16. Network-secure aggregator operating regions with flexible dispatch envelopes in unbalanced systems

Distribution networks need to manage increasing distributed energy resources (DER). While dynamic operating envelopes (DOE) help integrate DER into markets, existing approaches often assume networks are balanced, and this can cause problems in unbalanced networks. We propose the combination of robust aggregator operating regions with flexible
dispatch envelopes (RAR-DE), allowing network operators to set sophisticated operating boundaries to aggregators while maximizing market participation. This approach balances market opportunities with network security in unbalanced three-phase systems.