Coordinated Optimal Power Quality Management in Distribution Systems Using The Residual Capacity of Community IBRs

TL;DR

This paper introduces a coordinated optimization model that leverages the residual capacity of community inverter-based resources to effectively mitigate voltage unbalance in distribution systems.

Contribution

It develops a sequence-domain network model with convexified constraints to better utilize community IBRs' collective capacity for power quality management.

Findings

Simulation results confirm improved voltage unbalance mitigation.

Experimental validation demonstrates practical effectiveness.

The model efficiently exploits unused inverter capacity.

Abstract

This letter proposes a network-wide coordinated optimization model to mitigate voltage unbalance (VU) by unleashing the remaining capacity of community inverter-based resources (IBRs). Existing single-sequence strategies ignore coupled capacity constraints and cause idle headroom. Meanwhile, they fail to harness the collective governance capabilities of community IBRs. To solve this discrepancy and exploit the unused potential, we developed a sequence-domain network model in dual commonly shared synchronous reference frames. Strict phase current and apparent power limits are formulated and convexified via polyhedral approximations. A quadratic objective function flexibly balances sequence capacity allocation. Simulation and experimental results validate the effectiveness of the proposed strategy.