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All Journal ASEAN Journal of Systems Engineering JURNAL NASIONAL TEKNIK ELEKTRO
Anisa Harumwidiah
Politeknik 17 Agustus 1945 Surabaya
Electrical & Electronics Engineering Engineering

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MODELING AND ANALYSIS OF AC-AC SOFT STARTER FOR INDUCTION MOTOR BASED ON THYRISTOR AND IGBT Anisa Harumwidiah; Adi Kurniawan
ASEAN Journal of Systems Engineering Vol 3, No 2 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (903.774 KB)

Abstract

Motor Starting on large capacity induction motor using direct on-line starting (DOL) method may cause a problem for system. It is due to motor start-up current that can be up to eight times of the nominal current. Soft starter is an induction motor starting method based on power electronic that can significantly decrease motor starting current, resulting in reduced fuel consumption. In this research, a comparison between DOL starting method and two soft starter methods based on thyristor and Insulated Gate Bipolar Transistor (IGBT) is performed. The results show that thyristor based soft starter method with firing angle 90˚ can reduce input voltage from 220 V to 165 V so that the maximum starting current down from 633 A to 265 A. In the same voltage value, IGBT can reduce maximum starting current to only 100 A
Simulasi Sistem Pembangkit Listrik Tenaga Angin Menggunakan Doubly Fed Induction Generator (DFIG) dengan Back-To-Back Converter Anisa Harumwidiah; Adi Kurniawan
JURNAL NASIONAL TEKNIK ELEKTRO Vol 5 No 2: Juli 2016
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (716.287 KB) | DOI: 10.25077/jnte.v5n2.269.2016

Abstract

Wind turbine is one of the solutions to overcome the decreasing amount of fossil fuel. One type of generator which can be used on wind turbine application is Doubly Fed Induction Generator (DFIG). The AC current is supplied from both stator winding which connected directly to the grid and rotor winding which connected to the grid through back-to-back power electronic converter. This paper provides simulation of wind turbine using DFIG connected to the grid through back-to-back converter. The back-to-back converter is operated in order to control the rotor speed of DFIG, so that the DFIG can generate maximum power and maintain constant voltage on DC link capacitor. The system is equipped with Maximum Power Point Tracking (MPPT) method to generate maximum power on various wind speed condition. The simulation results show that the control system has high accuracy, proven with error value under 1% on various wind speed condition.Keywords : Doubly Fed Induction Generator (DFIG), Back-to-back Converter, and renewable energyAbstrak— Turbin angin merupakan salah satu solusi untuk mengatasi sumber energi fosil yang jumlahnya semakin terbatas. Salah satu generator yang digunakan untuk turbin angin adalah Doubly Fed Induction Generator (DFIG). Arus AC yang disuplai berasal dari belitan stator yang terhubung langsung dengan jaringan dan belitan rotor yang juga terhubung dengan jaringan melalui power electronic converter dengan jenis back-to-back converter. Pada penelitian ini dilakukan simulasi pembangkit listrik tenaga angin menggunakan DFIG yang dihubungkan ke jaringan melalui back-to-back converter. Konverter ini dioperasikan dengan tujuan mengontrol kecepatan rotor DFIG agar menghasilkan daya maksimum dan menjaga nilai tegangan kapasitor DC tetap konstan. Sistem dilengkapi dengan metode Maximum Power Point Tracking (MPPT) untuk menghasilkan daya maksimum pada kecepatan angin yang berbeda-beda. Hasil simulasi untuk pengujian akurasi rangkaian kontrol menunjukkan nilai akurasi yang tinggi dibuktikan dengan nilai error dibawah 1% untuk semua kondisi kecepatan angin.Kata Kunci : Doubly Fed Induction Generator (DFIG), Back-to-back Converter, dan energi terbarukan.
Co-Authors Adi Kurniawan Adi Kurniawan