Abstract
This article presents the results of experimental tests of a measuring system dedicated to the study of lightning phenomena. A wireless non-real-time communication arrangement was used as a prototype to protect the system by overvoltage and electromagnetic noise generated by high-current pulses. All data were collected after analog-to-digital conversion in the RAM of the measuring probe and then transmitted to the recorder after the surge current disappeared. The current generator creates electromagnetic disturbances resulting from its work and those arising from the impulse generated at the output. The wireless measuring system ensures safe operation and avoids measurement disturbances by resigning from the physical connection of the probe and the recorder. The proposed solution enables simultaneous (synchronous) measurement at many points, regardless of the location (for convenient change of the measurement site without cables or optical fibers). Long battery life allows measurements in the laboratory or on the test site without a power source. High accuracy of the measured signal value was obtained thanks to the 16 bit resolution, and the device parameters can be remotely modified. The wireless connection guarantees the safety of people and equipment throughout the laboratory.
Highlights
The proposed measuring system in this paper can be compared to a wireless oscilloscope while maintaining some of its functionality
It is designed for specific applications, in particular, measuring the value of discharges induced by surge generators
Rogowski coils and high-voltage measurement probes are most often used to measure different surge waveforms [28,29]. They are used both for recording the lightning current, as well as during laboratory and field tests using impulse current/voltage generators [30]
Summary
The proposed measuring system in this paper can be compared to a wireless oscilloscope while maintaining some of its functionality. It is possible to perform preliminary measurements while maintaining a high quality of recorded data without the risk of overvoltage The use of such devices is justified among others during the study of lightning effects, both natural and simulated by specialized impulse generators. They enable the recording of fast-changing waveforms with a voltage up to megavolts and a current in the order of a hundred kiloamperes They must perform measurements with a high sampling frequency due to the nature of lightning phenomena [6,7]. Rogowski coils and high-voltage measurement probes are most often used to measure different surge waveforms [28,29] They are used both for recording the lightning current (mainly at stations located at high facilities), as well as during laboratory and field tests using impulse current/voltage generators [30]. These are systems designed for larger objects and do not allow for precise measurement when there are more than one conductor
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