Catenary Voltage Support: Adopting Modern Locomotives With Active Line-Side Converters

This paper proposes a voltage support scheme for traction networks, which compensates for the voltage drop along the catenary line to which locomotives are connected. The proposed method is based on the injection of capacitive reactive power through the current controlled active line-side converter of locomotives. Comparing the catenary voltage with its reference value, the error is fed to a gain-scheduled PI-controller. The controller generates the q-axis reference value of the converter current, which is responsible for reactive power injection. The gain scheduling is carried out through identifying the parameters of the catenary line. The catenary parameters identification is performed by harmonic current injection and analyzing its impact on the catenary voltage. The performance of the proposed control strategy is evaluated in MATLAB/PLECS environment for a traction network consisting of one locomotive and two substations and moreover, for a two-locomotive three-substation traction network.

[1]  Remus Teodorescu,et al.  A New Single-Phase PLL Structure Based on Second Order Generalized Integrator , 2006 .

[2]  Petre Stoica,et al.  Decentralized Control , 2018, The Control Systems Handbook.

[3]  Frede Blaabjerg,et al.  Proportionalresonant controllers and filters for gridconnected voltagesource converters , 2006 .

[4]  Wang Guo,et al.  Analysis and Identification of Active Compensation Topology for Electrified Railway Load , 2008, 2008 International Conference on Intelligent Computation Technology and Automation (ICICTA).

[5]  Davide Lauria,et al.  Two-phase controlled compensator for alternating-current quality improvement of electrified railway systems , 2006 .

[6]  C. Abbate,et al.  Series connection of high power IGBT modules for traction applications , 2005, 2005 European Conference on Power Electronics and Applications.

[7]  Munaf Rahimo,et al.  High voltage semiconductor technologies , 2009, 2009 13th European Conference on Power Electronics and Applications.

[8]  R. Grunbaum.  FACTS for dynamic load balancing and voltage support in rail traction , 2007, 2007 European Conference on Power Electronics and Applications.

[9]  Alfred Rufer,et al.  Multivariable-PI-Based $dq$ Current Control of Voltage Source Converters With Superior Axis Decoupling Capability , 2011, IEEE Transactions on Industrial Electronics.

[10]  J. Dixon,et al.  Reactive Power Compensation Technologies: State-of-the-Art Review , 2005, Proceedings of the IEEE.

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

[12]  Tore Hägglund,et al.  Advances in Pid Control , 1999 .

[13]  P. Mutschler,et al.  Advanced control scheme for a single-phase PWM rectifier in traction applications , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[14]  Zeliang Shu,et al.  Single-Phase Back-To-Back Converter for Active Power Balancing, Reactive Power Compensation, and Harmonic Filtering in Traction Power System , 2011, IEEE Transactions on Power Electronics.

[15]  Poh Chiang Loh,et al.  A robust multilevel hybrid compensation system for 25 kV electrified railway applications , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[16]  Donald Grahame Holmes,et al.  Voltage form factor control and reactive power compensation in a 25 kV electrified railway system using a shunt active filter based on voltage detection , 2001, 4th IEEE International Conference on Power Electronics and Drive Systems. IEEE PEDS 2001 - Indonesia. Proceedings (Cat. No.01TH8594).

[17]  Alfred Rufer,et al.  Vector control of single-phase voltage source converters based on Fictive Axis Emulation , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[18]  Poh Chiang Loh,et al.  Optimal impedance termination of 25-kV electrified railway systems for improved power quality , 2005, IEEE Transactions on Power Delivery.

[19]  P. Barrade,et al.  A supercapacitor-based energy storage substation for voltage compensation in weak transportation networks , 2004, IEEE Transactions on Power Delivery.

[20]  Fabrizio Giulio Luca Pilo,et al.  Voltage regulation on 25 kV AC railway systems by using thyristor switched capacitor , 2000, Ninth International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.00EX441).

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