No-load loss calculation of distribution transformers supplied by nonsinusoidal voltage using three-dimensional finite element analysis

摘要: Transformers are basically designed to operate under nominal voltage, rated frequency and also, pure sinusoidal load current. In recent decade, change in the type of loads increasing use power electronic devices with their nonsinusoidal current waveform has distorted system voltage as well. The losses transformers include no-load losses. No-load loss continuously led energy that connected network all 24 h. With respect high significance undesirable impacts on aging transformers, is considered a critical factor. Nowadays, it necessary apply suitable method for calculation presence harmonics over-excite conditions, especially distribution result harmonic increase particular applications. this paper, Finite Element Method (FEM) been used simulate effects transformers. Such simulation enables software analyze different electromagnetic parameters such flux lines, density, losses, etc input sources accuracy. addition, effect voltages investigated by typical experimental transformer using several practical tests.