New flexibility options

Storage units are an important flexibility option in the energy system of the future: they ensure a temporal disconnection between generation and consumption, allowing them to work in support of the grid and system. In addition to battery storage in the electromobility sector, WindNODE is also studying thermal applications such as Power-to-Heat and Power-to-Cold and testing them in practice within this workstream because of their considerable storage and use potentials.

Controlled charging for battery-powered utility vehicle fleets

In Berlin, BSR and BWB are jointly researching the technical integration of the charging infrastructure of battery-powered utility vehicles in the overall system. This also includes the effects on the availability of the vehicles as well as opportunities and obstacles for the operational process. We also analyse and asses regulatory incentives for the provided battery capacities. We will then demonstrate the controlled charging, first in the city of Berlin, and later on in the project at up to ten other locations. The results of this project are captured in a scalable electromobility roadmap that can be applied to other fleet operators.

Second life applications for used vehicle batteries in the operation of an electrical fleet

In the scope of this project, BVG Systems is developing grid-compatible and system-conductive charging of electrical vehicle fleets and testing them in practice. To this end, the scenario of fully electrified public transport is studied and prepared as a flexibility option within a smart energy system. This is based on the available charging management system for the economic networking of charging infrastructure, vehicles and scheduling system. We are expanding this system with a second life storage system to enable a charging process that is both compatible with the system and will also be able to support it in the future. New business models, contributions to standardisation and proposals for the regulatory framework are derived from the practical tests.

Grid, system and market integration of electromobility in Berlin

Partners BMW, eMO (as part of Berlin Partner), Siemens and Stromnetz Berlin are working together within this exclusively self-financed project to prepare a project concept for grid and system integration of electromobility in Berlin. We are describing a complete process chain and a comprehenisve model for the system integration of electric vehicles and defining the required players and market roles. Once this conceptional phase has been concluded, the prerequisites will have been met for implementation in the follow-up project. In this follow-up project, we plan to demonstrate the usefulness of the integration of electric cars for the grid and system by means of a fleet of vehicles, and to develop business models for flexibility.

Power-to-Cool applications on an industrial scale

Ice storage technology offers excellent potentials to flexibilise electric refrigeration in industry and commerce. To this end, ILK Dresden is developing vacuum liquid ice technology for large cooling consumers, particularly in the food industry, e.g. breweries, dairy farms or refrigerated warehouses. We are also building a demonstrator with a storage and ice generation capacity of 500 MW and a connected liquid ice storage unit with a capacity of approx. 10-12 MWh – this corresponds to a volume of about 160-190 m³. Together with Radeberger, we are studying application scenarios to develop the combination of cooling generators and refrigerated thermal storage into a marketable product as an ancillary service.

Decentralised small installations – wind power storage instead of night-storage

In this project, WEMAG Netz is studying the use of regional infrastructure for night-storage heaters to support the grid. In this scope, we will test and assess to what extent night-storage heaters are suitable to provide such services in our regional distribution system in the north-east of Germany. To this end, we will complement the existing infrastructure with improved control units to enable us to integrate the heaters as decentralised controllable loads and use them in support of the grid. Thorough testing of the optimised individual units are the basis for efficiency calculations in expansion scenarios for the existing infrastructure and electricity price models for the energy system of the future.

Supply of the EUREF network with combined Power-to-Heat/Cool

In this project, GASAG Solution Plus is working together with Stromnetz Berlin to expand the existing heating and cooling system of Berlin’s EUREF research campus with a 500 kW Power-to-Heat installation and a 2000 kW Power-to-Cool installation along with hybrid storage units. This allows the local use of surplus electricity to provide heating and cooling. For the installations, we are furthermore developing new concepts for operation in support of the grid and system. Moreover, we are integrating the new installations in the existing virtual power plant to participate in the operating reserve market. In the process, we are deriving rules and algorithms to allow the results to be transferred to other application cases, particularly in the field of current building and city district supply solutions.

Large-scale system integration of Power-to-District Heating in Berlin

In the scope of the project, Vattenfall Wärme is researching whether and to what extent up to 300,000 Berlin households can be supplied with green surplus electricity from the surrounding area, depending on the season, by means of a 120 MW Power-to-District Heating system. As a preliminary step to this Power-to-Heat installation, which will be the largest in the world, we are developing control procedures on test installations in Berlin’s Mitte and Buch city districts. We are furthermore studying the marketing of flexibility options in interaction with flexible CHP electricity generation and electricity consumption installations, and studying them in practice. Our objective is to evaluate coordinated grid congestion management, taking into considerational all operational and technical framework conditions over a longer period of time.

Industrial waste heat and Power-to-Heat in district heating for load flexibilisation in the power grid

This project studies the integration of industrial waste heat with load flexibility into the municipal heating network of Stadtwerke Hennigsdorf. We are complementing industrial waste heat by means of a large-scale heat storage unit with a volume of 5,000 m³ and a Power-to-Heat installation with 10 MW as a sustainable source of climate-friendly heat from renewable surplus power. In addition, we are identifying and assessing possible flexibility options at the technical and economic level. Offers for the use of flexibility are assessed according to technical, economic and organisational criteria and interfaces are explored. Our objective is to use price signals in times of surplus production to use the electricity in our heating grid.

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