The transformation of a city into a smart city starts in urban quarters. Information and communication technology is a key factor for the implementation of smart solutions for a higher quality of Life in urban spaces. International Standards can be a solution for these future challenges. To link the important phenomena "smart city, smart grid, electric vehicle" the paper on the one hand suggests a methodical approach of the communication design between these complex systems and on the other hand considers their influence on the functional behavior of the power net.