Island Microgrid Solution
Summary: Build a 24-hour stable green power supply with PV, storage and diesel, replacing high-cost diesel gensets, covering remote islands in Southeast Asia and Africa.
Solution Overview
For remote islands in Southeast Asia, Africa and the Pacific, a PV-storage-diesel microgrid is built with photovoltaic, diesel/gas generation and energy storage to replace high-cost, high-emission diesel gensets and provide 24-hour stable green power.
Key Points
- Diesel replacement rate can reach 60–80%, significantly reducing fuel and O&M costs
- Static transfer switch (STS) enables <10 ms grid-connected/off-grid transfer
- Integrated core equipment: PCS / STS / BESS / EMS / MPS
- Provides 24/7 off-grid stable green power, supporting black start and frequency regulation
Application Scenarios and Challenges
Island grids are isolated, fuel transport costs are high, diesel genset O&M is difficult and emissions are high; load fluctuates noticeably during peak tourist seasons, placing high demands on power supply reliability.
VGRID System Composition
- Power Conversion System (PCS): as the AC/DC coupling core, it enables PV MPPT, battery charging and discharging, and seamless parallel operation with diesel gensets.
- Static Transfer Switch (STS): millisecond-level transfer between the utility/diesel genset and the microgrid, ensuring uninterrupted power for critical loads such as hotels, communications and medical facilities.
- Battery Energy Storage System (BESS): smooths PV fluctuations, performs peak shaving and valley filling, and provides off-grid black start and frequency regulation support.
- Energy Management System (EMS): dispatches PV/diesel/storage based on load and irradiance forecasts to maximize the green power ratio and minimize fuel consumption.
- Microgrid AC Cabinet (MPS): integrates combiner, protection and AC distribution, simplifying on-site assembly and O&M on islands.
Core Value
- Diesel replacement rate can reach 60–80%, significantly reducing fuel and O&M costs
- Higher green power ratio, meeting the requirements of island eco-tourism and carbon reduction
- Seamless transfer ensures critical loads such as tourism, communications and medical facilities
- Modular deployment, enabling smooth capacity expansion as island demand grows
Typical Applications
Deployed on multiple remote islands in Southeast Asia and Africa, covering power supply for villages, resorts and communication base stations.
Delivery and Support
VGID POWER (VGRID) provides integrated delivery from site assessment, system design and core equipment manufacturing (PCS/STS/BESS/MPS) to commissioning and remote O&M. Please contact us for customized solutions and quotations.
FAQ
Can an island microgrid completely eliminate diesel generators?
On high-irradiance islands with sufficient solar and energy storage capacity, diesel use can be significantly reduced, but most projects retain diesel or gas as backup for extreme weather, with a typical diesel replacement rate of 60–80%.
How is uninterrupted power for critical loads ensured in off-grid conditions?
Millisecond-level grid-connected/off-grid switching is achieved via a static transfer switch (STS), with the BESS providing black start and frequency regulation support.
What capacity does VGID POWER typically build for island microgrids?
Modular configurations range from a few hundred kW for villages or base stations to several MW for resort islands, determined by load and resource assessment.
How long does deployment of an island project usually take?
Standard modular solutions assemble quickly on site and typically enter operation within weeks to months, while remote EMS reduces the need for long-term on-site O&M.
