In addition to the 2 SCADA / DMS modern systems HEDNO has made available in the Islands Region and in Attica, it is now in the process of replacing the existing 8 SCADA / DMS systems with 3 new equivalent systems in its remaining 3 Regions, i.e. in the Region of Macedonia-Thrace, the Region of Central Greece and the Region of Peloponnese-Epirus.

-The 3 new SCADA Control Systems will ensure:


• Reliable operation and reduction in human resources necessary to support and maintain them.
• The lifespan and support for hardware and software (at least 15 years).
• Reduced operating costs due to maintaining newer and more modern equipment.
• Increased flexibility in communication and interconnection with both existing and future new equipment (Remote Control Load Switches, Auto Reset Switches, Fault Passage Indicators, and Small Terminal Control Units for Medium Voltage Substations).

-DMS (Distribution Management System) applications will offer a modern environment for:


• Calculating load flows
• Identifying optimal cross sections of the flow of MV network, aiming at minimizing energy losses and optimizing the supply of electricity to consumers.
• Real time Load Allocation and State Estimation.
• Predicting loads.
• Better management of voltage levels across the network.


-The combination of the new SCADA systems with DMS applications will also allow for multiple indirect benefits such as:


• Improving energy quality indicators (SAIDI, SAIFI, etc.)
• Reducing damage to equipment.
• Better use of existing staff.
• Reducing energy loss due to technical failure.
• Possibility of exchanging data with other systems, such as:

  • The GIS (Geographical Imaging) system of the Network.
  • Web applications for data presentation.
  • Call Center and IVR for real-time updating of Network Users on the time required for resuming supply after power outage or scheduled power cut.

At the same time, HEDNO is planning to establish 5 Central Regional Distribution and Control Centers (RDCC) in order to replace 57 local RDCCs currently in operation.


-The operation of Regional RDCCs and the integration of all High Voltage Substations into SCADA systems will ensure:

  • The prevention of damage to fixed assets under HEDNO’s jurisdiction by identifying in good time:
    • Serious damage to computers, such as loss of protection circuits.
    • Overloading of Power Transformers and MV Lines.
  • Safer distribution network operation with timely tracking of:
    • Voltage fluctuations on busbars.
    • High leakage from HV/MV Transformer Hub.
  • Reducing operation costs by:
    • Saving on human resources that are necessary for staffing and operating old local RDCCs.
    • Running maintenance work on a reduced number of terminal equipment.
    • Dynamic display of the state of MV Network.
    • Monitoring remotely controlled items and their effect on the Network they feed.
    • Dynamic monitoring of the MV network and real-time fault display.