Cascade process of C/sells demonstrated successfully

25.10.2020

59 partners cooperate in the southern German smart grid project C/sells, including research institutions, distribution system operators (DSOs), municipal utilities, generators, service providers and consultants in the energy and IT sector – and the two TSCNET shareholders TransnetBW, the south-west German transmission system operator (TSO), and TenneT, the Dutch-German TSO. The aim of C/sells is to make the energy infrastructure renewable, decentralised, flexible, and participatory. The focus here is on the intelligent networking of generation and consumption and the use of innovative grid technologies and operating concepts. The “cell” is the basic unit of C/sells. It can be of a geographical nature, such as a city or district, or it can be a single object, such as an airport or even a single property. These “cells” assume a variety of functions and tasks that serve to stabilise the grid and provide flexibility. C/sells is funded by the German Federal Ministry for Economic Affairs and Energy in the framework of the innovation programme “Smart Energy Showcases” (“Schaufenster intelligente Energie” – SINTEG).

TransnetBW now reports a significant progress for C/sells, because together with the municipal utility of Schwäbisch Hall in the in the German state of Baden-Württemberg and the DSO Netze BW, the partially automated cascade process of C/sells was demonstrated live. A cascade process is usually understood as any process that takes place in a series of steps, and in this case, it is the step-by-step control of plants from downstream networks to remedy critical grid situations in an emergency. In the demonstration of 21 October, a simulated threat to system balancing was resolved by means of the partially automated cascade process and an intelligent measurement system. In the process, facilities were controlled right down to the lowest voltage level. The selected scenario was a realistic situation and required the cooperation of all grid operators.

The demonstration was based on the coordinated power grid cascade developed in C/sells which defines clear rules and processes for the respective grid operators. By means of control centre coupling, information on the state of the grid is continuously exchanged across all voltage levels. Several defined signal phases visualise the grid status in the control centres involved and indicate the measures to be derived from it. Thanks to the communication technology coupling of TransnetBW and Netze BW and the bidirectional exchange of information in real time, emergency situations can now be mastered jointly across voltage levels within just a few minutes. Dr. Rainer Enzenhöfer of TransnetBW and sub-project manager of C/sells comments on the successful demonstration: “With the partial automation of the cascade, it is possible, together with DSOs, to control a large number of decentralised plants in a simple and uncomplicated manner within a very short time in order to eliminate a critical grid situation.”

TransnetBW and its partners successfully demonstrated the cascade process of the C/sells smart grid project (picture: C/sells)

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> See TransnetBW press release, in German (html)
> Visit C/sells 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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Successful trial run for Equigy

09.09.2020

Fluctuations in the transmission grid are an emerging concern for European transmission system operators (TSOs) as volatile renewable generation gains in importance with the energy transition and more and more large scale power plants that stabilise the grid are being decommissioned – resulting in a considerable loss of reactive power. TSOs need to take remedial action involving intelligent technologies and supported by small, decentralised energy sources to keep production and consumption in balance. One such solution for the provision of primary control energy is the crowd balancing platform Equigy launched by the Swiss TSCNET shareholder Swissgrid in cooperation with further TSCNET shareholder TenneT, the Dutch-German TSO, and the Italian TSO Terna.

Kick-off for Equigy was in April 2020 and the objective is a new European standard allowing the participating – and possibly more – TSOs to collaborate for promotion and improvement of the renewable energy market. The innovative platform is based on blockchain technology and the Internet of Things to enable the integration of small, decentralised units such as home battery storage systems, photovoltaic systems, small-scale hydropower systems, heat pumps or even electric cars into the balancing energy market. The pilot project now has reached its first milestone: Together with Alpiq, a Swiss energy services provider and electricity producer, Swissgrid has successfully tested the process of calling up primary control power through the balancing platform. The test employed a 1.2MW battery as a flexible energy resource. Alpiq has assumed the role of commercial aggregator, linking the technical aggregator, which controls the controllable resources, with Swissgrid.

