Grid Aware Portfolio Optimization of a Multi-Energy DER

With the rapid increase in distributed generation and demanding loads such as heat pumps and electric vehicle chargers, the distribution grid is increasingly congested, and devices must be curtailed. In many cases, this can be avoided by installing a flexibility providing Distributed Energy Resource (DER) and considering the congestion of the grid in the planning process of the DER. Although previous studies have examined the design and com-position of DERs, the surrounding electrical grid is often not considered. The present paper extends these studies and shows how the portfolio of a complex multi-energy DER can be designed to be cost-optimal for a specific location i n t he grid while simultaneously providing grid-supporting services. For this purpose, an algorithm is outlined that minimizes the total cost of the D ER, i.e., investment and operation, while relieving the surrounding electrical grid. Two case studies demonstrate the effectiveness of using such a multi-energy DER to reduce line utilization in the distribution system, thereby preventing curtailment of renewable generation at minimal cost.