A Fixed-Flexible BESS Allocation Scheme for Transmission Networks Considering Uncertainties
For power system operators, the scheme offers a practical approach to integrate renewable energy while improving techno-economic performance.
This paper proposes a fixed-flexible BESS allocation scheme combining Lithium-ion and Vanadium redox flow batteries to reduce system operation cost, wind spillage, voltage fluctuations, and discounted payback period in wind-integrated transmission networks.
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.