Cross-Border Capacity Allocation on Swepol Link and Litpol Link Regional Cooperation – Mini Fora and Regional Initiatives 2003 – 2004

Total Page:16

File Type:pdf, Size:1020Kb

Cross-Border Capacity Allocation on Swepol Link and Litpol Link Regional Cooperation – Mini Fora and Regional Initiatives 2003 – 2004 Harmonised cross-border allocation rules and procedures Rafał Gawin Department of Markets Development and Consumer Issues Energy Regulatory Office, Poland ERRA Virtual Meeting, 31 January 2017 Outline EC Mini Fora and Electricity Regional Initiatives – cooperation on voluntary basis Approval of capacity allocation methods, request for ACER’s opinion – formal proceedings in CEE region Cross-border capacity allocation on SwePol Link and LitPol Link Regional cooperation – Mini Fora and Regional Initiatives 2003 – 2004 Sub-regional discussions aimed to coordinate the cross-border capacity allocation on Polish synchronous borders (DE, CZ, SK) 2005 Regional Mini Fora launched in the beginning of 2005 - initiative of the European Commission aimed to speed up the development of the regional electricity markets in Europe Central Eastern Europe (CEE) Mini Forum decided to follow existing approaches in the region (some level of coordination) and to speed up the work on fully coordinated congestion management mechanism based on real flows in the grid (flow based mechanism) 2006 - ongoing Electricity Regional Initiatives (ERIs) launched in March 2006 Continuation of work initiated by Regional Mini Fora 2015 – ongoing Cooperation within the framework established by network codes e.g. CACM GL, FCA GL („all NRAs decisions”) Electricity Regional Initiatives (ERIs) Northern Europe Baltic Region Electricity Regional Initiatives (ERIs) FLORENCE FORUM EU COMMISSION Overall forum for discussing progress in regional initiatives and pan-European consistency ERGEG (RCC) MEMBER STATES Comprises regulators from the region; Input into identifying and solving market Has autonomy, adopts its own decision making integration issues – e.g. legislative proposals, process ; chairs Stakeholders Group and Member State to Member State interface Implementation Groups IMPLEMENTATION GROUP (IG) STAKEHOLDERS GROUP (SG) (Based on mini-fora) Includes TSOs, Market Operators (where Wide participation including market players appropriate) Each SG chaired by RCC and used for consultation This is the ‘do-er’ for each Regional Initiative Chaired by RCC 5 Cross-border capacity allocation – Central Eastern Europe (CEE) 2003 Preliminary discussion among 4 TSOs: PL, DE, CZ and SK 2004 Unilateral (not coordinated) monthly auctions conducted on Polish borders with DE, CZ and SK; problem of allocating by DE and CZ higher capacities than available in Polish power system (due to inter- dependency of available capacity on different Polish borders and due to loop flows) 2005 Coordinated auctions for yearly, monthly and daily cross-border capacity allocation (between borders CZ, DE, PL) 2006 Two more TSOs – SK (SEPS) and DE (E.ON Netz) – joined Cross-border capacity allocation rules – scope of harmonisation Joint Auction Office (JAO) ONE-STOP-SHOP solution - common conditions and terms for bidding and settlement processes JAO responsible for cross-border capacity allocation TSOs responsible for calculation of available cross-border capacity and acceptance of auction results Auction Rules Methods for acceptance of bids (capacity allocation among bidders) and determination of auction price Harmonised deadlines, settlement rules, collaterals Firmness regime, compensation rules List of borders on which cross-border capacities are allocated Still regional/country specific annexes Approval of cross-border auction rules 2011 Directive 2009/72 („3rd Package”) – NRAs shall be responsible for fixing or approving … at least the methodologies used to calculate or establish the terms and conditions for access to cross-border infrastructures, including the procedures for the allocation of capacity and congestion management No explicit requirement for approval of capacity calculation methods – ongoing discussion in CEE region on how to implement Flow Based Method Level of loop flows increasing year by year 2013 (September) Implementation of 3rd Package into Polish legal framework (new competence of ERO regarding approval of capacity allocation methods) Decision to request ACER to issue opinion regarding compliance of Auction Rules (explicit auctions) used by CEE TSOs with EU regulations ERO’s Request for ACER’s opinion paper Reasons of submission of the request for opinion doubts during the national proceeding on the approval of cross-border capacity allocation methods whether CAO’s Auction Rules currently used in the CEE region are compliant with Regulation No 714/2009 (Reg.) and