Study of ATP (Automatic Train Protection System /ALSTOM) for Delhi MRTSMahesh C.YadavAESTE/Signal/Railway BoardUnder guidance of Sh Praveen KumarCourse Director- Sh Amit Jain PSIRISET

Metro Rail

Delhi Metro Network Phase ILine 1 (Rail Corridor), 22 Km in LengthElevated/ SurfaceShahdara RithalaR1 Section Shahdara Tis Hazari R2 Section Tis Hazari Tri NagarR3 Section Tri Nagar RithalaLine 2 (Metro Corridor), 11 Km in LengthUndergroundVishava Vidayalaya Central SecretariatM1 Section Vishava Vidayalaya Kashmere Gate M2 Section Kashmere Gate Central Secretariat

Delhi Metro Network Phase I (cont..)Line 3 (East West Corridor)Mostly Elevated23 Km in Length Indraprath Dwarka

Train Control & Signaling System for Delhi MetroComputer Based InterlockingContinuous Automatic Train Control (CATC)Automatic Train Protection (ATP) Distance to Go with Track to Train communication through Coded AFTC with Cab SignallingAutomatic Train Supervision (ATS) Automatic Route Setting; Automatic train Regulation Centralized control from Operational Control CentreAutomatic 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 drivers 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, (ASMs 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, (Drivers duty)Passenger Safety by door opening / closing, Emergency stop(Guards 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 CATCOperation 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 SignallingTrack Related Speed Profile generation based on line data and train data continuously along the trackContinuous monitoring of braking curve with respect to a defined target pointMonitoring of maximum permitted speed on the line and speed restrictions in forceDetection of over-speed with audio visual warning and application of brakes, if necessaryMaintaining safety distance between trainsMonitoring of stopping pointMonitoring of Direction of Travel and RollbackReleasing doors on the correct side of the platform when train comes to a stop

ATP Sub-Systems OCCWS-ATPWS-ATPWS-ATPTrack to train communication SSISSISSIOn board ATPTCTTCTC

Track to Train CommunicationCoded 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 functionsEnsures 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

station

ESP

beacon

ASCV

Trackside ATP-ATO

Central ATS (CATS)

Local ATS (LATS)

point machine

transmission Train to track

TrainborneATP-ATO

HMI for local control

OCC

transmission track to Train

Cab Signalling Drivers MMI

RM (FOR)

SM (ATP)

ATO

Off

Diagnostic

Off

Service Brake

Off

EmergencyBrake

Off

Train Hold

Off

Off

Off

Train Departure

Off

Start-up: After successful auto-tests

Docked

Off

StationService

Failure

Active

Off

Running Order

Off

Off

Failure

Off

SpeedOrder

Flashing Green

Supervision

Flashing Green

Automatic

Fixed Red

Restriction

100

km/h

80

60

40

20

0

AREA 1 : ATC driving indications (SYS1)

Fixed Green

Spare

Axle locked

Front ATC

AREA 3 : Partial view of door management indications (RS1)

AREA 4 : mode selector (RS1)

AREA 2 : ATC maintenance indications (SYS1)

OFF

Off

Rear ATC

DoorsClosed

Off

Active

Flashing Yellow

SideServiceRight

Off

SideServiceLeft

Movement of Trains in ATP

ATP system initialisationTo 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

Modes of Train RunningATO or AutoOnly on Metro CorridorATP or SM (Supervised Manual) or MCS (Manual Cab Signal)ROS (Running On Sight)On failure of ATP modeMax. Speed will be limited to 25 kmph by ATPRM (Restricted Manual)In DepotMax. Speed will be limited to 25 kmph by ATPCut Out ModeOn complete failure of ATP EquipmentMax. Speed will be limited to 25 kmph by Rolling Stock

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 authorised speed, the EB is triggered.

:

Operation in Main Line:Train Movement MonitoringATP 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 MonitoringROS (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 authorised speed, the EB is triggered

AT

ROS Driving Mode ManagementTrack circuit failed

This mode is used for passing a zone that has NO transmission of 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

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 CATCIt 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

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