A recent study published in “Southern Energy Construction” explores the implications of integrating large-scale renewable energy sources, such as wind and solar power, into existing power systems. Led by Yixin Li from the Grid Planning and Research Center at Guangdong Power Grid Corporation, this research addresses a critical challenge as the energy sector aims to meet China’s ambitious carbon neutrality goals by 2060.
As traditional coal-fired synchronous generators are gradually replaced by renewable energy sources, the inertia characteristics of power systems are significantly altered. Inertia is crucial for maintaining the stability of the power grid, especially during disturbances. The research highlights how the influx of new energy sources, which connect to the grid via converter interfaces, leads to a loss of system inertia. This loss can impact the frequency dynamics of the power system, potentially leading to instability.
Li and his team reviewed the inertia equation of motion for conventional power systems and examined the power-frequency dynamic process during the inertia response phase. They qualitatively discussed how the integration of renewable energy affects the system’s overall inertia. The study emphasizes the need for effective evaluation indicators to assess the inertia levels in power grids. According to Li, “The system’s total kinetic energy and inertia constant are essential indicators for evaluating the inertia of the power grid.”
The findings of this research carry significant commercial implications for the energy sector. As the transition to renewable energy accelerates, companies involved in energy generation, grid management, and technology development will need to adapt to the changing dynamics of power systems. This adaptation could present opportunities for innovation in energy storage solutions, advanced grid management technologies, and new business models that prioritize flexibility and resilience in power supply.
Furthermore, the study provides recommendations for improving grid inertia, which could involve investments in energy storage systems or the development of hybrid generation facilities that combine traditional and renewable sources. As the energy landscape evolves, stakeholders in the sector will need to collaborate on strategies that ensure stability and reliability in power delivery while supporting the transition to a low-carbon future.
This research underscores the importance of understanding the interplay between new energy integration and grid stability, highlighting the need for ongoing innovation and adaptation within the energy sector to meet future demands.
