In 2011, a new biogas power plant with the output of 750 kW was put into operation in the town of Pacov. The power plant is used to process biological waste – slurry from the breeding of livestock. During the process of anaerobic digestion, biogas – methane (CH4) – is produced. It is collected in storage tanks and then used for the simultaneous generation of electricity and heat (cogeneration). Thanks to the connection of the cogeneration unit to the high-voltage grid, the produced electricity is delivered to the power grid. The cogeneration unit's cooling system is the source of heat energy. Heat energy is then used for the heating of the biogas power plant itself and the adjacent poultry house.
The biogas power plant control and visualization systems were implemented by the South Moravian company ELTOS Hradek.
Prior to the installation of the control and visualization systems, all processes had been analyzed. Subsequently, a control system by Unitronics and the Reliance SCADA/HMI system were installed. Reliance is responsible for the visualization of the biogas power plant processes.
Five Unitronics V280 PLCs are used to control the processes. The primary PLC receives information from the four secondary PLCs and simultaneously provides operating data to Reliance. The entire system is interconnected by a computer network and its parts communicate with one another via the TCP/IP protocol.
The Reliance system is installed on the operator room's PC. For clarity's sake, the biogas power plant processes are visualized on five visualization windows that help the operating personnel to monitor or control:
To track down errors from the operation of the power plant, a report and an alarm database were created in the Reliance system. Error messages and alarms can be sent to recipients as email or text messages. The operating and managing personnel can also access the visualization project remotely via Reliance 4 Web Client.
The slurry management overview screen
Visualization of the process of biowaste pasteurization
Visualization of the heating circuit
Try the Reliance SCADA/HMI system on several example projects or download the installer of the trial version for free.
Visualization and control of the processes at the Pacov Biogas Power Plant
5 x Unitronics V280
1 x Reliance 4 Control Server with 500 data points
Reliance 4 Web Client