The Design and Improvement of High Voltage Side Circuit in Electronic Current Transformer

As well known, electronic transformer has the advantages of wide dynamic range, small size and adaptability for the development of digitization. In this paper, a design method of the high voltage side circuit in an active electronic current transformer is introduced at first. The circuit obtains the output signal of sensor and converts it into optical signal; thus the fiber would be utilized to transfer it to the low voltage side. And then, the test combined high-voltage side circuit with low-voltage side circuit is carried out, circuit design problems could be found and solved during this test. At last, some related technologies are introduced such as embedded system and testability, and the high voltage side circuit is redesigned considering the improvement of reliability, intelligent degree and the reduction of power consumption