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Former Associations

ENTSO-E is proud to continue the long history of successful TSO coordination work by 6 predecessor associations. The different committees, working groups and, task forces have transferred their work into the current ENTSO-E structure where the well-established work will continue, and also be enhanced through ENTSO-E’s pan-European perspective.

The data and documents of the ENTSO-E predecessor associations have been integrated into the ENTSO-E website. Below we list the main resources of their websites and where to find them on the ENTSO-E Website.

Association of the Transmission System Operators of Ireland (ATSOI)

​The Association of the Transmission System Operators of Ireland was established in June 1999 for the coordinated activities between EirGrid and System Operator Norther Ireland (SONI).

On 1 July 2009 ATSOI was wound up. All operational tasks were transferred to ENTSO-E.

Baltic Transmission System Operators (BALTSO)

BALTSO was founded on March 30, 2006 and was the cooperation organization of Estonian, Latvian and Lithuanian Transmission System Operators.

Its objectives were:

  • Initiation, development and implementation of conditions necessary for reliable operation and interconnection of the electrical energy systems of Estonia, Latvia and Lithuania;
  • Maintenance of means in the area of development of the Baltic transmission system;
  • Initiation, development and implementation of conditions necessary for coordinated and safe operation of the electric energy markets of Estonia, Latvia and Lithuania;
  • Promotion and implementation of cooperation between the Organization and its Members, on one hand, and energy companies of non-Member countries, on the other hand;
  • Arrangement of public relations activities related to the Baltic energy system and electricity markets;
  • Initiation, maintenance and development of relations with other relevant organizations and institutions in the Baltic States, in Europe and in the rest of the world.

On 1 July 2009 BALTSO was wound up. All operational tasks were transferred to ENTSO-E.

Within this area you find assembled the publications that have been produced under the label of BALTSO. Please select the publication you are interested in from the navigation on the right.

Annual Report

System Studies

Executive Summary

Study Baltic Grid 2025 Executive Summary on pre-feasibility steady - state load flow study on synchronous operation of Baltic power systems with the UCTE Report.

Market based analysis of Interconnections between Nordic, Baltic and Poland areas 2025 Executive Summary on study of Baltic and Polish TSOs on synchronous operation of Baltic power systems with UCTE

Adequacy Reports

2008 - Baltic Demand Forecasts 2008-2030

European Transmission System Operators (ETSO)

Upon the emergence of the Internal Electricity Market (IEM) in the European Union, the leaders of ATSOI, UKTSOA, Nordel and UCTE recognised the need for an EU-wide harmonisation of network access and conditions for usage, especially for cross-border electricity trade .

In 1999, ETSO was created as an association with the four above-mentioned associations as founding members. However, on 29 June 2001 ETSO became an International Association with direct membership of 32 independent TSO companies from the 15 countries of the European Union plus Norway and Switzerland. Before its activities were transferred to ENTSO-E, ETSO represented 40 Transmission System Operator member companies. ETSO pursued scientific aims on a non-profit basis and had the following objectives:

  • The study and development of common principles regarding the harmonisation and establishment of rules in order to enhance network operation and maintain transmission system security;
  • Facilitate the internal European market for electricity;
  • The communication and co-operation with organizations and institutions having similar objects;
  • The investigation and solution of scientific and regulatory issues of common interest to the TSO industry.

On 1 July 2009 ETSO was wound up. All operational tasks were transferred to ENTSO-E.

Within this area you find assembled the publications that have been produced under the label of ETSO.

Inter-TSO Compensation

  • ETSO Response to EC ITC Consultation Document 19.3.2009
  • Explanatory Note to ITC 2008-2009 Agreement 14.1.2008
  • Inter-TSO Compensation among SEE TSOs 29.6.2006
  • ETSO Proposal for the 2006 CBT Mechanism 22.12.2005
  • ETSO current ITC Model & possible development 28.6.2005
  • SETSO 2005 CBT 4.2.2005
  • ETSO Proposal for 2005 CBT Mechanism 6.1.2005
  • CBT in SEE from July to December 2004 5.8.2004
  • Locational Signals in Europe 30.6.2004
  • ETSO 2004 CBT Mechanism 8.4.2004
  • CBT Operational Proposal in SEE Countries 8.4.2004
  • ETSO Principles 2004 CBT Mechanism 11.7.2003
  • Implementation 2003 CBT Mechanism 17.2.2003
  • ETSO Proposal for 2003 CBT Mechanism 14.10.2002
  • Future CBT mechanism - February 2002 26.4.2002
  • ETSO Proposal for a Temporary Cross-Border Tariff 13.9.2001
  • Statement on Transmission Service Contracts 19.6.2001
  • ETSO Comprehensive document on Cross border tariff 19.6.2001

