Definition and Calculation of Power Limit Values for Distribution Grids - Basics of Comprehensive Demand Side Managemen

In order to achieve the objectives of the energy transition, flexibility of demand and generation has to be utilized with the coupling of different energy sectors. To avoid congestion in the distribution network a pure market-based integration of flexible units is not permitted. Rather, a comprehensive demand side management (DSM) similar to the management in the transmission grid is necessary. In contrast to transmission grid the method has to be automated and has to provide a simple parameter which describes the grid capacity. This paper defines therefore the power limit value (PLV) of the distribution grid. The PLV is thereby determined on the basis of a forecast of all non-controllable loads and generation units in the network. The calculated values define limits within the planing period were energy trade can take place without restrictions. The paper presents a method for calculating the PLV. The usage of the method is illustrated in a low voltage distribution grid.