All the control systems are interconnected within a redundant main network which is in turn connected to the control and monitoring station and the engineering station. Gateways are used to link the main network to secondary networks which are themselves linked to management, operating and remote control stations.
In view of the stringent and specific demands in monitoring the regulation of the gas and steam turbine-generators it is vital that specially designed, independent, autonomous systems are incorporated to provide this service. Complete transparency in the control, monitoring and setting of parameters in relation to these control systems is needed to safeguard the philosophy of distributed control, however, as the operating and monitoring stations are the means of overseeing and controlling them.
In accordance with the plant layout a series of subsystems has been created, mainly the packaged plants and the electrical system, which have their own independent control system as they operate autonomously. As a result, this main control system generates a secondary control network from which the subsystems branch off:
As with the turbine-generators, the main control and monitoring functions of these subsystems are performed from the main control centre, thereby safeguarding the philosophy of distributed control.