MESKI – Mersin Drinking Water Distribution, Automation and SCADA System
The Mersin Water and Sewerage Administration (MESKI) is a 100 % publicly-owned company located at the Mediterranean Sea, in the southern part of Turkey. The city of Mersin has about 800,000 inhabitants and is the operator and owner of the drinking water distribution and wastewater treatment plant. In 2011, MESKI awarded the contract for the renovation of the existing system, including expansions and the automation of the whole drinking water distribution system by means of a SCADA system.
The scope of work included the provision and installation of a redundant SCADA system, the supply and installation of RTUs (including the programming of PLCs) in the existing and new pumping stations, as well as the installation of a communication system.
The contract also included the installation of valves, flow measurement, pressure measurement and chlorine measurement chambers.
Furthermore, it included the construction of the SCADA operating building centre near the headquarters of MESKI, as well as all mechanical and civil works for the complete project.
IDS established a Joint Venture together with the company Piomak, which has been an expert in the water sector of several decades’ standing. IDS, as the joint venture leader, supplied the SCADA system and the RTUs.
The 120 RTUs in the field communicate via radio modems (IEC 60870-5-104 protocol) with two IDS 850 front-end-computers, which, in turn, communicate with the redundant SCADA system.
The UHF communication system has three repeater stations.
The system is controlled by redundant SCADA servers and two operator workstations. Besides the basic functions, the web server with 30 users, the basic functionalities and a reservoir management software was commissioned.
In addition to the two workstations, a large-screen projection system was supplied. With this system, operators are able to monitor the water flow and all statuses at any time and act immediately in case of faults in the distribution system.
The PLC regulates a variable pumping operation. There are several reservoirs connected in a line, and if e. g. the water level of reservoir one is down the pumps will be activated to bring it back to the required level. The PLC also controls the operating time equalization of each pump and monitors the status of the pumps. If a pump is not working properly, another one will be switched on it its stead.
Additional Facts and Figures:
- 9 pumping stations
- 11 reservoir stations,111 measurement and valve control points
- 65 new measurement points including çivil and mechanical works
- Pipe and valve replacement at 4 reservoir control rooms
- Installation of 78 pressure meters, 12 level meters, 39 electromagnetic flow meters, 31 chlorine meters
- Installation of 140 valves (size between DN1400 to DN100) and 76 electrical actuators
- Construction of a SCADA Control Centre Building, valve control, flow and chlorine measurement chambers
- IP-based UHF communication system for the entire network with 3 repeater station covering an area of 56 km.