Accurate power loss model of a boost cell in a multiphase converter for phase management

This paper proposes a behavioral model of power losses for multiphase converter that will be used to optimize the efficiency of the converter by dynamically modifying the number of working phases. The aim of this work is to develop a simple (in terms of simulation resources) and but accurate (in terms of energy conversion) model of one cell of the multiphase converter that can be used to deduce the model of the whole converter, depending on the number of active phases. This model could also be used for long-time range simulations of photovoltaic systems. To build the model, a large number of tests has been performed on a multiphase converter at different values of the input voltage, the duty-cycle of the switch drive signals and the output currents. Experimental power losses of the boost cells have been compared with a model proposed in the literature. As the accuracy of this model was not satisfactory, we proposed to fit experimental data with feed-forward artificial neural networks.

[1]  Corinne Alonso,et al.  Behavioral modeling of power losses in FSBB converters , 2013 .

[2]  Fred C. Lee,et al.  A classification and evaluation of paralleling methods for power supply modules , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[3]  H. Haeberlin,et al.  Evolution of Inverters for Grid connected PV-Systems from 1989 to 2000 , 2001 .

[4]  Ji-Yoon Yoo,et al.  A Novel Topology for Photovoltaic DC/DC Full-Bridge Converter With Flat Efficiency Under Wide PV Module Voltage and Load Range , 2008, IEEE Transactions on Industrial Electronics.

[5]  Hirofumi Matsuo,et al.  Control method for autonomous changing the number of DC-DC converters to improve efficiency , 2009, INTELEC 2009 - 31st International Telecommunications Energy Conference.

[6]  B. Estibals,et al.  Automatic data acquisition system for testing photovoltaic conversion chains performances in real conditions , 2010 .

[7]  Y. Lembeye,et al.  Optimization and Design of a Cascaded DC/DC Converter Devoted to Grid-Connected Photovoltaic Systems , 2012, IEEE Transactions on Power Electronics.

[8]  Xuefang Lin-Shi,et al.  Application of averaged models to real-time monitoring of power converters , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[9]  Ken-ichi Funahashi,et al.  On the approximate realization of continuous mappings by neural networks , 1989, Neural Networks.

[10]  B. Estibals,et al.  Control laws to improve efficiency and average life time of an adaptive multi-phases Control laws to improve efficiency and average life time of an adaptive multi-phases , 2011 .

[11]  M Halton,et al.  Efficiency-Based Current Distribution Scheme for Scalable Digital Power Converters , 2011, IEEE Transactions on Power Electronics.

[12]  Walter A. Kosters,et al.  Two neural network methods for multidimensional scaling , 1997, ESANN.

[13]  A. Davoudi,et al.  A Unified Approach to Reliability Assessment of Multiphase DC–DC Converters in Photovoltaic Energy Conversion Systems , 2012, IEEE Transactions on Power Electronics.

[14]  Johann W. Kolar,et al.  Accurate Power Loss Model Derivation of a High-Current Dual Active Bridge Converter for an Automotive Application , 2010, IEEE Transactions on Industrial Electronics.

[15]  Bruno Estibals,et al.  An adaptive control developed for Multi-Phase Converters based on look-up tables and applied to photovoltaic conversion systems , 2012, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society.

[16]  Alberto Reatti Steady-state analysis including parasitic components and switching losses of buck and boost DC-DC PWM converters under any operating condition , 1994 .

[17]  Subhashish Bhattacharya,et al.  Optimal phase changing frequency determination for multiphase voltage regulator modules , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[18]  Luis Martinez-Salamero,et al.  Interleaved converters operation based on CMC , 1999 .