RAIL SIGNALING OVER TETRA IN MOZAMBIQUE
With a mission to transform natural resources into prosperity and sustainable development, VALE (Brazilian mining company) is investing heavily in Mozambique in order to, among other issues, transport Moatize’s mine output. VALE is building the Nacala Corridor, which will link Moatize to the Port of Nacala and work with a TETRA communication system to provide voice and data functions.
The Nacala railway corridor project is intended to provide a logistics solution for the transportation of coal from the Moatize Mine, in Mozambique’s Tete province, to the maritime terminal in Nacala, on the Indian Ocean, through a new 912 km-long railway corridor which pass through Mozambican jungle and Malawi.
CHALLENGE: SIGNALING OVER TETRA
Given the strategic importance of both lines, the main challenge is providing systems that would allow security and train speeds to be increased, and thereby reduce operating costs for freight transport. These railway control systems require the support of a robust and reliable communications system, which shall be based on radio technology in order to reduce the wayside equipment, which, given the characteristics of the environment it is difficult to deploy and presents high maintenance costs.
At that point, TELTRONIC and Siemens will participate in the project by providing the TETRA communications system and the signaling Positive Train Control (PTC) system respectively. Thus, PTC equipment will use TETRA digital radio communications network to communicate its wayside and mobile parts and hence, monitor and control train actions.
The communications solution proposed by TELTRONIC allows VALE to get the maximum performance of the system: By means of a single and unified communications infrastructure with maximum availability is provided service to all applications and railway systems such as signaling applications, wheel bearing temperature supervision system, derailment system and voice services to provide communications between drivers and other groups of users.
The solution deployed in Nacala Corridor is based on the NEBULA TETRA infrastructure. 100% Ethernet IP architecture provides high flexibility in the solution design, as well as an easy management and maintenance.
The on-board TETRA equipment provided has been designed following the recommendations of several signaling systems manufacturers. It presents an Ethernet link to be connected to the vital on-board computer and then, establish data transmission sessions with the object controllers and interlockings distributed along the tracks.
The control center user interface is based on TELTRONIC’s CeCo-TRANS system, which is designed for the railway environment, and allows displaying and interaction with the trains by means of a synoptic line display. The application allows operators to display the train fleet positions in real-time.
CONCLUSIONS & BENEFITS
Based on the vast experience obtained and dominant position achieved in the transportation sector over the past decade, TELTRONIC has got to introduce its widespread solutions based on TETRA technology into other application areas: Rail signaling sector, which, for various reasons, up to now has relied on other systems for communication.
With Nacala Corridor project, TELTRONIC has proven TETRA technical viability to offer safe and efficient communications in the railway environment, providing voice, operational data (location, alarm and event management) and PTC signaling data over a single infrastructure. This experience may be applicable to other transportation environments with signaling systems based on different existing protocols such as ETCS or CBTC.
SISTEMS & APPLICATIONS
“The collaboration with Teltronic has been really interesting due to the technological capabilities they provide. The fact that they develop themselves the products from scratch is a great advantage when developing projects”.Luis Candeias, Moatize-Nacala Corridor Siemens Project Manager