AUTHORS: Abdelaziz Salah Saidi, Mohammed Ibrahim Y. Al-Rayif

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ABSTRACT: The increasing penetration of load model in distribution systems may significantly affect voltage stability of the systems, particularly during Low Voltage Ride-Through (LVRT) wind turbine. The main objective of this work is to present the impact of different static and dynamic load models, on the LVRT recovery after disturbances. A component and composite loading structures are considered, comprising static, dynamic motor and a composite model. Motor loads are assessed with respect to their mechanical loads. The polynomial load model using load class and load type is investigated thoroughly under various operating conditions. The present paper examines the effect of nonlinear loads as well as different mechanical torque and inertia of induction motor loads on the transient stability and observing the fault recovery performance of the Doubly-Fed Induction Generator (DFIG) wind turbine system. The dynamic impacts between wind turbines (WTs) and motor loads are also examined. The complete system is modeled and simulated using PSAT/MATLAB software environment in such a way that it can be suited for modeling of all types of loads configurations. The LVRT capability is investigated and the results of voltage dip ride-through simulations are presented for both static and dynamic load.

KEYWORDS: Low Voltage Ride-Through, doubly-fed induction generator wind turbine, static load, dynamic load, composite load modeling, transient stability

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