Integrated energy systems are gaining importance in residential houses as well as in industrial buildings. Specific components such as photovoltaic panels or heatings based on power-electricity cogeneration pave the way for a decentralized power generation and in connection with electricity and heat storage units they are increasingly developing towards intelligent control centers of local energy systems. At the Hannover fair, Next Energy – the research insitute of Northern Germany utility company EWE – is displaying solution approaches that take into account the efficient private consumption of solar power as well as technologies aiming at stabilizing the distribution networks.
A strong motivation towards the development of optimized systems lies in the steeply declining prices for electric energy generated by photovoltaics. The low price calls for solutions to more efficiently control the private energy consumption. Requirements are – besides the intelligent interplay of all electric components accessible to electronic control measures including electric vehicles – the dimensioning of these components according to the demand as well as the connection to the energy infrastructure.
Next Energy’s broad building management development approach reflects these requirements and is accompanied by interdisciplinary research activities aiming at improved PV systems, battery-electric energy storage, electric mobility and power/heat cogeneration.
In this context, realistic profiles for power consummation and generation are very important. A high optimization potential lies in analysing individual user behaviour, says research team leader Marco Zobel. The group has implemented a number of test platforms that enable users to identify the utilization by means of power and heat counter. In addition, the Oldenburg-based researchers have developed a data acquisition unit (DAQ box) which provides real-world consumption and generation data in high time resolution. Hitherto, the DIN-based resolution provided a time raster of 15 minutes, now the resolution is one second, Zobel said.
Currently a field test in a number of selected single-family homes is underway. Among others, they record current, temperatures, and phase resolved electric characteristics and thus enable the scientists to generate valuable insights into the dynamics of such integrated power generation and consumption systems. These insights in turn, said Zobel, can be fed back into the optimization of smart home controls.
Further information can be found under https://www.next-energy.de