Performance comparison of boost and super-lift Luo converters in solar energy systems using fuzzy logic-based MPPT control

Öz

This study implements a fuzzy logic-based control mechanism integrated with a super-lift Luo converter to achieve maximum power point tracking (MPPT) in solar energy systems. A comparative analysis of two distinct converter topologies, Boost and Super-lift Luo - an approach not commonly found in similar studies - and constitutes an original component of our research, has been conducted in the context of a DC-DC converter block within the control system. A fuzzy logic controller has been developed as the MPPT algorithm for both systems, utilizing identical solar panel conditions. The super-lift Luo converter has roughly 4% greater efficiency than the conventional boost converter, offering enhanced voltage gain and reduced input current. Furthermore, it has been established that the system utilizing the super-lift Luo converter is better suited for high-power loads and industrial applications. The stability of both systems was verified under sudden changes in environmental parameters, demonstrating their ability to maintain the maximum power point without oscillations or instability. The engineered controller configuration has enabled both converters to achieve steady output values and function at the maximum power point without overshooting. Moreover, additional research was conducted under diverse irradiance and temperature conditions and at varied load levels, to assess system robustness and dynamic response. These investigations also highlighted the suitability of fuzzy logic control for real-time embedded PV applications, due to its low computational burden and strong adaptability to nonlinear behaviours. The results obtained distinctly demonstrate the influence of converter type and control methodology on system performance.

Anahtar Kelimeler

• Fuzzy logic
• Super-lift Luo
• Solar energy systems
• MPPT

Bulanık mantık tabanlı MPPT kontrolü kullanan güneş enerjisi sistemlerinde yükselten ve süper-lift Luo dönüştürücülerin performans karşılaştırması

Öz

Bu çalışmada, güneş enerjisi sistemlerinde maksimum güç noktası takibi (MPPT) elde etmek için süper-lift Luo dönüştürücü ile entegre edilmiş bulanık mantık tabanlı bir kontrol mekanizması uygulanmaktadır. Benzer çalışmalarda yaygın olarak bulunmayan bir yaklaşım olan ve araştırmamızın orijinal bir bileşenini oluşturan iki farklı dönüştürücü topolojisi olan Yükselten ve Süper-lift Luo'nun karşılaştırmalı bir analizi, kontrol sistemi içindeki bir DC-DC dönüştürücü bloğu bağlamında gerçekleştirilmiştir. Her iki sistem için MPPT algoritması olarak, aynı güneş paneli koşullarını kullanan bir bulanık mantık denetleyicisi geliştirilmiştir. Çalışmada süper-lift Luo dönüştürücü, geleneksel yükselten dönüştürücüye göre yaklaşık %4 daha fazla verimliliğe sahiptir ve gelişmiş voltaj kazancı ve azaltılmış giriş akımı sunmaktadır. Ayrıca, süper-lift Luo dönüştürücü kullanan sistemin yüksek güçlü yükler ve endüstriyel uygulamalar için daha uygun olduğu tespit edilmiştir. Her iki sistemin kararlılığı, çevresel parametrelerdeki ani değişiklikler altında doğrulanmış ve salınım veya kararsızlık olmadan maksimum güç noktasını koruma yeteneklerini göstermiştir. Tasarlanan kontrolör konfigürasyonu, her iki dönüştürücünün de sabit çıkış değerleri elde etmesini ve aşım olmadan maksimum güç noktasında çalışmasını sağlamıştır. Ayrıca, sistemin sağlamlığını ve dinamik tepkisini değerlendirmek için farklı ışınım ve sıcaklık koşulları altında ve çeşitli yük seviyelerinde ek araştırmalar yapılmıştır. Bu araştırmalar aynı zamanda bulanık mantık kontrolcünün uygunluğunu da vurgulamıştır.

Anahtar Kelimeler

• Bulanık mantık
• Süper-lift Luo
• Güneş enerji sistemleri
• MPPT

Kaynakça

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