The consistency of voltage between the PCS and energy storage equipment depends on the specific connection point and system configuration. However, generally, the voltage must be matched. Here are the details:
- DC Side Voltage Consistency Requirement: The energy storage equipment (e.g., battery packs) outputs DC voltage, and the input side of the PCS is also typically DC. Therefore, on the DC side, the output voltage of the energy storage equipment needs to match the input voltage range of the PCS.
- AC Side Voltage Consistency Requirement: The AC output voltage of the PCS typically needs to match the rated voltage of the grid or load. If the PCS converts DC from the energy storage equipment into AC for the grid or devices, the voltage on the AC side also needs to be consistent.
- Necessity of Voltage Matching:
- On the DC side, the voltage between the PCS and the energy storage equipment must be within a compatible range for normal charging and discharging.
- On the AC side, the PCS voltage must match the grid or load voltage, particularly in grid-tied systems, to ensure stable operation.
Thus, the voltage between the PCS and the energy storage equipment needs to be consistent, or within the allowable operating range of the equipment.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/when-connecting-pcs-power-conversion-system-with-energy-storage-equipment-does-the-voltage-need-to-be-consistent/
