Yenilenebilir Enerji Kaynaklarına Sahip Bir Evin Talep Karakteristiğine Uygun Bir İnverter Tasarımının İncelenmesi

Öz

Dünyamızın artan enerji gereksinimi yenilenebilir enerji kaynaklarına olan ilgiyi artırmıştır. Özellikle, güneş ve rüzgar enerjili güç sistemleri şebekeden bağımsız/şebeke bağlantılı evsel uygulamalarda yaygın olarak kullanılmaya başlanmıştır. Yenilenebilir enerji kaynaklarına sahip bir evde ihtiyaç duyulan sabit genlik ve frekansa sahip AC gerilimin elde edilmesinde bir evirici (inverter) devre kullanılmaktadır. Bir evin elektrik güç kullanımına ait ölçüm verisi incelendiğinde ev elektrik talebinin gün boyunca değişken olduğu ve büyük bir oranda düşük güçlerde kaldığı görülmüştür. Bu yüzden, böyle bir ev için inverter devresinin özellikle düşük güç bölgesindeki verimin iyileştirilmesi gereklidir. Bu çalışmada, inverter devresinde kullanılan LC filtre devresinde bulunan indüktör değerinin yük akımına göre değişken olmasının inverter devresinin verimi üzerine etkisi incelenmiştir. Kullanılan yöntemle inverter devresinden çekilen akımdaki dalgalanmanın düşürülebildiği ve inverter devresinin düşük güçlerdeki veriminin büyük oranda iyileştirilebildiği gösterilmiştir. Daha verimli bir inverter devresi ile yenilenebilir enerji kaynaklarından elde edilen enerji daha etkin bir şekilde kullanılabilecektir. 

Anahtar Kelimeler

• Yenilenebilir enerji,inverter tasarımı,evsel elektrik güç talebi,verim artışı,değişken filtre indüktansı

Analysis of a Power Inverter Design Considering The Demand Characteristics of a House With Renewable Energy Sources

Öz

Increasing energy demand in the world has shifted the interest to renewable energy sources. Specifically, solar and wind power systems for both grid connected and stand-alone homes have become a widespread application. An inverter is used to obtain AC voltage with fixed amplitude and frequency in a renewable energy supplied residential house. When measured residential electrical power demand data is analyzed, it is seen that the demand varies within a wide range during a day and stays at low power levels most of the day. Thus, the light load efficiency of inverter circuit must be improved for residential applications. In this study, the effect of variable inductor use-with reference to the load current- at the inverter LC filter circuit on the inverter light load efficiency is investigated. It is shown that the inverter light load efficiency can be considerably improved due to the reduction of current ripple drawn from the inverter. With more efficient inverter design, the energy from renewable sources can be utilized more efficiently. 

Anahtar Kelimeler

• Renewable energy,inverter design,residential electrical power demand,efficiency improvement,variable filter inductance

Kaynakça

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