對模擬局部放電的窄脈沖和陡前沿脈沖沿電纜的傳播特性進行了實驗研究。在兩段不同長度的電纜首端分別注入窄脈沖和陡前沿脈沖,同時記錄首末端波形;分析了不同頻率下脈沖在電纜中的傳播和衰減情況,并提出了電纜局放檢測用傳感器頻率的選擇原則。
關鍵詞: 　XLPE 電力電纜; 傳播特性; 局部放電
Abstract : 　The propagation characteristics of a simulation partial discharge (PD) pulse and a steep2front pulse in the XLPE power cable are investigated. Both the narrow pulses and the steep2front pulses are applied to the initial terminal of the XLPE cable respec2 tively, and the oscillograms at both terminals are simultaneously recorded using a digital oscilloscope. The characteristics of propaga2 tion and attenuation of pulses with different frequencies are ana2
lyzed , and then the determination philosophy of the bandwidth of the sensor for PD detection in cable is proposed.
Key words : 　XLPE power cable ; propagation characteristics ; partial discharge