Construction start of Slovenian-Hungarian interconnector

16.10.2020

A glance at the guest list of the official ceremony for the start of construction of the Cirkovce-Pince overhead line reveals that a major project has been launched here. The Slovenian transmission system operator (TSO) ELES had the honour to welcome both the Slovenian Prime Minister Janez Janša and his Hungarian counterpart Viktor Orban to the opening event for the new construction. And indeed, the project is of historic proportions, as the 400kV AC line, a good 80 kilometres long, will be the first interconnector between the Slovenian and Hungarian transmission systems.

The double circuit line with 264 pylons will increase the operational reliability of the Slovenian transmission system and import transmission capacity, facilitate access to energy sources from the North and East, and allow for the integration of larger amounts of renewable energy from the whole region into the grid. The line runs from the Cirkovce substation in the northeastern Slovenian region of Lower Styria to the border settlement of Pince, which is not only on the Hungarian border, but also in the triangle of Slovenia, Croatia, and Hungary. Therefore, in addition to the substation of the Hungarian TSO MAVIR in Hévíz in Zala County, the substation of the Croatian TSO HOPS in Žerjavinec near Zagreb can also be connected to the new line, truly a European Project of Common Interest (PCI). The power line will thus even interconnect three countries. The presence of Gordan Grlić-Radman, Croatian Minister of Foreign and European Affairs, confirmed the trinational dimension of the Cirkovce-Pince line.

At the ceremony with symbolic unveiling of the construction panel, Aleksander Mervar, CEO of ELES, illustrated the supraregional significance of the power line: “This project is of great importance not only for Slovenia but also for the wider region and Europe. That is why this project was included on the list of Projects of Common Interests in 2015, while in 2019 we managed to acquire €50m funds.” Mr Mervar also explained that the project, which includes major upgrades of switchgears in Cirkovce, is the largest investment in transmission infrastructure in the history of ELES, totalling some €150m. Finally, he emphasised the good cooperation of the three TSCNET shareholders ELES, HOPS, and MAVIR: “Without this cooperation, this project would surely not be happening today.”

ELES has started construction of the Cirkovce-Pince 400kV line, which will connect the transmission grids of Slovenia, Hungary, and Croatia (picture: ELES; from right to left: Gordan Grlić-Radman, Viktor Orban, Janez Janša; second from left: Aleksander Mervar)

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> See ELES press release (html)
> Visit project website (html)

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Successful test run of SINCRO.GRID’s VVC function

07.10.2020

SINCRO.GRID is a smart grid project of the two transmission system operators (TSOs) HOPS from Croatia and ELES from Slovenia. With SINCRO.GRID, the two TSCNET shareholders are responding to the increasing lack of flexibility and reactive power in the transmission system, which in Croatia and Slovenia, as in many parts of Europe, results from the increasing integration of decentralised, volatile renewable energy sources (RES). Two distribution system operators (DSOs) from the respective countries are also involved in the European Project of Common Interest (PCI). The aim of the project partners is to optimise grid efficiency via advanced technologies and innovative data processing, including compensation devices, a dynamic thermal rating system, a battery power storage system, and a virtual cross-border control centre.

As HOPS reports, an important step has been taken towards the establishment of the binational SINCRO.GRID control centre, whose prime task is to integrate reactive power compensation devices in Croatia and Slovenia into a joint operation to fully exploit their synergy potential. The centre will thus enable voltage control and loss optimisation in transmission systems, better control and forecasting of electricity generation from RES, and the participation of RES in the provision of ancillary services.

On 30 September 2020, the SINCRO.GRID Q-U system with Volt Var Control (VVC) function was operated for the first time in fully automatic closed loop for four hours without any human intervention. All calculated VVC data were automatically sent by the Q-U system to seven transformers in three HOPS substations, optimising the transmission network in north-western Croatia. After successful testing in fully automatic mode, the test was continued in semi-automatic mode with transformers and two generators in one power station. The information and experience obtained from the test run will be used for the further analysis of the Q-U system and its application to the whole Croatian transmission system and finally for the implementation of the HOPS-ELES virtual cross-border control centre.

