ANALYSIS OF PERFORMANCE COEFFICIENTS IN MAXIMUM ELECTRICAL POWER EXTRACTION FROM STAND-ALONE WIND ENERGY CONVERSION SYSTEM

Year 2022, Volume: 10 Issue: 4, 1048 - 1060, 03.12.2022

Emre Hasan Dursun

https://doi.org/10.36306/konjes.1168457

Abstract

Increasing performance and improving efficiency in maximum power extraction from Wind Energy Conversion Systems (WECS) is a quite important research topic. Today, in the large-scale WECS, it is widely aimed to extract the maximum mechanical power from the wind turbine using the Maximum Power Point Tracking (MPPT) unit. Similarly, it can also be targeted to achieve maximum mechanical power in small-scale WECS applications. However, losses occur in structural subsystems and electrical subunits located in WECS. Due to these losses, the overall system efficiency decreases and the characteristic of the system is also affected. The operation of these systems can also be performed via maximum electrical output power extraction, which is one of the most up-to-date ideas. Thus, the overall WECS rather than the wind turbine can be optimally controlled. Eventually, maximum electrical power tracking (MEPT) based designs can provide higher power extraction with higher efficiency than MPPT-based ones. In this paper, considering the system operating concepts with MPPT and MEPT for a stand-alone Permanent Magnet Synchronous Generator (PMSG) based WECS, the changes in performance coefficients at defined focus points in terms of system efficiency are evaluated. Technical and theoretical comparative analyzes are also made for each specific wind speed between 8m/s and 12m/s.

Keywords

Maximum Electrical Power Tracking (MEPT), Maximum Power Point Tracking (MPPT), Performance Coefficients, Permanent-Magnet Synchronous Generator (PMSG), Wind Energy Conversion System (WECS)

Şebeke-Bağlantısız Rüzgar Enerjisi Dönüşüm Sisteminden Maksimum Elektriksel Güç Eldesinde Performans Katsayılarının Analizi

Abstract

Rüzgar Enerjisi Dönüşüm Sistemleri (WECS)’nden maksimum güç yakalanmasında performansın artırılması ve enerji verimliliğinin iyileştirilmesi oldukça önemli bir araştırma konusudur. Günümüzde büyük-ölçekli WECS’lerde Maksimum Güç Noktası Takibi (MPPT) birimi kullanılarak rüzgar türbininden maksimum mekanik gücün elde edilmesi yaygın olarak amaçlanmaktadır. Benzerce küçük-ölçekli WECS uygulamalarında da maksimum mekanik güce ulaşmak amaçlanabilir. Ancak WECS’de yer alan yapısal alt sistemler ve elektriksel alt birimlerde kayıplar meydana gelir. Bu kayıplardan dolayı tüm sistemin verimi düşer ve sistemin karakteristiği de ayrıca etkilenir. En güncel fikirlerden biri olan maksimum elektriksel çıkış gücünün yakalanması ile de bu sistemlerin çalışması gerçekleştirilebilmektedir. Böylece, rüzgar türbininden ziyade WECS’in tamamı optimal olarak kontrol edilebilir. Nihai olarak da Maksimum Elektriksel Güç Takibi (MEPT)’li tasarımlar MPPT’li tasarımlarından daha yüksek verimlilik ile daha yüksek gücün elde edilmesini sağlayabilmektedir. Bu çalışmada, şebeke bağlantısız Kalıcı Mıknatıslı Senkron Generatör (PMSG) temelli WECS için MPPT’li ve MEPT’li sistem çalışma konseptleri düşünülerek, sistem verimliliği açısından belirli odak noktalarındaki performans katsayılarının değişimleri değerlendirilmektedir. Ayrıca 8m/s ve 12m/s arasında her bir belirli rüzgar hızı için de teknik ve teorik olarak karşılaştırmalı analizler yapılmaktadır.

Keywords

Maksimum Elektriksel Güç Takibi, Maksimum Güç Noktası İzleme, Performans Katsayıları, Kalıcı Mıknatıslı Senkron Generator, Rüzgar Enerjisi Dönüşüm Sistemleri

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