HEDNO SA as (NII)
Regulatory Framework governing the responsibilities of HEDNO SA as Non-Interconnected Islands Operator (NII)
Non-Interconnected Islands (NIIs) are the islands of Greece whose Electricity Distribution Network is not connected to the Transmission System or the Distribution Network of the Mainland.
The management of the Electricity Systems of the Non-Interconnected Islands, which includes the management of the production, market operation and the systems of these islands, is the responsibility of HEDNO S.A. and is carried out in accordance with the “Non-Interconnected Islands Electrical System Management Code”, provided for in Article 130 of Law 4001/2011, as in force.
For the implementation of the NII Electrical Systems Management Code, RAE approved with Decision 389/2015 the “Infrastructure Implementation Action Plan in accordance with Decision 2014/536/ΕΚ/14.08.2014 of the European Commission”.
The regulatory framework is also governed by other texts issued by the Regulatory Authority for Energy concerning the average variable cost of conventional production units in the NIIs, Utilities in the NIIs, Prices of hybrid power stations in the NIIs, etc
Useful documents
Operation Code for NII – 4th version - March 2022
Operation Code for NII - 3rd version - July 2020
Operation Code for NII - 2nd version - April 2018
Electrical System Operation Code for Non-Interconnected Islands (NII Code) (GG B' 304/11.02.2014 - RΑΕ 39/28.01.2014)
Amendment of the provisions of par. 1.a, Article 4 of the Contract for Load Representative Participation in the NII Market, as set out in Article 15, Chapter 5, Annex A to the NII Code and amendment of par. 2, Article 155 (GG Β’ 1076/10.03.2022 - RAE 165/17.02.2022
Addition of Annex C-CRETE SIS regarding the provisions governing the operation of the electricity market of the Small Interconnected System (SIS) of Crete during the period from the Designated Day of completion of Phase A of the electric interconnection of the island to the Designated Day of completion of Phase B of the electric interconnection (GG Β’ 4982/27.10.2021 - RAE 775/14.10.2021)
Amendment of the NII Code on the management of the Utility Services Special Account and other amendments (ΦΕΚ Β’ 4975/27.10.2021 - RAE 749/30.09.2021)
Addition of Appendix B with the establishment of a special framework for the operation - management principles of the Hybrid Power Stations and Electricity Systems of Agios Efstratios (GG Β’ 2004/25.5.2020 - RΑΕ 429/4.3.2020)
Amendment of articles 152 and 155 of the Non-Interconnected Islands Electrical System Management Code for the management of emergencies (GG B΄ 1148/29.03.2018 - RΑΕ 215/07.03.2018)
Amendment of the Electrical System Operation Code for Non-Interconnected Islands (GG Β΄ 304/11.02.2014), as in force, and RAE Decision No. 47/2016 (Β΄ 1167/2016) (GG Β' 3286/13.10.2016 - RAE 238/15.07.2016 - Unit Α)
Amendment of article 237, Electrical System Operation Code for Non-Interconnected Islands (GG Β' 2221 /15.10.2015 - RAE 330/17.09.2015)
Infrastructure Implementation Action Plan in accordance with Decision 2014/536/ΕΚ/14.08.2014 of the European Commission