Control system of energy production
Combined cycle power plant which uses natural gas as fuel, contributing to environmental improvement. It has an installed capacity of 410MW.
Combined cycle technology achieves performance of up to 60% (compared to 35% of earnings coming from conventional power stations) and uses natural gas as fuel, thus significantly reducing emissions of pollutants and greenhouse gases in the atmosphere.
Description of the automation system
This installation has been automated with a S7-400 Siemens PLCs type, as in its standard configuration as well as in the high-availability in H, and S7-300 connected via ethernet to fiber optic with Siemens SCADA WinCC.
The monitoring system is based on a WinCC client architecture – server.
In the control there are installed 8 S7-400 PLCs types, three of which are redundant, and 10 of S7-300 type.
To achieve adequate control, a redundant set of servers (OS) have been installed intended to serve data to 4 clients spread throughout the plant and an engineering station (ES) to program both the SCADA as the PLC.
There are two distinct networks, a control which hang all PLCs, servers and engineering station, and a second monitoring network, which includes four clients, the engineering station and the servers. Communication between the different parts of the plant has been made with single-mode optical fiber.
Supervision includes four operating stations (WinCC clients), which are located in each of the areas of plant operation.
Initially, clients are configured so that each part can control where it is located, but giving the ability to control any part of the plant, changing only the username and password.
Control (AS) or PLC
In the control plant, as mentioned above, has a total of 18 PLCs that manage a total of 2242 digital inputs, 1220 digital outputs, 660 analog inputs and 74 analog outputs, divided between periphery centralized and decentralized.
Engineering station (ES)
There is an engineering station, from where we can program both the control and the supervision, with completely independent networks, since the engineering station has two independent ethernet cards, a system one and another for supervision.