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Michelin  Application : Remote monitoring and control of an industrial site
Cataroux represents one of the Michelin group's largest sites, with some 3,500 employees and covering a surface area of 132 acres. Considering its scale, the Cataroux site possesses its own resources for power production (thermal electric power plant and steam production network), waste water disposal (waste water plant, flow equalization basins, etc.) and heating. Due to the Cataroux site's geographical expanse and number of buildings, a tool was required to remotely monitor and control the site's utilities (heating, electricity, steam, hot water, waste water, etc.). The ISO 14000 quality certification approach has also led Michelin to implement an industrial waste monitoring and control system.
The implemented remote monitoring and control system comprises 19 Sofrel S550 remote terminal units distributed over the whole Cataroux site, 1 Sofrel S50 remote terminal unit at the Carmes site and 1 PCWin supervisory master station in the control room of the main boiler house.
I/ Waste water processing: The S550 fitted at the level of the site's waste water plant controls waste water release into the natural environment, pump operation and plant operation. The S550 installed close to the waste water catchment basins monitors the valves, pumps and physico-chemical parameters of the hydrocarbon separation plant. II/ Heating and Sanitary hot water: Each of the Cataroux site's 13 heating plants is monitored by an S550 remote terminal unit that communicates by MODBUS protocol with a FUJI Electric controller. The monitored data are acquired either directly through sensors connected to the S550's Inputs / Outputs, or via communication with the heating controllers. The S550 can also act upon the controller (force into manual mode) and on setpoint modification if temperature is too high or too low. The S550 fitted onto the heating plants also monitor the production of Sanitary Hot Water: hot water temperature and level, tank operation, etc.
III/ Process water A number of remote Input / Output boards for certain S550 remote terminal units (installed in the heating plants) are used to monitor the residual process water collection plants. They monitor the waste water levels, pump operation, pressures etc. IV/ Electrical power supply units The Cataroux plant is supplied by means of 2 EDF units that transform the electricity received to 63,000 V, to then distribute it to the site in 20,000 V and 3,000 V. The S550s installed at the level of these units monitor the position of the circuit breakers, triggering data, voltages, current intensities, powers and total energy for the control of distribution to the different workshops. V/ SOFREL PCWin remote monitoring and control supervisory master station The Sofrel PCWin Supervisory master station, installed in the control room of the main boiler house, recovers over the Ethernet network all of the data monitored by the site's different S550s. These data are recorded into the PCWin database and logs. This allows, in particular, the internal metering and billing of fluids distributed to the site's various buildings. Alarms are received automatically by PCWin which, by means of its on-call agent management module, is able to alert the maintenance staff by sending voice messages to the mobile phones of Michelin's internal network.
The follow-up of the remotely monitored and controlled equipment (number of startups, operating time, etc.) facilitates maintenance and reduces servicing operations. The site's internal customers (the different workshops) are now better served as the maintenance department has immediate access to the data that it needs to act rapidly in the event of a malfunction (e.g.: modification of a remote heating setpoint). The permanent monitoring of process collection plant operation (condensates, refrigerated water, etc.) avoids their release to the sewers and hence any associated pollution and processing costs. Finally, the monitoring of electricity supply units guarantees reactivity in the event of unit disjunction or triggering. |
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