Commenced in January 2007
Paper Count: 30840
Bipolar PWM and LCL Filter Configuration to Reduce Leakage Currents in Transformerless PV System Connected to Utility Grid
Authors: Shanmuka Naga Raju
Abstract:This paper presents PV system without considering transformer connected to electric grid. This is considered more economic compared to present PV system. The problem that occurs when transformer is not considered appears with a leakage current near capacitor connected to ground. Bipolar Pulse Width Modulation (BPWM) technique along with filter L-C-L configuration in the circuit is modeled to shrink the leakage current in the circuit. The DC/AC inverter is modeled using H-bridge Insulated Gate Bipolar Transistor (IGBT) module which is controlled using proposed Bipolar PWM control technique. To extract maximum power, Maximum Power Point Technique (MPPT) controller is used in this model. Voltage and current regulators are used to determine the reference voltage for the inverter from active and reactive current where reactive current is set to zero. The PLL is modeled to synchronize the measurements. The model is designed with MATLAB Simulation blocks and compared with the methods available in literature survey to show its effectiveness.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1317344Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 523
 Kamalasadan, Sukumar, and Khalid S. Al-Olimat, “Modeling and control of a micro-grid set up using photovoltaic arrays,” System Theory (SSST), 2013 45th Southeastern Symposium on. IEEE, 2013.J.
 Sørensen, Bent, and Greg Watt, “Trends in Photovoltaic Applications, Survey report of selected IEA countries between 1992 and 2005: Report IEA-PVPS T1-15: 2006,” (2006).
 Ahmad, G. E., H. M. S. Hussein, and H. H. El-Ghetany, “Theoretical analysis and experimental verification of PV modules,” Renewable Energy 28.8 (2003): 1159-1168.
 Shayestegan, Mohsen, et al., “An overview on prospects of new generation single-phase transformerless inverters for grid-connected photovoltaic (PV) systems,” Renewable and Sustainable Energy Reviews 82 (2018): 515-530.
 Zhou, Liwei, Feng Gao, and Tao Xu, “Implementation of Active NPC Circuits in Transformer-Less Single-Phase Inverter With Low Leakage Current,” IEEE Transactions on Industry Applications 53.6 (2017): 5658-5667.
 Surendran, Sruthi, S. Ajayan, and S. Sruthi, “Advanced topology to minimize leakage current grid-tied PV systems,” Circuit, Power and Computing Technologies (ICCPCT), 2017 International Conference on. IEEE, 2017.
 Chakraborty, Sajib, Mohammed Mahedi Hasan, and M. Abdur Razzak, “Transformer-less single-phase grid-tie photovoltaic inverter topologies for residential application with various filter circuits,” Renewable and Sustainable Energy Reviews 72 (2017): 1152-1166.
 Chamarthi, Phani Kumar, Mini Rajeev, and Vivek Agarwal, “A novel single stage zero leakage current transformer-less inverter for grid connected PV systems,” Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd. IEEE, 2015.
 Ranganayaki, V., et al, “High efficient transformer less MOSFET single phase inverter for PV systems,” Innovations in Green Energy and Healthcare Technologies (IGEHT), 2017 International Conference on. IEEE, 2017.
 Mostaan, Ali, et al, A Transformer-less Single Phase Inverter For photovoltaic Systems."
 Alajmi, Bader N., et al, “Single-phase single-stage transformer less grid-connected PV system” IEEE Transactions on Power Electronics 28.6 (2013): 2664-2676.
 Mostaan, Ali, et al., “Single Phase Transformer-less Buck-Boost Inverter with Zero Leakage Current for PV Systems,”43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017. IEEE Press, 2017.