Battery Energy Storage Systems (BESS) play a crucial role in both frequency and voltage regulation in power grids. While they are effective in both areas, specific scenarios might favor their use for voltage regulation over frequency regulation. Here are some key distinctions:
Preference for Voltage Regulation Scenarios
1. Voltage Stability in Distribution Networks
- High PV Penetration: In distribution networks with high photovoltaic (PV) penetration, BESS can mitigate voltage rise during peak PV generation and voltage drop during peak load periods. This is particularly important because PV systems can cause voltage fluctuations due to their variable output, especially in low-voltage distribution feeders.
- Distributed Control Methods: BESS can be controlled using distributed methods like local droop-based control and consensus algorithms to ensure that feeder voltages remain within allowed limits, addressing the specific challenges of voltage stability in distribution networks.
2. Local Voltage Support
- Load Management: In localized areas with significant load variations, BESS can provide targeted support to stabilize voltage levels. This is especially beneficial in scenarios where traditional grid infrastructure may not be able to handle rapid changes in demand effectively.
- Microgrids and Islanded Systems: In microgrids or islanded systems, BESS can offer localized voltage regulation, ensuring reliable power supply even when isolated from the main grid.
3. Reactive Power Compensation
- Reactive Power Control: BESS can adjust reactive power output to compensate for voltage imbalances by absorbing or releasing reactive power when needed. This capability allows for finer control over voltage stability compared to frequency regulation alone.
Advantages of BESS for Voltage Regulation
- Fast Response Time: BESS can respond rapidly to changes in voltage, making them ideal for real-time voltage control.
- Wide Adjustment Range: They can handle a wide range of adjustments, allowing for precise voltage regulation.
- High Reliability: BESS systems are highly reliable, ensuring consistent performance in maintaining voltage stability.
In summary, while BESS is critical for both frequency and voltage regulation, scenarios involving high PV penetration, localized load management, and reactive power compensation often favor its use for voltage regulation due to its ability to address specific challenges in distribution networks and provide localized support.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/are-there-specific-scenarios-where-bess-is-preferred-for-voltage-regulation-over-frequency-regulation/
