Project Management Shet

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					    Application Sheet: Utilities – Water Mgt. System. Ref U-04
    Subject: Water Management System in Sri Lanka


Application Sheet: Water Management System
Subject: Sri Lanka

Introduction

In April 2006, Brodersen completed a successful Factory Acceptance Test for a Water
Management System in the eastern part of Sri Lanka. The system which remotely monitors
and controls the water supply consists of data-logging RTUs and radios as well as a PC-
based SCADA system. Brodersen has previously delivered large scale water management
systems to English Water companies such as Anglian Water and Yorkshire Water, but this
is the first time Brodersen delivers a project to Sri Lanka. The end customer is the National
Water Supply and Drainage Board.

Application Description




Area in the Eastern part of Sri Lanka where the project is being carried out.
      Application Sheet: Utilities – Water Mgt. System. Ref U-04
      Subject: Water Management System in Sri Lanka




Overview of the overall water supply network. When the network is fully installed it will include
about 40 RTUs situated in 40 locations with communicating via radio.

This project is one of many water projects currently being carried out in Sri Lanka,
funded by institutions such as the World bank. The lead time is long and it is about 4
years ago that Brodersen was first contacted regarding this project. In the meantime,
Sri Lanka has been hit by the tsunami disaster and because of the size of the project, it
will be a further 5 years before the project is completed. The complete project scope
includes constructing 30 water towers, 7 water reservoirs and about 250km main pipe
line.

Radio-based data collection

The Sri Lanka project is based on Brodersen RTUs with in-built radio. The radios
communicate on a dedicated UHF-frequency and in this particular project the RTUs
include many special in-built features. A radio survey, based on information available
on the internet, was carried out and it was concluded that it would be difficult to obtain
direct radio communication with the most remote locations. It was therefore decided to
let the RTU act as a relay station, and in some cases data is sent via two radiohubs
before it reaches the receiver.

The radios communicate via an optimized protocol, and the master radio updates all
units and reports actual field strength and communication errors on a continual basis.
Even the power of the transmitter can be changed using the communication protocol,
and it is therefore easy to start the system and then find errors in the system at a later
stage. The radio can if needed automatically retransmit information to other modules
that lie outside the normal range of the main station. In this particular project, this
feature is used. The antenna on a 80m tall water tower is used to send data to
substations as well as sending data from a station located on the periphery to a couple
of remote installations.
                                                                   Brodersen Controls A/S
      Application Sheet: Utilities – Water Mgt. System. Ref U-04
      Subject: Water Management System in Sri Lanka




Compact RTU with built-in IO for measuring signals and remote control. The RTU has an in-built
UHF radio unit which sends/receives. A total of 11 RTUs are being used in phase 1 of the project.




Example of a topography curve which verifies that there is a “line of sight” between two radio
locations.




                                                                 Brodersen Controls A/S
      Application Sheet: Utilities – Water Mgt. System. Ref U-04
      Subject: Water Management System in Sri Lanka




SCADA picture displaying overview of radio system, that allows the operator to view the signal
strength for each RTU and verify that all radio signals are OK. In case of errors, the
communication lines become red making it quick and easy to get an overview of errors.




Diagram of a part of the water supply network in the Ampara district.
1. Point of extraction where the water is pumped from two lakes and is then cleaned. This is also
where the central control room is located.
2. Radiolink where an RTU, placed on a tall water tower, is used as a relay station which
retransmits data to remote installations.

                                                                 Brodersen Controls A/S
     Application Sheet: Utilities – Water Mgt. System. Ref U-04
     Subject: Water Management System in Sri Lanka


zenOn – a toolbox for advanced automation solutions
Brodersen has chosen to use the zenOn SCADA system, which is one of the most
technologically advanced SCADA systems on the market. It has been developed by
the Austrian company, Copa-Data, who have a very close working relationship with
Brodersen.

The water management system being delivered to Sri Lanka includes a user interface
that allows the operators to zoom in on specific installations and display curves
regarding level, flow and pressure at a given point in time. Alarms are logged likewise
with a timestamp. One of the outstanding features of zenOn is the open structure which
allows connecting via the network and integration with databases such as SQL. The
option of adding clients via the internet opens up endless possibilities.




Overview picture from SCADA system displaying water towers and pumping stations



Virtual FAT test via Internet
When delivering this type of project, a Factory Acceptance Test is usually carried out in
the customer’s presence. In this case, this meant extensive travel costs and Brodersen
therefore chose to take advantage of some of the zenOn features and options, namely
transferring SCADA images over the internet.

This meant that the local system integrator and the end user could sit in Sri Lanka and
test the system with all the RTUs connected. zenOn has a web functionality which
converts “normal” screenshots to an optismised html format online. This means having


                                                            Brodersen Controls A/S
      Application Sheet: Utilities – Water Mgt. System. Ref U-04
      Subject: Water Management System in Sri Lanka
access to the SCADA system through Internet Explorer via a completely standard
internet connection.




The photo shows the test set-up with some of the modules being tested before they were sent to
Sri Lanka. Via the internet, the customer was able to follow the test from the other side of the
world.

The virtual FAT test was successful and Brodersen’s water management system was
accepted with only a few minor changes. The usage of the internet in this way has
been such a success that Brodersen is considering making this a permanent part of the
procedure when handing over projects, as it is extremely cost effective as well as
having the advantage that the customer gets the opportunity to see what the solution
will look like at a much earlier stage. This enables the customer to potentially change
the design to tailor the solution to his needs at the early stages of the project

The web funcationality in zenOn can obviously also be used in the standard way, and
Brodersen has sold several zenOn systems where this is used. This allows
maintenance or security staff to gain access to the SCADA system from their home PC
and they can therefore quickly and easily follow what’s happening, even outside normal
working hours.

The Sri Lanka project is now ready for the next phase, where hardware and software
will be installed on-site in Sri Lanka. For this phase, Brodersen will be working with a
local system integrator.

References:
•   Anglian Water
•   Yorkshire Water
•   Logica
•   LATAKIA Water - Syria
•   Ministry of Works - Bahrain


                                                                 Brodersen Controls A/S

				
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