HOPS has carried out a successful test run of the Q-U system with VVC function within the SINCRO.GRID project (picture: HOPS)

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> See HOPS press release, in Croatian (html)
> See SINCRO.GRID news (html)

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SVC for SINCRO.GRID in Konjsko

02.07.2020

As in many parts of Europe, the increasing integration of decentralised, volatile renewable energy sources has also led in Croatia and Slovenia to a lack of flexibility and reactive power. The two TSCNET shareholders HOPS, the transmission system operator (TSO) from Croatia, and ELES, the Slovenian TSO, react to this with their joint project SINCRO.GRID that also involves two distribution system operators (DSOs) from the respective countries. The European Project of Common Interest (PCI) aims to optimise the efficiency of the two national electricity transmission networks through advanced technologies and innovative data processing methods. These include compensation devices, a dynamic thermal rating system, a battery power storage system, and a virtual cross-border control centre.

The start of construction of a static VAR compensator (SVC) in the Dalmatian substation in Konjsko on 30 June represents another significant milestone in the implementation of SINCRO.GRID. This state-of-the-art compensation system will support HOPS in actively controlling the reactive power flows in the Croatian power grid. The ceremony to mark the construction start was attended by high-ranking representatives of the Croatian government and the energy companies involved.

In addition to the SVC in Konjsko, SINCRO.GRID comprises three further main elements in Croatia: a variable shunt reactor (VSR) in the Mraclin substation near Zagreb, which was commissioned in January 2020, another VSR in the Melina substation, which is scheduled to be commissioned at the end of 2020, and finally a joint Croatian-Slovenian virtual control centre. Tomislav Plavšić, President of the HOPS Management Board, describes the latter as a unique solution for coordinated voltage regulation on the entire territory of both countries. The principal task of the binational virtual centre is to integrate three devices each in Croatia and Slovenia for reactive power compensation into one common operation to fully exploit their synergy potential.

HOPS has commenced construction of a SVC as part of the SINCRO.GRID project in Konjsko (picture with Tomislav Plavšić in the foreground: HOPS)

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> See HOPS press release, in Croatian (html)
> Visit SINCRO.GRID website (html)

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HOPS commissions variable shunt reactor

22.01.2020

A further step for the successful implementation of the Croatian-Slovenian smartgrid project SINCRO.GRID has been taken. The European Project of Common Interest (PCI) aims at optimising the efficiency of the Croatian and Slovenian electricity transmission grids through the application of advanced technologies and innovative data processing methods and is carried out by the two TSCNET shareholders ELES, the Slovenian transmission system operator (TSO), and HOPS from Croatia.

At the beginning of December 2019, the ELES substation in Divača has been equipped with a variable shunt reactor, an effective compensation tool for reactive power control. Now HOPS has put the same technically advanced system into operation at its substation in Mraclin near Zagreb. With this, HOPS has concluded the first stage of SINCRO.GRID. After the implementation of additional measures and devices, including a static VAR compensator, the Croatian TSO will be able to actively manage the reactive power flows in the Croatian power grid. This will solve problems of overloads in the long term and thus have a positive effect on grid stability and security of supply for customers.

HOPS has commissioned a variable shunt reactor as part of the SINCRO.GRID project (picture: HOPS)

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> See HOPS press release, in Croatian (html)
> Visit SINCRO.GRID website (html)

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Variable shunt reactor for SINCRO.GRID

03.12.2019

The two transmission system operators (TSOs) and TSCNET shareholders ELES from Slovenia and HOPS from Croatia are cooperating in SINCRO.GRID. This cross-border smart grid initiative is coordinated by ELES and comprises in addition to the TSOs also two distribution system operators (DSOs) from both countries. The objective of the European Project of Common Interest (PCI) is to optimise the efficiency of the respective national transmission systems by means of advanced technologies and innovative data processing methods.

