BESS Auxiliary Power
Most BESS products on the market require an external power supply circuit for their auxiliary loads, although some have built-in circuits and do not
3. Voltage Support with Battery Energy Storage Systems (BESS) Voltage support is a critical function in maintaining grid stability, typically achieved by generating reactive power (measured in VAr) to counteract reactance within the electrical network.
Instead of relying solely on large, centralized power plants for reactive power, BESS can be installed at key locations across the grid, or distributed near large load centers. This distributed approach allows for a more localized response to voltage fluctuations, improving grid reliability and reducing transmission losses.
Some BESS suppliers mandate uninterrupted power to maintain the operation of thermal management systems, ensuring battery temperatures remain within desired limits to minimize degradation. BESS fire safety standards, such as NFPA 855, outline minimum requirements for backup power for fire safety systems.
BESS auxiliary loads typically fall into the following three categories: ● Control and communication equipment, such as the battery management system and network switches; ● Thermal management systems, such as HVAC or chillers; ● Fire safety systems, such as fire alarms, control panels and gas ventilation systems (if present).
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