Şebekeye bağlı yenilenebilir enerji kaynaklı eviriciler için yeni bir akım kontrol stratejisi

Yıl 2020, , 537 - 550, 25.10.2019

Mehmet Emin Meral , Doğan Çelik

https://doi.org/10.17341/gazimmfd.487745

Öz

Dengesiz şebeke gerilimleri pozitif ve negatif sıralı
(PNS) bileşenleri içermektedir. Özelikle, kontrol sinyallerinin üzerindeki
salınımlara sebep olan negatif sıralı bileşenler şebekeye bağlı yenilenebilir
enerji kaynaklı eviricilerin (YEKI) performansını önemli derecede
etkilemektedir. Bu çalışmada, ideal olmayan şebeke gerilim şartlarında şebekeye
bağlı YEKI’ in kontrolü için kullanılan oransal integral (PI) tabanlı ikili
akım kontrolcünün yavaş dinamik tepkisi, kararlı hal hataları ve kompleks
yapısı gibi dezavantajlarının giderilmesi için oransal kompleks integratör
(PCI) tabanlı akım kontrolcüsü önerilmiştir. Aktif-reaktif güç referans sinyali,
PNS bileşenleri ve esnek kontrol parametresine dayanan referans akımlar, tüm kontrol
döngülerinde kullanılmak üzere üretilmiştir. İdeal olmayan şebeke durumlarından
kaynaklanan aktif ve reaktif güç salınımlarının bir biri ile olan ilişkileri
ayrıntılı bir şekilde incelenip kontrol edilebilirlikleri esnek kontrol
parametresi ile sağlanmıştır. Çalışmanın literatürdeki benzer i çalışmalara
kıyasla önemli bir katkısı, referans akım üretimi için gerekli PNS gerilim ve akım
bileşenlerinin önerilen hızlı ve sağlam ikili ortalama filtre tabanlı faz
kilitlemeli döngü (DAPLL) ile ayrılmasıdır. Önerilen PCI tabanlı akım kontrol
stratejisinin performansı çeşitli durum çalışmaları kullanılarak PI tabanlı
ikili akım kontrolcü ile karşılaştırılıp test edilmiştir. 

Anahtar Kelimeler

Yenilenebilir enerji kaynaklı evirici, oransal kompleks integratör, pozitif ve negatif sıralı bileşenler, ikili ortalama filtre tabanlı PLL

Kaynakça

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