HABERLEŞME İÇERMEYEN MİKRO ŞEBEKELER İÇİN DÜŞÜM KONTROL TABANLI ORANTISAL GÜÇ PAYLAŞIM YÖNTEMİ

Yıl 2020, Cilt: 9 Sayı: 1, 137 - 145, 30.01.2020

Ali Rıfat Boynueğri

https://doi.org/10.28948/ngumuh.542985

Öz

DC mikro
şebekelerinin popülerliği oldukça artsa da yük paylaşımı mikro şebekelerde
yaygın kullanımın önüne geçen çözümlenmemiş bir engel teşkil etmektedir. En çok
tercih edilen yük paylaşım yöntemlerinden biri olan geleneksel düşüm yöntemi
kısmen yük paylaşımını sağlasa da bu hatların eşit direnç değerlerine sahip
olmasına bağlıdır. Ayrıca bu sistemin bir diğer dezavantajı ise baralarda
oluşan düşüm tabanlı kontrolden kaynaklanan fazladan gerilim düşümüdür. Bu
çalışma da DC mikro şebekeleri için orantısal yük paylaşımını haberleşme
içermeyen bir şekilde başarı ile sağlayan yeni bir yaklaşım önerilmiştir. Bu
yöntem sabit bir gerilim yerine doğrultulmuş sinüzoidal dalga şekline sahip DC
gerilimi önermektedir. Bu sayede periyodik bir sinyal üretilerek AC düşüm tabanlı
kontrolde olduğu gibi yüklenmeye bağlı olarak sinyalin frekansı düşürülmüştür. Önerilen
yöntemi doğrulamak amacı ile geleneksek düşüm yöntemi ile karşılaştırıcı bir
benzetim çalışması gerçekleştirilmiştir. Önerilen yöntem sistemin gerilim
performansını yaklaşık olarak %5 ve yük paylaşım performansını da %17.10
oranında arttırdığı görülmüştür.

Anahtar Kelimeler

DC mikro şebeke, düşüm kontrolü, güç yönetimi, yük paylaşımı

A DROOP CONTROL BASED PROPOTIONAL POWER SHARING METHOD FOR DC MICROGRIDS WITHOUT COMMUNICATION

Öz

Although DC
microgrids are getting popular, load sharing is still an unsolved obstacle for
widespread operation. Conventional droop method which is one of the most
preferred load sharing method partially manages load sharing however this is
related to equal line resistance. Also extra voltage drop arise out of the
droop method is another disadvantage of the system. In this study a new
approach which achieves proportional load sharing without communication is
proposed for DC Microgrids. This method presents a variable DC voltage level
like rectified sinusoidal voltage instead of a constant DC Voltage. By this way
a periodical signal is generated and frequency of this signal is controlled
according to loading level like the AC droop control. A comparative simulation
study with conventional droop control is done to verify the proposed method.
Results show that proposed method increased the voltage performance of the
system nearly %5, load sharing performance %17.10.

Anahtar Kelimeler

DC microgrid, droop control, power management, load sharing

Kaynakça

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