Induction Generator with Direct Control and a Limited Number of Measurements on the Side of the Converter Connected to the Power Grid

Andrzej Bogdan Kasprowicz (), Oleksandr Husev and Ryszard Strzelecki ()
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Andrzej Bogdan Kasprowicz: Faculty of Electrical Engineering, Gdynia Maritime University, 81-225 Gdynia, Poland
Oleksandr Husev: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Ryszard Strzelecki: Faculty of Electrical and Control Engineering, Gdańsk University of Technology, 80-233 Gdańsk, Poland

Energies, 2022, vol. 16, issue 1, 1-23

Abstract: The article presents an induction generator connected to the power grid using the AC/DC/AC converter and LCL coupling filter. Three-level inverters were used in the converter, both from the generator side and the power grid side. The algorithm realizing Pulse Width Modulation (PWM) in inverters has been simplified to the maximum. Control of the induction generator was based on the Direct Field-Oriented Control (DFOC) method. At the same time, voltage control has been used for this solution. The MPPT algorithm has been extended to include the variable pitch range of wind turbine blades. The active voltage balancing circuit has been used in the inverter DC voltage circuit. In the control system of the grid converter with an LCL filter, the number of measurements was limited to the measurement of power grid currents and voltages. Synchronization of control from the power grid side is ensured by the use of a PLL loop with the system of preliminary suppression of undesired harmonics.

Keywords: induction generator; Direct Field-Oriented Control (DFOC); three-level inverter; Sinusoidal Pulse Width Modulator (SPWM); Maximum Power Point Tracking (MPPT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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