the annexed Guidelines (GLs) risk to approve the cross-b0rder capacity allocation methods which are not compliant with Regulation No 714/2009 (Reg.) and the annexed Guidelines (GLs) What the opinion should clarify? whether cross-border transmission capacity has to be allocated on every border between Member States in the region, and in particular on the border between Austria and Germany, in light of presented facts and legal provisions as a consequence of the above-mentioned, the compliance of the methods of allocation of cross-border transmission capacity prepared by CAO („Auction rules”) and currently used by TSOs in the CEE region with the provisions of the Guidelines annexed to Regulation No 714/2009 and with the provisions of Regulation No 714/2009 itself ACER’s opinion paper (09.2015) Main conclusions DE-AT interconnection needs to be considered as usually unable to accommodate all physical flows resulting from international trade requested by market participants i.e. as usually and structurally congested existing mitigation measures (e.g. virtual phase shifter) and currently investigated ones cannot replace transparent, non-discriminatory and market-based congestion management procedures which give efficient economic signals to market participants and the TSOs implementation of capacity allocation on DE-AT border is required pursuant to EU regulations – this border should form a constituent part of the CEE region for the application of coordinated capacity calculation, optimization of allocation and secure operation of the network current Auctions Rules approved by some NRAs from CEE region do not comply with Art. 16(1) of the Regulation 714/2009 and points 1.2, 1.4 and 3.1 of Annex I to this Regulation New legal framework – network codes (CACM GL, FCA GL) Relevant processes Capacity Calculation Regions (CCRs) – definition of geographical scope and borders on which cross-border capacity shall be calculated (decision already issued by ACER on 17.11.2016) Harmonised allocation rules (HAR) related to forward capacity allocation – subject to approval by all NRAs Interdependence of processes Explicit reference to CCRs in FCA GL (HAR on borders defined in CCRs decision) No explicit reference to CCRs for short-term capacity allocations (daily, intra-day) Capacity allocation – SwePol Link, LitPol Link SwePol Link „Old merchant line” – originally owned by entities other than TSOs Very long discussion among NRAs, TSOs, owners and capacity holders on possible implementation of market-based capacity allocation rules Implicit day-ahead auctions (market coupling) based on PCR/MRC solution implemented in December 2010 LitPol Link New interconnector originally owned by TSOs – legal obligation to implemented market-based capacity allocation rules Implicit day-ahead auctions (market coupling) based on PCR/MRC solution implemented in December 2015 Thank you for your attention ERRA Virtual Meeting, 31 January 2017.
Recommended publications
  • ENERGY March 2013, No
    ENERGY March 2013, No. 3 (15) UPDATE PUBLISHED BY THE LITHUANIAN ELECTRICITY TRANSMISSION SYSTEM OPERATOR STRATEGIC PROJECTS IN THIS ISSUE: Litgrid and ABB signed a Litgrid Junior Professionals historical agreement on the Programme – construction of the LitPol Link perfect start for a career in power power interconnection facility engineering On 15 February 2013, the strategic LitPol Link power in- page 3 terconnection project between Lithuania and Poland reached a particularly important stage with the signing of an agreement on the design and construction of a direct current insert with a 400 kilovolts (kV) back-to-back converter station in Alytus. The agreement was signed between Litgrid, the Lithuanian electricity transmission system operator, and ABB, the global technology Litgrid and ABB have signed an agreement on outsourcing the direct company. Students prepare current insert with a 400 kV converter station in Alytus see page 2 electric energy TODAY AND TOMORROW plans for the next The plans of electricity network three decades development lie in the hands of page 7 competent specialists Antanas Jankauskas, leading network development plans; he engineer of the Litgrid System has been working in the system Planning and Research Division development division of the then has been working in the energy Lietuvos Energija since 1994. sector for more than 40 years. Over the course of his career, The engineer, who specialises in Mr Jankauskas has witnessed Sector news electricity systems and networks, the creation of the electri- has spent more than half of city transmission network as well his working life, 24 years, in the as himself contributing to the page 8 Leading engineer of the Litgrid Energy Planning Institute where expansion of the network.
