Grid-aware aggregation and realtime disaggregation of distributed energy\n resources in radial networks

2019/07/15 by Nawaf Nazir, Nazir, Nawaf, Mads Almassalkhi +1 · 4 citations
Engineering · #FOS: Mathematics #Microgrid Control and Optimization #Optimal Power Flow Distribution #Optimization and Control (math.OC) #Smart Grid Energy Management

paper · pdf · doi:10.48550/arxiv.1907.06709

openalex publication_date 2019/07/15 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28

Abstract

Dispatching a large fleet of distributed energy resources (DERs) in response\nto wholesale energy market or regional grid signals requires solving a\nchallenging disaggregation problem when the DERs are located within a\ndistribution network. This manuscript presents a computationally tractable\nconvex inner approximation for the optimal power flow (OPF) problem that\ncharacterizes a feeders aggregate DERs hosting capacity and enables a realtime,\ngrid-aware dispatch of DERs for radial distribution networks. The inner\napproximation is derived by considering convex envelopes on the nonlinear terms\nin the AC power flow equations. The resulting convex formulation is then used\nto derive provable nodal injection limits, such that any combination of DER\ndispatches within their respective nodal limits is guaranteed to be AC\nadmissible. These nodal injection limits are then used to construct a realtime,\nopen-loop control policy for dispatching DERs at each location in the network\nto collectively deliver grid services. The IEEE-37 distribution network is used\nto validate the technical results and highlight various use-cases.\n

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