TSO conditions for reserve capacity approved

05.08.2019

The four German transmission system operators (TSOs), the TSCNET shareholders 50Hertz, Amprion, TransnetBW and Tennet, the Dutch-German TSO, ensure the supply of electricity under all circumstances and thus hold reserve capacities as ultima ratio for unforeseeable and exceptional extreme situations on the electricity market. The reserve capacity is calculated at 2GW and the facilities to provide the capacity are determined every two years by the TSOs through a tendering procedure.

Last week, the Bundesnetzagentur (German Federal Network Agency) approved the new standard conditions for the reserve capacity which had been drafted by the TSOs. The standard conditions are the basis of the contractual relationship between the respective TSO and the operator providing the capacity. They are designed to be as transparent as possible and include, among other things, rules on the availability and use of the reserve system, remuneration or contractual penalties.

Due to the standard conditions, the potential participants in the tender procedure know the terms under which the reserve facilities must be operated and the legal consequences in case of failure of a plant. Now that the conditions have been approved, the tender for the first performance period can start as planned on 1 September 2019.

The German Federal Network Agency approved the TSO standard conditions for reserve capacity (picture: Bundesnetzagentur)

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> See press release by the Bundesnetzagentur, in German (html)

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Regional Coordination Centre for South-East Europe

18.07.2019

The three transmission system operators (TSOs) of the South-East Europe Capacity Calculation Region (CCR) – TSCNET shareholder Transelectrica from Romania, ESO from Bulgaria and IPTO from Greece – have signed a memorandum of understanding (MoU) on establishing a Regional Coordination Centre (RCC). The memorandum emphasises the ambition of the TSOs to strengthen regional cooperation and thus contribute to the safety and efficiency of the European transmission system.

The agreement provides a cooperation framework between the three contracting parties with the common objective of finding a mutually acceptable solution for the implementation of an RCC on the principle of meeting the requirements of the Third European Energy Package and the Clean Energy for all Europeans Package as efficiently, effectively and timely as possible. The MoU sets a time frame for the core decisions. The SEE capacity calculator is to be determined as early as 4 August 2019 and the necessary documents for the founding of the RCC are to be signed by the end of the year.

The three TSOs of the South-East Europe CCR have signed a MoU on establishing an RCC (picture of the “New Europe Bridge” connecting Romania and Bulgaria across the Danube by Erich Westendarp, Pixabay).

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> See ENTSO-E press release (html)

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DA/RE project: first retrievals of redispatch capacities

11.07.2019

The Baden-Württemberg grid security initiative “DA/RE” (“DAta exchange/REdispatch”) addresses the increasing volatility and decentralisation of power generation. The aim is to stabilise the entire electricity system by utilising the flexibility potential of decentralised generation units from lower grid levels. Originally launched in the summer of 2018 by TSCNET shareholder TransnetBW, the German transmission system operator (TSO) from the state of Baden-Württemberg, and the southwest German distribution system operator (DSO) Netze BW, the project consortium was later expanded so that a total of three DSOs and four other partners from the areas of virtual power plants, home storage and energy trading were involved in the first DA/RE pilot phase from April to June 2019.

During this phase, the participants have defined and developed the method of data exchange and coordination. Following this successful implementation process, the first retrievals from pilot plants in the distribution network for redispatch purposes have now been initiated. Capacities were retrieved from battery home storage facilities, several biogas plants, a waste incineration plant and a cogeneration plant. The tests therefore involved both medium-voltage and low-voltage systems and the project partners have demonstrated that it is possible and important to make use of all flexibilities at all voltage levels for grid stabilisation.

“The retrievals from systems in the distribution network constitute a significant milestone for us, as they show that the concept is feasible and we are now able to gain initial experience in terms of practical suitability,” explains DA/RE project manager Florian Gutekunst from TransnetBW. The second stage of the pilot phase has thus begun. Further retrievals are now being carried out and various application cases are being tested. In concrete terms, the issue is how grid operators can trigger the retrieval of redispatch measures in a coordinated manner and how the information chain should be designed in order to guarantee all parties involved at all voltage levels complete transparency about the retrieval and the capacity provided. In the following third step, the retrievals are to be automated and the corresponding data paths implemented.

First retrievals of redispatch capacities have been carried out in the pilot phase of the DA/RE project (picture showing a scene from electricity trading: Next Kraftwerke)

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> See TransnetBW press release, in German (html)

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Tool for evaluating investments in storage facilities

19.06.2019

Wind and solar, the primary and volatile power sources of the energy transition, require more grid flexibility, which can be provided, for instance, by storage facilities. Energy storage technologies open opportunities for use in future energy markets and for a range of other system and grid-related purposes. For this reason, TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), is involved in many research initiatives on flexibility, e.g. to explore power-to-gas applications, electric vehicles and end-user participation in the energy system of the future.

TenneT has now introduced a new interactive assessment tool for storage investments, on which Tim Meyerjürgens, COO of TenneT, comments: “We want to support the electricity storage market. Storage facilities are an important source of flexibility for us to stabilise the grid. In the end, this can help to reduce the need for future grid extension.” Especially when it comes to questions concerning levies, charges or taxes as well as revenue opportunities, the TSO aims to assist market players and to create transparency.

This is why the tool, developed by TenneT in cooperation with Navigant Consulting, was specially designed for the economic evaluation of investments in grid-connected storage facilities. It compares technologies or types of financing and estimates maximum revenues based on an optimised use of storage units in different markets. The user can define individual key parameters or customise predefined projects to obtain a detailed breakdown of the results in terms of net present value and cash flow.

