Adaptive PI Control with improved feedback for DFIG Systems

Dr.Manoj Nigam Hod,Department of Electrical Engineering
Kalinga University Raipur

Wind power systems use doubly fed induction generators because they could ensure variable rotation and operate above the synchronous value. When a wind turbine is run faster than its rated speed, DFIG keeps the mechanism safe. In this work, a PI controller scheme will be used to improve the behaviour of a DFIG.

As the demand of electricity increases the concerns about environmental protection grow due to the decline in fossil fuel use and rising pollution there is a heightened interest in sustainable development. This has led to a greater emphasis on utilizing renewable energy sources, which are becoming increasingly crucial for generating electrical power. When compared to all other renewable energy sources, wind energy systems are among the most affordable options [1].

Due to DFIG’s numerous advantages—such as its capacity to run in multiple speed modes, maintain nearly constant frequency, and reduce mechanical stresses—the majority of generating plants have recently adopted it [3, 4]. Use of double fed induction generator to generate additional power [5].
WECS are most common Renewable source of power generation technology found in most countries [6]. Both synchronous and induction generators were used in wind energy generation systems in the past. DFIG is a fantastic replacement for unpredictable and fluctuating wind speed [10].The foundational wind generation system for the double fed induction generator is illustrated in the figure 1[7-8]. A DFIG is made up of a conversion system, which is a PWM voltage source converter with IGBT switching, and a wound rotor type induction generator. The conversion system is capable of converting both DC to AC and AC to DC. Stator winding that is directly connected to the grid and runs at a steady frequency of 50 Hz.

Fig. DFIG created WECS scheme [2]

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