研究目的
To develop a UHF sensor based on fractal butterfly antenna technology for effectively detecting electromagnetic waves propagating from placing holes in GIS steel flanges, overcoming limitations of traditional sensors.
研究成果
The fractal butterfly antenna sensor effectively detects UHF signals from GIS placing holes with high sensitivity (<20pC) and improved equivalent height compared to traditional sensors, demonstrating its suitability for practical applications in partial discharge monitoring.
研究不足
The study is limited to specific GIS configurations (e.g., 220kV), and the antenna's performance may vary with different environmental conditions. Optimization for broader frequency ranges or higher gains could be explored in future work.
1：Experimental Design and Method Selection:
The study involved designing a fractal butterfly antenna using HFSS software, incorporating fractal technology, a back cavity, and loaded resistors to enhance performance. Theoretical models for antenna characteristics (e.g., impedance, gain) were employed.
2：Sample Selection and Data Sources:
The antenna was tested using a GTEM chamber for equivalent height measurements and a 220kV GIS experimental platform with physical fault models (metal protrusion, surface contamination, free metal particles) for sensitivity and validity tests.
3：List of Experimental Equipment and Materials:
Equipment included HFSS software for simulation, GTEM chamber for testing, 220kV GIS setup, amplifier (20dB magnification, 0.3-2GHz), and materials like metallic components for the antenna and back cavity.
4：3-2GHz), and materials like metallic components for the antenna and back cavity.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Steps included antenna design and simulation in HFSS, fabrication using printing technology and welding resistors, testing in GTEM chamber for equivalent height, and applying high voltage in GIS to measure partial discharge signals.
5：Data Analysis Methods:
Data were analyzed using Fourier transformation to compute transfer functions (equivalent height), and performance metrics (VSWR, gain, axial ratio) were evaluated through simulation and experimental measurements.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
