Using automated market analysis for optimized economic operation of DER in Virtual Power Plants

Wissing, Carsten and Appelrath, H.-Jürgen
The German market for control reserve is subject of large changes. The German Transmission System Operators (TSO) cover their need for control reserve via a common tendering procedure. The German Federal Network Agency (Bundesnetzagentur) made changes to the market design, that enables Virtual Power Plants (VPP) to participate in the control reserve market with an dynamic pool of assets, that may swap its assets within the pool every 15 minutes. Especially the minute reserve market with its four hour slots is aimed at by new market participants. To assist the (competitive) bid strategy of a VPP operator, a tool was build up as a prototype to fetch historical market data of the bidding, the outcome and the activation of the control reserve. Using the typical process of extracting, transforming and loading data from several sources to a database system several important hints for an optimized bidding could be extracted from the control reserve market. Due to the market data analysis the historic release order frequency can be estimated by a given price per kWh. The reverse process enables to estimate a price per kWh for the bidding, that would have lead to the targeted activation hours. With this tool a VPP operator is able to optimize his bidding strategy due to historic market development for his energy assets within a VPP. The focus of the work presented here were assets used as backup power supply that are being used within the minute reserve market. The future work will concentrate on the participation of cogeneration plants within the control reserve market. While the backup power supply system aims at positive minute reserve products, cogeneration plants (CHP: combined heat and power plant) aim at negative minute reserve products. The combination of both will be the topic of future investigations. In this work we present both the approach and the tool chain presenting example data for the German control reserve market.
05 / 2012
European University Institute