Since the substantial allocation of EU funding to SINCRO.GRID under the Connecting Europe Facility (CEF) programme in 2017, the project has made significant progress. A vital component of SINCRO.GRID is optimising and installing compensation devices for reactive power control, e.g. variable shunt reactors, which are used in high-voltage transmission systems for voltage stabilisation during load variations. Now the ELES substation in Divača in south-eastern Slovenia has been equipped with such a technically advanced device manufactured by Siemens in Austria. The assembly work is in full swing and is expected to be completed by 12 December. Preparatory work for commissioning will then commence immediately.

Another major component of SINCRO.GRID is a dynamic thermal rating system for power grid operating limits. The aim is to evaluate marginal capacities of transmission system components considering weather influences and thus to improve operational safety and utilisation of overhead lines and transformers. In addition to hard- and software in control centres, atmospheric measuring devices, which are installed directly at the pylons, are also part of the system. Corresponding tests of innovative weather stations are underway. Last week, the substructure for the weather station on the Kleče-Divača overhead line was field tested.

SINCRO.GRID advances technical innovations (picture: ELES)

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> See ELES press release (html)
> Visit SINCRO.GRID website (html)

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ELES and Renault cooperate in e-mobility project

09.08.2019

“Demonstration of User-Friendly E-Vehicle Charging Solutions for Promoting Mass Use of E-Vehicles in Europe – INCIT-EV” is the somewhat lengthy but therefore very precise and apposite name of a research project conceived by TSCNET shareholder ELES together with 32 international partners. Probably the most prominent cooperation partner of the Slovenian transmission system operator (TSO) is the French multinational automobile manufacturer Renault, but the Italian automotive industry is also actively involved.

The core objective of the project, funded by the EU with around €15m under the framework of the Horizon 2020 programme, is the utilisation of advanced charging infrastructures and technologies and the development of corresponding business models. INCIT-EV is designed in line with the concept of the “E8 E-Vehicle Mass Charging Infrastructure” developed by ELES, which strives to make charging as simple, intuitive, and user-friendly as possible. The aim of the TSO is to extend the Slovenian E8 concept to the European level. The project partners also use neuroscientific techniques to adapt the development of the technology to the unconscious preferences and subjective expectations of e-car users.

ELES and Renault cooperate in e-mobility project (picture: ELES)

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> See ELES press release, in Slovenian (html)

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NEDO Project meetings in Tokyo

24.04.2019

A three-year Slovenian-Japanese smart grid project was launched in November 2016. The main partners are the Japanese New Energy and Industrial Technology Development Organisation (NEDO), its authorised contractor Hitachi, the multinational conglomerate, and TSCNET shareholder ELES, the Slovenian transmission system operator (TSO). In addition to ELES, numerous Slovenian stakeholders also contribute to the NEDO Project, the aim of which is to implement a smart grid at national level. For the power system, the benefits lie in innovative solutions that reduce the need for grid extension, as the use of advanced secondary equipment, information, communication and cloud technologies allows better utilisation of the existing grid.

Last week, two NEDO Project meetings took place in the Japanese capital Tokyo. On 17 April, Gorazd Ažman, Assistant Director of the Strategic Innovation Department at ELES, and a representative of Hitachi informed the members of the NEDO Project Steering Committee and the Advisory Board about the current project activities in the Hitachi premises. The next day, a second meeting followed, this time at the NEDO headquarters with high representatives of the Japanese Ministry of Infrastructure, the Ministry of Economic Development and Technology, ELES, NEDO and Hitachi.

ELES and Hitachi held two NEDO Project Meetings in Tokyo (collage using a picture of Eles and a picture of Hitachi Headquarters in Chiyoda, Tokyo, by Kakidai, Creative Commons, Wikimedia)

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> See ELES press release (html)

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News from PCI Energy Days

20.03.2019

The PCI Energy Days, organised by the European Commission (EC), offer promoters of European Projects of Common Interest (PCIs) the opportunity to present their projects and exchange experiences on how to build a future-proof and environmentally friendly energy infrastructure with innovative concepts. The inaugural PCI Energy Days took place on 19 and 20 March 2019 in the Belgian capital of Brussels and featured a policy conference as well as an exhibition on the practical implementation of specific PCIs. Among the attendees were the European Network of Transmission System Operators for Electricity (ENTSOE), the three transmission system operators (TSO) and TSCNET shareholders ELES from Slovenia, HOPS from Croatia and the Dutch-German company TenneT.

