Abstract
This work assesses the impact of the system inertia reduction on the frequency quality of an independent microgrid composed of solar and gas engine generators, and utilized to supply energy to small buildings such as residences and offices. The imbalance between supply and demand can lead to variations in the system frequency that may affect the performance of electric machines. Rotating machines acts as buffers for frequency variations. With lower inertia in the system the delivered or absorbed energy decreases and the buffering effect during frequency variation is reduced. This study is performed by modifying the proportion of solar generation and system inertia, and by applying a strong load change in the system to represent a pattern of a load change present in these types of buildings. Results for the different levels of inertia are compared and methods to deal with this issue are proposed.
