绿色矿冶

Aiming at the problems of many calculation formulas, complicated calculation in traditional generator selection, the application of ETAP software in generator selection was discussed. Taking the actual project with the total capacity of 679.89kVA and the maximum capacity of 160kW for a single load as an example, the generators with capacity of 800kVA, 1000kVA and 1250kVA were selected to test. The start-up of the motor was simulated by ETAP software, and the generator selection was determined according to the changes of motor current, voltage and generator bus voltage. The results showed that when the generator capacity was 1250kVA, the maximum power motor start would not cause other emergency equipment power loss, and the start time was shortest, motor terminal voltage change was minimal. Compared with the traditional selection calculation method, the selection of generators by ETAP software can simplify the design work and improve the work efficiency, which provided a new method for the scientific selection of generators.