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...Show More
The development of an optical instrument transducer to measure rotor's voltage and current in power generator is described in the paper. The system is based on A/D conversion and optical fiber transmission principle. The voltage/current signal from SCR bridge of an power generator is conditioned to ADC and than the digital signal from ADC is transmitted to local module through optical fiber. The u...Show More
For measuring current in three-phase plate-form busbars, this paper proposed an indirect method that used planar Rogowski coil as the current sensing part. Based on the electromagnetic induction law, Biot-Savart law and the numerical integration arithmetic, the vector potential of the busbar was calculated and the Electromotive force of the planar coil for the single phase and three-phase busbar c...Show More
