 System operation model
System operation model is based on the accepted structure “1+4” – one main control center and four secondary level network control centers.
Operation of the Croatian power system is hierarchically organized and is carried out from three levels:
- National Dispatch Center (NDC), located in Zagreb, is at the highest level,
- four network control areas are at the second level, located in Rijeka, Split and Osijek and one in Zagreb that is planned to be built soon,
the third level comprises power plants, substations and chain and basin hydro plants control centers.
NDC is the main control centre controlling the power system as a whole centre of the Croatian Control Area in UCTE. It is responsible for system operation planning and real-time system operation. NDC is authorized to coordinate the activities with system operators of neighboring control areas, coordinators of control blocks and UCTE coordination centers.
In their respective transmission areas the network centers perform the following functions:
- monitor and control the 400 and 220 kV network and 110 network of system importance in their respective transmission areas according to NDC instructions,
- independently monitor and control the 110 kV network that is not of system importance in their respective transmission areas,
- other duties relating to system operation as assigned to them by NDC.
NDC will carry out the function of a network center in the Transmission Area Zagreb until its establishment. A remote control center is a point of remote monitoring and control of several transmission plants.
Chart of System Operation Model
|