Harmonic and Unbalance Compensation Based on Direct Power Control for Electric Railway Systems

This paper presents a general filtering and unbalance compensation scheme for electric traction systems using a direct power control-based algorithm. For a balanced three-phase three-wire system, the proposed method is able to control the power flow exchange between the grid and the load so that the instantaneous complex power is maintained constant. As a consequence, any nonlinear unbalanced load is seen by the three-phase supply as a balanced linear load. The proposed filter is evaluated on power substations with open delta (V-V) and Scott transformer feeders, and for two-level and dual-converter in the power stage. The scheme has been simulated and experimentally validated. The results from experimental and simulation tests show the controller advantages and the applicability of the proposed method in railway systems.

[1]  G.W. Chang,et al.  Modeling characteristics of harmonic currents generated by high-speed railway traction drive converters , 2004, IEEE Transactions on Power Delivery.

[2]  T. Paga,et al.  Power System Analysis Using Space Vector Transformation , 2002, IEEE Power Engineering Review.

[3]  R. E. Morrison.  Power quality issues on AC traction systems , 2000, Ninth International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.00EX441).

[4]  Y. Mochinaga,et al.  Static negative-phase-sequence current compensator for railway power supply system , 1995 .

[5]  Shi-Lin Chen,et al.  Specification of minimum short circuit capacity for three-phase unbalance evaluation of high-speed railway power system , 1995, Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95.

[6]  Peter Wolfs,et al.  Novel topology for correction of unbalanced load in single phase electric traction systems , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[7]  Fei Wang,et al.  Pliant Active and Reactive Power Control for Grid-Interactive Converters Under Unbalanced Voltage Dips , 2011, IEEE Transactions on Power Electronics.

[8]  Fang Zhuo,et al.  A novel current detection algorithm for shunt active power filters in harmonic elimination, reactive power compensation and three-phase balancing , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[9]  T.G. Habetler,et al.  Optimum Space Vector Computation Technique for Direct Power Control , 2009, IEEE Transactions on Power Electronics.

[10]  M. Depenbrock,et al.  Concerning "Instantaneous power compensation in three-phase systems by using p-q-r theory" , 2004, IEEE Transactions on Power Electronics.

[11]  Qiang Song,et al.  Control of a Cascade STATCOM With Star Configuration Under Unbalanced Conditions , 2009, IEEE Transactions on Power Electronics.

[12]  G.K. Venayagamoorthy,et al.  Multiple Reference Frame-Based Control of Three-Phase PWM Boost Rectifiers under Unbalanced and Distorted Input Conditions , 2008, IEEE Transactions on Power Electronics.

[13]  Jose Restrepo,et al.  Advantages of the instantaneous reactive power definitions in three phase system measurement , 1999 .

[14]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..

[15]  V. T. Somasekhar,et al.  Pulse width-modulated switching strategy for the dynamic balancing of zero-sequence current for a dual-inverter fed open-end winding induction motor drive , 2007 .

[16]  S.K. Panda,et al.  Analysis of the Instantaneous Power Flow for Three-Phase PWM Boost Rectifier Under Unbalanced Supply Voltage Conditions , 2008, IEEE Transactions on Power Electronics.

[17]  P. Antoniewicz,et al.  Direct Power Control of an AFE Using Predictive Control , 2008, IEEE Transactions on Power Electronics.

[18]  Lie Xu,et al.  Improved Direct Power Control of Grid-Connected DC/AC Converters , 2009, IEEE Transactions on Power Electronics.

[19]  Santiago Arnaltes,et al.  A New Variable-Frequency Optimal Direct Power Control Algorithm , 2013, IEEE Transactions on Industrial Electronics.

[20]  M.K. Mishra,et al.  A Minimally Switched Control Algorithm forThree-Phase Four-Leg VSI Topology toCompensate Unbalanced and Nonlinear Load , 2008, IEEE Transactions on Power Electronics.

[21]  Alessandro Ferrero,et al.  A new approach to the definition of power components in three-phase systems under nonsinusoidal conditions , 1991 .

[22]  Xinjian Jiang,et al.  A novel active power quality compensator topology for electrified railway , 2004 .

[23]  P. Antoniewicz,et al.  Comparative study of two predictive direct power control algorithms for three-phase AC/DC converters , 2007, 2007 European Conference on Power Electronics and Applications.

[24]  Bin-Kwie Chen,et al.  Three phase models of specially connected transformers , 1996 .

[25]  A. M. Stankovic,et al.  Harmonic Study of the le Blanc Transformer for the Taiwan Railway Electrification System , 2002, IEEE Power Engineering Review.

[26]  Sy-Ruen Huang,et al.  Harmonic Study of the le Blanc Transformer for the Taiwan Railway Electrification System , 2002 .

[27]  J. C. Viola,et al.  Direct Power Control of a Dual Converter Operating as a Synchronous Rectifier , 2011, IEEE Transactions on Power Electronics.

[28]  M. Aredes,et al.  Comparisons Between the p--q and p--q--r Theories in Three-Phase Four-Wire Systems , 2009, IEEE Transactions on Power Electronics.

[29]  G. Superti-Furga,et al.  Discussion on Instantaneous $p$ – $q$ Strategiesfor Control of Active Filters , 2008 .

[30]  J Alonso-Martínez,et al.  Table-Based Direct Power Control: A Critical Review for Microgrid Applications , 2010, IEEE Transactions on Power Electronics.

[31]  Hirofumi Akagi,et al.  Instantaneous power theory and applications to power conditioning , 2007 .

[32]  Zhuo Sun,et al.  A novel active power quality compensator topology for electrified railway , 2004, IEEE Transactions on Power Electronics.

[33]  L.S. Czarnecki,et al.  Instantaneous reactive power p-q theory and power properties of three-phase systems , 2006, IEEE Transactions on Power Delivery.

[34]  Yongchang Zhang,et al.  Performance Improvement of Direct Power Control of PWM Rectifier With Simple Calculation , 2013, IEEE Transactions on Power Electronics.

[35]  John Shen,et al.  A Negative Sequence Compensation Method Based on a Two-Phase Three-Wire Converter for a High-Speed Railway Traction Power Supply System , 2012, IEEE Transactions on Power Electronics.