Rising energy consumption and climate change pose global challenges. The European Union has set three targets in its climate and energy policy that it aims to meet by 2030. In addition to reducing greenhouse gas emissions by at least 40 % compared to 1990 levels, the share of renewable energy sources should be increased to at least 27 % and energy efficiency by at least 27 %. The shift from fossil fuels to renewable sources of energy creates new opportunities, but also challenges. For the integration of renewable energy sources, different concepts have been developed, such as microgrids or virtual power plants, which are constantly being investigated and improved. Essential for these approaches, however, is the expansion of the existing energy network by means of communication technology to form an intelligent power grid, the Smart Grid. The end user assumes an active role in a smart grid, e.g, load peaks can be reduced in cooperation. This will be facilitated by the digitization of end users using smart meters and the transition to the smart home. One promising technology, that is currently being explored in smart grids is the blockchain, which is used to realize different processes in smart grids, that are characterized by a decentralized structure, of which the best-known application is the local P2P energy trading. The aim of the diploma thesis was to build a blockchain platform as a proof-of-concept whose focus is on the protocolling of energy production, energy consumption and energy trading. The participants of the platform can own a portfolio of different installations, such as photovoltaic systems, batteries, electric cars and diesel generators. In a real-life environment, participants would be equipped with smart meters or IoT devices that interface with the platform. A central authority, under the control of an energy company or a municipality, would be responsible for the administration of the platform, i.a. responsible for the registration of the smart meters and IoT devices as well as the further processing of the data. The blockchain platform is extensible so that other applications can be realized, e.g., the settlement of penalty payments in case of non-compliance with voltage limits. Due to the enforcement of the General Data Protection Regulation (GDPR) on 25th May 2018 in the European Union, this thesis lays a special focus on privacy. To validate the features of the proof-of-concept, a model region was simulated using Raspberry Pis. In order to simulate a realistic scenario, existing load and generation pro les were used. With the help of the implemented platform, an evaluation was made regarding performance and data protection. Finally, conclusions are drawn to be able to provide recommendations for integrating the blockchain platform into a real-life environment, such as Groschönau, Green Energy Lab, or Act4.energy in Burgenland.