dmrc

Study of ATP (Automatic Train Protection System /ALSTOM) for

Delhi MRTSMahesh C.Yadav

AESTE/Signal/Railway Board

Under guidance of

Sh Praveen Kumar

Course Director- Sh Amit Jain PS

IRISET

Metro Rail

Delhi Metro Network – Phase I

• Line 1 (Rail Corridor), 22 Km in Length– Elevated/ Surface– Shahdara – Rithala

• R1 Section – Shahdara – Tis Hazari • R2 Section – Tis Hazari – Tri Nagar• R3 Section – Tri Nagar – Rithala

• Line 2 (Metro Corridor), 11 Km in Length– Underground– Vishava Vidayalaya – Central Secretariat

• M1 Section – Vishava Vidayalaya – Kashmere Gate • M2 Section – Kashmere Gate – Central Secretariat

Delhi Metro Network – Phase I (cont..)

• Line 3 (East – West Corridor)– Mostly Elevated– 23 Km in Length – Indraprath – Dwarka

Train Control & Signaling System for Delhi Metro

• Computer Based Interlocking• Continuous Automatic Train Control (CATC)

– Automatic Train Protection (ATP) • Distance to Go with Track to Train communication through

Coded AFTC with Cab Signalling

– Automatic Train Supervision (ATS) • Automatic Route Setting; Automatic train Regulation • Centralized control from Operational Control Centre

– Automatic Train Operation (ATO)• For Metro corridor only

Continuous Automatic Train Control System (CATC)

Consists of

• 1. Automatic Train Protection (ATP)

2. Automatic Train Supervision (ATS)

3. Automatic Train Operation (ATO)

Why CATC ?Limitations of Conventional Signaling

Does not indicate• speed to go, distance to go, exact location

of the train, gradient of track in ahead, position of door opening/closing of coach.

• Visibility depends on curvature & weather.• No control on driver’s mistake.• Higher margin in speed, distance between

two trains to be kept.• No optimum utilisation of system. • Results in lesser safety & headway.

What CATC Does ?

• Auto Route setting, Auto train separation, (ASM’s duty).

• Cab signaling, broken rail detection,Indicates permitted speed.

• Auto start, Over speed protection, Auto stop, Auto coasting, stops train if door opens, over speed alarm, (Driver’s duty)

• Passenger Safety by door opening / closing, Emergency stop(Guard’s duty)

What is CATC ?

• Traffic micro-regulation, Time Table Generation(Control Office Job)

• Passenger information display (Commercial Job).

• Maintenance monitoring, Crew performance Monitoring (Managerial Job)

CATC

It is not only a Signaling System

It is an integrated train control system.

SUB- Systems of CATC

• Operation Control Center (OCC).

• Communication Channel from OCC to way side ATP sub-system.

• Way Side ATP System (at stations).

• On Board ATP equipment (on train).

• Track to Train communication-AFTC(track side)

• Solid State Interlocking (SSI)

Automatic Train Protection (ATP)

– Cab Signalling– Track Related Speed Profile generation based on line data and

train data continuously along the track– Continuous monitoring of braking curve with respect to a defined

target point– Monitoring of maximum permitted speed on the line and speed

restrictions in force– Detection of over-speed with audio visual warning and

application of brakes, if necessary– Maintaining safety distance between trains– Monitoring of stopping point– Monitoring of Direction of Travel and Rollback– Releasing doors on the correct side of the platform when train

comes to a stop

ATP Sub-Systems

•

OCC

WS-ATP WS-ATP WS-ATP

Track to train communication

SSI SSI SSI

On board ATP

TC

T

TC TC

Track to Train Communication

Coded Audio Frequency Track Circuit

• Detects train occupation on track.

• Transmission of message to give advance information about status of track, points, route, signals, block, headway regulation, platform side, stoppage . . .

Trainborne ATP-ATO functions

• Ensures train location based on odometer and trackside beacons.

• Emergency braking control.• Receives information from WS-ATP about

section ahead.• Door opening authorization.• Controls train motion, departure order,event

logging, maintenance monitoring, …..

