This article addresses the suitable approaches for empowering energy citizens and smart energy communities through the development of community-based microgrid (C-MG) solutions while taking into consideration the functional architectural layers and system integration topologies, interoperability issues, strategies for consumer-centric energy trading under the local electricity market (LEM) mechanism, and socio-economic aspects. Thus, this article presents state-of-the-art microgrid solutions for the smart energy community along with their motivation, advantages and challenges, comprehensibly contrasted between the recommended generic architecture and every other reported structure. The notion of LEM for peer-to-peer (P2P) energy exchange inside a transactive energy system based on a flexible consumer-centric and bottom-up perspective towards the participation in the wholesale electricity market (WEM) is also reviewed and critically explored. Furthermore, the article reviews the interoperability issues in relation to the development of C-MG including energy trading facilities. The article’s overall contribution is that it paves the path for advanced research and industrialisation in the field of smart energy communities through the analytical recommendations of the C-MG architecture and DER (distributed energy resource) integration structure, considering the future trend of local energy markets and socio-economic aspects.

In the last two decades, electricity grids have faced many challenges that they were not designed to handle. These include integrating weather-dependent renewables, distributed generators, storage units and other advanced components, as well as taking into account active demand. These challenges, together with the ageing of infrastructures, make it more difficult to deliver cost-effective, reliable power. To overcome these issues requires creating new network architectures. The research project Fractal Grid proposes fractality as a core concept to model, analyse and design smart grids in their evolution up to 2030 and beyond. This study presents the project, its methodological approach and the first results.

In this paper, a thorough analysis of quantification of the heating appliances’ flexibility provided by 200 households located in the Sion area (Switzerland) is presented. An extended evaluation of the available flexibility throughout the year as well as a correlation analysis between the outside temperature and flexibility is performed. The influence of pooling households in the prediction process is assessed. The impact of cutting the power to heating appliances and the incurred rebound effect are also described.

Due to the current climate situation, it is necessary to apply new methods that support environmental, social, and energy challenges to respond to global emergencies. In this regard, Living Labs have increased their popularity as a strategic tool to promote innovation from the local level and proximity. This study aims to detect the patterns, trends, and coherence of the so-called Living Labs. For this purpose, a characterisation of Living Labs has been undertaken that focuses on energy, environmental, and social issues in Europe to support urban transition. It concludes that Living Labs do not have a single solution. They are highly influenced by the current European trends and promoted topics. They can be multi-dimensional (digital and physical), multi-scale (from small, such as the product, to large, such as the territory) and multi-purpose. It is determined that there is an absence of working in real-life environments and some of the Living Lab’s principles. Among the topics, the most common ones are social inclusion, environment, energy, health, and IoT. The implemented scale in a building and the product on the application scale are the most frequent ones. Urban Living Labs are identified as a niche opportunity because of their low current development.