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A New Variable-Speed Wind Energy Conversion System Using Permanent-Magnet Synchronous Generator and Z-Source Inverter

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With the growth of wind energy conversion systems (WECSs), various technologies are developed for them. Permanent-magnet synchronous generators (PMSGs) are used by these technologies due to special characteristics of PMSGs such as low weight and volume, high performance, and the elimination of the gearbox. In this paper, a new variable-speed WECS with a PMSG and Z-source inverter is proposed. Characteristics of Z-source inverter are used for maximum power tracking control and delivering power to the grid, simultaneously. Two control methods are proposed for delivering power to the grid: Capacitor voltage control and dc-link voltage control. Operation of system with these methods is compared from the viewpoint of power quality and total switching device power (TSDP). In addition, TSDP, current ripple of inductor, performance, and total harmonic distortion of grid current of proposed system is compared with traditional wind energy system with a boost converter.
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  ELECTRICAL PROJECTS USING MATLAB SIMULINK Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 A New Variable-Speed Wind Energy Conversion System Using Permanent-Magnet Synchronous Generator   and  Z  -Source Inverter ABSTRACT:   With the growth of wind energy conversion systems (WECSs), various technologies are developed for them. Permanent-magnet synchronous generators (PMSGs) are used by these technologies due to special characteristics of PMSGs such as low weight and volume, high  performance, and the elimination of the gearbox. In this paper, a new variable-speed WECS with a PMSG and  Z  -source inverter is proposed. Characteristics of  Z  -source inverter are used for maximum power tracking control and delivering power to the grid, simultaneously. Two control methods are proposed for delivering power to the grid: Capacitor voltage control and dc-link voltage control. Operation of system with these methods is compared from the viewpoint of  power quality and total switching device power (TSDP). In addition, TSDP, current ripple of inductor, performance, and total harmonic distortion of grid current of proposed system is compared with traditional wind energy system with a boost converter. KEYWORDS:   1.   Maximum power point tracking (MPPT) control 2.   Permanent-magnet synchronous generator (PMSG) 3.   Wind energy conversion system (WECS) 4.    Z  -source inverter SOFTWARE:  MATLAB/SIMULINK  ELECTRICAL PROJECTS USING MATLAB SIMULINK Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 BLOCK DIAGRAM:   Fig. 1. Proposed PMSG-bas   ed WECS with  Z  -source inverter. EXPECTED SIMULATION RESULTS: Fig. 2. DC voltage and optimum rotor speed relation: simulated and approximated and calculated (actual).  ELECTRICAL PROJECTS USING MATLAB SIMULINK Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 Fig.   3. Wind speed variation. Fig. 4. PMSG rotor speed (capacitor voltage control).  ELECTRICAL PROJECTS USING MATLAB SIMULINK Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail:   asokatechnologies@gmail.com ,  Website: http://www.asokatechnologies.in 0-9347143789/9949240245 Fig. 5. Maximum mechanic   al power of turbine and the extracted mechanical  power from turbine (capacitor voltage control). Fig. 6. Capacitor voltage (capacitor voltage control).
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