PIC denetimli reaktif güç rölesi tasarımı

Bu çalışmada birden çok alıcının bulunduğu bir sistemin reaktif güç ihtiyacını sürekli olarak kontrol eden bir reaktif güç rölesi tasarlanarak uygulaması gerçekleştirilmiştir. Sisteme ait akım ve gerilim bilgileri sürekli olarak ölçülüp PIC’e aktarılmıştır. Bu bilgiler kullanılarak, yükün ihtiyaç duyduğu reaktif güç yazılım ile hesap edilmiş ve uygun kondansatör grupları tek adımda devreye alınarak minimum anahtarlama yapılmıştır. Tasarlanan röle üç fazdan örnekleme aldığı için dengesiz yüklü sistemlerin reaktif güç kompanzasyonuna, her fazın akım, gerilim, güç katsayısı, aktif ve reaktif güçlerin izlenmesine imkan sağlamaktadır. Uygulama neticeleri tasarlanan rölenin basit yapılı ve küçük boyutlu olduğunu, sistemin güç katsayısını 0.95 ile 1.00 arasında tuttuğunu, bütün bu özellikleri nedeniyle piyasadaki rölelerden daha kullanışlı ve ekonomik olduğunu göstermiştir.

Designing of a reaktive power relay based on a PIC

In this study, a reactive power compensation relay continuously controlling the reactive power of the system with more than one load has been designed and implemented. The current and the voltage data are loaded into a PIC. Using the measured data, the reactive power required for compensation was calculated via the software and the capacitor groups were taken in service at a single step to achieve minimum number of switching. The relay de- veloped takes simples from each phase, and therefore it is capable of compensation of unbalanced systems, and observing the current, the voltage, the power factor, the active power and the reactive power in each phase of un- balanced systems. Experimental results show that the developed relay is user friendly and has small dimensions.Moreover, the power factor of the system was kept between 0.95 and 1.0. Due to these features, the designed relay is more useful and economic than other relays used in market.

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