering severe three-phase to ground fault, in order to test the robustness of the various control strategies. The results show improved performance of the PMSG wind turbine variables when the same conditions of operation were employed, for fair comparison of the three FCL schemes