    [Show full text]
  • Progress of Baltic Synchronisation with Continental Europe
    Progress of Baltic synchronisation with continental Europe Hannes Kont Director of the synchronisation program Why? Facilities for the control of transmission of electricity in the Baltic States are located in Russia. Environmental impact of Capacities: 337 GW Russian electricity is unknown. Peak load: 215 GW Possibilities for electricity production and trade are limited. Synchronisation targets • By the end of 2025, we will disconnect the power systems of the Baltic States from Russia and join the Continental Europe power network and the respective frequency area. • We will mitigate the political, social and economic risks associated with the eastern neighbour. • New markets will be opened in order to improve competitiveness of business. • We will ensure energy security. Agreement on the conditions for interconnection • Signed by Elering (EE), Litgrid (LT), AST (LV), PSE (PL), select Regional Groups of Continental Europe, and main network operators on 20 May 2019 • Establishes rights and obligations regarding the synchronized connection of the Baltic power network to the Continental Europe Synchronous Area (CESA) • Main requirements: • Additional studies on dynamic stability • Transmission capacity tests • Island operation tests • Compliance with the terms and conditions, RGCE MLA Operating Handbook and SAFA What are we doing? • Existing networks are being reinforced and reconstructed, interconnection capacities increased. • To ensure frequency stability, system inertia in the Baltic power system should be provided 24/7; therefore, synchronous condensers will be constructed and the protection and control systems of the grid as well as direct current links will be upgraded. • The present direct current interconnection between Lithuania and Poland is being reconstructed into an alternating current interconnection (LitPol Link).
    [Show full text]
  • Download This Article in PDF Format
    MATEC Web of Conferences 336, 05020 (2021) https://doi.org/10.1051/matecconf/202133605020 CSCNS2020 The interconnection exchange and complex systems properties in power grid network Piotr Hadaj*, Marek Nowak1, and Dominik Strzałka1 1Faculty of Electrical and Computer Engineering, Rzeszów University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland Abstract. A case study based on the real data obtained from the Polish PSE System Operator of the highest voltages electrical energy network is shown. The data about the interconnection exchange and some complex networks (graphs) parameters were examined, after the removal of selected nodes. This allowed to test selected network parameters and to show that the breakdown of only three nodes in this network can cause significant drop of its average efficiency. 1 Introduction The concept of complex systems and related theory give many interesting applications in modelling different real systems [1]. One of examples are power systems which can be exposed on different threats even leading to the risk of potential blackouts [2]. In this short paper, the real electrical network as a graph of nodes and edges is shown. Some of this network topological parameters are given and the interconnection exchange as an example of the power system security is shown. Selected parameters of complex networks are calculated and the removal of some network nodes caused by failure was done. This leads to the changes in the whole network topology shown in tables. The most important is the drop of network efficiency and in turn, the increase of transmission costs. The paper is organized as follows: after the short Introduction in Section 2 we show the complex systems and networks theory.
    [Show full text]
  • 2018 International High Voltage Direct Current Conference in Korea October 30(Tue) - November 2(Fri) 2018, Gwangju, Korea
    http://hvdc2018.org 2018 International High Voltage Direct Current Conference in Korea October 30(Tue) - November 2(Fri) 2018, Gwangju, Korea Supported by Sponsored by 2018 International High Voltage Direct Current Conference in Korea Time table Date Plan Time Topic Speaker Co-chair/Moderator Oct.30 Welcome Party 18:00 - 20:00 Event with BIXPO 2018 Opening Ceremony 13:30 - 13:40 Chairman KOO, Ja-Yoon Opening Welcome Address Chair: Ceremony 13:40 - 13:50 Congratulation Address CESS President Dr. KIM, Byung-Geol 13:50 - 14:00 Congratulation Address KEPCO President Plenary session 1: Arman Hassanpoor 14:00 - 14:40 On Development of VSCs for HVDC Applications (ABB) Plenary session 2: Oct.31 14:40 - 15:20 Shawn SJ.Chen Introductionof China HVDC Development (NR Electric Co., Ltd) Co-chair: Plenary 15:20 - 15:30 Coffee Break Arman Hassanpoor Session Plenary session 3: Prof. KIM, Seong-Min 15:30 - 16:10 Introduction of KEPCO’s HVDC East-West Power KIM, Jong-Hwa Grid Project (KEPCO) Plenary session 4: Prof. Jose ANTONIO JARDINI 16:10-16:50 The Brazilian Interconnected Transmission System (ERUSP University) Oral Session 1: Testing experiences on extruded cable systems Giacomo Tronconi 09:10-09:40 up to 525kVdc in the first third party worldwide (CESI) laboratory Oral Session 2: An optimal Converter Transformer and Valves Yogesh Gupta (GE T&D INDIA Ltd) 09:40 - 10:10 arrangement & Challenges in Open Circuit Test for B Srikanta Achary (GE T&D INDIA Ltd) Parallel Bipole LCC HVDC System with its Mitigation 10:10 - 10:20 Coffee Break Co-chair: Conference Oral Session 3: Mats Andersson 10:20 - 10:50 Overvoltages experienced by extruded cables in Mansoor Asif Prof.
