Event-Triggered Secondary Control Strategy of DC Microgrid in Islanded Mode

In recent years, with the introduction and widespread application of distributed generation technology, the importance of microgrids has continued to increase. One of the current research directions is how to improve the control strategies of microgrids. Traditional microgrid control strategies use droop control, which also faces issues of voltage deviation and current equalization deviation. This paper addresses these issues by proposing a distributed secondary control based on event-triggering to compensate for them. Only at the event-triggering moments, the estimated voltage values are calculated to replace the actual values, reducing communication between converters and voltage deviation among converters. This paper validates through simulation that the event-triggered distributed secondary control strategy effectively ensures stable output voltage and reduces the output current deviation problem.