Fuzzy Logic based Voltage Stability Assessment in Smart Grid Environment
DOI:
https://doi.org/10.46610/JoFSFLD.2025.v02i03.005Keywords:
Fuzzy Logic, Load Change, Smart Grid, Voltage Deviation, Voltage Stability Assessment, Voltage Stability IndexAbstract
Voltage stability has become a major operational concern in modern power systems due to continuous load growth, renewable energy penetration, and the evolution of smart grids. Conventional voltage stability assessment techniques often require accurate system models and high computational effort, which limits their applicability for online monitoring. This paper presents a simple and computationally efficient fuzzy logic based voltage stability assessment method using voltage deviation and load change as input variables to estimate a Voltage Stability Index (VSI). The proposed approach imitates human decision-making capability and effectively handles system uncertainties. MATLAB-based simulation results demonstrate that the fuzzy logic method provides smoother and more reliable voltage stability assessment compared with conventional threshold-based techniques. The simplicity and fast response of the proposed model make it suitable for real-time smart grid applications.
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