Abstract
Wind is one of the most develop renewable energy to help human meet the electricity needs as availability is abundant. Instrument which can be used to convert wind energy into electrical energy is an induction generator. In this final project will discuss about the operation of the wind turbine with induction generator controlled using back to back voltage source inverter with grid connected system low voltage 380 V. Switching of back to back voltage source inverter was designed in average model. In back to back voltage source inverter, there are two converters that are machine side converter and grid side converter. Machine side converter has function to regulate the voltage and frequency of generator and turbine speed in order to the wind turbine can generate maximum power at any wind speed with method volt / hetrz constant control. Grid side converter has function to adjust the DC voltage keep be contant by synchronizing the phase angle between the converter output and grid using current controlled voltage source inverter method. The simulation results showed that wind turbine always generated the maximum power at any wind speed. Voltage and frequency of Generator is stable and directly proportional to the wind speed and the dc link voltage is always constant so the power flow can bidirectional. Therefore, back-to-back voltage source inverter is suitable for controlling wind turbine using an induction generator.
Highlights
PENDAHULUANDEWASA ini, banyak terdapat perusakan lingkungan yang disebabkan oleh bahan bakar fosil.
Cp adalah perbandingan antara daya aktual yang dihasilkan dari turbin angin dengan daya energi angin.
Dimana ( ) adalah fungsi koefisien daya, adalah tip speed ratio (TSR), dan adalah pitch angle.
Summary
DEWASA ini, banyak terdapat perusakan lingkungan yang disebabkan oleh bahan bakar fosil. Cp adalah perbandingan antara daya aktual yang dihasilkan dari turbin angin dengan daya energi angin. Dimana ( ) adalah fungsi koefisien daya, adalah tip speed ratio (TSR), dan adalah pitch angle. Fungsi koefisien daya, ( ) tergantung pada dua faktor yaitu Tip Speed Ratio (TSR) dan pitch angle. Tip Speed Ratio (TSR) merupakan perbandingan antara putaran linier dari rotor turbin dengan kecepatan angin. Turbin angin juga memiliki kurva karakteristik daya yang bergantung pada kecepatan angin dan pitch angle. Pada nilai pitch angle yang tetap (fixed pitch), pada gambar 2 berikut adalah kurva karakteristik daya turbin angin terhadap putaran rotornya. Hubungan antar daya dan kecepatan angin sangat penting untuk kontrol maximum power point tracking pada turbin angin. Kurva diatas menunjukkan karakteristik daya yang dapat dihasilkan oleh turbin angin pada kecepatan angin yang berbeda - beda
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