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Since the amount of decentralised power generation is increasing it is important to develop an energy management system for low-voltage grids. This paper presents a method to operate such a management. The system is designed for managing a network of smart homes which can consume or supply electrical energy. The aims are to reduce the transmission losses and to stay within the limits of both, the voltage drop and the utilisation of lines and transformers. The reduction of the losses is implemented in the Loss-Optimising-Management- Algorithm (LOMA). This algorithm tries to find the power flow situation where minimal losses occur. The results of LOMA, the actual power situation (in low- and medium-voltage system) and the maximum power situation (based on the grid parameters) are summarised in an individual incentive signal for every smart home. The simulations show the feasibility of such an energy management and that significant loss reduction is achieved.

Loss-Optimised-Management-Algorithm and the usage in an energy management for low-voltage grids