Partial discharge combination detection with HF and UHF method for power cables

作者：Chen Qing Guo; Pu Jin Yu^*; Ding Ji Yuan; Li Hao; Sun Jian Tao; Zhang Shu Qi

来源：Electric Machines and Control, 2013, 17(4): 39-44.

• Combination detections
• Complex wavelets
• Impulse interference
• Interference suppression algorithms
• On-line detection
• On-line partial discharge
• On-site measurement
• Ultra-high frequency

In order to carry out an on-line partial discharge detection for the after-laying power cables and suppress interference occurring in the on-site measurement, the combination method with HF(High Frequency) and UHF(Ultra Frequency) measurement is proposed, and the on-line partial discharge detection system for power cables is established. The system consists of HF and UHF sensor, signal conditioning units, date-acquisition units and PC software, and the impulse interference was removed through mutual identification between the HF and UHF signal. Meanwhile the interference suppression algorithm of multi-cycle superimposition based on complex wavelet was put forward. The test results for defect cable show that the system can effectively detect the HF and UHF signals of partial discharge with the sensitivity lower than 10 pc, and the processing results for measured data show that the proposed method can suppress the interference well.

• 出版日期2013