TenneT presents an interactive tool to evaluate investments in grid-connected storage facilities

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> See TenneT press release, in German (html)
> Visit site for free tool download with detailed instruction manual, in German (html)

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Connect+ for data exchange

14.06.2019

The four German transmission system operators (TSOs), the TSCNET shareholders 50Hertz, Amprion, TenneT, and TransnetBW, together with 16 distribution system operators (DSOs) have launched the “Connect+” project to jointly implement the legal requirements of the German Grid Expansion Acceleration Act (Netzausbaubeschleunigungsgesetz – NABEG). The project is a reaction to the increased need for coordination due to the current legislative amendments and intended to facilitate a more transparent exchange of data between grid operators and market participants.

German legislation has specified that, in future, all facilities for the generation or storage of electrical energy with a nominal capacity of 100kW or more must be utilised to prevent foreseeable bottlenecks in the grid. The modified conditions for redispatch apply from 1 October 2021. As the present feed-in management of the grid operators only reacts to acute congestions, an even more intensive cooperation between TSOs and DSOs is required in the future.

The new processes to be developed and introduced within the time frame pose a challenge for all grid operators. In the “Connect+” project, TSOs and DSOs want to develop uniform solutions for data distribution to harmonise data exchange between market participants and operators for congestion management. In a first step, essential specifications such as interfaces and formats are developed and defined.

The four German TSOs and 16 DSOs launch the data exchange project “Connect+” for congestion management

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> 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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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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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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Amprion presents CWE market report

03.06.2019

Amprion, one of the four German transmission system operators (TSOs), has published its market report for the period 2015 to 2018. In this comprehensive document, the TSCNET shareholder investigates the development of the electricity market in the Central Western Europe (CWE) region using data from Flow-Based Market Coupling (FBMC). The CWE countries (Austria, Belgium, France, Germany, Luxembourg, and the Netherlands) implemented FBMC in May 2015, which allows TSOs to allocate cross-border capacity and maximise market efficiency without compromising grid stability. This is due to the inclusion of the entire regional network in the coupling of electricity markets.

The control area of Amprion is a central hub for cross-border electricity trading in the CWE region. With its transmission capacities, the TSO can export up to eight GW of electricity at peak times and thus generate more than half of Germany’s total export performance. Transmission via the Amprion grid thus also supports security of supply in neighbouring countries, especially in critical situations such as winter 2016/2017.

Amprion’s analysis shows that the integration of the CWE markets is already well advanced and continues to progress. At the same time, the growing difference between positive and negative price peaks on the electricity exchanges also highlights the challenge of the highly volatile supply of renewable energies. Dr. Hans-Jürgen Brick, Chief Commercial Officer and CFO of Amprion, comments: “The mutual dependency in Europe on system security will continue to rise. We are therefore doing everything physically possible to connect the national markets and networks even better.”

Amprion has published a comprehensive market report for the CWE region

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ENTSO-E report on frequency drop

29.05.2019

On Thursday, 10 January 2019, shortly after 9 p.m., a deviation from the 50Hz mid-frequency was registered in the Continental European (CE) power system, which comprises the synchronised transmission grids of 26 countries. The deviation lasted 9 seconds and, with a drop to 49.808Hz, was the largest absolute frequency deviation since the so-called “European Blackout 2006”, when the frequency reached 49.0Hz.

Thanks to immediate collective action by the transmission system operators (TSOs) of the CE Regional Group the underfrequency was quickly rectified and the European security of supply was not compromised at any moment. In concrete terms, the activation of CE reserves and of interruptible contracts with French industrial customers returned the situation to normal. To identify the root causes of the incident, the European Network of Transmission System Operators for Electricity (ENTSO-E) undertook in-depth investigations and has now released a detailed and transparent technical analysis.

According to this report, the large drop was caused by the superposition of two factors. A significant deterministic frequency deviation (DFD) during the evening peak load encountered another, unpredicted one, registered between 9 and 11 January and caused by a technical error resulting from a frozen measurement on four connecting lines between Austria and Germany. The cumulative effect of the permanent frequency deviation from 9 to 11 January and the significant evening DFD on 10 January led to the frequency loss in the interconnected CE system.

The ENTSO-E technical report indicates that solutions for DFDs in the CE region need to be found. DFDs have been observed for years, but are now becoming more common and are of greater amplitude due to imbalances between generation and demand. Possible solutions to DFDs may require a change in operating and/or market rules. ENTSO-E will make further enquiries in close dialogue with all interested parties.

ENTSO-E has released an in-depth report on the frequency drop in the CE power system from January 2019 (illustration: ENTSO-E)

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Swissgrid analyses critical situation

27.05.2019

On the critical situation in the Swiss transmission grid on Monday, 20 May 2019, when individual grid elements were considerably overloaded or threatened to be overloaded, TSCNET shareholder Swissgrid, the Swiss transmission grid operator (TSO), has already completed an initial analysis. On that day, with a high Swiss domestic electricity production of around 12 GW, a total of around 4.5 GW was exported, most of it to Germany. Since the load flows typically run in the opposite direction, this atypical situation led to security breaches in the grid.

For reasons unknown, the European grid forecasts did not anticipate that export volumes would increase in the short term from Sunday to Monday. Swissgrid had thus to resolve the grid security breaches in real-time operation in cooperation with colleagues from the European TSOs. This incident shows that the forecasts can deviate considerably from the actual load flows. It also indicates the crucial importance of integrating all transmission grids in Europe, including Switzerland, into the grid modelling, so that any threats to grid security can be identified in advance and coordinated measures can be taken.

However, since Switzerland is excluded from market coupling due to the lack of an electricity agreement with the EU, the deviations between forecasts and effective load flows are likely to increase. An agreement, on the other hand, would include Swissgrid in the models for load flow calculation and capacity allocation of the European partners and provide the TSO with better information on the load flows through Switzerland.

Swissgrid presents first analysis of the grid security breach from 20 May (picture: Swissgrid)

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