Why Are Gas Engines Well Suited to Island Power Plants?
For islands far from the mainland grid, the challenge is not simply whether electricity is available, but whether power can be generated continuously, reliably, and economically. Conventional diesel generation has relatively high fuel costs, while wind and solar power are affected by weather conditions. Relying on any one energy source alone therefore has inherent limitations.
In this context, an LNG-to-Power gas engine power plant offers a more flexible solution. LNG is delivered to the island by sea, then stored, vaporized, and pressure-regulated before being supplied directly to gas engine generator sets, rapidly converting liquefied natural gas into stable, dispatchable electricity.
Particularly in an isolated grid, gas engines offer modular deployment, rapid starting and stopping, fast load response, and parallel operation of multiple units. They can serve as the primary power source while also operating in coordination with solar PV, wind power, and energy storage systems.
Challenges of Island Power Supply
Mainland grids have many different types of generating units and transmission lines. If one power plant fails, other plants can usually make up the shortfall quickly.
Islands are different.
Many islands rely on independent power systems, commonly known as island grids.
The entire system may have a capacity of only a few dozen megawatts, or even just a few megawatts.
This creates a very practical issue:
The start or stop, failure, or load change of a single generating unit can have a significant impact on the entire island grid.
Hotels, residents, hospitals, ports, desalination facilities, communications infrastructure, and industrial users on an island all create constantly changing demand for electricity each day.
An island power plant must therefore do more than generate electricity; it must also provide strong load-following and regulation capabilities.
How Is LNG Converted into Electricity?
LNG shipping or transshipment -> island receiving terminal -> cryogenic storage -> pressurization and vaporization -> pressure regulation and metering -> gas engine power generation -> power transmission and distribution system -> island loads
1. LNG Reception and Storage
LNG is first transported to the island by ship.
Depending on project scale, the storage solution may use large LNG tanks, small LNG tanks, containerized tanks, or other modular storage systems.
2. LNG Vaporization
LNG cannot be fed directly into a gas engine.
It must first pass through a vaporization system, which converts the cryogenic liquid natural gas into gaseous natural gas.
The gas then undergoes pressure regulation, metering, heating, and safety control so that its pressure, temperature, and flow rate meet the requirements of the gas generator sets.
This process ultimately creates a stable gas supply.
3. Power Generation with Gas Engines
The conditioned natural gas enters the gas engine generator sets and is converted on site into a stable electrical output.
Why Are Gas Engines Especially Well Suited to Island Power Plants?
How Do Kelinyuan Product FeaturesMeet the Core Requirements for an Island's Primary Power Source?
1. Primary Power Supply: Balancing Efficiency and Gas Consumption
Island power plants typically operate continuously for long periods, so generating efficiency and fuel consumption directly determine long-term operating costs.
Kelinyuan gas engine generator sets can achieve an electrical efficiency of up to 42% and a heat rate of no more than 8,990 kJ/kWh, balancing generating efficiency with fuel economy while continuously carrying the island's primary electrical load.
2. Grid Stability: Full-Load Operation and Fast Dynamic Response
Because island grids have relatively low capacity, they are more sensitive to changes in load.
Kelinyuan units can operate stably across the full load range and support a single-step load increase of 50%. When the system experiences a major load change, unit frequency can return to the stable range in approximately 1-5 seconds.
3. Environmental Performance: Adapted to Environmentally Sensitive Island Applications
Many islands are tourist, residential, or ecologically sensitive areas, so power plants must generate cleanly as well as reliably. Kelinyuan units keep NOx emissions below 500 mg/m³, helping meet local environmental requirements and protect island air quality and ecosystems.
4. Long-Term Assurance: From Equipment Supply to Power Plant Operations
From front-end system design and unit installation and commissioning through a 72-hour trial run, Kelinyuan provides end-to-end technical support.
More importantly, service does not end when the project enters operation. Through a remote data monitoring platform, we continuously track unit operating status. We also provide OEM spare parts and professional operation and maintenance services to support stable, long-term power plant operation in the island environment.
Island operating conditions are unique: fuel must be delivered by sea, electrical demand fluctuates significantly between day and night, emissions requirements are stringent, and operation and maintenance response times are long. Together, these factors place greater demands on power plant reliability and flexibility. The combination of modular gas engines and comprehensive solution and service capabilities provide an effective answer to these challenges.
