In a significant advancement for the oil extraction industry, researchers have unveiled insights into improving the efficiency and stability of sucker-rod pump units (SRPUs) through the use of variable frequency drives (VFDs). Conducted by M. S. Ershov from the Gubkin Russian State University of Oil and Gas, this study addresses a critical challenge faced by oil producers: the instability of pump operations during voltage dips in electrical networks. These dips are common in the extensive and often unpredictable power supplies that serve oil fields, leading to operational inefficiencies and equipment wear.
“By enhancing the energy and technological efficiency of SRPUs, we can significantly reduce operational costs and extend the lifespan of critical equipment,” Ershov stated. The research highlights that insufficient balancing of the SRPU can lead to periods where the motor unexpectedly operates in generator mode, a scenario that can cause voltage levels in the VFD’s DC link to exceed safe limits, resulting in shutdowns. This not only disrupts oil production but also incurs financial losses.
To tackle these issues, the research team developed a comprehensive model of the “power grid – variable frequency SRPU drive” system using Matlab Simulink. This model allowed them to simulate various operational scenarios and analyze the effects of voltage dips on the system. Their experiments revealed effective methods for mitigating the adverse impacts of generator mode and short-term voltage fluctuations.
One of the key findings of the research is the potential of integrating an uninterruptible power supply system, specifically utilizing battery energy storage, to maintain continuous operations during voltage dips. “Our analysis indicates that implementing battery storage can prevent operational interruptions, ensuring that oil production remains stable even in the face of electrical disturbances,” Ershov explained. This innovation could lead to more reliable and efficient oil extraction processes, ultimately benefiting the commercial sector by reducing downtime and enhancing productivity.
The implications of this research extend beyond immediate operational improvements. As the energy sector continues to grapple with the challenges posed by aging infrastructure and fluctuating power supplies, the insights gained from Ershov’s study could pave the way for more robust and resilient energy systems. The ability to effectively manage voltage dips and enhance the stability of SRPUs could lead to a paradigm shift in how oil extraction is approached, potentially setting new standards for efficiency and reliability.
Published in ‘Горные науки и технологии’ (translated as ‘Mining Science and Technology’), this research not only contributes valuable knowledge to the field but also underscores the importance of innovation in addressing the pressing challenges of modern energy production. For more information about the research and its implications, you can visit Gubkin Russian State University of Oil and Gas.
