Inverters that Mimic Synchronous Condenser to Improve Voltage Stability in Power System

The increasing shift from traditional energy sources to renewable energy generation has heightened the risk of frequency and voltage instability. This transition may result in serious consequences, such as significant voltage and frequency fluctuations during sudden load changes, power generation interruptions, and grid faults. One potential solution is the deployment of synchronous condensers to mitigate these issues; however, this approach may also increase operational and maintenance costs. To address this limitation, this paper proposes a method that enables renewable energy systems to emulate the sub-transient behavior of synchronous condensers, thereby enhancing local voltage and frequency stability. The proposed approach has been validated through case studies, demonstrating both its effectiveness and practicality.