ReFlex: Market-Based Redispatch in Distribution Grids – Incentivizing Flexible Behavior of Distributed Energy Ressource

Abstract

Distributed energy resources (DER) such as combined-heat-and-power-plants (CHP) or energy storages offer an inherent potential for flexible behavior. In this context, flexibility refers to a DER s ability to shift generation (or consumption) times due to external requirements or incentives. Against the background of a growing demand for participation of DER at the provision of ancillary services especially at distribution system level, both new economical incentives and new technical concepts for a reliable integration and coordination of distributed flexibilities are necessary. In this contribution, we therefore introduce the "Redispatch with Flexibilities of network users (ReFleX)" concept of a market-based redispatch in distribution grids, especially aiming at an economically optimized congestion management by actively incentivizing flexible behavior of DER. For that purpose, localized active power products are dynamically placed at an Intraday-market place depending on the expected grid operational state. The aspect of localization refers to a new property of power products: Their contribution is restricted to certain spatial areas of the distribution system, e.g. to a certain set of nodes in a given power grid. Thus, if an analysis of grid capacity utilization reveals possible congestions or violations of the mandatory voltage levels in certain grid areas, adequate quantities of generation or load bids can be placed in order to proactively avoid or reduce unwanted power grid states.