Sensitivity Analysis to Grid Line Impedance for Grid Characterization and Stability Assessment Investigations

Since the massive integration of inverter-based resources in the distribution grid especially for residential applications, power quality, and grid stability became two of the most important issues of the electrical system. This paper deals with the grid line impedance impact on these emerging challenges, and their determination complexity and cost. The presented work analyses the impact of the grid impedance parameters uncertainty through a sensitivity study. As a result of this theoretical development, different sensitivity coefficients are obtained to evaluate grid impedance parameters variation effect on the voltage RMS value, the short-circuit ratio, and the network hosting capacity, for different power exchange scenarios in a 15 kVA low voltage distribution line. Simulation results carried out with Matlab software are given to illustrate this sensitivity analysis.