Design and Analysis of Transformerless Grid-Tie Buck-Boost Photovoltaic Inverter with Immittance Conversion Topology

This article introduces the design and analysis of a single-phase single-stage transformer-less grid-tie buck-boost photovoltaic inverter topology for domestic purposes. Functionally, this new inverter can adjust to a wide range of photovoltaic dc variations, higher or lower dc voltages compared to utility line voltage, and in the meantime track the maximum amount of solar energy all in one single power stage. For switching of inverter power circuit, a combination of sinusoidal pulse width modulation (SPWM) and square wave signal under grid synchronization condition are used. Moreover, to control SPWM duty cycle and to regulate the inverter’s instantaneous ac output voltage, a closed-loop SPWM control technique is used to stabilize the output as fast as possible. Besides, we also employed immittance conversion circuit topology in the inverter output terminal instead of conventional LC filter. The design and analysis of working principles of the inverter control circuit and grid synchronization methods are described in details. This paper mainly focuses on the analysis of working principles, computer simulation of the operation and design consideration of the inverter for grid-connected applications. The effectiveness of the proposed system is clarified through the following mathematical modeling and simulations.

[1]  M. A. Razzak,et al.  A Combined π- and T-type immittance converter for constant current applications , 2013, 2013 International Conference on Informatics, Electronics and Vision (ICIEV).

[2]  J. Nagarjuna Reddy,et al.  Transformer less Inverter for Single-Phase Photovoltaic Systems , 2012 .

[3]  Liuchen Chang,et al.  Closed-loop SPWM control for grid-connected buck-boost inverters , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[4]  Ahmed Abdalrahman,et al.  Simulation and Implementation of Grid-connected Inverters , 2012 .

[5]  M. Abdur Razzak,et al.  Single phase grid-connected photovoltaic inverter for residential application with maximum power point tracking , 2013, 2013 International Conference on Informatics, Electronics and Vision (ICIEV).

[6]  Hisaichi Irie,et al.  Utility Interactive Inverter Using Immittance Converter , 2000 .

[7]  Sajib Chakraborty,et al.  Design of a Transformer-less Grid-Tie Inverter Using Dual-Stage Buck and Boost Converters , 2014 .

[8]  Sajib Chakraborty,et al.  Design of a single stage grid-connected buck-boost photovoltaic inverter for residential application , 2014, 2014 POWER AND ENERGY SYSTEMS: TOWARDS SUSTAINABLE ENERGY.

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

[10]  Syafrudin Masri,et al.  Single phase grid tie inverter for photovoltaic application , 2010, 2010 IEEE Conference on Sustainable Utilization and Development in Engineering and Technology.

[11]  J. Doval-Gandoy,et al.  Grid-synchronization methods for power converters , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[12]  M. Liserre,et al.  Design and control of an LCL-filter based three-phase active rectifier , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[13]  Takahiko Iida,et al.  A TRANSFORMER-LESS SINGLE PHASE INVERTER USING A BUCK-BOOST TYPE CHOPPER CIRCUIT FOR PHOTOVOLTAIC POWER SYSTEM , 1998 .

[14]  P. G. Barbosa,et al.  Boost current multilevel inverter and its application on single-phase grid-connected photovoltaic systems , 2006, IEEE Transactions on Power Electronics.

[15]  Roberto González,et al.  Transformerless Single-Phase Multilevel-Based Photovoltaic Inverter , 2008, IEEE Transactions on Industrial Electronics.

[16]  V. Agarwal,et al.  A Single-Stage Grid Connected Inverter Topology for Solar PV Systems With Maximum Power Point Tracking , 2007, IEEE Transactions on Power Electronics.

[17]  Hossin Hosseinian,et al.  Power Electronics , 2020, 2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES).

[18]  F. Blaabjerg,et al.  A review of single-phase grid-connected inverters for photovoltaic modules , 2005, IEEE Transactions on Industry Applications.

[19]  Shahriar A. Chowdhury,et al.  A theoretical analysis of optimizing solar irradiance: Bangladesh perspective , 2009, 2009 1st International Conference on the Developements in Renewable Energy Technology (ICDRET).

[20]  S. Premrudeepreechacharn,et al.  Determining MPPT and anti-islanding techniques in a grid-tie PV inverter , 2012, 2012 IEEE 15th International Conference on Harmonics and Quality of Power.

[21]  P. Sanchis,et al.  Transformerless Inverter for Single-Phase Photovoltaic Systems , 2007, IEEE Transactions on Power Electronics.