Short-circuit Calculations in Hybrid AC/DC Microgrids

In this paper, the issues related to short-circuit calculations in hybrid AC/DC microgrids are discussed. The reference standard for short-current calculations in DC systems is the IEC 61660, which provides a mathematical formulation of the problem. The standard only includes radial DC grids and does not consider a more complex system, such as meshed DC systems or a hybrid AC/DC microgrid. This paper proposes a generalized approach that can be used independently of the characteristics of the hybrid system. The proposed approach is applied to two test microgrids and the results are compared with those obtained simulating the same grids with Neplan 360.

Automated summary

This paper discusses the issues related to short-circuit calculations in hybrid AC/DC microgrids. The current reference standard for short-current calculations in DC systems does not consider more complex systems such as meshed DC systems or hybrid AC/DC microgrids. To address this limitation, the paper proposes a generalized approach that can be applied independently of the characteristics of the hybrid system. The approach is validated through simulations on two test microgrids and compared with results obtained using Neplan 360.