Toward Coordinated Transmission and Distribution Operations

TL;DR

This paper introduces a coordinated transmission and distribution operation model utilizing Surrogate Lagrangian Relaxation, demonstrating improved computational efficiency and effectiveness through numerical experiments on benchmark systems.

Contribution

It presents a novel coordinated operation model for transmission and distribution systems solved with a Surrogate Lagrangian Relaxation approach, outperforming existing methods.

Findings

SLR approach shows better computational performance than subgradient methods.

The model effectively coordinates transmission and distribution resources.

Numerical experiments validate the model's practical usefulness.

Abstract

Proliferation of smart grid technologies has enhanced observability and controllability of distribution systems. If coordinated with the transmission system, resources of both systems can be used more efficiently. This paper proposes a model to operate transmission and distribution systems in a coordinated manner. The proposed model is solved using a Surrogate Lagrangian Relaxation (SLR) approach. The computational performance of this approach is compared against existing methods (e.g. subgradient method). Finally, the usefulness of the proposed model and solution approach is demonstrated via numerical experiments on the illustrative example and IEEE benchmarks.