Local Aggregation of PMU Measurements in a Low-Inertia Distribution Power System

Abstract

The ever-increasing installation of renewable energy sources is rapidly transforming the aspect of modern power grids, especially at distribution level where the presence of photovoltaic power plants and battery storage systems is significant. Phasor Measurement Units (PMUs) are well-known devices that are proven to be particularly effective in this context. However, it is more and more essential to assess the reliability of these measurements, especially in low-inertia and transient conditions. Therefore, this paper presents a study on the feasibility of aggregating PMU-based measurements performed in different nodes of a distribution grid. The results indicate the significance of evaluating such quantity for correct control at a local level, mainly where an extensive installation of renewables is present.