New energy storage systems are necessary to shape the energy transition in Germany. Aschaffenburg UAS also supports the development and testing of such new energy storage systems with its expertise.
Modular Multilevel Converters (MMC) have advantages over other converter topologies (e.g., low grid feedback, filterless operation, avoidance of resonances and non-critical failure behaviour) and diverse options for coupling energy storage, generators and consumers. MMC technology can help to increase the quality and stability of the grid by providing active and reactive power, compensation of harmonics, phase balancing, provision of short-circuit power or islanding capability.
The LeMoreStore project aims to utilise the advantages and properties of MMC technology in order to apply it to the integration of energy storage systems into the electronic grid. A demonstrator based on a Modular Multilevel Converter will be developed. Aschaffenburg UAS is participating in the overall project with the sub-project “Configuration, development and construction of the converter cells of a modular energy system”.
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Methods
First, the requirements for the future areas of application of the combined converter-storage system are classifies and the safety-relevant regulations are worked out. This is followed by the selection and modelling of the battery cells. The generated energy and power cells are then tested and qualifies for operation in the demonstrator battery modules. Subsequently, the battery modules are selected and evaluated.
For an efficient evaluation, research is being conducted on a new type of evaluation procedure that makes it possible to compare different systems with each other. Here the battery modules are characterised.
The following stage involves selecting a circuit variant compatible with the demonstrator. Then followed by the configuration and development of the inverter cells. These are then tested until they are ready for use in the demonstrator. Finally, the demonstrator of the integrated storage converter system is built. Here developed battery modules and inverter cells are used. The demonstrator will be operated at the KIT North Campus and the functionality of the novel MMC-based converter-storage system will be validated and verified.
The aim of the project is to develop electronic power converter cells for the demonstrator of the grid-integrated modular energy system. A connection to the power electronics and for the heat dissipation of the inverter cell, based on the battery cells, will be developed. Thereafter the development of the power electronic circuitry will follow, which is designed for a long service life. The inverter cells developed in the project will be equipped with battery storage units and built into a demonstrator at KIT.
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Photovoltaic modules and battery storage in the Energy Lab 2.0 at KIT Campus North (Photo: Walter Frasch/KIT)
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Graphic: Lars Leister / KIT
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Project Manager
Prof. Dr.-Ing. Johannes Teigelkötter
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Würzburger Straße 45
Room C1/24/105
63743 Aschaffenburg - johannes.teigelkoetter@th-ab.de
- + 49 60 21 4206 - 809
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Würzburger Straße 45
