A recent study led by Yiyan Sang from the Shanghai University of Electric Power has introduced a novel control strategy for modular multilevel converters (MMCs) that could significantly enhance the stability and reliability of power systems. This research, published in the International Journal of Electrical Power & Energy Systems, addresses the critical challenges faced by grid-following MMCs, particularly during system disturbances such as grid voltage sags and parameter mismatches.
The proposed method, known as passivity-based sliding mode current control (PBSMCC), leverages advanced principles from passivity theory to maintain system stability despite external disruptions. By constructing an energy storage function based on the MMC’s Euler-Lagrange model, the researchers ensure that the system can effectively dissipate disturbances and maintain performance. “The external disturbances would be dissipated rapidly under a designed sliding regime with extra damping terms,” Sang explains, highlighting the robustness of this new control scheme.
One of the key advantages of PBSMCC is its ability to operate effectively across a broad range of conditions, including scenarios with low power factors, which are typically challenging for traditional control methods. The study demonstrates that this innovative approach can overcome the limitations of conventional proportional-integral (PI) control, which often struggles with narrow operating ranges. This breakthrough could lead to more efficient energy management in various sectors, including renewable energy integration, electric vehicles, and smart grid technologies.
The commercial implications of this research are significant. As power systems become increasingly complex, the demand for robust and reliable control mechanisms will grow. Industries that rely on MMC technology for power conversion and distribution can benefit from the enhanced stability offered by PBSMCC, potentially reducing operational downtime and improving the efficiency of energy transmission.
Furthermore, as countries transition to cleaner energy sources, the ability to manage grid disturbances effectively will be crucial for integrating renewable energy sources like wind and solar power. The findings from this study could pave the way for more resilient and adaptable power systems, ultimately contributing to a more sustainable energy future.
In summary, Yiyan Sang’s research presents a promising advancement in the field of electrical power systems. The proposed PBSMCC not only enhances the stability of modular multilevel converters but also opens up new commercial opportunities for industries focused on energy management and renewable integration. This work, published in the International Journal of Electrical Power & Energy Systems, marks a significant step forward in addressing the challenges posed by system disturbances in modern power networks.