Congestion Management

  • ETSO comments on ERGEG GGP-EBMI 17.3.2009
  • ETSO-EuroPEX Final Report 25.2.2009
  • ETSO Paper Firmness on Cross-Border Capacities 30.1.2009
  • Comments on Eurelectric Balancing Markets Position 12.1.2009
  • ETSO Comments on Coherence and Convergence Report 27.11.2008
  • ETSO comments on Compliance Monitoring Report 27.11.2008
  • Legal Survey on Transparency 2008 3.11.2008
  • Update of ETSOVista, transparency platform 2.9.2008
  • Responses to ETSO-EuroPEX Consultation 4.6.2008
  • Consultation ETSO-EuroPEX Interim Report 10.4.2008
  • ETSO-EuroPEX Interim Report 10.4.2008
  • Reference Model Cross-Border Intraday Markets 7.4.2008
  • ETSO-EuroPEX study Inter-Regional CM Methods 1.2.2008
  • ETSO Position on ERGEG ERI Transparency Report 30.1.2008
  • ETSO Position on ERGEG ERI Convergence Report 16.10.2007
  • ETSO Position on Firmness of Cross-border Trade 3.7.2007
  • Survey on cross-border access in Europe 4.6.2007
  • Legal Survey on Transparency 2007 25.5.2007
  • Regional Flow-based allocations 13.3.2007
  • Dry-run Coordinated Auctions SEE region 4-9 rounds 15.1.2007
  • Dry-run Coordinated Auctions SEE region 3 round 15.1.2007
  • Dry-run Coordinated Auctions SEE region 2 round 15.1.2007
  • Internet & Market Info: SEE TSOs Websites 29.6.2006
  • Flow-Based Coordinated Auction SEE Region 29.6.2006
  • Overview Congestion Management Methods - May 2006 15.5.2006
  • Currently applied allocation methods in SEE 9.5.2006
  • Transmission Risk Hedging Products 8.5.2006
  • Dry-run Coordinated Auctions SEE region 1 round 3.5.2006
  • Transparency on transmission optimal use 20.12.2005
  • ETSO Comments Congestion Guidelines 14.7.2005
  • ETSO Position Paper on Market Power Monitoring 6.7.2005
  • ETSO Paper on Preventive Countertrade 20.4.2005
  • A Review of the Monitoring of Market Power 8.12.2004
  • Flow-based Market Coupling, ETSO-EuroPEX proposal 13.9.2004
  • Overview Congestion Management Methods - Sept 2004 9.9.2004
  • Transfer Capacity Definitions 18.6.2004
  • Cross-Border Exchanges on meshed AC Power Systems 4.5.2004
  • Paper on Congestion Management in SEE Region 29.10.2003
  • ETSO Comments on EC Paper Congestion Management 11.7.2003
  • Co-ordinated Congestion Management Scheme 16.6.2003
  • ETSO position on Coordinated Cost + 25.2.2003
  • Transparency & Data Publication. ETSO Role 14.10.2002
  • Vision on Congestion Management 26.4.2002
  • Coordinated Transmission Auction 26.4.2002
  • Reconcilation Market Splitting/Coordinated Auction 26.4.2002
  • Co-ordinated Use Power Exchanges 26.4.2002
  • Statement on Transmission Service Contracts 19.6.2001
  • Evaluation of congestion management methods… 19.6.2001
  • Coordinated Auctioning 19.6.2001
  • Key concepts for Transmission Access Products 19.6.2001
  • Coordinated use of Power exchange for Congestion M 19.6.2001
  • Position paper on Congestion Management 19.6.2001

