Ελληνική έκδοση

The Hellenic DSO

HEDNO S.A. was established and launched its operation 2012. [previously: distribution department of PPC S.A] Hellenic DSO that operates as organizationally, functionally independent regulated Company.

Main tasks: Effective Distribution Network operation, maintenance and development throughout the country and the operation of the electricity systems of the non-interconnected islands, as well as the assurance of a transparent and impartial access of all network users constitute the main tasks and the fundamental mission of HEDNO.

HEDNO delivers electricity to 7.4 million customers and in terms of number of consumers served, HEDNO is the fifth largest Distribution Company in EU.

Mesogia Area – Infrastructure

Mesogia is an area of Greek islands, including the municipalities of Koropi, Lavrio, N. Makri and the interconnected islands of Kea, Andros and Tino. HEDNO is the main DSO in Greece, responsible for the distribution network in the whole country, including the Non-Interconnected Systems in Greece (islands that are not interconnected with the main grid.)

In Mesogia, HEDNO provides energy for residential, industrial, commercial & public buildings, agriculture and streetlight.

  • 226,558 Customers at LV and MV and
  • Energy consumption: 956,604 MWh at LV and 480,107 MWh at MV.
  • 3,925 MV/LV Substations of total installed power 808,235 kVA.
  • Voltage regulators in substations

WiseGRID in Mesogia

  1. Improvement of the services provided to the customers (WiseHOME App).
  2. Development of new services, by means of the WiseGRID IOP and the WiseGRID Cockpit.
  3. Solutions to efficiently control and integrate RES/DG, cope with voltage problems and increase the hosting capacity.
  4. Intelligent automation in order to improve the power quality and efficiency.
  5. Opportunity to test new functionalities and investigate the replicability in other sections of the distribution network.
  6. Taking into account the ongoing tender for smart meters, the demonstration in the WiseGRID will allow HEDNO to gain valuable experiences.
  7. ICT tools developed in the WiseGRID are a significant step to fulfill this objective of becoming a market facilitator in the distribution network

Main goals

1. Increase of power quality and RES penetration:

The selection of a congested substation is ideal for testing new advanced application for Grid management and Demand response. The goal is to achieve the increase in RES penetration using grid management tools and demand response.

2. Active demand management for ancillary services and Market Participation

The goal is to demonstrate the role of DSO as market facilitator. Namely combining the DR capabilities and the grid management tools, HEDNO will demonstrate the provision of ancillary services (voltage support).

3. Collaboration with other energy actors:

The goal is to investigate policies that will allow the further increase in the system efficiency through a more holistic view, thus integrating other energy actors.

WiseGRID tools and technologies

In this pilot site there will be an emphasis on the following tools & technologies: WG IOP (WiseGRID InterOperable Platform, WG Cockpit, WiseHOME. Besides these, there is also a general interest in: WiseCORP, WiseCOOP, WG RESCO, WG FastV2G, WiseEVP.

NOTE: please note that as the project is developing in a dynamic way, changes are always possible.

Mesogia Area – Services and Application


  • At Attica Region, a new Regional SCADA-DMS system is in the phase of installation and commissioning, replacing the older Regional SCADA system.
  • Currently the main functionality of the system is the supervision of the HV/MV substations.
  • Supervision of the protection relays of the MV subsystems by the use of the communication protocol IEC 870-5-103.
  • The current telecommunication infrastructure is used by SCADA systems for the transfer of tele-control signals, metering data, event signals and alarm signals.
  • Current telecommunication connections between the components of the SCADA systems :
    • Connection CCS – RTUs installed into HV substations: The use of the telecommunication grid E-NET, belonging to Hellenic PPC, or using DSL connection.
    • Connection CCS - tele-control switching components on the overhead MV lines. GSM modems and the communication protocol Telegyr TG800.
    • Connection CCS – RTUs for tele-control of urban MV substations.
    • Connection CCS -Fault Passage Indicators (FPI).

In many regions, FPIs have appropriate RTUs which relay the fault signals with the se of SMS messages via an integrated GSM modem.

Expected options and services to be provided by DMS (upon complete installation):

  • alarm management
  • topology information
  • fault management,
  • power flow and local allocators,
  • outage management,
  • quality indices monitoring and
  • extraction,
  • load shed,
  • asset management,
  • short-circuit analysis
  • a virtual environment fed with real grid details as study environment for investigating distribution feeder optimization, protection coordination and operator training simulation.

2. AMR / AMI
HEDNO is responsible for installing, operating and maintaining the metering equipment necessary for the operation of the Distribution Network. HEDNO collects and validates meter data and provides the respective electricity retailers with the measured consumption data necessary for customer billing.

  • Smart Electronic Meters at all the customers on MV and limited in LV systems
  • Responsible for monitoring the transferred energy of these buses every 15 minutes
  • AMR communicates with each Smart Meter once every 24 hours using GPRS to collect metering data and meter log files
  • Most LV customers are equipped with electromechanical meters which measure active and in certain cases reactive energy consumption
  • Approximately 200,000 smart electricity meters with either GSM/GPRS/3G communications or PLC through substation concentrators communications, are expected to be supplied for a pilot rollout to commercial, industrial and residential LV customers. (Delay in the roll out)

3. Meter Data Management System (MDMS)
for validating, storing, processing and analyzing large quantities of metering data.

4. Customer Identification System (CIS)
to cover the functionalities related to customers, the collection of the basic identifying information such as contracts and requests for types of energy products and basic functionalities offering, as well as receive fault complaints from customers.

5. Outage Management System (OMS)
to detect outages within the electric distribution network, as well as outage verification and/or supply restoration.

6. Geographic Information System (GIS)
Originally designed to capture, analyze, manage and present the spatial or geographical network data. It can collaborate with other systems and technologies concerning the network functions and management operations, such as DMS-SCADA, SAP, CIS, etc.

7. Distribution Grid Components
Smart meters, DER Controller, Concentrators

Questions ?

Do you have questions about the project, tools or pilot sites? Let us know.