Electrical field based wireless devices for contactless power gird phasor measurement

In conventional power grid phasor measurements, the transformers must be physically connected to lines or buses being measured for acquiring the input voltage signal. This paper presents an innovative contactless phasor measurement device, the wireless frequency disturbance recorder (wireless FDR), to realize contactless power grid phasor measurements based on the electrical field generated by high-voltage power transmission lines. The wireless FDR has the merit of portability and flexibility, making it possible to obtain the phasor parameters at any point under the transmission line. Both the laboratory and field test results show that the wireless FDR satisfies the requirements for power system phasor analysis.