The future city will produce, store, and consume energy in a way that is affordable for consumers, and is environmentally friendly. Researchers at the Tallinn University of Technology have a concept for creating electrical microgrids using digital substations equipped with energy storage devices. Community and business microgrids will create closed distribution systems, making it easier to provide innovative energy services to end-users. Using local renewable energy, personalized electric power system services, and smart substations, will reduce network congestion during peak consumption periods, and cut back on carbon-intensive electricity production. This will lead to cleaner air and more affordable energy, without compromising on consumer comfort.