Magazine | Issue 1 2023 The INZELL (INdustrieZELLe—industrial cell) research project examines the grid support1 and system services2 provided by an industrial cell3 with island grid capability and renewable energy. It was launched in 2020, under the leadership of Prof. Brückl OTH and Josef Bayer, Max Bögl, and runs until the end of 2023. The industrial cell, in this case, is the “Max Bögl Group” industrial plant in Sengenthal, Germany. Max Bögl Energy Cell technical data Size: › Medium-voltage power grid spanning 30 kilometers › 25 transformer stations Consumers: › Peak load: 6.3 MW (total peak load for Germany: 65–70 GW on a normal day) › Power consumption per year: 25.5 GWh (equivalent to the average energy demand of a town with approx. 30,000 residents) Generators: › Generation peak: 10.5 MW › Annual generation: 29 GWh › Wind turbines: 9.6 MW › Rooftop photovoltaic systems: 2.5 MW › 1,7-MWp floating PV park › CHP steam engine: 0.4 MW › Battery storage facility: 2.5 MW/2.25 MWh Planned: › 14-MW open-space PV system › 2 wind energy plants: 5–7 MW forschungsprojekt-industriezelle.de (available only in German) Project background Industrial plants’ increasingly costsensitive manufacturing processes require a highly reliable power supply. At the same time, however, the suppression of large-scale power plants is creating vulnerabilities when it comes to system security, particularly in the following areas: › the reactive power in the transmission network, where—despite an increase in provision—increasing deficits in the availability of reactive power have been predicted4, › the instantaneous reserve, which is no longer inherent in many generation and procurement plants, and › grid restoration, which until now, has been planned using large-scale power plants. Many industrial plants already have their own generation facilities in order to be less dependent on electricity procurement costs. Indepenadent security and a high-quality supply will also become increasingly important, as extended power outages and voltage dips in the public power grid can cause production downtime and damage, resulting in high costs. As part of the research project, investigations are being carried out that 1 Grid support: The grid is supported by the energy generation plant. 2 System services: Services that power grid operators provide in order to ensure the functionality and quality of the power supply. These are services that power grid operators provide in addition to the transmission and distribution of electricity, such as: › maintenance of power frequency stability › maintenance of voltage stability › power supply restoration › operational management/grid bottleneck management. 3 Industrial cell: An energy cell within an industrial plant. In this case, the Max Bögl Group functions as an autonomous island grid with its entire supply chain using internal renewable energy generation plants (i. e., if the external power supply is disrupted or fails in the event of an incident). 4 Source: www.iren2.de/en/goals 27
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