SYSTEM OVERVIEW

Cab Signalling – Driver’s MMI

S t a r t - u p : A f t e r s u c c e s s f u l a u t o - t e s t s

S i d eS e r v i c e

L e f t

O f f

S i d eS e r v i c e

R i g h t

O f f

D o o r sC l o s e d

F i x e d G r e e n

A R E A 1 : A T C d r i v i n g i n d i c a t i o n s ( S Y S 1 )

R e s t r i c t i o n

F i x e d R e d

A u t o m a t i c

F l a s h i n g G r e e n

S u p e r v i s i o n

F l a s h i n g G r e e n

S p e e dO r d e r

O f f

R u n n i n gO r d e r

O f f

S t a t i o nS e r v i c e

O f f

D o c k e d

O f f

T r a i nD e p a r t u r e

O f f

T r a i n H o l d

O f f

E m e r g e n c yB r a k e

O f f

S e r v i c eB r a k e

O f f

D i a g n o s t i c

O f f

A T O

S M ( A T P )

R M ( F O R )

O F F

A T P

A R E A 2 : A T C m a i n t e n a n c e i n d i c a t i o n s ( S Y S 1 )

A R E A 4 : m o d es e l e c t o r ( R S 1 )

A R E A 3 : P a r t i a l v i e w o f d o o r m a n a g e m e n ti n d i c a t i o n s ( R S 1 )

F r o n t A T CA x l e

l o c k e d

S p a r e

O f f

O f fF l a s h i n g Y e l l o w

A c t i v e

R e a r A T C

O f f

A c t i v e F a i l u r e

O f f

F a i l u r e

O f f

0

2 0

4 0 6 0

8 0

k m / h

1 0 0

Movement of Trains in ATP

ATP system initialisation

• To be fully operational ATP system needs:

• -1-To receive Information from ATC trackside equipment,

• This operation can be performed by two ways :• stationary initialisation • moving initialisation

• -2-To calibrate the odometer

1. ATO or Auto– Only on Metro Corridor

2. ATP or SM (Supervised Manual) or MCS (Manual Cab Signal)

3. ROS (Running On Sight)– On failure of ATP mode– Max. Speed will be limited to 25 kmph by ATP

4. RM (Restricted Manual)– In Depot– Max. Speed will be limited to 25 kmph by ATP

5. Cut Out Mode– On complete failure of ATP Equipment– Max. Speed will be limited to 25 kmph by Rolling Stock

Modes of Train Running

Speed Monitoring Operation in Main Line:

Train Movement MonitoringATP insures that:1-In MCS Mode:

Maximum train speed is 80 KphOr

Maximum train speed = PSR speed value (Permanent Speed Restriction)

Or Maximum train speed = TSR speed value ( Temporary

Speed Restriaction)As soon as the train speed is higher than the maximum As soon as the train speed is higher than the maximum

authorised speed, the EB is triggeredauthorised speed, the EB is triggered..

:

Operation in Main Line:Train Movement Monitoring

• ATP Ensures:– In MCS Mode :

• The Total energy of the train can be absorbed by the braking force

– In ROS Mode :This function is not performed by ATP system

• Energy monitoring

Train Movement Monitoring

ROS (Running on sight )supervision:

• ATP Ensures that:–In ROS Mode:

• Maximum train speed is 25 Kph• Position of mode selector is SM (ATP)

– As soon as the train speed is higher than the maximum As soon as the train speed is higher than the maximum authorised speed, the EB is triggeredauthorised speed, the EB is triggered

AT

• Track circuit failedTrack circuit failed

• This mode is used for passing a zone that has NO transmission of This mode is used for passing a zone that has NO transmission of • cab signal information (failure situation)cab signal information (failure situation)•

• Train is stopped in front of a restrictive ATP limit

• ROS is activated by an aware action of the driver, by • pressing the ROS push-button after authorisation,

– Note : Mode selector has first to be switched out of – ATP and back.

• If the localisation is not lost, as soon as the train is on an • operating track circuit, the MCS driving mode is automatically • activated

ROS Driving Mode Management

HIGH LIGHTS

• Cab signal Proceed is given by MCS mode :

– Target speed is non zero– Supervision indicator is Green – Target speed includes speed restrictions– Stopping positions are given by marker boards

• Note on signals :– Line signal can be Green, Blue , Blank – will be no cab signal proceed with red signal

Maintenance Precautions for CATC

It is a Major Computer Network System with multi discipline users.

• Protect from Password - unauthorized person must not modify any parameter.

• Needs Sincere maintenance.

• Protect from virus.

• Skilled Maintenance staff.

• Thorough testing before commissioning.

Signal Equipment ROOM

OCC Theatre

THANK YOU