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In this paper, the impact of stochastic load and renewable generationuncertainty on the dynamic voltage stability margin is studied. Stochastictrajectories describing the uncertainty of load, wind and solar generation havebeen incorporated in the power system model as a set of StochasticDifferential-Algebraic Equations (SDAEs). A systematic study of Monte Carlodynamic simulations on the IEEE 39-Bus system has been conducted to compute thestochastic load margin with all dynamic components active. Numerical resultsshow that the uncertainty of both demand and generation may lead to a decreaseon the size of the dynamic voltage stability margin, yet the variability ofrenewable generators may play a more significant role. Given that theintegration of renewable energy will continue growing, it is of paramountimportance to apply stochastic and dynamic approaches in the voltage stabilitystudy.

The Effect of the Uncertainty of Load and Renewable Generation on the Dynamic Voltage Stability Margin