388KWp, on-grid system with fuel saver
The implemented power-generation project for Fattah Generators, located in Tripoli – Abi Samra, consists of a on-grid solar photovoltaic (PV) system integrated with synchronized diesel generator sets. The system is designed to reduce fuel consumption, increase operational efficiency, and ensure stable power supply under varying load conditions.
The solar PV array is composed of 670 LONGi monocrystalline photovoltaic modules, each rated at 580 Wp, yielding a total installed DC capacity of approximately 388.6 kWp. The array is electrically configured to optimize operating voltage and current parameters according to inverter specifications, ensuring high energy yield under regional irradiance and temperature conditions.
The PV modules are interfaced with the AC network through four grid-tied inverters:
Two Sungrow inverters, each rated at 125 kW AC, providing high-efficiency conversion with advanced MPPT algorithms and rapid response to irradiance variations.
Two additional grid-tied inverters, each rated at 50 kW AC, contributing to overall system redundancy and expanded conversion capacity.
Combined, the inverter group provides 350 kW of AC output capacity, enabling substantial utilization of solar energy during peak production hours.
In parallel with the solar subsystem, the facility’s two diesel generators have been upgraded to DEIF AGC-150 advanced generator controllers. These controllers enable full synchronization between the generators and support parallel operation when load demand increases beyond the capacity of a single unit. The AGC-150 system coordinates generator frequency, voltage, and phase alignment to achieve stable and seamless load sharing.
A critical functional advantage of the DEIF control architecture is its fuel-saving mode, which intelligently prioritizes solar PV production. As inverter output increases, the AGC-150 reduces the generator load point, minimizing diesel fuel consumption while maintaining adequate spinning reserve. When solar energy is abundant, the diesel generators operate at optimized efficiency, and in some cases, only one generator is required, depending on instantaneous load demand.
Through this hybrid configuration, the system achieves:
Reduced diesel consumption,
Lower operational costs,
Increased system reliability, and
Enhanced power-quality stability for the facility.
This integrated solar-diesel solution demonstrates an advanced and scalable approach to distributed power generation, suitable for industrial and commercial applications in regions with intermittent grid availability.
