Battery energy storage systems are versatile large-scale energy storage technologies that can:
Provide energy during peak demand (peak shaving).
Store energy during low demand (valley filling).
Regulate grid frequency and phase (frequency and phase modulation).
Offer emergency support in case of grid failure (emergency backup).
Compared to traditional power sources, they can quickly adapt to load changes, enhancing grid stability and power supply quality, while also promoting energy structure optimization and economic benefits.
The Power Conversion System (PCS) is the device that connects batteries to the grid and is responsible for:
Controlling the charging and discharging of batteries.
Converting energy between AC and DC.
Supplying AC loads directly in the absence of the grid.
The PCS communicates with the Battery Management System (BMS) to monitor battery status and ensure safe charging and discharging. In short, the PCS is a core component in electrochemical energy storage systems for managing electrical energy and ensuring battery safety.
The energy storage bidirectional converter (PCS) is a four-quadrant converter that can control the AC/DC side and realize the AC/DC bidirectional conversion of electric energy. PCS can realize the bidirectional energy transfer between the DC battery of the battery energy storage system and the AC power grid, and realize the charge and discharge management of the battery system, the tracking of the load power at the grid side, the control of the charge and discharge power of the battery energy storage system, and the control of the voltage at the grid side in the off-grid operation mode through the control strategy.