    [Show full text]
  • Part 3 Energy Policy: the Achilles Heel of the Baltic States
    THE BALTIC STATES IN THE EU: YEstERDAY, TODAY AND TOMORROW Extract from: A. Grigas, A. Kasekamp, K. Maslauskaite, L.Zorgenfreija, “The Baltic states in the EU: yesterday, today and tomorrow”, Studies & Reports No 98, Notre Europe – Jacques Delors Institute, July 2013. PART 3 ENERGY POLICY: THE ACHILLES HEEL OF THE BALTIC STATES by Dr. Agnia Grigas INTRODUCTION Nearly a decade following EU accession, the energy sector remains the most vulnerable national arena for Estonia, Latvia and Lithuania – an “Achilles heel” of the three Baltic states. The vulnerability stems from the fact that the energy sectors of the three states remain inextricably linked to and fully depended on Russia while they are virtually isolated from the rest of the EU, making them “energy islands”. This predicament is not only of concern to statesmen and strategists as energy effects almost every aspect of the Baltic states – the economy, industry and the wellbeing of citizens. The rapid inflation of the mid 2000s leading to the economic overheating and eventual economic crisis in 2008 was in part due to the rapidly accelerating costs of Russian gas and oil. Industry which accounts for a significant portion of total gas consumed (50%1 of total gas consumed in Lithuania, 21%2 in Estonia, 14%3 in Latvia) was also hard-hit. Gas prices are particularly sensitive for households who depend on gas for heating in the winter months, making up 10%4 of total gas used in Estonia in 2011, 9%5 in Latvia, and 5%6 in Lithuania, which represents 10 to 15% of their post-tax income7.
    [Show full text]
  • Energy Highlights
    G NER Y SE E CU O R T I A T Y N NATO ENERGY SECURITY C E CENTRE OF EXCELLENCE E C N T N R E E LL OF EXCE ENERGY HIGHLIGHTS ENERGY HIGHLIGHTS 1 The Synchronization of the Baltic States’: Geopolitical Implications on the Baltic Sea Region and Beyond by Justinas Juozaitis INTRODUCTION he Baltic States remain the last countries In here, one should note that both Belarus and within the Euroatlantic space whose elec- Russia have specific cards to play in achieving tricity grids continue to operate synchro- their aims. For example, Russia has a competi- nously with the Russian Integrated Power tive edge in the Baltic electricity market as the TSystem/Unified Power System (IPS/UPS). On 28 country does not follow the EU’s environmen- June 2018, after a long marathon of multilateral tal policies. Free of environmental regulations, negotiations and decades of prior discussions, Russia can apply pressure on the Baltic States Lithuania, Latvia, and Estonia had finally agreed by positioning the withdrawal from electricity to synchronize their power systems with the trade with the 3rd countries as an economically Continental European Network (CEN) through irrational decision. Russia’s experience in framing Poland. With European Union allocating €323 negative opinion towards strategic energy pro- million in January 20191 and additional €720 mil- jects in the neighbouring states is plentiful. lion in October 20202 for synchronizing Lithu- anian, Latvian and Estonian power systems, the Moreover, Russia is moving faster with its prepa- Baltic flagship energy project gains momentum. rations for the desynchronization of the Baltic States from IPS/UPS than they are doing so them- Given the joint Baltic and Polish political com- selves.
