Investigation of Vector Control Applications for Asynchronous Machines Using Online Parameter Estimation Methods

Öz

Two different methods are used in dynamic model vector control applications of asynchronous machines. The first of these methods is to use the derivative information of the state variables based on the system observability principle. The second is the use of instantaneous active and reactive power measurement results as a new method. The classical equivalent circuit model is used in steady-state studies of parameter estimation methods. In dynamic systems, methods based on nonlinear minimization of the cost function, different initial values, and giving more precise estimation results are used. In this study, the dynamic system structure is set up as the square sum of the difference between parameter estimate values. Different parameter estimation methods were used for asynchronous machine models, and test results under no load and full load were examined. The impedance measurement results in parameter estimation methods were compared with the measurement results obtained from the model. It has been shown that the test results performed in real time are very close to the offline and nonlinear parameter estimation values and their accuracy has been proven.

Anahtar Kelimeler

• Asynchronous Machine
• Vector Control
• Dynamic Model
• Parameter Estimation Methods

Asenkron Makineler için Çevrimiçi Parametre Tahmin Metotları Kullanılarak Vektör Kontrol Uygulamalarının İncelenmesi

Öz

Asenkron makinaların dinamik model vektör kontrol uygulamalarında iki farklı yöntem kullanılmaktadır. Bu yöntemlerden ilki sistem gözlenebilirlik ilkesine dayanan durum değişkenlerine ait türev bilgilerinin kullanılmasıdır.İkincisi ise yeni bir yöntem olarak önerilen aktif ve reaktif güç ölçüm sonuçlarının anlık olarak paylaşılmasıdır. Parametre tahmin yöntemlerinin kararlı durum çalışmalarında klasik eşdeğer devre modelikullanılmaktadır. Dinamik sistemlerde ise,maliyet fonksiyonunun doğrusal olmayan minimizasyonuna dayanan, başlangıç değerleri birbirinden farklı olan ve daha kesin tahmin sonuçlarıveren yöntemler kullanılmaktadır. Bu çalışmada, dinamik sistem yapısı parametre tahmin değerleri arasındaki farkın karesel toplamı olacak şekilde kurulmuştur. Asenkron makine modelleri için farklı parametre tahmin yöntemleri kullanılmış, yüksüz ve tam yük altındaki testsonuçları incelenmiştir. Empedans ölçümsonuçları ile, modelden elde edilen ölçüm sonuçları karşılaştırılmıştır. Gerçek zamanlı gerçekleştirilen deney sonuçlarının çevrimdışı olarak gerçekleştirilen ve doğrusal olmayan parametre tahmin değerlerineçok yakın oldukları gösterilmiş ve doğrulukları ispatlanmıştır.

Anahtar Kelimeler

• Asenkron Makine
• Vektör Kontrolü
• Dinamik Model
• Parametre Tahmin Metotları

Kaynakça

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