Enhancing the Voltage Quality of Grid-Forming Converters by Using Improved Dead Time Compensation Strategy

Grid-forming converters play a crucial role in providing active grid support capabilities and fault-ride-through capabilities in power systems. The conventional approaches to handle harmonic issues and compensation lag often suffer from limited accuracy. To address these limitations, a novel dead time compensation method for grid-forming converters that are utilizing pulse width modulation (PWM) technology is proposed, which integrates a quasi-resonant controller to effectively mitigate the problems associated with PWM technology. It aims to suppress harmonics and does not require additional hardware or complex algorithms, and is not limited by the modulation method or the dead time setting. The high-precision and adaptive of the proposed strategy are proved by simulation results.