    [Show full text]
  • Project of Common Interest: Baltic Synchronisation
    Countries involved Lithuania (LT), Latvia (LV) and Estonia (EE) Project of Common Interest: Location N/A Baltic Synchronisation Project promoters Corridor: Baltic Energy Market Inteconnection Plan in electricity (BEMIP) LITGRID AB (LT) AS Augstsprigumatikls (LV) Elering AS (EE) Project website: Link Type of technology employed This generic project aims at assessing all possible options for the enhanced integration of the Baltic States’ electricity network into continental European networks. Commissioning date N/A Financial assistance Source: PLATTS, GISCO, European Commission under the Connecting NB: The project location as depicted on the map is indicative only. Europe Facility (CEF) 2014 Particular benefits of this project Feasibility study on the identification of Today the electricity network of the Baltic States is already well connected to technical requirements and costs for other EU Member States. For example, there are existing electricity integration of large interconnections between Estonia and Finland (Estlink I and II), Lithuania and scale generating unit Sweden (Nord Balt), and Lithuania and Poland (LitPol Link) - all constructed into the Baltic States' with EU support. For historical reasons, however, the Baltic States' electricity power system grid is still operated in a synchronous mode with Russian and Belarusian operating systems. synchronously with the Continental This project will allow for the synchronisation of the Baltic States' electricity Europe Network network with the Continental European Network (CEN) and thus provide for Maximum amount of greater security of supply for consumers in the Baltics, while also enabling the EU financial assistance: EUR 125,000 CEN to benefit from renewables produced in Estonia, Latvia and Lithuania. 2016 Study of Isolated What are Projects of Common Interest? Operation of Baltic power system Projects of common interest (PCIs) are key infrastructure projects, Maximum amount of especially cross-border projects, that link the energy systems of EU EU financial assistance: countries.
    [Show full text]
  • Meeting Report
    Strasbourg, 13 April 2015 T-PVS (2015) 6 [tpvs06e_2015.docx] CONVENTION ON THE CONSERVATION OF EUROPEAN WILDLIFE AND NATURAL HABITATS Standing Committee 35th meeting Strasbourg, 1-4 December 2015 __________ Meeting of the Bureau Strasbourg, 31 March 2015 MEETING REPORT Secretariat Memorandum prepared by the Directorate of Democratic Governance This document will not be distributed at the meeting. Please bring this copy. Ce document ne sera plus distribué en réunion. Prière de vous munir de cet exemplaire. T-PVS (2015) 6 - 2 - 1. ADOPTION OF THE AGENDA The Chair of the Standing Committee to the Convention, Mr Øystein Størkersen, opened the meeting on 31st March 2015. The Chair welcomed the other Bureau members and the Secretariat, and transmitted the apologies of Mr Jan Plesnik for his absence. The Chair introduced the draft agenda, prepared following the progress in the implementation of the 2015 Programme of Activities. He further suggested a couple of minor amendments to ensure a smoother running of the meeting. The draft Agenda was adopted with the amendments suggested by the Chair (see appendix 1). 2. IMPLEMENTATION OF THE 2015 PROGRAMME OF ACTIVITIES [T-PVS (2014) 5- Programme of Activities for 2015] Ms d’Alessandro welcomed the Chair and the Bureau members, and presented Ms Boryana Ravutsova who recently joined the Biodiversity Unit for a 4-month traineeship programme. Furthermore, Ms d’Alessandro presented the main activities carried out for the implementation of the Convention’s Programme of work since last Standing Committee meeting, highlighting that the number of meetings and – as a consequence – the workload for the Secretariat, has significantly increased this year.
    [Show full text]
  • Nc Hvdc Call for Stakeholder Input
    European Network of Transmission System Operators for Electricity NC HVDC CALL FOR STAKEHOLDER INPUT JOINTLY PUBLISHED WITH THE “NC HVDC – PRELIMINARY SCOPE” 7 MAY 2013 European Network of Transmission System Operators for Electricity NC HVDC – CALL FOR STAKEHOLDER INPUT TABLE OF CONTENT 1 INTRODUCTION .............................................................................................................. 3 1.1 PURPOSE .......................................................................................................................................... 3 1.2 BACKGROUND ................................................................................................................................... 3 1.3 CHALLENGES AHEAD RELEVANT TO HVDC REQUIREMENTS .................................................................. 6 1.4 GUIDING PRINCIPLES .......................................................................................................................... 8 2 GENERAL APPROACH TO NC HVDC ............................................................................................. 9 2.1 STRUCTURE ...................................................................................................................................... 9 2.2 APPLICATIONS OF HVDC AND DC CONNECTED POWER PARK MODULES ............................................... 9 2.3 CLASSIFICATION OF THE REQUIREMENTS ........................................................................................... 12 2.4 SUSTAINABILITY OF THE REQUIREMENTS OF THE NC HVDC
    [Show full text]
  • Litpol Link Construction
    Connecting Europe Facility - ENERGY LitPol Link Construction 4.5.1-0005-LT-W-M-15 Part of Project of Common Interest no 4.5.1 EXECUTIVE SUMMARY The Action "LltPol Link Construction" Is the main part of project of common Interest "LT part of Interconnection between Alytus (LT) and LT/PL border". Baltic States remain synchronously interconnected to IPS/UPS system, however before the Action implementation three Baltic countries were not properly integrated Into the wider energy networks of the rest of the European Union (the only power connection was the Estlink between Estonia and Finland) and were hence practically Isolated in the field of energy. The main objective and scope of the Action was to build Interconnection which will connect Lithuanian electricity system from Alytus substation 400 kV switchyard with Polish electricity system at Lithuania/Poland border. The Action consisted of two activities - construction of the high-voltage double-circuit power transmission line from Alytus to Llthuanla/Poland border and construction of 500 MW HVDC back-to-back converter station with 400 kV AC switchyard. The duration of the Action was ten months - from 28th April 2015 to 29th February 2016. As a result the link of 500 MW capacity connects Lithuanian and Polish power infrastructures for the first time. Completed Action allows further development of Interconnection between Lithuania and Poland - Implementation of 2nd phase of LltPo Link, comprising of construction of 2nd HVDC back-to-back converter station; that would enable Increase of capacity of Interconnection by another 500 MW to 1000 MW In total. Moreover, LitPol Link connected the grids of Baltic countries to those of Western Europe for the first time, thus ending the energy Isolation of Lithuania, Latvia and Estonia.