In particular, the call-up of primary control energy included the registration of flexible resources, submission of offers and awarding of bids, as well as real-time monitoring of data exchange between Alpiq and Swissgrid. The test has proven that a blockchain can support the process of providing primary control power and that aggregators or storage owners with backend systems can integrate the blockchain interfaces. The Equigy trial run has clearly indicated the potential of blockchain solutions for the future support of business processes in the field of primary control energy – this is a fundamental finding and a significant step forward. The next steps concern the evaluation of possible business models among the participating partners.

The blockchain-based crowd balancing platform Equigy by Swissgrid, TenneT, and Terna passed trial run

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> See Swissgrid news release (html)
> Visit Equigy website (html)

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First successful device installation within FARCROSS

28.08.2020

The FARCROSS (FAcilitating Regional CROSS-border Electricity Transmission through Innovation) project, which started in October 2019, is a four-year project funded by the European Commission under the Horizon 2020 programme. The objective of FARCROSS is to find solutions for increased regional cross-border cooperation in electricity transmission. The connection of regional key players in the energy value chain and the introduction of integrated hardware and software solutions are intended to tap additional resources for cross-border electricity flows. The FARCROSS consortium of 31 partners includes the transmission system operators (TSOs) from Albania, Bosnia and Herzegovina, Bulgaria, and Greece together with the TSCNET shareholders APG (Austria), Hops (Croatia), MAVIR (Hungary), and Transelectrica (Romania).

The three demonstration areas of FARCROSS are smart grid innovations, the development of regional system operations platforms to allow improved system operation forecasting on TSO level, and the optimisation of capacity allocation for regional cross-border trading. The technical grid solutions involve special line monitoring sensors, which are based on the Dynamic Line Rating (DLR) technology for real time overhead line monitoring. These sensors enable TSOs to optimise the utilisation of their transmission lines. The installation of DLR sensors is intended for four countries, and the Croatian TSO HOPS was the first to install such devices on the 220kV Senj-Melina transmission line a month ago. Since then, the sensors have been operating smoothly and the HOPS team of experts is pleased to have taken the first step towards the ambitious FARCROSS goals.

As part of the FARCROSS project, HOPS has installed monitoring sensors on the Senj-Melina overhead line to improve capacity utilisation (illustration using pictures by HOPS and FARCROSS H2020)

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> See HOPS press release, in Croatian (html)
> Visit FARCROSS website (html)

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Amprion: “Smart Valve” for flexible power flow control

05.08.2020

To maintain the stability of the transmission grid despite the current increase in decentralised and volatile generation, the German transmission system operator (TSO) Amprion – like many other TSCNET shareholders – is already using a wide range of innovative technologies, for instance Phase-shifting transformers (PSTs) or reactive power compensation systems such as Statcom. A promising pilot project has now additionally been launched, for which Amprion has signed a cooperation agreement with the US Silicon Valley company, Smart Wires. In the three-phase project, the mobile modular static-synchronous series compensator (mSSSC) developed by Smart Wires, the so called SmartValve, will be deployed in the Amprion grid.

The aim of the project is both to increase the transmission capacity of Amprion’s transmission grid and to maintain its high level of system stability. SmartValve is designed for a more balanced and thus more efficient use of power lines. By actively changing the power flows, it enables better control of the transmission system and minimises redispatch. Due to its modular structure, SmartValve is easy to transport and can be operated flexibly at different locations. This distinguishes the new technology from conventional PSTs, for example, making it an ideal complement to support the system from a stability perspective.

Dr. Klaus Kleinekorte, CTO at Amprion, refers in this context to the significantly increased costs for redispatch in Germany in recent years due to the changes in the energy landscape. This is where the SmartValve project comes in: “We see this innovative technology as having the potential to allow us to use the network more efficiently and reduce the need for redispatch.” The two partners expect the project to span two to three years to verify the added value of the new technology in the Amprion grid.

