Safe Rail Traffic Control Jrn Pachl Technische Universitt - - PowerPoint PPT Presentation

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Safe Rail Traffic Control Jrn Pachl Technische Universitt - - PowerPoint PPT Presentation

Nov 17, 2022 35 likes •506 views

Safe Rail Traffic Control Jrn Pachl Technische Universitt Braunschweig Contents 1 Basic characteristics of a railway system 2 Safe train separation (Block systems) 3 Safe routes on turnouts and crossing (Interlocking) 4 Automatic train

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Safe Rail Traffic Control

Jörn Pachl

Technische Universität Braunschweig

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Contents

1 Basic characteristics of a railway system 2 Safe train separation (Block systems) 3 Safe routes on turnouts and crossing (Interlocking) 4 Automatic train protection (ATP)

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Eddy-current Brake on an ICE 3

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The Role of the Infrastructure Operator

Solving conflicts between train movements (dispatching) Providing safe track sections to be used by train movement Issuing movement authority to enter a track section

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Core Safety Functions in Rail Traffic Control

Safe train separation (avoiding crashes between following and opposing movements) Safe routes on turnouts and crossing (avoiding accidents on movable track elements and intersections) Automatic Train Protection (ATP) (preventing trains from violating authority limits)

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S dbrake,2 d

2nd Train 1st Train

S dbrake,max d lBlock

2nd Train 1st Train

Basic Principles of Safe Train Separation

a) Moving block b) Fixed block

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Block Technologies

Manual block (human operators still responsible for checking train completeness) Automatic block (Track clear detection effected automatically)

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a) Singel-coil type b) Transformer type

Impedance Bonds

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All points must be properly set and locked before a signal can be cleared for a train. All points must be kept locked as long a train has authority to move on them. Signals that authorise conflicting movements must be locked in stop position. The route must be protected against inadvertent movements on converging tracks.

Interlocking Functions

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Points Point machine

Frog Guiding rails

Fouling point indicator

Straight route Diverging route

Point machines Double frog

Turnout Rigid crossing Movable point crossing

Turnouts and Crossings

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Shunting signal

a) Stop signals b) Safety points c) Derailing devices

Flank protection devices

Main signal

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Block Derail with Position Indicators

Berlin-Spandau 2009

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Mechanical leverframes Power frames Computer-based interlocking Relay interlocking

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Screenshots from Control Screens of different European Countries

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ETCS Level 1 Intermittent ATP with Eurobalise transponders, Trains either governed by cab signalling (full supervision mode)

  • r lineside signal with ATP as background protection (limited

supervision mode) ETCS Level 2 Continuous ATP with radio transmission of control data (GSM-R), Eurobalises as reference points for train location, Train separation by fixed block without lineside signals ETCS Level 3 Same as Level 2 but with moving block, Requires on-board checking of train integrity

ETCS Levels

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GSM-R mast ETCS block marker board with auxiliary athority light Eurobalise

  • n track
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