Flexibility aggregation via set projection for distribution grids with multiple interconnections

TL;DR

This paper introduces a novel method for computing Feasible Operational Regions in distribution grids with multiple interconnection points, addressing a practical limitation of existing approaches and enhancing coordination between TSO and DSO.

Contribution

The paper proposes a new approach to compute FORs in distribution grids with multiple interconnections, extending existing methods that assume a single interconnection point.

Findings

Method successfully computes FORs with multiple interconnection points.

Analyzed high-dimensional FOR properties in a test grid.

Improves TSO-DSO coordination in complex grid configurations.

Abstract

With the increasing number of flexible energy devices in distribution grids, coordination between Transmission System Operators (TSOs) and Distribution System Operators (DSOs) becomes critical for optimal system operation. One form of coordination is to solve the overall system operation problem in a hierarchical way, computing Feasible Operational Regions (FORs) for the interconnection between TSO/DSO. Most methods for computing FORs rely on the assumption of only one interconnection point between TSO and DSOs, which is often violated in practice. In this work, we propose a method for computing FORs in distribution grids with multiple interconnection points to the transmission grid. We test our method in a grid with two interconnecting points and analyze the properties of the resulting high-dimensional FOR from a power systems perspective.