Journal article

Stability and bifurcations in low inertia PV rich power networks

Vishnu A Vinaya Mohanan, Iven MY Mareels, Robin J Evans, Anthony B Morton, Ramachandra Rao Kolluri

IET Generation Transmission & Distribution | INST ENGINEERING TECHNOLOGY-IET | Published : 2020

Abstract

The present trend of inserting increasingly more solar photovoltaic (PV) sources into the electricity grid leads to a significant reduction in mechanical inertia. Inertia represents energy reserve in the grid, that inherently and instantaneously supports frequency stability. Therefore, recent studies have re-examined the frequency stability of the grid. Most of these consider scenarios where the participation from grid-following inverters remains relatively low. More importantly, these studies include an infinite bus in their analyses. The infinite bus acts as a very stiff voltage source which has a significantly stabilising influence, the more so as all control refers back to the infinite b..

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