Train-track communication via overhead line
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RESEARCH POSTER PRESENTATION DESIGN © 2012 www.PosterPresentations.com Railway signaling system usually based on the communications-based train control system to provide a communication between train, track monitoring devices and railway control center. Power Line Communication is a communication method to transfer both data and electrical power at the same electrical wire. High data rate narrowband power line communication and broadband power line communication are two main types of power line communication. They can transfer signal in a range of serval kilometers in low to medium voltage environment in various frequency and data rate. Therefore, the power line communication may be applied in the train-track communication Introduction Objective Technical details of narrowband power line communication: Methodology and result AC 25kV coupling circuit: Acknowledgment To research the feasibility of the power line communication for Train-Track communication via overhead wire. To propose a design in Train-Track communication via overhead wire. To research the capability of the power line communication for Train-Track communication via overhead wire. Lee Wai Kit 14075007D Train-track communication via overhead line Background SelTrac is one of the communications-based train control system that using inductive loop to provide communication between the train and the control center. Traction system: Types Voltage AC 15kV, 16.7Hz 25kV, 50/60Hz DC 750V 1500V 3000V Overhead wire in railway electrification system: Overview of Power line communication: Low Data Rate Narrow Band High Data Rate Narrow Band Broad Band Data rate About 100bps 1kbps – 500kbps 1mbps-500mbps Frequency Below 3kHz 3-500kHz 1.8-250MHz Operational Range Hundreds of kilometers Up to serval kilometers 50 to 1000 meters PRIME G3-PLC IEEE 1901.2 (G3-FCC) Frequency range 42kHz to 88kHz 35.9kHz to 90.6kHz 145.3 kHz to 478.1 kHz Data rate Up to 128.6kbps Up to 34.16kbps Up to 500kbps Modulation differential encoding DBSK, DQPSK, D8PSK DBPSK, DQPSK DBSK, DQPSK, D8PSK etc. Coupling circuit of transmitter Coupling circuit of receiver Sampling frequency 600 kHz Number of the carriers 128 Duration of cyclic prefix 75μs cardinality of ! "# 72 Frequency of the first carrier 145.3 kHz Frequency of the last carrier 478.1 kHz Modulation scheme for both AC and DC circuit: DC 750V coupling circuit : Acknowledgement Professor Lee has been very supportive throughout the project that began in August last year. Professor Lee provided a lot of valuable suggestions and advices to me during the project. The advices and suggestions helped me to find the right way to finish the project and inspired me in modulation and the coupling aspect. I would like to express my gratitude to Professor Lee.
Transcript of Train-track communication via overhead line
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RESEARCH POSTER PRESENTATION DESIGN © 2012
www.PosterPresentations.com
Railway signaling system usually based on the communications-based train control system to provide a communication between train, track monitoring devices and railway control center. Power Line Communication is a communication method to transfer both data and electrical power at the same electrical wire. High data rate narrowband power line communication and broadband power line communication are two main types of power line communication. They can transfer signal in a range of serval kilometers in low to medium voltage environment in various frequency and data rate. Therefore, the power line communication may be applied in the train-track communication
Introduction
Objective
Technical details of narrowband power line communication:
Methodology and result
AC 25kV coupling circuit:
Acknowledgment
To research the feasibility of the power line communication for Train-Track communication via overhead wire. To propose a design in Train-Track communication via overhead wire.To research the capability of the power line communication for Train-Track communication via overhead wire.
Lee Wai Kit 14075007D
Train-track communication via overhead line
Background
SelTrac is one of the communications-based train control system that using inductive loop to provide communication between the train and the control center.
Traction system:
Types Voltage
AC 15kV, 16.7Hz
25kV, 50/60Hz
DC 750V
1500V
3000V
Overhead wire in railway electrification system:
Overview of Power line communication:
Low Data Rate
Narrow Band
High Data Rate
Narrow Band
Broad Band
Data rate About 100bps 1kbps – 500kbps 1mbps-500mbps
Frequency Below 3kHz 3-500kHz 1.8-250MHz
Operational Range Hundreds of
kilometers
Up to serval
kilometers
50 to 1000 meters
PRIME G3-PLC IEEE 1901.2 (G3-FCC)
Frequency range 42kHz to 88kHz 35.9kHz to 90.6kHz 145.3 kHz to 478.1 kHz
Data rate Up to 128.6kbps Up to 34.16kbps Up to 500kbps
Modulation differential
encoding
DBSK, DQPSK, D8PSK DBPSK, DQPSK DBSK, DQPSK, D8PSK etc.
Coupling circuit of transmitter
Coupling circuit of receiver
Sampling frequency 600 kHz
Number of the carriers 128
Duration of cyclic prefix 75μs
cardinality of !"# 72
Frequency of the first carrier 145.3 kHz
Frequency of the last carrier 478.1 kHz
Modulation scheme for both AC and DC circuit:
DC 750V coupling circuit :
Acknowledgement
Professor Lee has been very supportive throughout the project that began in August last year. Professor Lee provided a lot of valuable suggestions and advices to me during the project. The advices and suggestions helped me to find the right way to finish the project and inspired me in modulation and the coupling aspect. I would like to express my gratitude to Professor Lee.
