LCL filter Design for Grid Connected NPC Type Three-Level Inverter

Öz

This paper describes a LCL filter design method for a grid connected NPC three-level inverter. By analyzing the ripple current according to the switching of NPC three-level inverter, the inverter side inductor is designed without any information about the modulation index. After considering the relation between the inductance ratio of inverter inductor to grid inductor and the filtering effect at the switching frequency, the relation between the inductance ratio and the attenuation of output ripple, and the current ripple of inverter side inductor, the optimized value of LCL filter is designed to meet the design criteria. Finally, the proposed design method is validated through the simulation and experimental results.

Anahtar Kelimeler

• solar energy; PCS (power conditioning system); LCL filter; NPC three-level inverter; grid-connected inverter

Kaynakça

1. T. Ackermann, G. Andersson, and L. Soder, “Electricity Market Regulations and Their Impact on Distributed Generation,” in Conf. Rec. of Electric Utility Deregulation and Restructuring and Power Technologies, pp. 608-613, 2000.
2. M. Lisserre, F. Blaabjerg, and Steffan Hansen, "Design and Control of an LCL Filter Based Three Phase Active Rectifier," IEEE Trans. Ind. Appl., vol. 41, no. 5, pp. 1281- 1291, 2005.
3. Malikarjuna G D, Naik R L, and Suresh H. Jangamshetti, “Performance Analysis of Three Level Inverter for L & LCL Filters Connected to Grid,” Int. Journal of Scientific & Engineering Research, vol. 3, no. 6, pp. 1-7, 2012.
4. Fig. 17. Results of PLL.
5. Fig. 18. Voltage and current waveforms of phase a.
6. Fig. 19. Load voltage waveform under stand-alone mode.
7. Youcef Soufi, Sihem Ghoudelbourk, Tahar Bahi, and Hichem Merabe, “Harmonics Minimization of Multilevel Inverter Connecting Source Renewable Energy,” International Journal of Renewable Energy Reserch, vol. 1, no. 4. pp. 265-270, 2011.
8. Frede Blaabjerg and Eftichios Koutroulis, “Methods for the Optimal Design of Grid - Connected PV Inverters,” International Journal of Renewable Energy Reserch, vol. 1, no. 2 pp. 54-64, 2011.

9. Yongqiang Lang, Dianguo Xu, Hadianamrei S.R., and Hongfei Ma, "A Novel Design Method of LCL Type Utility Interface for Three-Phase Voltage Source Rectifier," in Conf. Rec. of IEEE PESC'05, pp. 313-317, 2005.
10. Min-Young Park, Min-Hun Chi, Jong-Hyoung Park, Heung-Geun Kim, Tae-Won Chun, and Eui-Cheol Nho, "LCL-filter Design for Grid-Connected PCS Using Total Harmonic Distortion and Ripple Attenuation Factor," in Conf. Rec. of IPEC’2010, pp. 1688-1694, 2010.
11. Hamid R. Karshenas and Hadi Saghafi, "Basic Criteria in Designing LCL filter for Grid Connected Converters," in Conf. Rec. of IEEE ISIE’2006, vol. 3, pp. 1996-2000, 2006.
12. Sang-Hyuk Jung and Se-Wan Choi, "Optimized LCL filter Design Method of Utility Interactive Inverter," Trans. of KIPE, vol. 18, no. 1, pp. 103-109, 2013.
13. A. Nabae, I. Takahashi, and H. Akagi, "A New Neutral Point Clamped PWM Inverter," IEEE Trans. Ind. Appl., vol. 17, no. 5, pp. 518-523, 1981.
14. S. Vasconcelos Araujo, A. Engler, and F. L. M. Antunes, “LCL Filter Design for Grid-Connected NPC Inverters in Offshore Wind Turbines,” in Conf. Rec. Of ICPE’2007, pp. 1133-1138. 2007.
15. Biying Ren, Xiangdong Sun, Shaoliang An, Xiangui Cao, and Qi Zhang, "Analysis and Design of an LCL Filter for the Three-level Grid connected Inverter," in Conf. Rec. of IPEMC '2012, vol. 3, pp. 2023-2027, 2012.
16. N. Yu, J. Yang, S. Chen, and M. Ye, “Design of LCL- Filter Based Three-Level Active Power Filters,” TELKOMNIKA Indonesian Journal of Electrical Engineering, vol. 12, no. 1, pp. 48-56, 2014.
17. Recommended Practices and Requirement for Harmonic Control in Electrical Power Systems, IEEE Std. 519, 1992.
18. Standard for Interconnecting Distributed Resources With Electric Power System, IEEE Std. 1547.2, 2008.
19. Fang Liu, Xing Zhang, Changzhou Yu, and Zhangping Shao, "LCL Filter Design for Grid connected Three Phase PWM Converter Based on Maximum Current," in Conf. Rec. of IPEMC’2013, pp. 631-635, 2013.