Method and device for determining voltage drop for building electrical design and computer readable storage medium

The invention relates to the technical field of building electrical design, in particular to a voltage drop determination method for building electrical design, comprising the following steps: building a BIM structure model of a target building; based on the BIM structure model of the target building, building a BIM electric power system model comprising wires and electric power equipment; obtaining a length value of a wire in the BIM power system model; obtaining a load calculation current in the BIM power system model by adopting a demand coefficient method; based on a load calculation current in the BIM power system model, obtaining a sectional area value of a wire in the BIM power system model; and according to the load calculation current in the BIM power system model, the length, the sectional area and the material of the wire, determining the line voltage drop. According to the method, the building electrical circuit voltage drop can be simply and effectively calculated. 本申请涉及建筑电气设计技术领域，特别涉及一种建筑电气设计用电压