ELES took the opportunity to present in cooperation with HOPS the Croatian-Slovenian smart grid project SINCRO.GRID. Coordinated by ELES, SINCRO.GRID comprises in addition to the TSOs also two distribution system operators (DSOs) from both countries. The aim of the cross-border project is to optimise the efficiency of the respective national power transmission systems using advanced technologies and innovative data processing methods.

The Renewables Grid Initiative (RGI), an association of non-governmental organisations (NGOs) and TSOs from all over Europe, was also present at the PCI Energy Days to celebrate the signing of the Marine Grid Declaration. The Declaration sets out principles for grid development in the marine environment, such as promoting early mutual communication with stakeholders, adequate protection of the marine environment and knowledge sharing. The RGI members, which include the TSCNET shareholders 50Hertz, Amprion, HOPS, Swissgrid and TenneT, recognise the cooperation between TSO and NGOs as a highly promising approach to building a sustainable marine grid infrastructure. The signatories to the Declaration commit themselves to developing marine projects in accordance with nature conservation principles and early stakeholder involvement. The Marine Grid Declaration builds on the principles previously agreed in RGI’s European Grid Declaration. If you are interested, you can still sign both declarations. In this case, please contact the RGI.

From 19 to 20 March, the inaugural EC PCI Energy Days were held in Brussels, Belgium (picture: RGI)

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> See ELES press release (html)
> See RGI press release (html)
> Open Marine Grid Declaration (pdf, 926,8kB)

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ELES grid development plan officially approved

25.02.2019

Last week the Slovenian Ministry of Infrastructure agreed to the new transmission network development plan of national transmission system operator (TSO) and TSCNET shareholder ELES. The plan covers the period 2019-2028 and provides an overview of the current situation and the necessary measures to be taken in Slovenia’s electricity system to ensure sufficient transmission capacity and appropriate voltage conditions. It takes proper account of long-term forecasts for the increase in electricity consumption, the intended construction of new generation units and the expected expansion of the national as well as the pan-European transmission system.

New transmission network development plan of ELES approved by the Ministry of Infrastructure (picture: InterContinental Ljubljana)

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> See ELES press release (html)

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SINCRO.GRID contract for process technical systems

16.10.2018

The Croatian-Slovenian smartgrid project SINCRO.GRID is carried out by the two TSCNET shareholders ELES, the transmission system operator (TSO) from Slovenia, and HOPS from Croatia. The cross-border initiative aims at optimising the efficiency of the Croatian and Slovenian electricity transmission grids through the application of advanced technologies and innovative data processing methods. SINCRO.GRID has been awarded the status of Project of Common Interest (PCI) by the European Commission under the Connecting Europe Facility (CEF) programme.

On behalf of SINCRO.GID, HOPS has signed a contract with KONČAR-KET, the Croatian provider of engineering services for power generation, transmission or distribution facilities. The contract comes with the rather unwieldy title: “Process technical systems for the voltage and reactive power regulation support of the EES and dynamic monitoring of the transmission line load within the SINCRO.GRID project”, but what it’s all about is to increase the quality and capacity of the power system through the use of advanced process technical systems and algorithms. This will also promote the integration of the renewables and increase the security of customer supply.

HOPS has signed a contract for the use of process technical systems on behalf of SINCRO.GRID (picture: HOPS; on the left: Mario Gudelj, Chairman of the Board at HOPS, on the right: Goran Leci, Managing Director of KONČAR-KET)

Linkup
> See HOPS press release, in Croatian (html)
> See news release on SINCRO.GRID website (html)

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