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A diagnostic system for electrical faults in a high current discharge plasma setup.
S Nigam1, K Aneesh, C P Navathe
1Raja Ramanna Centre for Advanced Technology, Indore, India. snigam@rrcat.gov.in
The Review of Scientific Instruments
|March 3, 2011
Summary
A new diagnostic system uses antennas and sensors to detect electrical faults in high-current discharge devices. The system analyzes signal frequencies to identify normal or faulty discharge events.
Area of Science:
- Electrical Engineering
- Plasma Physics
- Electromagnetics
Background:
- High current discharge devices are crucial in various scientific and industrial applications.
- Detecting internal electrical faults is essential for operational safety and efficiency.
- Existing diagnostic methods may lack precision or real-time capabilities for complex discharge systems.
Purpose of the Study:
- To develop and validate a novel diagnostic system for identifying electrical faults within a coaxial high current discharge device.
- To correlate electromagnetic radiation patterns and electrical signals with specific fault conditions.
- To provide a reliable method for distinguishing normal discharge events from breakdown faults.
Main Methods:
- Utilized biconical antennas to capture electromagnetic radiation from the discharge.
- Employed a voltage divider to monitor input voltage and a Rogowski coil for discharge current measurement.
- Developed a computer program to analyze frequency components of the collected signals.
- Conducted electrical simulations and experimental tests on a 450 kV, 50 kA capillary discharge plasma setup.
Main Results:
- The diagnostic system successfully differentiated between normal and faulty discharge events.
- Normal discharges exhibited a dominant frequency of approximately 4 MHz.
- Faulty conditions resulted in distinct changes in the magnitude versus frequency plot of antenna signals, correlating with fault position.
- Simulations and experiments confirmed the system's ability to localize faults based on signal variations.
Conclusions:
- The presented diagnostic system offers an effective method for detecting and localizing electrical faults in coaxial high current discharge devices.
- Frequency analysis of electromagnetic and electrical signals provides valuable insights into discharge behavior.
- This technique enhances the safety and reliability of high-energy plasma systems.
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