Large Energy Storage Systems: Finding the Right Equilibrium

Lately, large energy storage systems have emerged as crucial components in the shift towards sustainable energy. While electricity is the main output for the average individual, from a systemic standpoint, this is not always the case. Achieving a harmonious equilibrium among the battery cells, the BESS facility, and the power grid—the three mainstays of BESS—is essential for the successful storage and transfer of electricity.

1. Striking a Balance Among the Battery Cells

BESS collects data on voltage, current, and temperature from battery cells grouped into modules or racks. Ensuring battery cell equilibrium—comprising redistributing charge among the battery cells—and managing potential thermal issues during the charging and discharging procedures will guarantee the effectiveness and efficiency of a storage unit.

2. Finding the Correct Equilibrium in the BESS Facility

BESS facilitates the smooth functioning of all the units within the energy storage system. It encompasses units like PCS and auxiliary systems for environmental monitoring, backup power, and access control. Monitoring temperature, air quality, and flood risk at BESS facilities is crucial due to previous incidents. Any potential problems can be addressed through remote monitoring and management.

3. Establishing Equilibrium in the Power Grid

BESS ensures a balanced flow of electricity between generation, transmission, distribution, and consumption. Excessive electricity is stored during peak generation periods. In times of high electricity demand, the energy storage system can swiftly deliver power to uphold grid stability. For instance, in 2017, the South Australia Tesla storage facility saved the day by stabilizing the grid within milliseconds, averting sizable power failures.

Beneath the fluctuation of electric currents lies a stream of real-time data. This data, analyzed promptly and decisively, is key to maintaining energy equilibrium. Nevertheless, obtaining this critical information is challenging due to varied communication protocols employed by different vendors and sensors, erratic transmissions influenced by unpredictable weather conditions and harsh environments, and security considerations.

Evidently, the BESS sector is still in its infancy and packed with hurdles. Nonetheless, continuous technological advancements ensure the industry’s vitality, propelling it towards the future.

For further details, please check out the Moxa’s Battery Energy Storage System Portal.