875KW/1631KWH Seamless Switching in Myanmar
Project Overview
This project showcases a BESS for Microgrid in Myanmar, deploying an 875kW/1,631kWh seamless-switching system built on Galaxy233L-AIO-2H to ensure stable, continuous microgrid power.
To address Myanmar’s weak-grid conditions and limited electricity access, FFD POWER deployed a PV-plus-BESS microgrid that enables seamless on/off-grid switching for stable power supply. The system integrates 1.1MW solar PV with a 875kW/1,631kWh BESS, demonstrating how a PV-plus-BESS microgrid can bridge the gap between a weak, time-limited utility supply (around 4 hours per day) and continuous on-site demand—capturing surplus solar during grid-on periods, enabling seamless on/off-grid switching, and significantly reducing diesel generator runtime and operating costs.
Project Background
In Myanmar, many commercial and industrial sites operate under weak-grid conditions—characterized by frequent outages, voltage fluctuation, and limited utility capacity. For remote locations, dispatching maintenance personnel and fuel deliveries can be challenging, making resilient microgrid operation essential for production continuity and equipment protection.
Project Challenge
- Weak Grid: Unstable voltage/frequency and periodic outages disrupt operations.
- Limited Access: Remote location and constrained logistics require autonomous, low-maintenance operation.
- High Diesel Cost: Reliance on gensets increases fuel consumption and O&M burden.
FFD POWER Solution
FFD POWER implemented a PV-plus-storage microgrid combining solar PV, a 20ms fast switching, and an EMS. The BESS provides fast voltage/frequency regulation and seamless switching between grid-connected and islanded modes, while coordinating with a diesel generator so both sources can back up each other when required.
System Specifications
- PV installed : 1.1 MW
- BESS POWER : 875 KW
- BESS Capacity : 1,631 KWH
- Product used : Galaxy233L-AIO-2H (125kW/233kWh Unit) * 7
- Architecture: PV + BESS Microgrid where Diesel Generator and BESS Backup Each Other
Operational Logic: Seamless Microgrid Operation
The system’s operational logic is designed for weak-grid environments with limited access:
- PV Priority & Smart Charging: With utility power available for only around 4 hours per day, the BESS primarily captures surplus PV energy during grid-on periods and charges under EMS-managed power limits, enabling solar utilization beyond the grid-available window while reducing stress on the weak grid.
- Seamless Switching & Power Quality Support: When the grid becomes unstable or is lost, the PCS transitions to island mode and maintains voltage and frequency, enabling uninterrupted operation for critical air compressor loads.
- Diesel Efficiency Optimization: When the diesel generator is required, EMS adjusts BESS charge/discharge to keep the genset within its most efficient operating range, reducing fuel consumption and minimizing low-load wet-stacking risk.
