Droop control plays a crucial role in the frequency regulation of Battery Energy Storage Systems (BESS). It is a control strategy that helps maintain grid stability by adjusting the active power output of a BESS in response to deviations in the grid frequency.
Key Functions of Droop Control in BESS Frequency Regulation
- Proportional Relationship: Droop control establishes a proportional relationship between the frequency deviation and the active power output of the BESS. When the grid frequency decreases (underfrequency), the BESS increases its power output to compensate for the shortage. Conversely, when the frequency increases (overfrequency), the BESS decreases its power output to avoid surplus energy.
- Stability and Compliance: By responding to frequency changes, BESS can help maintain grid stability, ensuring compliance with grid codes and regulations. This enables better integration of renewable energy sources and other distributed energy resources into the grid.
- Adaptive Control: Advanced droop control strategies can adapt to changing conditions such as system disturbances and state of charge (SOC) of the batteries. For example, the control coefficient can be adjusted based on the SOC to prevent overcharging or over-discharging while enhancing frequency regulation capabilities.
- Enhanced System Frequency Regulation: By effectively managing power output through droop control, BESS can reduce the maximum frequency deviation and improve the rate of change of the system frequency. This is especially beneficial in systems with high penetration of renewable energy.
In summary, droop control is essential for BESS to provide effective frequency regulation, enhancing grid stability and supporting the integration of variable renewable energy sources.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-role-does-droop-control-play-in-bess-frequency-regulation/
