Encoderless Vector Control of PMSG for wind turbine applications
Author
Andreea, Cimpoeru
Term
4. term
Education
Publication year
2010
Submitted on
2010-06-02
Pages
62
Abstract
Den voksende interesse for vindmøller og den hurtige udvikling inden for powerelektronik får producenter til at søge mere egnede og billigere teknologier. Permanentmagnet-synkrongeneratorer (PMSG) bliver stadig mere populære end induktionsmaskiner i vindmøller på grund af højere effekt pr. volumen, faldende magnetpriser og højere virkningsgrad. Formålet med dette projekt er at finde en løsning, der undgår brugen af en akselmonteret sensor på en overflademonteret permanentmagnetgenerator i vindmølleapplikationer. Styringsstrategien er Field Oriented Control (FOC), som regulerer generatorens strømme for præcist at styre moment og hastighed. Først blev FOC implementeret og valideret i Matlab/Simulink med målt rotorhastighed og -position (med sensor). Derefter blev metoder til at estimere rotorposition ud fra elektriske signaler undersøgt (sensorløst), og den valgte metode blev valideret. I et dSpace-laboratoriesetup fungerede FOC med sensor som forventet. Den sensorløse algoritme fungerede i simuleringer, men kunne ikke implementeres i laboratoriet.
Growing interest in wind turbines and rapid progress in power electronics are pushing manufacturers to seek effective, low-cost solutions. Permanent magnet synchronous generators (PMSGs) are increasingly favored over induction machines because they offer a higher power-to-volume ratio, lower magnet costs, and improved efficiency. This project aims to avoid using a shaft-mounted sensor on a surface-mounted permanent magnet generator in wind turbine applications. The control strategy is Field Oriented Control (FOC), which regulates generator currents to precisely control torque and speed. First, FOC was implemented and validated in Matlab/Simulink with measured rotor speed and position (sensored). Next, we investigated methods to estimate rotor position from electrical signals (sensorless), and validated the chosen approach. In a dSpace laboratory setup, the sensored FOC worked as intended. The sensorless algorithm performed well in simulations but could not be implemented in the lab.
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