A test case with a High Penetration of Renewable Energy Resources in Different Operational Modes

摘要

A model of a DC local distribution grid with penetration of distributed energy resources (DER) is studied that are expected to increase significantly in the future. Because the existence AC distribution networks are not optimally designed for bidirectional energy flows caused by the distributed energy resources (RES, storage energy systems, PHEVs), a replacement of delivering DC power in conductors for existing AC network is assumed. Therefore, a DC distribution grid with participation of renewable energy resources will be presented in different operational modes to evaluate the efficiency of power control solution using DC signal in terms of power flow and total losses. A comparison with AC power flow is the same grid is also introduced to clarify the viable alternatives of a low-voltage DC grid for bidirectional power flow in future.