APG investigates Flex-Hub concept

24.01.2020

In times of increasing shares of volatile renewable energies, flexibility is an important factor for European transmission system operators (TSOs). For this reason, TSCNET shareholder APG plans to introduce a Flex-Hub, which will enable small, decentralised flexibility resources to participate in the power frequency control of the national electricity grid. Together with the Energy Web Foundation (EWF), a global non-profit foundation to promote block chain technology in the energy sector, the Austrian TSO is conducting a feasibility study for the concept being developed by APG.

This proof of concept is intended to provide a solution for the technical implementation of the Flex-Hub using the open-source software application “Energy Web Decentralised Operating System” (EW-DOS), which includes the blockchain platform of Energy Web. The final objective of the hub concept is to efficiently integrate plant qualification, plant registration, bid management and billing functions of decentralised flexibility providers so that the additional flexibility can be made available for future challenges in power grid operation.

APG is conducting a proof of concept for its Flex-Hub model (picture: APG)

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> See APG press release, in German (html)

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Study on German-Polish TSO cooperation

16.01.2020

The two transmission system operators (TSOs) and TSCNET shareholders 50Hertz from Germany and PSE from Poland jointly conducted the “German-Polish Study on cooperation between TSOs PSE and 50Hertz in long-term and mid-term perspectives”, which now has been finalised. The study was supported by the respective national Ministries responsible for energy.

As its title suggests, the study is divided into an investigation of medium-term and long-term cooperation objectives. The mid-term part aims at improving the coordination of the operational planning processes. The following issues, among others, have been identified as important: improving the quality of forecasting of power flows at the German-Polish border and the coordinated use of cross-border remedial measures such as phase-shifting transformers as well as bilateral and multilateral redispatch. To better predict cross-border flows, PSE and 50 Hertz agreed to support the development of a flow-based methodology, and as far as the remedial measures are concerned, advanced software solutions are required. However, not only the development of an IT tool is needed here, but also advanced coordination and cost sharing in a region-wide mechanism.

For the long-term study, a modelling process carried out by the National Centre for Nuclear Research in Warsaw was used, which was consulted and monitored by experts from both TSOs. Using alternative scenarios, different time frames and market simulations, the main trends in German-Polish electricity exchange as well as future challenges for regional markets and networks were identified, such as interconnector capacities, growth of energy demands or deviating energy prices.

50Hertz and PSE have conducted a joint study on German-Polish TSO cooperation (picture: Andreas Vogel / CC BY-SA 4.0)

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> See PSE press release (html)
> See 50Hertz webpage on the study, in German (html)
> Open Executive summary (pdf, 538.47kB)

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TransnetBW’s grid booster confirmed

22.12.2019

Power generation in Germany is changing rapidly in the course of the energy transition and increasingly large amounts of renewable electricity must be transmitted from the north and east to the south and west. If the generated electricity exceeds line capacities, the four German transmission system operators (TSOs) have to perform costly redispatch measures. The grid infrastructure clearly needs expansion, for which the four German transmission system operators (TSOs) have conceived the “Network Development Plan (NDP) 2030”, the 2019 version of which was published this spring. To minimise the need for grid extension and cut redispatch costs, the NDP includes innovations that could result from technological progress in the coming years. In addition to Power-to-X and monitoring systems, prototypes of so-called grid boosters are also considered.

TSCNET shareholder TransnetBW, the TSO from the southwest of Germany, plans a grid booster pilot at the Kupferzell substation near Schwäbisch-Hall in the German federal state of Baden-Württemberg. The concept includes a fast power source in the shape of a large battery at the end of a line section that is subject to frequent strain and overload, which applies to the Kupferzell grid node. The grid booster that is envisaged, one of three in the NDP, will have an output of 250MW. The booster battery can supply energy within a few seconds. In periods of high grid load, the booster is intended to relieve the system in case of disturbances until the bottleneck can be eliminated in a targeted manner by the system management.

The Federal Network Agency (Bundesnetzagentur), the competent authority, has now approved the booster plans of TransnetBW. With this confirmation by the agency, the project can enter the procedure for inclusion in the Federal Requirements Plan, the government list of essential projects for the sustainable energy future of Germany. TransnetBW considers the grid booster to be a great opportunity to design and operate the grid infrastructure efficiently in the long term and is investing a high multi-digit million-euro amount in this environmentally friendly storage technology.

The Federal Network Agency confirms the plans of TransnetBW for a grid booster at the Kupferzell grid node (illustration using a picture of TransnetBW)

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> See TransnetBW press release, in German (html)

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Precise prognoses with AI

11.12.2019

In the control area of the German transmission system operator (TSO) 50Hertz in northern and eastern Germany, the installed capacity of renewable energies is particularly high. Since renewable energy in Germany is typically generated at a considerable distance from the centres of consumption and thus must be transmitted over long distances, the transmission losses for 50Hertz are correspondingly high. In 2018, the TSCNET shareholder transmitted a total of 117TWh of electricity and the losses amounted to 2.5TWh which corresponds to 2%.

