Abstract
Ohm’s law and Electromagnetic Induction law are two fundamental laws used for the current measurement. However, these two methods require putting resistance into the circuit or magnetic sensor close to the line, which is dangerous when the wireline has high voltages. To improve the safety, this paper proposes a non-contact far distance current measurement method, which is in conjunction with a fuse-like radiant sensor made of metal foil and an infrared radiation (IR) camera, without any additional conjunction line. Nature behind that is a mathematical model based on another law, Joule Heating. The mathematical model unifies the alternating current (AC) and heat conduction equation in the dynamic process, quantitatively determines the relationship between the sinuous temperature variation and current amplitude along the wireline. Experiments verify that the proposed method can measure current with the relative error within ± 3.66 % in the range of 1.05–3.45Arms at power frequency (50 Hz) from 1 m away. Therefore, the proposed method has a bright future for electric current measurement of tour inspection, especially in high voltage transmission systems.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
