REAL TIME CALCULATION OF SHEM ANGLES BY METAHEURISTIC ALGORITHMS FOR VARIABLE FREQUENCY MOTOR DRIVES

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REAL TIME CALCULATION OF SHEM ANGLES BY METAHEURISTIC ALGORITHMS FOR VARIABLE FREQUENCY MOTOR DRIVES.pdf

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2021-9-23

Author

NALÇACI, Gamze

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Harris hawks optimization (HHO) has been used to optimize a voltage source inverter's selective harmonic elimination method (SHEM) for light rail transportation. The primary goal of SHEM's pulse-width modulation strategy is to eliminate low-order harmonics by solving nonlinear equations while maintaining the required magnitude of the fundamental component. When applied to a two-level, three-phase inverter, the HHO algorithm aims to solve the associated nonlinear equations with a high degree of accuracy and probability of convergence, outperforming particle swarm optimization (PSO), grey wolf optimization (GWO), and whale optimization algorithms (WOA). SHEM simulations using MATLAB / Simulink are performed on a 125 kW traction motor drive platform for various SHEM angles in order to compare its performance to SHEM using SPWM and SVM techniques. Experiments conducted on a laboratory-scale physical simulator of a light rail transportation system revealed remarkable findings regarding the effect of the DC link voltage magnitude on the performance of the associated traction motor drive. In light of the various fundamental frequency operations, and the operating DC link voltages, a general assessment of the SHEM has been made in light of its application to a light rail traction motor drive. Additionally, the calculated SHEM switching angles using PSO, WOA, GWO, and HHO in compute unified device architecture (CUDA) are compared on two graphics processing units (GPUs), with the results indicating that HHO calculates faster than the other metaheuristic methods for real-time applications.

Subject Keywords

Gerçek zamanlı hesaplama, metasezgisel algoritmalar, motor sürücüler, seçmeli harmonik eliminasyonu, grafik işleme ünitesi

URI

https://hdl.handle.net/11511/94217

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

G. NALÇACI, “REAL TIME CALCULATION OF SHEM ANGLES BY METAHEURISTIC ALGORITHMS FOR VARIABLE FREQUENCY MOTOR DRIVES,” Ph.D. - Doctoral Program, Middle East Technical University, 2021.