Utilization the Taguchi Method for Simultaneous Optimization of Microgrid Parameters through the Proposed Criterion for Stability of PLL in Network Connected Converters

Phase-locked loop (PLL) is one of the most important components for the performance, control and grid synchronization of network-connected converters. The stability of PLL are affected by different factors (including the network-side and microgrid-side parameters). Similar to the effect of network-side factors, the effect of microgrid components also play an important role in the stability of PLL. The effect of the microgrid-side parameters on the stability of the PLL has not been studied so far. In this paper, using a new proposed stability criterion and with the aim of stability improvement of PLL, the optimized rate of microgrid-side and network-side Parameters is determined. First, the dynamic model of the mentioned microgrid is simulated in MATLAB software. Then, a Taguchi approach is employed in order to determine the optimal sets of microgrid-side and network-side parameters.