Electric energy measurement in digital substation on a number of issues discussed

With the breakthrough of electrooptical technology research on sensor application, the promulgation of IEC 61850, the application of Ethernet communication technology and the development of intelligent breaker, digital substation has become the mainstream of substation automation technology development in future. This paper briefly discusses issues related to electric energy measurement in digital substation, including the differences between electric energy measurement in digital substation and conventional substation, the impact to energy measurement of electronic transformer´s application. Meanwhile, aiming at the present issues, potential research fields of electric energy measurement in future digital substation is proposed as well.