Amprion and Smart Wires launched a pilot project to implement the SmartValve solution in the transmission grid (picture: Smart Wires)

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> See Amprion press release (html)

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Awards for ELES smart grid projects

30.07.2020

The International Smart Grids Action Network (ISGAN) is a technology cooperation programme on smart grids by the International Energy Agency (IEA). ISGAN provides a strategic platform to raise awareness and to stimulate action by high level governments for accelerated development and deployment of smart and clean electricity grids around the world. ISGAN initiatives include the annual ISGAN Award of Excellence in “Digitalization Enabling Consumer Empowerment”. On 28 July, the jury announced the winners of the 6th ISGAN Award, which focuses on digitisation at global level and for which nominations have been received from around the world. The first and second prizes were awarded to two projects in which TSCNET shareholder ELES, the Slovenian transmission system operator (TSO), is significantly involved.

The first place goes to the NEDO project, a Japanese-Slovenian initiative whose main partners, besides ELES, are the Japanese New Energy and Industrial Technology Development Organisation (NEDO) and the multinational conglomerate Hitachi. The NEDO project introduces integrated and centrally managed cloud-based solutions to make better use of the existing network and provide customers with a higher quality electricity supply and the opportunity to actively participate in electricity markets and systemic services. ELES decided at the end of 2015 to participate in the project, whose main responsible partner, the namesake agency NEDO, received the award on behalf of the consortium.

The award for FutureFlow, which took second place, was received by ELES itself. The international project was conceived by ELES experts and involves twelve partners from eight European countries. The project implements innovative e-trading solutions for smart cross-border balancing and redispatching in the control areas of four central and southern European TSOs, which are all shareholders of TSCNET. Besides the project leader ELES, the other TSO participants are APG from Austria, MAVIR from Hungary, and Transelectrica from Romania. FutureFlow was launched in 2016 and successfully concluded in December 2019. Pilot tests in real time have proven that also small businesses and power generation units can be a reliable source of flexibility to maintain the balance in the electricity system. The project was funded by the EU under the Horizon 2020 programme, in fact, it was the largest research project financed under Horizon 2020.

The ISGAN Award 2020 is exceptional in that it is the first time that one company receives two awards. After the announcement, the CEO of ELES, Aleksander Mervar, commented that with these two awards, ELES has obtained great international recognition for its activities in the field of innovation and development of smart networks. Mr Mervar complimented the partners in both consortia. By dedicating the two awards to all those who participated in both projects, he acknowledged their outstanding performance.

ELES received two ISGAN Awards 2020 for the smart grid initiatives FutureFlow and NEDO Project (picture: ELES)

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> See ELES press release (html)
> Visit ISGAN Award 2020 website (html)

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ENTSO-E roadmap for coordinated multi-sectorial planning

17.07.2020

Smart Sector Integration is an important topic on the European energy policy agenda and is recognised as a key factor for a climate-neutral energy system. Smart Sector Integration contributes to cost-effective solutions for system needs, supports system security and resilience, and facilitates the decarbonisation of other sectors through innovative, cross-sector solutions and synergies. For this reason, infrastructure planning for the future power system requires a multi-sectoral approach that includes facilities for electricity and gas transmission as well as for transport and heat. In recognition of and to promote the European Network of Transmission System Operators for Electricity (ENTSO-E) has published a roadmap for the development of multi-sectoral planning support up to 2030.

Multi-Sectorial Planning Support (MSPS) constitutes a long-term, holistic view of system planning. It facilitates coordination and consistency between the different sectors in infrastructure planning. As basis for system and sector development plans, it allows for even more comprehensive and consolidated scenarios compared to the current joint scenarios of ENTSO-E and the European Network of Transmission System Operators for Gas (ENTSOG). In a screening process, projects which have relevant interactions with other sectors, or which compete with projects in other sectors are compared through a transparent cost-benefit analysis, taking the ENTSOs’ Ten-Year Network Development Plan (TYNDP) to a new level.

