Grounding Points Model for Power Flow Applied to an Autotransformer Configuration Railway

Electrified Urban Massive Transportation Railway Systems require the supply of electric power that conforms to electromagnetic standards, safety levels and operational regulations. This paper presents a mathematical modelling of substations, autotransformers, power lines, and trains for a dual 50 kV AC railway system. The innovation of this study lies on the introduction of grounding points to reduce the rail voltage induction and assure appropriate safety levels. This study incorporates a description of Carson's Line in order to model accurately the self and mutual impedances between the conductors of the railway system. The results prove the effectiveness of the presented model with respect to grounding and safety.

[1]  Sheng Li,et al.  Power flow controller design for planning stage railway systems , 2017 .

[2]  R. J. Hill.  Electric railway traction. Part 3. Traction power supplies , 1994 .

[3]  Xiang Gao,et al.  A Power Factor-Oriented Railway Power Flow Controller for Power Quality Improvement in Electrical Railway Power System , 2017, IEEE Transactions on Industrial Electronics.

[4]  A. Cozza,et al.  On the Modeling of Electric Railway Lines for the Assessment of Infrastructure Impact in Radiated Emission Tests of Rolling Stock , 2008, IEEE Transactions on Electromagnetic Compatibility.

[5]  Sisi Li.  Power flow in railway electrification power system , 2010 .

[6]  Thanatchai Kulworawanichpong.  Optimising AC electric railway power flows with power electronic control , 2004 .

[7]  Z. Q. Zhu,et al.  Power Electronic Transformer-Based Railway Traction Systems: Challenges and Opportunities , 2017, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[8]  Imtithal Mohammed Abdulaziz,et al.  Mathematical modelling and computer simulations of induced voltage calculations in AC electric traction , 2003 .

[9]  J. L. Guardado,et al.  Accurate and Approximate Evaluation of Power-Line Earth Impedances Through the Carson Integral , 2017, IEEE Transactions on Electromagnetic Compatibility.

[10]  Bassam Mohamed,et al.  Current injection based Power Flow Algorithm for bilevel 2×25kV railway systems , 2016, 2016 IEEE Power and Energy Society General Meeting (PESGM).

[11]  Pietro Tricoli,et al.  Advanced Electrification Systems with Static Converters for AC Railways , 2016 .

[12]  Jako Kilter,et al.  Modelling of high-speed electrical railway system for transmission network voltage quality analysis: Rail Baltic case study , 2014, 2014 Electric Power Quality and Supply Reliability Conference (PQ).