Modelling and Simulation of 3-phase Transformerless Split Inductor Multilevel Inverter for Grid Connected Photovoltaic System

A Split inductor is used with Exiting Inverter to interconnect inverter with grid connected system which avoids the usage of transformer. While using split inductor NPC-MLI shoot-through problems are producing in the bridge legs of an NPCTLI, its operation stability is ruined. Hysteresis Current Control (HCC) offers an excellent current control performance to NPCTLI. It acts based on the error current value i) and hysteresis band value (h). The proposed topology guarantees for no common-mode voltage, shoot-through possibility and capacitor balancing problem. Finally, the simulation results of a proposed SI-NPCTLI system verified using MATLAB SIMULINK.

[1]  U. Borup,et al.  Transformerless Photovoltaic Inverters Connected to the Grid , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[2]  J. Doval-Gandoy,et al.  Eliminating Ground Current in a Transformerless Photovoltaic Application , 2010, IEEE Transactions on Energy Conversion.

[3]  Vassilios G. Agelidis,et al.  Multilevel converters for single-phase grid connected photovoltaic systems-an overview , 1998, IEEE International Symposium on Industrial Electronics. Proceedings. ISIE'98 (Cat. No.98TH8357).

[4]  E. Gubia,et al.  Cascaded H-bridge multilevel converter for grid connected photovoltaic generators with independent maximum power point tracking of each solar array , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[5]  Hirofumi Shinohara,et al.  Development of a residential use, utility interactive PV inverter with isolation transformer-less circuit-development aspects , 1994, Proceedings of 1994 IEEE 1st World Conference on Photovoltaic Energy Conversion - WCPEC (A Joint Conference of PVSC, PVSEC and PSEC).

[6]  M. Sumner,et al.  Evaluation of Three-Phase Transformerless Photovoltaic Inverter Topologies , 2007, IEEE Transactions on Power Electronics.

[7]  Shaojun Xie,et al.  Leakage Current Analytical Model and Application in Single-Phase Transformerless Photovoltaic Grid-Connected Inverter , 2010, IEEE Transactions on Electromagnetic Compatibility.

[8]  F. Antunes,et al.  A DC/AC converter for single-phase grid-connected photovoltaic systems , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[9]  Pablo Sanchis,et al.  Ground currents in single-phase transformerless photovoltaic systems , 2007 .

[10]  H. H. Zeineldin,et al.  A Simple Approach to Modeling and Simulation of Photovoltaic Modules , 2012, IEEE Transactions on Sustainable Energy.