Design of L, LCL and LLCL Type Filter for Single Phase Grid Connected Inverters

Year 2022, Volume: 12 Issue: 1, 448 - 460, 15.06.2022

Akif Karafil

https://doi.org/10.31466/kfbd.1093962

Cited By: 2

Abstract

In this study, L, LCL and LLCL type filters were designed for single phase grid connected inverter and filter types were compared with each other. For the design, filter parameter values were calculated so that the total harmonic distortion (THD) value of the grid current would be below 5%. After the filter parameter values were determined, simulation studies were carried out in the PSIM program. In the study, the codes required for active power control, proportional-resonant (PR) current control and enhanced phase locked loop (PLL) control were written in the C block. The simulation results showed that while the 1 kW power was transferred to the 220 V AC grid, the highest THD value was obtained as 4.92% in the L type filter, while the lowest THD value was as 0.99% in the LLCL filter type. According to the filter design, the filter type with the highest inductance value was found to be the L filter. Although THD values were low in LCL and LLCL filter types, it was seen that it was important to choose appropriate parameter values.

Keywords

Single phase grid connected inverter, Filter design, Enhanced PLL algorithm

Tek Fazlı Şebeke Bağlantılı Eviricilerde L, LCL ve LLCL Tipi Filtre Tasarımı

Abstract

Bu çalışmada, tek fazlı şebeke bağlantılı evirici için L, LCL ve LLCL tipi filtre tasarımları yapılarak filtre tipleri birbirleri ile kıyaslanmıştır. Tasarım için şebeke akımının toplam harmonik bozulma (THD) değeri %5’in altında oluşacak şekilde filtre parametre değerleri hesaplanmıştır. Filtre parametre değerleri belirlendikten sonra PSIM programında simülasyon çalışmaları gerçekleştirilmiştir. Çalışmada aktif güç kontrolü, oransal-rezonans (PR) akım kontrolü ve gelişmiş faz kilitlemeli döngü (PLL) kontrolü için gerekli olan kodlar C bloğu içerisine yazılmıştır. Simülasyon sonuçlarına göre 1 kW güç, 220 V AC şebekeye aktarılırken en yüksek THD değeri %4.92 olarak L tipi filtrede elde edilirken, en düşük THD değeri %0.99 olarak LLCL filtre tipinde oluşmuştur. Yapılan filtre tasarımına göre endüktans değeri en yüksek olan filtre tipi de L filtredir. LCL ve LLCL filtre tiplerinde THD değerleri düşük çıkmasına rağmen uygun parametre değerlerinin seçilmesinin önemli olduğu görülmüştür. 

