Multi-Unit Coordinated Regional Preventive Dispatch in Flexible Distribution Systems Based on Secure Adjustment Feasible Operation Regions
Year: 2026
Type: article
Abstract: The high penetration of photovoltaic (PV) generation, energy storage systems (ESSs), and soft open points (SOPs) increases the controllability and mutual-support capability of distribution networks, but it also intensifies net-load fluctuations, bidirectional power flows, and security-margin shrinkage. To support coordinated risk prevention in a multi-unit regional architecture, this paper proposes a multi-unit preventive dispatch method based on secure adjustment feasible operation regions (FORs). At the unit level, a boundary-voltage-robust secure adjustment FOR is constructed by incorporating the lower envelope of PV available power, ESS temporal coupling, SOP operation, and internal network constraints; only the resulting polytope parameters are reported to the regional layer. At the regional level, events are represented as unit-level spillover disturbances, and a preventive model combining a pre-event shared baseline with post-event nonanticipative fast recourse is established under the unit-coordinated architecture. A Minkowski gauge functional is further introduced to define normalized FOR utilization and balance relative margin occupation among heterogeneous units. The seven-unit case study shows that the proposed method reduces aggregate security violation to zero under the six tested scenarios and preserves larger residual margins than the absolute-power-sharing and SOP-ablation benchmarks.
Source: IEEE Transactions on Smart Grid
Institution: Southeast University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,645
OpenAlex ID: W7225307609