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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