Effects of flexibility market models on grid management tasks and systems

Abstract

Existing electricity markets assume for trading and pricing a restriction-free power grid. The congestions within the existing power grid cannot be mapped within current markets so far. Driven by this shortcoming and the increasing number of decentralized energy resources causing increasingly more grid congestions, the model of flexibility has been introduced. A flexibility market using it is commonly considered necessary to operate an efficient electricity grid. Using flexibility, grid expansion can be delayed or even avoided. Currently, various flexibility models are discussed.Within this paper, the properties of the two major flexibility model variants “regional intradayplus market” (RIM)” and “quota in proactive distribution grids (PDG)” are considered. The flexibility market offers opportunities and risks to system management of the concerned distribution grid, which will be examined in this paper. Finally, the necessary scope of further investigations is presented.