1372

Supraharmonic source such as electric vehicles and new energy power generation devices are connected to the grid through transformers, which lead to an increasing supraharmonics content in the system. At present, there are few studies on the transfer characteristics of transformers under background of gird supraharmonics. The influence of the internal physical properties of transformer on transfer characteristics are needed to be further studied. In this paper, based on the high frequency model of transformer with distributed capacitance, the voltage gain and current gain functions are derived. Furthermore, the influences of distributed capacitances and leakage inductance on transfer transformation characteristic is revealed, which has significant reference to solve the problem of supraharmonics in power system.