1. Wind turbine technology can be divided into the systems with and without power electronic technology....

  

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1. Wind turbine technology can be divided into the systems with and without power electronic technology. The system without power electronics technology use induction generator. FIGURE Q1 shows a wind turbine system with full-scale power electronics. The system uses a permanent magnet synchronous generator to convert the wind turbine power to a variable voltage-variable frequency output that varies with wind speed. Rectifier and inverter are then used to convert the full rated output of the machine to the power that is compatible with the utility system. a. b. Synchronous Generator Rectifier Inverter Utility LONDO Blades & Rotor Gear G FIGURE Q1 Compare and discuss the wind turbine technology without power electronics and with power electronics system in term of their limitation and advantages. [5 marks] Discuss the operation of the system shown in FIGURE Q1 where a three- phase six-pulse rectifier is employed. Show a detailed power electronics topology circuit of the system. Explain on the improvement of the performance in the new system and how it is achieved. [10 marks] ii. EDB3073/EEB3033 Discuss the importance of the dc-link capacitor and design the size of the capacitor to maintain dc voltage of 480 V and the current is 4.8 A. [7 marks] iii. Verify your design in part (ii) by constructing the circuit using MATLAB Simulink. Assume the load side can be represented by a 100 2 resistor. Discuss you result and show the simulated circuit and relevant waveforms with proper labelling. [7 marks] 1. Wind turbine technology can be divided into the systems with and without power electronic technology. The system without power electronics technology use induction generator. FIGURE Q1 shows a wind turbine system with full-scale power electronics. The system uses a permanent magnet synchronous generator to convert the wind turbine power to a variable voltage-variable frequency output that varies with wind speed. Rectifier and inverter are then used to convert the full rated output of the machine to the power that is compatible with the utility system. a. b. Synchronous Generator Rectifier Inverter Utility LONDO Blades & Rotor Gear G FIGURE Q1 Compare and discuss the wind turbine technology without power electronics and with power electronics system in term of their limitation and advantages. [5 marks] Discuss the operation of the system shown in FIGURE Q1 where a three- phase six-pulse rectifier is employed. Show a detailed power electronics topology circuit of the system. Explain on the improvement of the performance in the new system and how it is achieved. [10 marks] ii. EDB3073/EEB3033 Discuss the importance of the dc-link capacitor and design the size of the capacitor to maintain dc voltage of 480 V and the current is 4.8 A. [7 marks] iii. Verify your design in part (ii) by constructing the circuit using MATLAB Simulink. Assume the load side can be represented by a 100 2 resistor. Discuss you result and show the simulated circuit and relevant waveforms with proper labelling. [7 marks]