Economical Operation and Control Methods of Diesel Generators and Battery Energy Storage Hybrid Power Systems

The hybrid system integrates two or more energy sources into a comprehensive unit for power generation. This system is increasingly gaining popularity as an independent power system, especially in drilling systems where diesel generators serve as the primary energy source. Energy storage-diesel generator systems are among the preferred solutions for both new installations and existing equipment upgrades. Hybrid power systems offer a clean and reliable power supply, proving to be more cost-effective than a singular diesel generator system. Feasibility assessments of existing energy storage-diesel generator hybrid power systems were conducted using optimal generator power point analysis. A method involving the maximization of the initial start-up generator set output, coupled with the average load sharing by diesel generators, was compared. This approach aims to meet electricity demand while minimizing diesel system fuel consumption. In comparison to strategies focusing on minimizing fuel consumption and minimizing diesel generator set control, the former not only achieves lower fuel consumption but also reduces the requirements for energy storage capacity. The results indicate that integrating energy storage systems with diesel generators can lead to significant cost savings in diesel fuel and energy storage capacity while meeting the operational requirements effectively.