In the rapidly evolving landscape of new power systems, a groundbreaking study published in *Power Construction* (Dianli jianshe) is shedding light on the pivotal role of large-capacity static var generators (SVGs) based on modular multilevel technology. Led by Weimin Ma and his team at the State Grid Economic and Technological Research Institute in Beijing, this research delves into the key technologies and future prospects of these advanced inverters, offering a roadmap for enhancing grid stability and efficiency.
The study highlights the multifaceted capabilities of large-capacity SVGs, which can perform a variety of critical functions, including reactive power compensation, harmonic suppression, and impedance remodeling. These capabilities are essential for supporting the construction of new power systems, particularly those with a high proportion of new energy sources and power electronic equipment. “SVGs are not just a tool for reactive power compensation; they are a cornerstone for ensuring the safe and stable operation of modern grids,” says lead author Weimin Ma.
One of the most compelling aspects of the research is its exploration of the evolutionary relationship between SVGs and modular multilevel converters. By analyzing the quantitative evaluation formula of AC grid strength supported by SVGs, the study provides a comprehensive understanding of how these technologies can bolster grid resilience. The authors also delve into key technologies such as SVG-based multisource line commutation converter (SLCC) technology, active filtering, grid-forming SVG, and energy storage-type SVG, each of which plays a crucial role in the future of power systems.
The implications for the energy sector are profound. Large-capacity SVGs have broad application prospects in areas such as large-scale new energy island exports, weak-system voltage support, and wide-area harmonic suppression. These innovations could revolutionize how we integrate renewable energy sources into the grid, making it more robust and adaptable to the challenges of the 21st century.
However, the research also identifies areas that require further investigation. “Further in-depth research is needed on SVG precharging and black start, as well as on coordinated control among multiple SVGs in isolated new energy systems,” Ma notes. These areas of focus will be critical for unlocking the full potential of SVG technology.
As the energy sector continues to evolve, the insights provided by this study could shape the development of new power systems, ensuring they are more reliable, efficient, and capable of supporting the growing demand for clean energy. The research published in *Power Construction* serves as a beacon for future innovations, guiding the industry toward a more sustainable and resilient energy future.