    [Show full text]
  • Change of Cross-Zonal Capacity Allocation Mechanism on Litpol and Swepol
    Change of cross-zonal capacity allocation mechanism on LitPol and SwePol Conditions for cross-zonal capacity calculation and allocation on LitPol and SwePol interconnectors In order to meet all security requirements of Polish power system (KSE) operation, PSE reflects the requirements regarding generation conditions in Poland in offered cross-zonal capacities. This refers to both the electricity export from Poland and import to Poland. Regarding the export, this is the case when available generation capacities are insufficient to meet power reserve requirements in the form of generation increase (upward reserve) and maximum possible cross-border exchange due to the capacity of interconnectors. In such situation, the priority is providing required power reserve level, as a precondition of security of electricity supply. It should be pointed out that this solution supports procurement of power reserve shortly before the electricity supply1, which in turn allows for not limiting generation capacities available on market due to earlier purchase of power reserves. In this way, electricity consumers have access to wider range of generation capacities within market processes in long-term, yearly, monthly and daily time horizons. Earlier procurement of power reserves would limit this scope, thereby worsening the effectiveness of commercial transactions. Also in case of the electricity import to Poland, the factors affecting its permissible values are the security conditions of the Polish power system. However, in this case is about not exceeding the minimum levels of electricity generation in given locations of the KSE in order to guarantee appropriate power reserve level in the form of generation decrease (downward reserve) and keeping quality parameters of energy supply such as voltage stability, short-circuit power, etc.
    [Show full text]
  • ENTSO-E HVDC Utilisation and Unavailability Statistics 2019 System Operations Committee
    ENTSO-E HVDC Utilisation and Unavailability Statistics 2019 System Operations Committee European Network of Transmission System Operators for Electricity ENTSO-E HVDC Utilisation and Unavailability Statistics 2019 Copyright © 2020 ENTSO-E AISBL Report rendered June 12, 2020 Executive Summary The HVDC links are important components for a stable op- maintenance outages as well as limitations. The unavail- eration of the Nordic and Baltic power system while sup- able technical capacity includes disturbance outages, limi- porting the commercial power trade in the European energy tations, unplanned and planned maintenance outages and markets. Furthermore, the HVDC links can provide other other outages. important functions like voltage and emergency power sup- port to the HVAC grid. Hence, the advantages of keeping The most significant unavailabilities in 2019 occurred for the HVDC links in operation as much as possible are indis- Baltic Cable, EstLink 2, Konti-Skan 1–2, NorNed, Skager- putable. The ENTSO-E HVDC Utilisation and Unavailabil- rak 1–4 and SwePol. Baltic Cable limitations were mainly due ity Statistics 2019 report aims to provide an overview of the to wind and solar energy feeds and EstLink 2 had 3 more se- Nordic and Baltic HVDC links as well as a detailed view of vere disturbances caused by a cooling water leakage, another each individual link. The executive summary concludes the by a faulty capacitor and faulty thyristors in the valve hall most important parts of the report into one chapter. and the last by a faulty DC voltage divider. Konti-Skan 1–2 had their HVDC conductor lines (in Denmark) and their con- trol systems replaced.
    [Show full text]