Bir Fazlı Şebeke Etkileşimli Eviricide LCL Filtre Parametre Değerlerinin veSeri Sönümleme Direnç Değerinin Değişim Etkisi

Bu çalışmada bir fazlı şebeke etkileşimli eviricinin LCL filtre parametreleri hesap edilmiştir. Hesap edilen LCL filtre parametrelerinin ve seri sönümleme direncinin %50 artması ve azalması durumunda şebeke akımının toplam harmonik bozulma (THD) ve kayıp güç değerlerinin değişimi analiz edilerek en uygun değerler belirlenmiştir. Analiz çalışmaları PSIM benzetim programı kullanılarak gerçekleştirilmiştir. Çalışma 1 kW gücünde olup akım kontrolünde oransal rezonans (PR) kontrol, PLL algoritmasında ise T/4 gecikmeli PLL yapısı kullanılmıştır. Analiz sonuçlarına göre bobin değerlerinin arttırılması akımın THD değerini ve kayıp güçmiktarını düşürdüğü belirlenmiştir. Sönümleme direnç değerinin düşürülmesi de yine THD ve kayıp güç değerlerini düşürmektedir. LCL filtre tasarımında bobin değerlerinin arttırılması, seri sönümleme direnç değerinin ise düşürülmesinin uygun olacağı görülmüştür. Anahtar kelimeler: LCL filtre, bir fazlı şebeke etkileşimli evirici, PR akım kontrolü.

Change Effect of LCL Filter Parameter Values and Series Damping Resistor Value in Single Phase Grid Connected Inverter

In this study, LCL filter parameters of a single phase gridconnected inverter were calculated. The change of totalharmonic distortion (THD) of the grid current and power lossvalues when the calculated LCL filter parameters and seriesdamping resistor were increased and decreased by 50% wasanalyzed and the most appropriate values were determined.Analysis studies were carried out using the PSIM simulationprogram. The study had a power of 1 kW and proportionalresonant (PR) control was used in current control and T/4delay PLL structure was used in PLL algorithm. According tothe results of the analysis, it was determined that increasingthe inductor values decreased the THD value of the currentand the amount of power loss. In addition, decreasing thedamping resistor value also decreased THD and power lossvalues. In LCL filter design, it was seen that it would beappropriate to increase the inductor values and to decreasethe series damping resistor value. Keywords: LCL filter, single phase grid connected inverter,PR current control

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