Grid System Operation


Operation of the power grid is governed by system operation codes, which aim to ensure network security across interconnected power systems and to create a harmonised system operation regime for efficient grid use across country borders.

The system operation codes are as follows:

  • Electricity Transmission System Operation Guideline (SOGL)
  • Network Code on Emergency and Restoration (NC E&R)

Principal objectives and contents

Commission Regulation (EU) 2017/1485 establishing a guideline on electricity transmission system operation (Transmission System Operation guideline, SOGL) entered into force on 14 September 2017.

The SOGL aims to establish harmonised rules on system operation for transmission system operators (TSOs), distribution system operators (DSOs) and significant grid users (SGUs) in order to provide a clear legal framework for system operation, facilitate Union-wide trade in electricity, ensure system security, ensure the availability and exchange of necessary data and information between TSOs and between TSOs and all other stakeholders, facilitate the integration of renewable energy sources, allow more efficient use of the network and increase competition for the benefit of consumers.

Ongoing consultations

No public consultations are being held at present. 

Approved requirements, terms and conditions and methodologies

Common grid model methodology pursuant to Articles 67(1) and 70(1) of the SOGL

Pursuant to Articles 67(1) and 70(1) of the SOGL, all TSOs in the European Union must jointly develop a proposal for the methodology for building the year-ahead, day-ahead and intraday common grid models from the individual grid models and for saving them.

The common grid model methodology deals primarily with the contents of the individual grid models (IGMs) used to prepare the common grid model. It also defines the scenarios prepared for the common grid model as well as the overall process of preparing IGMs and the common grid model. The common grid model methodology proposed is consistent with the common grid model methodologies prepared in connection with implementation of Commission Regulation (EU) 2015/1222 (CACM) and Commission Regulation (EU) 2016/1719 (FCA).

Proposed methodologies pursuant to Articles 67(1) and 70(1) of the SOGL

 

Proposal for key organisational requirements, roles and responsibilities in relation to data exchange

Pursuant to Article 40(6) of Commission Regulation (EU) 2017/1485 establishing a guideline on electricity transmission system operation (SOGL), all TSOs must jointly agree on a proposal for key organisational requirements, roles and responsibilities (“KORRR”) in relation to data exchange.

Approved proposal pursuant to Article 40(6) of the SOGL

 

Scope of the data exchange in accordance with Art40(5)(6)

Based on the approved KORRR, Austrian Power Grid AG (APG) and Vorarlberger Übertragungsnetz GmbH (VÜN) initially coordinated in their capacity as TSOs with the relevant distribution system operators (DSOs) and prepared a joint proposal concerning the implementation of data exchange requirements in Austria pursuant to Article 40(5) of Commission Regulation (EU) 2017/1485 establishing a guideline on electricity transmission system operation (SOGL). Pursuant to Article 6(4) of the SOGL, the two TSOs’ joint proposal must be submitted to the regulatory authority (E-Control) for approval. The proposal therefore serves only to inform market participants and is not legally binding in any way (see download link: “SOGL-Art40(5)(6)-KORRR”).

Proposal regarding the determination of LFC blocks

Article 141(2) of the SOGL stipulates that all TSOs of a synchronous area must jointly develop a common proposal regarding the determination of the LFC blocks that complies with the following requirements:

 (a) a monitoring area corresponds to or is part of only one LFC area;
 (b) an LFC area corresponds to or is part of only one LFC block;
 (c) an LFC block corresponds to or is part of only one synchronous area; and
 (d) each network element is part of only one monitoring area, only one LFC area and only one LFC block.

Approved proposal pursuant to Article 141(2) of the SOGL

 

Assumptions and methodology for a cost-benefit analysis

Approved proposal pursuant to Article 156(11)

 

Methodologies, conditions and values included in the LFC block operational agreements

Approved proposal pursuant to Article 6(3) e) (in German only)

 

 

Methodologies, conditions and values included in the synchronous area operational agreement

Approved proposal pursuant to Article 6(3) d)

 

Methodology for coordinating operational security analysis

ACER decision

 

Methodology for assessing the relevance of assets for outage coordination

ACER decision

 

Methodology for regional operational security coordination (CORE)

ACER decision

 

Methodology for regional operational security coordination (Italy North)

Approved proposal pursuant to Article 76

Principal objectives and contents

Commission Regulation (EU) 2017/1485 establishing a network code on electricity emergency and restoration (NC ER) entered into force on 18 December 2017.

The NC ER sets out harmonised requirements concerning technical and organisational measures in order to prevent the propagation or deterioration of an incident in a national system and to avoid the spread of any disturbances or blackout states to other systems. It also sets out harmonised procedures that TSOs should implement in order to restore the alert or normal state after the spread of a disturbance or blackout state.

System defence plan Austria

The system defence plan describes the measures to control critical system states, to avoid major disturbances or to limit their effects. These measures are important for the safe operation of the Austrian transmission grids in the synchronous area Continental Europe (CE), for the efficient operation and operational coordination of the Austrian transmission and distribution grids in line with demand, and for the security of supply with electrical energy in general.

System defence plan

 

Reviewing the schemes included in the system defence plan

Each TSO is responsible for reviewing the system protection schemes included in the system defence plan for its synchronous area. TSOs must therefore carry out compliance testing and periodic review of their system defence plans as specified in Article 50 of the NC ER.

Ongoing consultations

No public consultations are being held at present.

Approved requirements, terms and conditions and methodologies

Terms and conditions to act as defence service providers on a contractual basis pursuant to Article 4(2) lit. a)

Approved proposal pursuant to Article 4(2) lit a) (in German only)

 

Terms and conditions to act as restoration service providers on a contractual basis pursuant to Article 4(2) lit. b)

Approved proposal pursuant to Article 4(2) lit b) (in German only)

 

Rules for Suspension and restoration of market activities

Approved proposal pursuant to Article 4(2) lit e) (in German only)

 

Rules for Settlement in case of Suspension of market activities

Approved proposal pursuant to Article 4(2) lit f) (in German only)

 

Test plan

Approved proposal pursuant to Article 4(2) lit g) (in German only)

Grid system operation

  • SOGL

    Entered into force as from 14 September 2017

  • E&R

    Entered into force as from 18 December 2017