Challenge / Goal
The development of so-called "microgrids", i.e. smaller and independent grid structures as opposed to supra-regional distribution grids, is based on the idea to generate energy in a decentralised manner. The microgrid structure intends to increase the degree of self-sufficiency, i.e. the ability to supply energy independently, where possible. In the case of surplus energy in the individual microgrids, they are virtually connected to the district grid to balance the load. Precisely this digital interconnection is where the challenges lie. The mere merging of different producers, consumers, and storage units within a microgrid is neither sufficiently standardised nor adequately tested from a technical point of view. The network structure that is being built at the Baumwollspinnerei is intended to provide a transferable roadmap to promote the decentralisation of energy production in older building structures.
For the required connectivity between individual producers and consumers with each other and the public grid interface, sensors are to be installed on-site. The digital communication protocol used is the innovative LoRaWAN wireless radio system. It is highly effective for the digital coverage of large building estates due to the long-range and low energy consumption of individual transmitters and receivers. This sensor technology is coupled with cenero.one, the company's energy management system, and a load management system, using a central software platform. Using a combination of software and hardware, specifically calculated together with Stadtwerke Leipzig, the microgrid is coupled to the upstream district grid.
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