Security of Supply

Tariffs

Renewables

Others

ETSO comments CEER consultation 3rd package  21.01.2009
ETSO amendments to Cross-Border Regulation  25.03.2008
3rd EC Energy Package: TSOs as market facilitators  22.02.2008
ETSO Key Messages on 3rd EC Energy Package  22.02.2008
ETSO Response to EC Strategic Energy Review  19.03.2007
Procedures for building 110 kV to 400 kV lines  03.07.2006
ETSO Comments on EC Energy Sector Enquiry  03.05.2006
ETSO Comments on Regional Market  29.08.2005
ETSO Opinion on the IEM Evolution  30.06.2005
ETSO Conference on Security of Supply  24.01.2005
Co-operation with Power Exchanges  29.11.2002

NORDEL

Nordel was founded in 1963 and was a body for co-operation between the transmission system operators in Denmark, Finland, Iceland, Norway and Sweden, whose objective was to create preconditions for a further development of an effective and harmonised Nordic electricity market. Nordel was also a forum for contacts between the transmission system operators and representatives of the market participants in the same countries.

The purpose of Nordel was to issue advice and recommendations promoting an efficient electric power system in the Nordic region, taking into account the conditions prevailing in each country. Nordel contributed to international co-operation and information exchange pertaining to the electric power system and the electricity market.

On 1 July 2009 Nordel was wound up. All operational tasks were transferred to ENTSO-E.

Within this area you find assembled the publications that have been produced under the label of Nordel, one of the predecessor associations of ENTSO-E. Please select the publication you are interested in from the navigation on the right.

Planning

Prioritised cross-sections Reinforcement measures within the Nordic countries

Operations

Market

Annual Statistics

Annual Report

Union for the Coordination of the Transmission of Electricity (UCTE)

The Union for the Co-ordination of Transmission of Electricity coordinated the operation and development of the electricity transmission grid for the Continental European synchronously operated transmission grid, thus providing a reliable platform to all participants of the Internal Electricity Market and beyond.

Since 1951, the Union for the Coordination of Production and Transmission of Electricity (UCPTE) had coordinated synchronous operations through meetings of experts and managers from at first a small number of interconnected companies at the interface of Switzerland, France and Germany, and over various stages from a growing number of companies and countries. The UCPTE’s operational and planning recommendations helped ensure reliable supply of electricity in Continental Europe.

In 1999, UCTE re-defined itself as an association of TSOs in the context of the Internal Energy Market. Building on its experience with recommendations, UCTE turned to make its technical standards more binding through the Operation Handbook and the Multi-Lateral Agreement between its members. These standards became indispensable for the reliable international operation of the high voltage grids which are all working at one “heart beat”: the 50 Hz UCTE frequency related to the nominal balance between generation and the electricity demand of some 500 million people in one of the biggest electrical synchronous interconnections worldwide.

In its final year of existence, UCTE represented 29 transmission system operators of 24 countries in continental Europe.

On 1 July 2009 UCTE was wound up. All operational tasks were transferred to ENTSO-E.

Within this area you find assembled the publications that have been produced under the label of UCTE. Please select the publication you are interested in from the navigation on the right.

UCPTE/UCTE The 50 Year Success Story – Evolution of a European Interconnected Grid gives a chronological account on the development of the interconnected electricity grid of Continental Europe and provides facts and figures on the work of UCPTE and UCTE until their transition into ENTSO-E, in July 2009.

Statistics

We prepared some ready compiled statistics on certain issues in this section.

Please refer first to the important remarks in order to interprete the data correctly.

In December 2006 we had our customers, who use the online data and statistics, fill out a questionaire about how satisfied they are with the data and information we provide on the website. We compiled the results in a short presentation.

Annual Report

Annual Report 2008

Annual Report 2007

Projects

Annual Report 2006

Annual Report 2005

  • Annual Report 2005
  • Table of contents
  • The President’s foreword
  • Priorities for the new presidency
  • UCTE Security Package: OH, MLA and CMEP
  • System development
  • Statistics
  • Challenges of wind energy
  • Integration of CENTREL and UCTE reconnection
  • Inside UCTE
  • Abbrevations used

Annual Report 2004

  • Annual Report 2004
  • Table of contents
  • The President’s foreword
  • Reconnection of two UCTE zones
  • UCTE System operation in 2004
  • Developments of the UCTE synchronous area
  • Synchronous interconnection IPS/UPS with UCTE
  • System adequacy
  • Inside UCTE
  • Used abbrevations

Annual Report 2003

Annual Report 2002

Annual Report 2001

Annual Report 2000

Memo

The Memo show key figures for production, consumption and electricity exchange in the ENTSO-E Region Continental Europe (former UCTE) member countries as well as the members of former UCTE and their representatives for the respective year.

