Energy

Energy covers the production and distribution of electricity.

  • electricity production - production of electricity in classical and non-conventional power plants
  • electricity distribution - covers the transfer and supply of electricity from power plants to customers

    In Slovakia the electricity is mainly produced in thermal, hydro, and nuclear power plants. Only a small percentage is represented by other power plants. Slovakia is self-sufficient in electricity production.

    Thermal power plants use the power of steam for rotating electricity generation equipment. Steam is produced by heating water in boilers using fuel (solid, gaseous, liquid).

    Hydro power plants use motion and potential energy of water in order to transform it to electricity.
A hydro power plant forms part of a water structure. Water structure is represented by the totality of all equipment (dam, weir, intake, canal, pipeline, powerhouse) which concentrate the water flow into one place.

    Nuclear power plants are similar to thermal power plants. They are different in using steam generators instead of boilers for steam production, and heat is coming from U 235 atom breaking in a reactor (not from burning coal on grates).

    Electricity forms inseparable part of industry and automation development we see these days. Without it the industry and automation would not exist at all.

    Our company offers the design, delivery, mounting and wiring of switchboards for your energy needs. We design and produce switchboards and control systems tailor-made for you energy applications. We can design for you an energy monitoring system which monitors quarter-hour energy consumption maximum, displays measured values in a visualization on a remote PC, automatically switches pieces of equipment on/off  to control quarter-hour maximum consumption of electricity, archives data in databases and logs (daily and monthly).

 

Selected reference applications:

TOWER 115 power substation control system

    Here we programmed a TWIDO control system from Schneider Electric - through communication it controls circuit-breakers and switches, which allows then to change sources over in case of undervoltage.
    In the LV substation there are 5 circuit-breakers in 5 poles, which connect voltage from 5 transformers. Circuit-breaker no. 1 is secondary and serves as a source change-over breaker for the other 4 circuit-breakers in case of voltage failure. The source change-over can be done using 5 switch-disconnectors which make bridge from circuit-breaker no. 1. The control system monitors an occurrence of undervoltage upstream each circuit-breaker. In each pole where there is a circuit-breaker and corresponding switch-disconnector, there are switches which define whether source change-over should be carried out in case of undervoltage and whether it is possible to use circuit-breaker no. 1, i.e. it is possible to supply one line in parallel by circuit-breaker no. 1 and circuit-breakers no. 2-4.
    The control system continuously monitors the status of circuit-breakers and switch-disconnectors, and their insertion in terminals. The setting of source change-over path can be done manually as well, using push-buttons Switch circuit-breaker and switch-disconnector ON and OFF on a display. The system check the correctness of source change-over, and it prevents from switching on of a switch-disconnector if some of switch-disconnectors no. 2-4 is already switched on.

Photogallery 

Heating plant - supply pump displaying system, Bratislava

    Here we designed a control program and display system for controlling and monitoring the technology of supply pumps (115 KW). The control of EN7 and EN8 pumps is done by an AC31 control system from ABB. The display of analog and binary values is done through a 2-line TC50 panel on R-EN7 switchboard, and on a PC via SattGraph SW in the monitoring center. The control system is designed to be able to control pumps locally (used in case of maintenance or repair work), automatically (automatic control of pumps), and by operator (pump drives can be controlled manually from PC visualization or switchboard operator panel). Using the display system it is possible to view trends - time behavior of monitored values, events and alarms. In the display system (visualization), the current status of 4 pumps is displayed (temperature, ON-OFF status, pressure, operating hours ...). It is possible to display a detail view for each pump. In this view it is possible to enter and change the current values of pump revolutions or values of required pressure downstream each pump. From this view it is also possible to switch pumps on, define the control mode (automatic or operator). In the automatic mode the system controls valves, switches pumps on and off. In this mode it is not possible to control valves and pumps manually. In the operator mode the operator can freely control valves and switch pumps on/off.
    In the visualization it is also possible to display trends of each pump in the heating plant. Of course it is possible to display an alarm window.

Photogallery 

Quarter-hour energy consumption maximum control and important consumption monitoring, Vrbové

    Here we designed and implemented a control program for quarter-hour control of 2 air-conditioning motors. The control is done via variable speed drives. The whole control is ensured by a TWIDO control system. Switchboards, control system, variable speed drives, and components required for energy control and measurement were delivered and wiring by APLIK. The control system was added with a monitoring on remote PC visualization (monitoring center). The control system is designed to control quarter hour maximum of energy consumption for 2 air-conditioning motors. The control system controls the motors via variable speed drives, consumed and current energy is measured using two PM power meters. The control system provides the data read from PMs, VSDs, and the whole control process to the display system on the remote PC.
    The displaying system (visualization) is created in the ControlWeb software. In the visualization, current as well as archived data from the control process is displayed. The status of both variable speed drives and PMs is displayed in numeric form. The visualization displays the consumption of active power, cos φ, consumption of reactive power, supply of reactive power, and current quarter-hour active power in a graphical time dependent display. In this graphical display values are shown as a continuous line. It is very advantageous for the time dependent monitoring of a value. In the visualization it is also possible to view reports (daily, monthly, annual), which are automatically created during the process of control. In the visualization there is also a screen of logs and databases. Here it is possible to select logs which we want to view. Or to select a day or time interval of day we want to read from the database. Logs can be directly read from the database and printed out. The visualization is protected from an unauthorized use by a password. All functions are available only after entering a correct password.  

Photogallery 

Power substation control system, Danfoss, Zlaté Moravce

    We designed and implemented here a control application for the switching equipment of Danfoss substation. We designed and wired switchboards for the control of whole power substation. The task of the control program is to monitor and control the status of 10 circuit-breakers and switch-disconnectors in 10 independent lines, 10 power meters (PMs), and control the quarter hour consumption maximum of all substation. The control program provides all values read from quarter-hour maximum control process and from each line to a displaying system (visualization) on a remote PC.
    The displaying system (visualization) is created in Vijeo Citect 7.0 software from Schneider Electric. In the visualization each line is presented graphically. In each line there is one incoming circuit-breaker, switch-disconnector, and power meter (PM). In the visualization it is possible to view different values (actual current, voltage, power, reactive power, cos φ, energy consumption) of each PM from the given line. It is possible to view the values of PMs simultaneously and thus compare them. In the visualization a summary of line values is programmed as well (total values of switching station). From the visualization the operator can also remotely control the switch-disconnector for each line. The operator can view trends of selected values from the application in a time axis graphical display. They can also view historic data as well. The visualization and the whole system is password protected from an unauthorized use.

Photogallery