ENTSO-E has published the “Roadmap for a multi-sectorial Planning Support” (picture: ENTSO-E)

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> See ENTSO-E press release (html)
> Open Roadmap (pdf, 2.07MB)
> Open Executive summary (pdf, 362.4kB)

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Smart control of heat pumps – HeatFlex expands

08.07.2020

Launched in the summer of 2018, the HeatFlex research project aims to exploit the potential for grid stabilisation that small and decentralised consumer devices can offer – if actively involved in the stabilising process. The founding project members are TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), and the southern German distribution system operator (DSO) Bayernwerk Netz. Following the successful cooperation and positive test results, TenneT and Bayernwerk Netz are now expanding the project. The grid operators are pleased to welcome three new project partners: the DSO Regensburg Netz as well as the public utilities Stadtwerk Haßfurt and SWW Wunsiedel.

With HeatFlex, TenneT and Bayernwerk are jointly researching the most effective integration of decentralised devices – such as electric storage heaters, heat pumps, and water heaters – into grid balancing. These flexible capacities are intended to avoid cost-intensive interventions by the TSO in the case of future grid bottlenecks. Since November 2019, the project partners have already been implementing the first concrete measures based on HeatFlex results: The heat pumps and direct heating systems connected to Bayernwerk Netz are being intelligently controlled for bottleneck prevention. Decentralised heating systems are thus partially taking over the stabilising function of fossil plants. Using ripple control technology already in place, no additional investments are required.

The increase in partners should serve to make intelligent use of even more local flexibility and to investigate further controllable, decentralised consumption units and alternative applications. The ultimate aims of HeatFlex are cost savings, reduction of grid extension, and the acceleration of the energy transition without jeopardising system security. “The intelligent control of the smallest, decentralised electricity consumption units is a small but essential element,” explains TenneT Managing Director Tim Meyerjürgens, “because the many pieces of the puzzle together make up the overall picture of the energy transition”.

The research project HeatFlex is extended with three additional partners (picture: Stiebel Eltron)

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> See TenneT press release, in German (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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Redispatch harmonisation in Germany

26.06.2020

Up until now, redispatch measures between the four German transmission system operators (TSOs) – 50Hertz, Amprion, TenneT, and TransnetBW – and the operators of power plants and storage facilities with a capacity of more than 10MW have been carried out on the basis of IT tools specific to the particular TSO control area. In order to align the individual procedures nationwide, the four TSCNET shareholders on 26 June successfully put the first component of their joint redispatch platform into operation, the “Redispatch Settlement Server” (“Redispatch-Abwicklungsserver” – RAS).

The German electricity market is increasingly characterised by volatile generation and RAS is an instrument to initiate redispatch measures both faster and more flexibly. With harmonised data formats and processes, the redispatch platform, of which the RAS is the first part, provides the basis for the integration of renewable energies into the existing redispatch processes, that is, for future-proof congestion management. In concrete terms, RAS allows TSO control centres to monitor and process all relevant power plant interventions. As a result, TSOs can coordinate their redispatch decisions and activities more efficiently. Moreover, the central management introduces frictionless settlement and transparency processes.

The second part of the redispatch platform is the “Redispatch Determination Server” (“Redispatch-Ermittlungsserver” – RES). RES will complement or replace existing forecasting tools for expectable grid situations such as imminent bottlenecks. It will identify those options for action that are compliant with the regulations and most cost-efficient. Based on RES calculations, TSOs can resolve both predicted and existing grid congestions more efficiently than today. RES is scheduled to go into operation in 2021.

The four German TSOs have succesfully launched RAS, a joint server for redispatch settlement

Linkup
> See 50Hertz press release (html)
> See Amprion press release, in German (html)
> See TenneT press release, in German (html)
> See TransnetBW press release, in German (html)

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