Reliability Analysis and Cost Optimization of Parallel-Inverter System

As the penetration of renewable energy resources proliferate, inverters have been employed as interface in distributed power systems. To achieve expanded power level and system redundancy, parallel connection of inverters has been widely used. This paper derives mathematical models to quantitatively evaluate the reliability of parallel inverters under different topologies and control strategies. A framework to determine the number of inverters in parallel in terms of reliability and cost optimization is proposed. Sensitivity analysis is carried out to identify the impact of parameter variation on system reliability and total cost. At last, power densities of different structures are analyzed for a fair comparison.

[1]  R. W. De Doncker,et al.  Reliability Prediction for Inverters in Hybrid Electrical Vehicles , 2007 .

[2]  Ajeet Rohatgi,et al.  Development of a Methodology for Improving Photovoltaic Inverter Reliability , 2008, IEEE Transactions on Industrial Electronics.

[3]  Gehan A. J. Amaratunga,et al.  Long-Lifetime Power Inverter for Photovoltaic AC Modules , 2008, IEEE Transactions on Industrial Electronics.

[4]  Michel Mermet-Guyennet,et al.  Long-Term Reliability of Railway Power Inverters Cooled by Heat-Pipe-Based Systems , 2011, IEEE Transactions on Industrial Electronics.

[5]  F. Blaabjerg,et al.  Power electronics as efficient interface in dispersed power generation systems , 2004, IEEE Transactions on Power Electronics.

[6]  Xiaoxiao Yu,et al.  Control of Parallel-Connected Power Converters for Low-Voltage Microgrid—Part I: A Hybrid Control Architecture , 2010, IEEE Transactions on Power Electronics.

[7]  Y. Ito,et al.  Parallel redundant operation of UPS with robust current minor loop , 1997, Proceedings of Power Conversion Conference - PCC '97.

[8]  J.M. Guerrero,et al.  Hierarchical control of droop-controlled DC and AC microgrids — a general approach towards standardization , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[9]  D. Collier,et al.  Photovoltaic system reliability , 1997, Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997.

[10]  Alexander B. Maish,et al.  Defining requirements for improved photovoltaic system Reliability , 1999 .

[11]  Stefano Tarantola,et al.  Sensitivity Analysis in Practice: A Guide to Assessing Scientific Models , 2004 .

[12]  Jan T. Bialasiewicz,et al.  Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey , 2006, IEEE Transactions on Industrial Electronics.

[13]  T. Kawabata,et al.  Parallel Operation of Voltage Source Inverters , 1986, 1986 Annual Meeting Industry Applications Society.

[14]  J. H. Naylor,et al.  System Reliability Modelling and Evaluation , 1977 .

[15]  M. Zuo,et al.  Optimal Reliability Modeling: Principles and Applications , 2002 .

[16]  M. Veerachary,et al.  Reliability Issues in Photovoltaic Power Processing Systems , 2008, IEEE Transactions on Industrial Electronics.

[17]  Miroslav Begovic,et al.  Four-year performance assessment of the 342 kW PV system at Georgia Tech , 2000, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036).

[18]  Ashwin M. Khambadkone,et al.  Control of paralleled PEBBs to facilitate the efficient operation of microgrid , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[19]  G. Oriti,et al.  A Comparison of Redundant Inverter Topologies to Improve Voltage Source Inverter Reliability , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[20]  Freddy Chan,et al.  Reliability Estimation of Three Single-Phase Topologies in Grid-Connected PV Systems , 2011, IEEE Transactions on Industrial Electronics.

[21]  Dehong Xu,et al.  Modeling, analysis, and implementation of parallel multi-inverter systems with instantaneous average-current-sharing scheme , 2003 .

[22]  U. Drofenik,et al.  PWM Converter Power Density Barriers , 2007, 2007 Power Conversion Conference - Nagoya.