Voltage-Source Control of PV Inverter in a CERTS Microgrid

Microgrids are highly compatible with photovoltaic (PV) sources because of their ability to internally aggregate and balance multiple renewable sources. Traditional grid-connected PV inverter control configurations are basically current sourced and cannot easily control ac voltage or frequency. The PV inverter using the Consortium for Electric Reliability Technology Solutions (CERTS) concepts can control ac voltage and frequency but have a major problem with load transients. During a load transient, the PV microsource becomes overloaded with the possibility of collapsing the dc bus voltage resulting in an ac voltage drop. This paper presents a PV inverter control strategy which enables PV to behave as a voltage source and is capable of maintaining dc bus voltage stability during load transient. With this PV inverter control configuration, it is shown that the PV microsource can operate as a voltage source in the CERTS microgrid.

[1]  Bo Zhao,et al.  Integrated Microgrid Laboratory System , 2013, IEEE Transactions on Power Systems.

[2]  M. Liserre,et al.  A new control structure for grid-connected LCL PV inverters with zero steady-state error and selective harmonic compensation , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[3]  R H Lasseter,et al.  CERTS Microgrid Laboratory Test Bed , 2011, IEEE Transactions on Power Delivery.

[4]  Emilio Figueres,et al.  Reconfigurable Control Scheme for a PV Microinverter Working in Both Grid-Connected and Island Modes , 2013, IEEE Transactions on Industrial Electronics.

[5]  P. Kundur,et al.  Power system stability and control , 1994 .

[6]  Bill Rose,et al.  Microgrids , 2018, Smart Grids.

[7]  M. M. A. Salama,et al.  Seamless Formation and Robust Control of Distributed Generation Microgrids via Direct Voltage Control and Optimized Dynamic Power Sharing , 2012, IEEE Transactions on Power Electronics.

[8]  Yung-Ruei Chang,et al.  Preliminary implementation of microgrid with photovoltaic and microturbine for stand alone operation , 2012, 2012 IEEE Industry Applications Society Annual Meeting.

[9]  Syed Islam,et al.  A battery management system for stand alone photovoltaic energy systems , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[10]  G. Venkataramanan,et al.  Small Signal Dynamics of Inverter Interfaced Distributed Generation in a Chain-Microgrid , 2007, 2007 IEEE Power Engineering Society General Meeting.

[11]  T. M. Jahns,et al.  Comparison of PV inverter controller configurations for CERTS microgrid applications , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[12]  Robert Lasseter,et al.  Smart Distribution: Coupled Microgrids , 2011, Proceedings of the IEEE.

[13]  T.C. Green,et al.  Modeling, Analysis and Testing of Autonomous Operation of an Inverter-Based Microgrid , 2007, IEEE Transactions on Power Electronics.

[14]  D. T. Rizy,et al.  Real and reactive power control of a three-phase single-stage PV system and PV voltage stability , 2012, 2012 IEEE Power and Energy Society General Meeting.

[15]  Roger Gules,et al.  A Maximum Power Point Tracking System With Parallel Connection for PV Stand-Alone Applications , 2008, IEEE Transactions on Industrial Electronics.

[16]  Jeyraj Selvaraj,et al.  Multilevel Inverter For Grid-Connected PV System Employing Digital PI Controller , 2009, IEEE Transactions on Industrial Electronics.

[17]  Giri Venkataramanan,et al.  Small Signal Stability Of A Microgrid With Parallel Connected Distributed Generation , 2010, Intell. Autom. Soft Comput..

[18]  H. Nikkhajoei,et al.  Distributed Generation Interface to the CERTS Microgrid , 2009, IEEE Transactions on Power Delivery.

[19]  Zhao Zhengming,et al.  A Single-Stage Three-Phase Grid-Connected Photovoltaic System With Modified MPPT Method and Reactive Power Compensation , 2007, IEEE Transactions on Energy Conversion.

[20]  R. H. Lasseter,et al.  Impact of active resistance on dynamic power responses in a CERTS microgrid , 2012, 2012 IEEE Power and Energy Conference at Illinois.

[21]  Bo Zhao,et al.  Integrated microgrid laboratory system , 2013, 2013 IEEE Power & Energy Society General Meeting.