Impact of control approaches for building energy systems on distribution grid state

A growing penetration of decentralized power generation (especially photovoltaics) and additional distributed loads is expected in future energy systems in Germany. This paper investigates the impact on the electrical grid of heat-driven as opposed to electrical-driven control of energy systems in buildings. Different penetrations of the building energy systems are additionally analyzed to show their influence on the performance indicators of the electrical grid (voltages, line utilization). Different models for load/generation and the behavior of the building energy systems including the heat storages are coupled with an electrical grid simulation to perform a numerical analysis on a realistic representation of the system. The results show that a coordination of BES operation has to be considered and slight improvements of the electrical quantities can be reached by improved control. CHP plants supplemented by HR are more beneficially for the electrical grid as they can shape both loads and generation.