Quantifying the value of distributed battery storage to the operation of a low carbon power system

Battery storage provides flexibility to the power system and supports the increased integration of renewable energy sources. Distributed battery storage systems that are behind the meter are operated by their local owners, whose objectives may not align with those of the national power system. This paper presents a Bilevel optimisation approach to investigate the exchange of electricity between distributed battery storage and the national power system. The independent operating objectives of the battery storage systems are explicitly considered to assess their impact on the operation of the national power system. A comparison with a Centralised optimisation approach, that assumes a single objective function for the whole system, shows that the Bilevel optimisation approach captures the independencies of distributed battery storage objectives, while accounting for its interactions with the wider power system. The results show that the Centralised optimisation approach tends to overestimate the value of distributed battery storage for the power system. The results also highlight the influence of the retail contract structure in maximising the value of distributed battery storage for the national power system.

Automated summary

This study investigates the exchange of electricity between distributed battery storage and the national power system using a Bilevel optimization approach that considers the independent operating objectives of the battery storage systems. Results show that the Centralized optimization approach tends to overestimate the value of distributed battery storage, while the retail contract structure plays a key role in maximizing the value of distributed battery storage for the national power system.