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AGUAS
ARGENTINAS:
supervision
distributed over an internal network.
Aguas
Argentinas is the company entrusted with drinkable water distribution
and treatment for the urban area of one of the largest franchises in the
world: the city of Buenos Aires.
With
a large number of operating centres spread over the city of Buenos Aires,
representing over thirty supervision stations, Aguas Argentinas wished
to prepare for the future a system in which all the operating data would
be accessible from the various centres. In addition, they needed an information
processing system ensuring perfect control of the distribution network’s
hydraulic operation.
Aguas
Argentinas entrusted the study of this project to two engineering consultant
firms specialised in information processing: CITI (Lyonnaise des Eaux)
and ADASA Sistemas (Agbar). It was then decided to use the existing WAN
(Wide Area Network) corporate network to interconnect all the supervision
and data collection stations.
During 1997, Aguas Argentinas assisted by ADASA Sistemas performed the
first installations of the new system :
- Installation
of autonomous data loggers (Octopus d’Hydreka) which store a
series of pressure measurements before transmitting it over the telephone
to each operating centre. These recorders are characterised by their
easy installation and their automatic call function in the case of
low pressure alarms
- Recovery
of the data by the TOPKAPI
stations of the first 2 centres, creating a pressure monitoring distributed
system
- Concentration
of all the information in a TOPKAPI
station
called Central Supervisor (CS) via Aguas Argentinas’ WAN corporate
network.
- Integration
of the existing systems as being CS subsystems using TOPKAPI’s
Client/Server features
- Installation
of a Technical Database server (Oracle) fed automatically by the CS
- Implementation
of a prototype system generating automatically pressure plots on a
map background
- Redistribution
of the information via Client stations able to access the TOPKAPI
and other isobar maps via the WAN.
For
many reasons, TOPKAPI
is particularly
well suited to this type of architecture based on a distributed processing
of the information :
- integration
within the same system of the supervision and data collection functions
for heterogeneous remote automation and measurement facilities connected
locally or remotely via the telephone network
- application
client/server architecture enabling to interrogate globally any other
network application
- client/server
operation supporting low rate links; low requirements in terms of
network rate, enabling the connection of a large number of stations
without overloading the network.
In
the short term, the project must be extended with the creation of a Data
Warehouse in order to distribute the information via an Intranet network,
with easy access to information using browsers.
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