Methods of Control for Generators that Used in Wind Turbines

Abstract

This paper offers an overview of control in electrical machines. The primary aim of this paper is to determine the optimal control method for most types of electrical machines. First of all, the principle of controlling electrical machines in general has been explained, after that, scalar control and vector control have been studied. Direct and indirect vector control have been studied and compared, in addition to determining the advantages and disadvantages of each of them. This paper has focused on studying the vector control of a Doubly Fed Induction Generator (DFIG), as it is one of the most widely used generators in wind energy. The control of current, power and speed from the rotor side has been studied by building a set of equations that represent the mathematical model of Doubly Fed Induction Generator (DFIG). As for the grid side, the method of regulating the reactive power between Doubly Fed Induction Generator (DFIG), and the grid has been explained. The results are discussed, along with a simplified comparison between scalar and vector control. The paper also includes a simplified comparison between generator types, identifying the advantages and disadvantages of each.

Keywords

• Vector control
• Scalar control
• Doubly Fed Induction Generator
• Synchrounus generator.

Rüzgâr Türbinlerinde Kullanılan Jeneratörler İçin Kontrol Yöntemleri

Abstract

Bu makale, elektrik makinelerinde kontrol konusuna genel bir bakış sunmaktadır. Bu çalışmanın birincil amacı, çoğu elektrik makinesi türü için en uygun kontrol yöntemini belirlemektir. Öncelikle, genel olarak elektrik makinelerinin kontrol prensibi açıklanmış, daha sonra skaler kontrol ve vektör kontrol incelenmiştir. Doğrudan ve dolaylı vektör kontrolü incelenmiş ve karşılaştırılmış, ayrıca her birinin avantaj ve dezavantajları belirlenmiştir. Bu çalışma, rüzgar enerjisinde en yaygın kullanılan jeneratörlerden biri olan Çift Beslemeli Asenkron Jeneratörün (DFIG) vektör kontrolünü incelemeye odaklanmıştır. Rotor tarafından akım, güç ve hız kontrolü, Çift Beslemeli Asenkron Jeneratörün (DFIG) matematiksel modelini temsil eden bir dizi denklem oluşturularak incelenmiştir. Şebeke tarafında ise Çift Beslemeli İndüksiyon Jeneratörü (DFIG) ile şebeke arasındaki reaktif gücü düzenleme yöntemi açıklanmıştır. Sonuçlar, skaler ve vektör kontrolü arasında basitleştirilmiş bir karşılaştırma ile birlikte tartışılmaktadır. Makale ayrıca jeneratör tipleri arasında basitleştirilmiş bir karşılaştırma içermekte ve her birinin avantaj ve dezavantajlarını tanımlamaktadır.

Keywords

• Vektör kontrol
• Skaler kontrol
• Çift beslemeli asenkron jeneratör
• senkron jeneratör

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