TSOs must compensate for these losses through costly feed-in measures. 50Hertz spent around €70m in 2018 on compensatory electricity and has a keen interest in predicting losses more accurately and purchasing electricity for compensation at lower cost on the electricity market. Therefore, 50Hertz has developed a new prognosis model based on Artificial Intelligence (AI).

The previous model was based on forecasts for the expected feed-in of wind and solar power and a comparison with similar days in the past. For the new model, 50Hertz provided a much larger database: At 70 different locations in the 50Hertz control area, data on the feed-in of renewables as well as on the amount of wind, insolation and temperature are collected every quarter of an hour. With this enormous quantity of data, the artificial neural network is to calculate a transmission loss forecast for the following day, also with an accuracy of 15 minutes. The forecasts are then compared with the actual grid losses and the algorithm is automatically adjusted. This process is repeated thousands of times and the forecasts become more and more accurate.

The neural network has been in the test phase since the end of June 2019. Since then, the data has been cleansed and a database has been built so that the AI algorithm has been continuously improved and highly reliable prognoses can now be created. Since 9 December, the model is fully applied and used operationally at 50Hertz.

50Hertz has developed an AI based forecast model for grid losses (picture: 50Hertz)

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> See 50Hertz press release (html)

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Final MIGRATE conference

10.12.2019

The MIGRATE project (“Massive InteGRATion of power Electronic devices”) is the largest TSO project funded by the European Commission. It was launched in 2016 in the framework of the Horizon 2020 programme. Among the 23 partners of the consortium from 13 European countries are twelve universities/labs, one manufacturer and ten transmission system operators (TSOs), including the TSCNET shareholders Amprion (Germany), ELES (Slovenia) and the Dutch-German TSO TenneT. Under the coordination of TenneT, the partners have researched technology-based solutions for an optimised linking of electricity generation and consumption by means of power electronics.

After four years of intensive work, the MIGRATE project will be successfully concluded by the end of 2019, implying that all project partners have developed innovative solutions in their respective areas of responsibility to gradually adapt the pan-European high-voltage AC transmission system to the requirements resulting from the increasing share of renewable energies and power electronic devices. At a final conference on 4 December in Brussels, the individual outcomes were presented to colleagues and anyone wishing to learn more about the power system stabilisation and grid monitoring capabilities. The keynote speech was given by Laurent Schmitt, Secretary General of the European Network of Transmission System Operators for Electricity (ENTSO-E).

The final conference of the MIGRATE project was held in Brussels on 4 December (picture of the ELES delegation with presenter Dr. Blaž Kirn (third from right): ELES)

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

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PROMOTioN for a North Sea transmission grid

08.11.2019

“PROgress on Meshed HVDC Offshore Transmission Networks” is a very precise project description but also a bit lengthy. In contrast, the dynamic acronym “PROMOTioN” refers quite well to the ambitions that the consortium members contribute to the research project. General goal of PROMOTioN is the further development of innovative technologies relevant for the deployment of meshed offshore HVDC nets. The more specific objective is to improve cooperation between grid operators and major suppliers of technical architecture and interoperable technologies to accelerate offshore HVDC grid development. PROMOTioN is the largest energy project funded under the EU Horizon 2020 programme, with a consortium of 33 partners from 11 countries, including the two TSCNET shareholders Energinet, the Danish transmission system operator (TSO), and TenneT, the Dutch-German TSO.

A report by PROMOTioN has just been published (“Regulatory and financing principles for a meshed HVDC offshore grid”) summarising the principal findings for the design of a legal, regulatory and financial framework for cross-border HVDC offshore connections. The report provides recommendations for policy-makers and other stakeholders for overcoming regulatory and financial obstacles to the realisation of a North Sea transmission system. The key conclusion of the report and of the whole project is that the North Sea riparian states need to establish a harmonised legal and economic framework to fully exploit the potential of a meshed offshore grid in the North Sea.

A distinction is made between short-term and long-term recommendations, each of which is presented very concisely. Short term recommendations include the improvement of governance and regulation of the internal market for (offshore) electricity, optimisation of innovation financing, support for early communication of all parties involved and the formalisation of cross-border cost allocation (CBCA) as a binding contract. The latter aspect is regarded as one of the most important pillars in the economic framework. The most significant long-term recommendation is that EU member states, third countries and the EU should consider adopting a North Sea Treaty containing the objectives and principles of the offshore grid.

Tim Meyerjürgens, COO at TenneT, comments on the PROMOTioN project: “The development of a cross-border HVDC grid is one of the most promising opportunities for a sustainable energy future in Europe. TenneT is cooperating closely with other TSOs to develop the idea of a meshed and efficient offshore grid in the North Sea, which requires the creation of a common regulatory framework. PROMOTioN’s research shows the way to make this happen.”

The PROMOTioN project provides a framework for cross-border HVDC offshore connections (picture: TenneT)

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> See TenneT press release (html)
> Visit PROMOTioN website (html)
> Open PROMOTioN report (pdf, 2MB)

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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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ČEPS innovation projects

12.06.2019

As European transmission system operators (TSOs), the TSCNET shareholders must adapt to the changing energy landscape and find solutions for a successful sustainable energy future. The Czech TSO ČEPS is no exception to this rule and is actively involved in several innovation projects to respond to changes in the energy industry and to ensure the reliable operation of the Czech power system, as it was now pointed out by Karel Vinkler, director of the Innovation and R&D section of ČEPS. These projects include SecureFlex, MAFRI, Dflex, and BAART, which all are part of the national THÉTA program of the Technology Agency of the Czech Republic to support research in the energy sector.

