EVALUATION OF NONSINUSOIDAL LOAD CURRENT EFFECTS IN DISTRIBUTION TRANSFORMER PERFORMANCE

The usage of nonlinear loads such as computers, CFLs and… on power systems has increased the awareness of the potential reduction of a transformer’s life due to increased heat losses. The performance analyzes of transformers in a harmonic environment require knowledge of the load mix, detail of the load current harmonic content and total THD. The additional heating experienced by a transformer depends on the harmonic content of load current and the design principals of the transformer. In this paper, performance of 1000 KVA distribution transformer under supplying nonlinear loads with measured THD% and load factor has been evaluated. The effect of current harmonics on load losses has been analyzed and then the derating capacity of transformer is calculated on the base of IEEE C57-110 standard recommendations

کلیدواژه ها:

Distribution Transformers ، Harmonics ، Nonlinear Loads ، Current THD