Energy Sharing Concepts – Comparing Large Scale Local Energy Markets and Collective Self Consumption

End customers can perform energy sharing through Collective Self Consumption (CSC) and in Local Energy Markets (LEMs). While CSC is often performed in energy communities collectively investing in a PV system, LEMs can be applied to communities with distributed generation systems. To compare both concepts, we introduce a model that simulates CSC and LEMs for large-scale energy communities. The model solves a linear optimization problem representing all participants with their generators, loads, and flexibility. Each participant can self-consume electricity, buy or sell it to an energy supplier, or share energy with other participants. We apply our model to a large-scale energy community with 1300 participants. The results show that CSC and LEMs benefit all participants. CSC restricts energy sharing more than LEMs, leading to lower self-sufficiency rates.