Indirect dc-link voltage control of two-stage single-phase PV inverter

This paper presents a novel indirect dc-link voltage control scheme for the application of grid-tied two-stage single-phase photovoltaic conversion system. Unlike the traditional control method for grid-tied inverters where the dc-link voltage is always directly sensed to regulate the output current, the proposed scheme eliminates the dc-link voltage sensing unit but does not downgrade the inverter overall performance. The proposed scheme can be easily extended to control the multi-string configuration without any extra control complexity needed. Simulation verifications prove the effectiveness of the proposed control scheme.

[1]  Philip T. Krein,et al.  Cost-Effective Hundred-Year Life for Single-Phase Inverters and Rectifiers in Solar and LED Lighting Applications Based on Minimum Capacitance Requirements and a Ripple Power Port , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

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

[3]  Jorge L. Duarte,et al.  Predictive DC voltage control of single-phase PV inverters with small DC link capacitance , 2003, 2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692).

[4]  Dehong Xu,et al.  A new maximum photovoltaic power tracking control scheme based on power equilibrium at DC link , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

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

[6]  Xinbo Ruan,et al.  Means of Eliminating Electrolytic Capacitor in AC/DC Power Supplies for LED Lightings , 2009, IEEE Transactions on Power Electronics.

[7]  Hanju Cha,et al.  Design and Implementation of Photovoltaic Power Conditioning System Using a Current Based Maximum Power Point Tracking , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[8]  Tsai-Fu Wu,et al.  PV Power Injection and Active Power Filtering With Amplitude-Clamping and Amplitude-Scaling Algorithms , 2007, IEEE Transactions on Industry Applications.

[9]  Dehong Xu,et al.  Power sensor-less MPPT control scheme utilizing power balance at DC link-system design to ensure stability and response , 2001, IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243).

[10]  T. Shimizu,et al.  Flyback-Type Single-Phase Utility Interactive Inverter With Power Pulsation Decoupling on the DC Input for an AC Photovoltaic Module System , 2006, IEEE Transactions on Power Electronics.

[11]  R. Teodorescu,et al.  Optimized Maximum Power Point Tracker for fast changing environmental conditions , 2008, 2008 IEEE International Symposium on Industrial Electronics.

[12]  F. Blaabjerg,et al.  Control of single-stage single-phase PV inverter , 2006, 2005 European Conference on Power Electronics and Applications.

[13]  Jae-Eon Kim,et al.  Design and Implementation of Photovoltaic Power Conditioning System using a Current-based Maximum Power Point Tracking , 2010 .

[14]  Marco Liserre,et al.  Study of the Effects of Inductor Nonlinear Behavior on the Performance of Current Controllers for Single-Phase PV Grid Converters , 2008, IEEE Transactions on Industrial Electronics.

[15]  Frede Blaabjerg,et al.  Proportional-resonant controllers and filters for grid-connected voltage-source converters , 2006 .

[16]  Tsai-Fu Wu,et al.  A single-phase inverter system for PV power injection and active power filtering with nonlinear inductor consideration , 2005 .