Control of VSI in Microgrid Using Improved Particle Swarm Optimization

A real-time fine-tuning approach is used in this study to offer an optimum power control strategy for microgrid operation. The main theme of the research is to increase the quality of the microgrid supply, which includes Distributed Generation (DG) units. Voltage and frequency management as well as power sharing are critical performance metrics to examine as the system transitions from grid-connected to islanding operational mode which results in variations of load conditions. There are two conventional DG units linked in parallel to create a microgrid. Inner current and outer power control loops are formed by a reference dq frame and standard Proportional Integral (PI) controller. The power quality control includes active-reactive power control and voltage frequency (VF) strategy are the most common methods used by the power controller. Power control settings may be fine-tuned in real time using the intelligent search technique named Improved Particle Swarm Optimization (IPSO). To ensure maximum power export, the second DG unit is only activated when the voltage and frequency of microgrid are stable, while the first DG unit is activated when the microgrid's load changes. The findings divulge that the proposed controller provides an outstanding response to meet the benchmarks of Power Quality (PQ) improvement and verify the rationality of the projected control strategy.