Transmission distribution coordination for DER fault ride through support

Rapid renewable energy sources (RESs) deployments in transmission and distribution networks have changed power systems’ operation control mechanisms. This fundamental shift makes the interaction between systems more sensitive requires robust TSO–DSO coordination to ensure system stability ancillary services for entire network. paper uses an electromagnetic transient (EMT) simulation tool using a real-time digital simulator (RTDS) investigate dynamic transmission–distribution with high share of RESs fault ride-through (FRT) capability distributed resources (DERs). Then, implements current injection (FCI), incorporating inverter-based (IBRs) support voltage responses system. Different reactive schemes are examined evaluate FRT performance DERs under different locations. Additionally, hardware loop under-voltage protection relay is implemented validate low-voltage DERs. The comparison results show that can provide through FCI from IBRs help DER ride through. also significantly enhances fault-induced delayed recovery voltage-sensitive load