Statistical Yearbook

To access more recent Statistical Yearbooks, developed by ENTSO-E, please follow this link.

Statistical Yearbook 2008

  • Content and introduction
  • Monthly values
  • Load values
  • System information
  • Terminology

Statistical Yearbook 2007

Statistical Yearbook 2006

Statistical Yearbook 2005

Statistical Yearbook 2004

Statistical Yearbook 2003

Statistical Yearbook 2002

Statistical Yearbook 2001

Statistical Yearbook 2000

Montly Statistics

Monthly Statistics 2009

2009-06
2009-05
2009-04
2009-03
2009-02
2009-01		2009-07
2009-08
2009-09
2009-10
2009-11
2009-12

Monthly Statistics 2008

2008-06
2008-05
2008-04
2008-03
2008-02
2008-01		2008-07
2008-08
2008-09
2008-10
2008-11
2008-12

Monthly Statistics 2007

2007-06
2007-05
2007-04
2007-03
2007-02
2007-01		2007-07
2007-08
2007-09
2007-10
2007-11
2007-12

Monthly Statistics 2006

2006-06
2006-05
2006-04
2006-03
2006-02
2006-01		2006-07
2006-08
2006-09
2006-10
2006-11
2006-12

Monthly Statistics 2005

2005-06
2005-05
2005-04
2005-03
2005-02
2005-01		2005-07
2005-08
2005-09
2005-10
2005-11
2005-12

Monthly Statistics 2004

2004-06
2004-05
2004-04
2004-03
2004-02
2004-01		2004-07
2004-08
2004-09
2004-10
2004-11
2004-12

Monthly Statistics 2003

2003-06
2003-05
2003-04
2003-03
2003-02
2003-01		2003-07
2003-08
2003-09
2003-10
2003-11
2003-12

Monthly Statistics 2002

2002-06
2002-05
2002-04
2002-03
2002-02
2002-01		2002-07
2002-08
2002-09
2002-10
2002-11
2002-12

Monthly Statistics 2001

2001-06
2001-05
2001-04
2001-03
2001-02
2001-01		2001-07
2001-08
2001-09
2001-10
2001-11
2001-12

Monthly Statistics 2000

2000-06
2000-05
2000-04
2000-03
2000-02
2000-01		2000-07
2000-08
2000-09
2000-10
2000-11
2000-12

System Adequacy Reports

For a description the data and the methodology for system adequacy analysis used by UCTE in its System Adequacy Retrospect reports and System Adequacy Forecast reports please refer to  System Adequacy Methodology

System Adequacy Forecast

Publications

2008 Compliance Oversight Report 2008:

  • Compliance Oversight Report 2008
  • List of NCDs
  • TenneT Compliance Audit Report
  • Vattenfall Compliance Audit Report

Compliance Monitoring Program 2008:

2007 Compliance Oversight Report 2007:

  • Compliance Oversight Report 2007

Compliance Monitoring Program 2007:

2006 Compliance Oversight Report 2006:

UCTE compliance monitoring progr. 2006:

2005 - 2004 UCTE presentations from Florence Forum

Other Reports

2009

UCTE Transmission Development Plan

  • new Report Requirements to generating units
    Report UCTE Frequency Investigation Report
  • new Report

2008

UCTE Transmission Development Plan
Report

2007

Winter Outlook Report 2007-2008
Report UCTE data exchange format for load flow and three phase short circuit studies - Report (updated) and Description of x-nodes
Report

2006

2005

2004

2002 and earlier

European Interconnection: State of the Art 2002
Report Methodology of Power Balance 2002
Report Methodology of the Power Balance (System Adequacy)
Methodology of the Power Balance

Half Yearly Reports

Production of Half-Yearly Reports has been stopped in 2005. All relevant information can be found in Statistical Yearbooks, System Adequacy Reports and Monthly Statistics.


Newsgrid

UK Transmission System Operators Association (UKTSOA)

​The United Kingdom Transmission System Operators Association was established for coordinated activities between the TSOs of the United Kingdom in June 1999.

On 1 July 2009 UKTSOA was wound up. All operational tasks were transferred to ENTSO-E.

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