Managing DER in Distribution Networks Using State Estimation & Dynamic Operating Envelopes

This paper explores an implementation of state estimation and dynamic operating envelopes (DOEs), applied to manage distributed energy resources (DER) within distribution networks. A technology platform has been established within the Ergon Energy Network and Energex digital domain to implement a novel Distribution System State Estimation (DSSE) engine. The network visibility achieved using DSSE supplies subsequent capacity constrained optimisation processes which facilitate the determination of dynamic operating envelopes. The envelopes, calculated in near real-time, reflect the export and import opportunities for DOE-enabled DER while maintaining the network within operational and technical limits. Results from analysis on networks in south-east Queensland reveal the opportunity to export exists for previously constrained DER. The work also highlights the potential for networks to manage the anticipated growth in electric vehicles and batteries using DOE without needing to augment physical assets.