Refer to attached project, in which a DSL block definition "PLL DSOGI EMT 3PH" contains this functionality. Along with other phase-locked loop (PLL) topologies, the DSOGI  (double second order generalised integrator) is capable of retrieving a high-quality measurement by tracking the positive sequence signal component only, thus filtering out unwanted signal components (e.g. negative sequence, good harmonic rejection etc.).

The provided model supports EMT-simulation only.