Location
Southeast Asia
Completion
2025-03
Service Type
Primary Reserve · Grid Integration
Capacity
25MW / 50MWh
25MW / 50MWh
System Capacity
≤150ms
Response Time
200MW CCGT
Grid Integration
+42% vs baseline
Frequency Stabilized
The Problem to Solve
The combined-cycle power plant operator needed to improve grid frequency response without adding new generation capacity. The island grid's isolated nature made N-1 contingency events particularly destabilizing. Existing thermal plant ramp rates (5MW/min) were insufficient for modern grid stability requirements. High ambient temperatures (up to 45°C) and coastal humidity required a robust thermal and corrosion protection design.
Our Approach
We integrated a 25MW / 50MWh BESS alongside the plant's existing 33kV busbar, with a dedicated power island controller that coordinates between the gas turbine EMS and the battery EMS. When frequency drops below 49.5Hz, the BESS injects power within 150ms — 20× faster than the gas turbine can ramp. The system uses IP55-rated containers with enhanced corrosion protection coatings for coastal environments.
Technical Specifications
Measurable Results
- Frequency nadir improved from 48.8Hz to 49.4Hz during N-1 events
- Grid frequency stability index improved +42% vs pre-installation baseline
- Response time 150ms — 20× faster than gas turbine ramp capability
- Plant spinning reserve requirement reduced, saving fuel costs annually
- System operating at 99.6% availability in tropical climate conditions
Get a Similar Solution
Does your project have similar requirements? We can design a custom BESS solution for your grid.