Technology of range selection on combined electronic current transformer

Along with the development and construction of smart grid and smart substation, the research on the electronic current transformer develops deeply. In order to achieve the measuring requirements of high accuracy and broad range, a new design of combined electronic transformer is proposed in this paper based on the analysis of current technology; the waveform smooth algorithm is adopted to solve the skipping problem which may occur at the time of data switch. At the end, MATLAB Simulations verify the feasibility of the algorithm. This paper will be helpful in the design of combined electronic current transformer.