A Fixed-Flexible BESS Allocation Scheme for Transmission Networks Considering Uncertainties

TL;DR

This paper introduces a fixed-flexible BESS allocation scheme leveraging Lithium-ion and Vanadium redox flow batteries to optimize economic and operational benefits in wind-integrated transmission networks amid uncertainties.

Contribution

It proposes a novel BESS allocation scheme that exploits the complementary features of LI and VRF batteries for improved system performance.

Findings

Reduces system operation costs

Decreases wind spillage and voltage fluctuations

Shortens payback period

Abstract

Battery energy storage systems (BESSs) can play a key role in mitigating the intermittency and uncertainty associated with adding large amounts of renewable energy to the bulk power system (BPS). Two BESS technologies that have gained prominence in this regard are Lithium-ion (LI) BESS and Vanadium redox flow (VRF) BESS. This paper proposes a fixed-flexible BESS allocation scheme that exploits the complementary characteristics of LI and VRF BESSs to attain optimal techno-economic benefits in a wind-integrated BPS. Studies carried out on relatively large transmission networks demonstrate that benefits such as reduction in system operation cost, wind spillage, voltage fluctuations, and discounted payback period, can be realized by using the proposed scheme.