Distribution Grid Phasor Estimation and μPMU Modeling

$\mu\mathrm{PMUs}$ are a promising monitoring device for monitoring and smarting the distribution grid by providing a synchronized phasor measurement of bus voltages and branch phasor currents besides sequence components, frequency, and harmonics content. They are designed with high accuracy level to withstand the distribution grid challenges. Understanding μ PMUs behavior and error sources under different operation conditions are essential to address the desired quality standard. This paper presents a MATLAB/SIMULINK $\mu\mathrm{PMU}$ model, which addressed the analog filter, GPS uncertainty, and off-nominal operation errors and the elimination methods of these errors. The proposed model is tested using a standard input wave with unit step frequency change. Moreover, the model performance is evaluated for unbalanced distribution grid feeders with random load change. The model showed accurate estimation of phasors magnitude, angles, sequence components, frequency, and harmonics content.