Transcript TCAS - ireeindia

TCAS – Indian Railway Train Control
System
By
Mahesh Mangal
Sr. ED/Signal/RDSO
26 July 2014
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Train Protection system on IR
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Auxiliary Warning System at Mumbai
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Working in Mumbai suburban since 1986.
Track Magnet based system working in Mumbai
suburban area (329 RKm), where trains run at a
Headway of 3 to 4 minutes
Opto coupler to interface & collect signal aspect
This system is now
getting
obsolete
and we have now
developed
a
advance
system
which
is
interoperable with
existing system.
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Train Protection & Warning System(TPWS)
• System is installed on Chennai –
Gummidipundi section of SR,
Nizamuddin – Agra section of
NR/NCR and on Metro Kolkatta.
• Works have been sanctioned for
suburban section of ER, SER, SR
& auto signalling sections (3330
RKM, 2362 onboard, Rs. 1737 cr).
• TPWS specification is based on
proven European Railway Traffic
Management System (ERTMS)
Level-1 configuration.
Even though the system is working, but lot of time has been taken
for customizing and it has not been possible to use system on
trains running at more than 120 kmph.
Anti Collision Device (ACD)
 Installed on 1800 Kms of BG section of N.F.
Railway in the year 2005-06
 It is GPS based non signalling system.
Train transmit their location and track ID and
if a dangerous event like collision is likely to
occur, automatically apply brakes and prevent
the collision or minimize the impact of
collision.
 Prevents head on/rear/side collisions.
 Provides station approach warning to drivers.
 Provides warning to road users at LC gates.
 Detects parting/jumbling of trains.
GPS
Satellites
UHF Data
Radio
Modem
IR
Loco
ACD
GPS Receiver
Loco
ACD
IR
To detect track ID in station, deviation count theory used
results in wrong identification and cause false alarm
resulting in operational and other problems. As such, not
been found effective and has not been proliferated.
Experience of IR with existing TPWS
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Requires lot of data entry at the start of train which is
inconvenient for existing loco pilots.
Braking is not optimized for mixed rolling stock on IR.
Intermittent update of MA results in un-necessary brake
intervention whenever signal aspect is updated on
approach.
Needs lot of cable and trackside electronics which are
failure prone.
The procedure for train trip or start is cumbersome and any
customization is not possible.
No protection is available in case on non interlocked
working.
Does not provide facility of SoS which is considered
essential as there are many collisions on IR due to
derailment obstructing other track.
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Development of Indigenous system
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RDSO started about 2 years ago to develop TCAS
to take care the problems of ACD installed on
NFR.
However, in this period, not only the system
developed takes care this problem but it also
provides Automatic Train Protections(ATP)
features as available in advance Train Control
systems like ETCS L1 & L2.
Multiple sources with interoperable product are
developed with IPR being shared by firm and
RDSO and cost of system is expected to be much
lower than ETCS and only marginally higher than
ACD.
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Comparison of ETCS & TCAS
Feature
ETCS L-1
ETCS L-2
TCAS
Cab Signalling
Yes
Yes
Yes
Line side signal
Required
Optional
Required
Continuous supervision
Yes
Yes
Yes
Continuous update
No
Yes
Yes
Suitable for Auto signal
Yes
Yes
Trials to be
conducted shortly
Collision prevention
No
No
Yes
SOS feature
No
No
Yes
SIL-4
Yes
Yes
Yes
Vulnerability to theft
Yes
No
No
Easy to operate
No
No
Yes
(independent of Signalling)
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TCAS - System configuration
Station
TCAS
Radio
Communication
GNSS/
GPS
Radio
Communication
Radio
Communication
Loco
TCAS
Loco
TCAS
RFID READER
RFID READER
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Features of TCAS
• Automatic Train Protection(ATP) FEATURES
• Detection and Prevention of SPAD
• Full cab signalling with Display of signal
aspect, movement authority, target distance
and speed
• Continuous train control
• Protection for Permanent and temporary
speed restriction.
• Detection of roll back
• TRAIN COLLISION FEATURES
• Head On
• Rear End Collision
• Side On Collision
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Additional features to improve safety
•
•
•
•
SOS from Loco and Station
Derailment Alert with auto generation of SOS
Automatic and Manual Brake Test
Continuous horn while approaching LC gate
or gang working.
• Detection of unusuals in interlocking like
signal cleared for occupied line or train
entered in wrong line etc. and controlling the
train.
• Live display of train movement with their
speed, location and any unusual in control
office.
STATION EQUIPMENT
• Station TCAS – Gathers
signaling inputs & loco
inputs
and
transmits
signaling inputs to Loco
TCAS
• Radio- For communication
with Locos
• SMI – Station
Master Interface
• GPS – For time
synchronization
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LOCO EQUIPMENT
• Loco unit – Gathers inputs from
RFID tags, speedometer and
Station.
• BIU – Brake Interface Unit
• DMI – For In-cab display of
signal aspect, TCAS status,
alarms and alerts, SOS buttons.
• Radio
&
AntennaFor
communication with stations
and other Locos
• RFID Reader- To read RFID
tags
• GPS and GPRS
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ON TRACK EQUIPMENT
• RFID Tags provided in block
section at every 1 km and
station yard for each track and
signals.
• Used for track identification,
correction of location of train
and identifying train direction.
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Status of present development
• Work for undertaking extended field trial on 250 RKM
section with 40 locomotives sanctioned.
• Section in Secundrabad division identified for trial.
• Section divided in three sub sections. Contract already
awarded to 3 firms.
TCAS
Territory
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Wadi
Status of present development
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Status of present development
• Two firms have successfully developed the system. Field
trials have been done by for 5-6 months.
• It has been also possible to achieve interoperability of
product developed by two vendors.
• Third Firm (Awarded the developmental work in Nov2013) has also tested their onboard equipment.
• Trial done on 4 stations with 4 Locos on 32 km Route-km,
with Brake Interface Unit and most of the important
features with interoperability tested.
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Scenarios tested in recent trials
• In Cab Display of Signalling related information
such as Movement Authority, Target Speed, Target
Distance, Signal Aspect etc.
• Brake Test : To assess braking characteristics of
train
• Prevention of SPAD
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PSR and TSR
Loop line speed control
Prevention of collisions in block section
SoS from loco and station
LC gate warning
Control of train for certain interlocking abnormalities.
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Current status
• After these trials, firms have manufactured the
final equipment and type testing is in progress.
The installation at stations, track and locomotives
likely by Sep, 2014.
• Extended trials with 40 locos and on 250 kms
sections will commence within 3 months.
• The present system being developed is suitable
for absolute block signalling and RDSO is also
working to upgrade this equipment later for
automatic signalling.
• Lab for testing interoperability and offline testing
of various scenarios has been setup at RDSO.
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Trial Video (10 Mins)
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THANKS