HIL Test Verification of PDPI Control of Induction Generator-Based Multi-Rotor Wind Turbine Systems

Abstract

In this experimental study, a new technique is designed and presented for controlling the rotor side converter of an induction generator (IG) for multi-rotor wind turbine (MRWT) systems. The direct power command (DPC) strategy is used to regulate the reactive and active power (Qs and Ps). DPC is characterized by several drawbacks, the most prominent of which are low durability, low current/power quality, and the use of power estimation. Therefore, a new PDPI (proportional-derivative proportional-integral) regulator is used as a suitable solution to overcome these shortcomings while maintaining simplicity, achieving a rapid dynamic response, and obtaining gains that characterize the DPC. The suggested DPC for controlling the IG inverter of an MRWT system uses two PDPI regulators and pulse width modulation (PWM) to create and generate the pulses necessary to run and regulate the IG inverter. First, the DPC-PDPI-PWM is verified in a MATLAB using different tests, and the characteristics of the DPC-PDPI-PWM is compared to that of DPC under different working conditions for a 1500 kW IG. Second, the validity of the simulated results is verified using the Hardware-in-the loop (HIL) test for the DPC-PDPI-PWM, and dSPACE 1104 is used for this purpose. The results demonstrate the effectiveness of the DPC-PDPI-PWM approach over DPC, as the harmonic distortion of the stream is minimized by 36.66%, 22.68%, and 33.33% in the three proposed tests. Also, the overshoot value of Ps was reduced compared to DPC by ratios estimated at 70.96%, 71.42%, and 70.31% in all tests. DPC-PDPI-PWM also reduces the steady-state error of Qs compared to DPC by 68.33%, 58.82%, 67.90% in all tests performed. The experimental results confirm the numerical results, suggesting that the DPC-PDPI-PWM is a suitable solution in the field of command in the future.