With the SecureFlex project, ČEPS recognises power flexibility as one of the most important grid stabilisation tools of the future. SecureFlex focuses on developing analysis, calculation and optimisation tools as well as targeted studies that contribute to the secure use of power flexibility in the context of new technologies and market themes. The MAFRI project (Mid-term Adequacy Forecast – Regional Indicators) aims to identify new reliability criteria for the production-capacity-adequacy evaluation. The outcomes of the project can contribute to future decisions on infrastructure investments and restorations.

In the Dflex project, the feasibility of active participation of smaller power sources will be investigated to provide flexibility for the operation and control of the power system. Through aggregation and active decentralised control systems, these energy sources will then be used to stabilise the system. Finally, the BAART project is concerned with the gradual development of the BSAE technology (Battery System Accumulation of Energy) and its potential regarding power balancing. The main purpose of this project, in which a 4 MW battery in the Tušimice power plant is being used, is the development, adaptation and modification of BSAE power balance services and their practical verification.

“ČEPS has been active in the field of innovation, research and development for a long time. The need to innovate comes naturally from the fundamental changes of the present power industry environment,” comments Vinkler.

ČEPS is conducting several innovation projects to respond to changes in the energy industry (picture shows the Czech capital Prague, where the TSO has its headquarters)

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> See ČEPS press release (html)

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AI for decentralised grid stabilisation

06.06.2019

In a sustainable energy future, small decentralised plants such as combined heat and power (CHP) plants, heat pumps or biogas units must assume the role of stabilising the transmission system, a task which is nowadays mainly performed by large, centralised power plants. To investigate the technical feasibility of decentralised stabilisation options, TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), the distribution system operator (DSO) Bayernwerk and Consolinno Energy GmbH have now jointly carried out a successful test in the southern part of the TenneT control area, the German federal state of Bavaria.

Since there is a vital public interest in such future-oriented technological solutions, the test was funded by the German Federal Ministry for Economic Affairs and Energy in the framework of the research project “C/Sells” which is part of the innovation programme “Smart Energy Showcases. Digital Agenda for the Energy Transition” (“Schaufenster intelligente Energie. Digitale Agenda für die Energiewende” – SINTEG). During the test, at the request of TenneT, the feed-in of a CHP plant controlled by Consolinno and connected to the low and medium-voltage grid of Bayernwerk was increased in order to provide the grid with the electricity required for stabilisation in the event of a bottleneck.

What is new is that each plant autonomously determines its flexibility potential through artificial intelligence (AI). The respective potential of the individual plants can then be further aggregated by means of swarm intelligence. The plants are in normal marketing and operation mode and report free flexibility quantities to the grid operators. “In Bavaria alone there are several thousand CHP plants, heat pumps and biogas facilities, nationwide there are many thousands more. They can increase the flexibility of the energy system and thus contribute to a safe and decentralised energy system in Bavaria and Germany. David can thus become Goliath,” comments Tim Meyerjürgens, COO at TenneT. Also in several other cooperative pilot projects, the TSO is exploring the potential of decentralised flexibility.

TenneT has carried out a successful test on the deployment of small decentralised plants for grid stabilisation

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> See TenneT press release, in German (html)

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Energinet explores PtG potentials

22.05.2019

The generation of renewable energy is volatile and the storage of green electricity at times when production exceeds consumption is an ever-increasing challenge for energy market participants. Power to gas (PtG) technologies appear to be particularly effective in compensating for the weather-related volatility of the renewables. Since TSCNET shareholder Energinet is not only the Danish transmission system operator (TSO) for electricity, but also for gas, the company is ideally suited to profoundly evaluate the PtG potential. The Danish national energy goal is a 100% climate-neutral energy system by 2050, and PtG can play an important role in achieving it.

Energinet’s gas grid could be an essential tool for the transmission of solar and wind energy in Denmark’s energy system of the future, as the energy can be stored and transported in the gas pipelines with hydrogen as the energy carrier. To this end, the electricity is converted into hydrogen, which can then be mixed with natural gas. The TSO is currently testing how much hydrogen the gas grid can handle. The tests take place near the West Jutland town of Varde and are part of the “Hydrogen Injection in the Gas Grid” project, in which Energinet is cooperating with the Danish Gas Technology Centre and IRD Fuel Cells.

The gas in the pipelines near Varde is presently mixed with 12% hydrogen, the research target is 15%. At the beginning of the tests in summer 2017, it was only 2%, so the results are promising. „Using hydrogen as an energy carrier allows us to connect the electricity and gas sectors,“ explains Jesper Bruun, project manager at Energinet, and adds: „Once we are able to handle the hydrogen in the gas grid, we will have an extensive and efficient infrastructure in place for transport and storage.“

Energinet is exploring PtG technologies (picture: Energinet)

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