Improved Transformerless Inverter for PV Grid Connected Power System by using ISPWM Technique
 |
International Journal of Engineering Trends and Technology (IJETT) | 
|
| © 2013 by IJETT Journal | ||
| Volume-4 Issue-5 |
||
| Year of Publication : 2013 | ||
| Authors : R.Antony Raja Sekar , D.Arun Prasad |
Citation
R.Antony Raja Sekar , D.Arun Prasad. "Improved Transformer less Inverter for PV Grid Connected Power System by using ISPWM Technique". International Journal of Engineering Trends and Technology (IJETT). V4(5):1512-1517 May 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.
Abstract
This paper presents an improved transformerless inverter with common mode leakage current elimination for a photovoltaic grid connected power system by using inverse sine carrier pulse width modulation (ISPWM). To eliminate the common - mode leakage current in the transformerless photovoltaic grid - connected system, an improved single - phase inverter topology is presented. The improved transformerless inverter can sustain the same low input voltage as the full - bridge inverter and guarantee to eliminating common - mode leakage current. The inverse sine carrier pulse width modulation (ISPWM) control strategy can be applied to implement the presented inverter. The lower total harmonic distorsion and higher fundamental output voltage are obtained by using the inverse sine carrier pulse width modulation (ISPWM). The maximum power point tracking (MPPT) is used to extract the maximum power form PV panel. The high e fficiency and convenient thermal design are achieved thanks to the decoupling of two additional switches connected to the dc side of the inverter .
References
[1] S.B. Kjaer, J.K. Pedersen, and F. Blaabjerg, “ A review of single phase grid – connected inverters for photovoltaic modules ,” IEEE Trans. Ind., vol. 41, no. 5, pp. 1292 – 1306, Sep./Oct. 2005.
[2] Q. Li and P. Wolfs , “ A rev iew of the single phase photovoltaic Module Integrated converter topologies with three different DC link configurations ,” IEEE Trans. Power Electron., vol. 23, no. 3, pp. 1320 – 1333, May 2008.
[3] T. Kerekes, R. Teodorescu, and U. Borup, “ Transfo rmerless photovoltaic inverters connected to the grid ,” in Proc. IEEE 22 nd Annu. Appl. Power Electron. Conf., 2007, pp. 1733 – 1737.
[4] O. Lopez, R. Teodorescu, and J. Doval - Gandoy, “ Multilevel Transformerless topologies for single - phase grid - connected converters ,” in Proc. 32 nd Annu. Conf. IEEE Ind. Electron. Soc., Nov. 2006, pp. 5191 – 5196.
[5] R. Gonzalez, E. Gubia, J. Lopez, and L. Marroyo, “ Transformerless single phase multilevel - based photo voltaic inverter ,” IEEE Trans. Ind Electron., vol. 55, no. 7, pp. 2694 – 2702, Jul. 2008.
[6] T. Kerekes, M. Liserre, R. Teodorescu, C. Klumpner, and M. Sumner ,“ Evaluation of three - phase transformerless photovoltaic inverter topologies ,” IEEE Trans. Power Electron., v ol. 24, no. 9, pp. 2202 – 2211, Sep.2009.
[7] Vafaoui., B. Wu and R. Cheung , “ Implementation of maximum power point tracking algorithm for residential photovoltaic systems ,” 2 nd Canadian Solar Building s Conference Calgary, June 10 – 14, 2 007.
[8] Joe - Air Jiang, Tsong - Liang Huang, Ying - Tung Hsiao, Chia - Hong Chen, “ Maximum Power Tracking for Photovoltaic Power Systems , ” Tamkang Journal of Science and Engineering, 2005, Vol. 8, No. 2, pp. 147 - 153.
[9] S. Jeevananthan, R. Nandhakumar, P. Da nanjayan, “ Inverted Sine carrier for Fundamental Fortification in PWM Inverters and FPGA Based Implementations ,” Vol.4, No.2, November 2007, 171 - 187.
[10] R. Seyezhai, Dr.B.L. Mathur, “ Performance Evaluation Of Inverted Sine PWM Technique For An Asymmetric Cascaded Multilevel Inverter ,” Journal of Theoretical and Applied Information Technology 2009.
Keywords
Photovoltaic (PV) system , Inverse sine carrier pulse width modulation (ISPWM), Improved transformerless inverter, Maximum power point tracking (MPPT).