Keywords

Tek fazlı şebeke bağlantılı evirici, Filtre tasarımı, Gelişmiş PLL algoritması

References

• Akpolat, A. N., Dursun, E., and Siano, P. (2021). Inverter-Based Modeling and Energy Efficiency Analysis of Off-Grid Hybrid Power System in Distributed Generation. Computers & Electrical Engineering, 96, 107476.
• Alemi, P., Bae, C. J., and Lee, D. C. (2016). Resonance Suppression Based on PR Control for Single-Phase Grid-Connected Inverters with LLCL Filters. IEEE Journal of Emerging and Selected Topics in Power Electronics, 4(2), 459-467.
• Fu, X., and Li, S. (2016). A Novel Neural Network Vector Control for Single-Phase Grid-Connected Converters with L, LC and LCL Filters. Energies, 9(5), 328.
• Gökçek, T., ve Ateş, Y., (2019). Dağıtık Güç Üretiminin Şebekeye Entegrasyonu ve Olası Etkilerinin İncelenmesi. Avrupa Bilim ve Teknoloji Dergisi, (15), 216-228.
• Husev, O., Chub, A., Romero-Cadaval, E., Roncero-Clemente, C., and Vinnikov, D. (2015). Voltage Distortion Approach for Output Filter Design for Off-Grid and Grid-Connected PWM Inverters. Journal of Power Electronics, 15(1), 278-287.
• Kantar, E., Usluer, S. N., ve Hava, A. M. (2013, November). Design and performance analysis of a grid connected PWM-VSI system. In 2013 8th International Conference on Electrical and Electronics Engineering (ELECO) (pp. 157-161). Bursa, Turkey.
• Karaca, M., Mamizadeh, A., Genc, N., ve Sular, A. (2019, November). Analysis of Passive Filters for PV Inverters Under Variable Irradiances. In 2019 8th International Conference on Renewable Energy Research and Applications (ICRERA) (pp. 680-685). Brasov, Romania.
• Karafil, A., Özbay, H., ve Öncü, S. (2018, Ekim). Bir Fazlı Şebeke Etkileşimli Evirici Tasarımı için LCL Filtre Analizi. International Conference on Data Science and Applications (ICONDATA) (s.560-574). Yalova.
• Karafil, A. (2020). Effect of Passive Series Damping Resistor on Single Phase Grid Connected Inverter with LCL Filter. Pamukkale University Journal of Engineering Sciences, 26(5), 927-934.
• Karafil, A. (2020). Change Effect of LCL Filter Parameter Values and Series Damping Resistor Value in Single Phase Grid Connected Inverter. EMO Bilimsel Dergi, 10(1), 38-44.
• Karafil, A. (2021, Nisan). Bir Fazlı Şebeke Etkileşimli Eviricilerde Kullanılan PLL Algoritmaları. 5. Uluslararası Mühendislik ve Teknoloji Yönetimi Kongresi (s. 482-490). İstanbul.
• Li, S., Fu, X., Ramezani, M., Sun, Y., and Won, H. (2015). A Novel Direct-Current Vector Control Technique for Single-Phase Inverter with L, LC and LCL Filters. Electric Power Systems Research, 125, 235-244.
• Liu, Y., Jin, D., Jiang, S., Liang, W., Peng, J., and Lai, C. M. (2019). An Active Damping Control Method for the LLCL Filter-Based SiC MOSFET Grid-Connected Inverter in Vehicle-to-Grid Application. IEEE Transactions on Vehicular Technology, 68(4), 3411-3423.
• Nicastri, A., and Nagliero, A. (2010, July). Comparison and Evaluation of the PLL Techniques for the Design of the Grid-Connected Inverter Systems. In 2010 IEEE International Symposium on Industrial Electronics (pp. 3865-3870). Bari, Italy.
• Radwan, E., Nour, M., Baniyounes, A., and Al-Olimat, K. S. (2021). Design of Type-1 Servo Controller for Grid Voltage Modulated Direct-Power Control of Single-Phase Grid-Connected PV Inverter. International Journal of Electrical & Computer Engineering, 11(3), 1912-1923.
• Saleem, M., Ahmed Khan Khushik, M. H., Tahir, H., and Kim, R. Y. (2021). Robust L Approximation of an LCL Filter Type Grid-Connected Inverter Using Active Disturbance Rejection Control under Grid Impedance Uncertainty. Energies, 14(17), 5276.
• Sanatkar-Chayjani, M., and Monfared, M. (2016). Design of LCL and LLCL Filters for Single-Phase Grid Connected Converters. IET Power Electronics, 9(9), 1971-1978.
• Santos Filho, R. M., Seixas, P. F., Cortizo, P. C., Torres, L. A., and Souza, A. F. (2008). Comparison of Three Single-Phase PLL Algorithms for UPS Applications. IEEE Transactions on Industrial Electronics, 55(8), 2923-2932.
• Sosa, J. M., Escobar, G., Martinez-Rodriguez, P. R., Vazquez, G., Juarez, M. A., and Diosdado, M. (2014, November). Comparative Evaluation of L and LCL Filters in Transformerless Grid Tied Converters for Active Power Injection. In 2014 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC) (pp. 1-6). Ixtapa, Mexico.
• Wu, W., He, Y., and Blaabjerg, F. (2012). An LLCL Power Filter for Single-Phase Grid-Tied Inverter. IEEE Transactions on Power Electronics, 27(2), 782-789.
• Wu, W., He, Y., Tang, T., and Blaabjerg, F. (2013). A New Design Method for the Passive Damped LCL and LLCL Filter-Based Single-Phase Grid-Tied Inverter. IEEE Transactions on Industrial Electronics, 60(10), 4339-4350.