Grid Strength Assessment and Maximum Loadability of a Wind-Dominated Power System Through QV Modal Analysis

With the menace of climate change, a quite vast number of Renewable Energy Sources (RES) is being integrated into the traditional transmission grid. The current trends shows that wind energy is the fastest growing RES. The operation and planning of the existing traditional transmission grid with these large scaled wind farms pose several challenges to the Transmission System Operators (TSO), and planners. A systematic approach is needed to integrate them into the grid. This paper aims to present an iterative QV modal analysis to find the strength of each region of the power system and, thus, the maximum loadability of each region. The P-Q method is used to determine the stability boundary of the test system. These methodologies were applied to the well-known IEEE 14 bus system with a large scale wind farm connected to it.