A Broadband Response Model of Electronic Current Transformer Applied in Smart Grid

摘要

With the construction of smart grid, ECT has become one of the main electromagnetic sensitive object, which greatly increased the possibility of EMC problems. This paper mainly focuses on the transmission characteristics and sensitive factors of ECT. A broadband equivalent model is proposed to study the effect of primary side conducted interference on ECT secondary side sampling module. It is found that the high frequency component of secondary side signal increases, which may become one of the main causes of electromagnetic compatibility problems in smart grid.