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Utilization of Local Flexibility for Charge Management of a Battery Energy Storage System Providing Frequency Containment Reserve

Published: 2018 November
Verlag: Energy Procedia

This paper estimates the potential to reduce market-based charging and discharging of a battery energy storage system (BESS) that provides frequency containment reserve (FCR) through (a) the utilization of degrees of freedom (DOFs) during reserve provision, and (b) the utilization of the flexibility of local power units (LPUs) at an investigated industrial site.

In context of a of a real BESS providing 7 MW of FCR, the potential is quantified based on a simulation using real grid frequency data and real power profiles of LPUs at an industrial site for the year 2016. At the explored site, LPUs identified to provide charge management of the BESS include wind turbines (WT), a combined heat and power plant (CHPP), and power consumption by the fans of a heating, ventilation and air conditioning (HVAC) system. Results indicate that the energy charged and discharged through market-based transactions can be reduced by 56% and 66% respectively; however, the majority of these reductions are caused by the intelligent use of DOFs. Savings by using the flexibility of the mentioned LPUs can be attributed largely to the flexible operation of the HVAC system due to its highest availability and potential to substitute market-based charge events of the BESS.

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