- 期刊
氣體絕緣變電所部分放電之線上量測法比較與分析
Comparison and Analysis of On-line Partial Discharge Measurement Methods for Gas Insulation Substation
摘要
本文探討如何將音射(Acoustic emission)檢測法應用在氣體絕緣變電所(Gas Insulation Substation)局部放電(Partial Discharge)之線上量測，並與高頻比流器(Current Transformer)及高頻耦合電容(Coupler Capacitor)等電氣法做比對，以分析判斷部分放電之發生位置。一般由高頻電磁場量測到的部分放電信號難以判斷部分放電的確切位置，而音射檢測法指向性高，只要量測到部分放電的信號，即可以判斷出部分放電產生的位置，在那一段區域。我們使用低頻型，頻寬在23~80 kHz的音射感測器，針對161 kV氣體絕緣變電所進行線上檢測。由實際量測結果經分析比對，可以確定量測到GIS之部分放電源位置。
並列摘要
In this paper, we compare and analyze the signals of acoustic emission (AE), high-frequency current transformer (HFCT) and capacitive coupled (CC) inspection methods when they are used to detect the partial discharge (PD) in gas isolation substations (GIS). The PD location feasibility of the AE method is also studied. In general, the leakage currents are measured by using the HFCT. And the electric fields are measured by using the CC sensors. However, the PD signals measured from the electric methods are usually hard to determine their accurate location while the AE method has good direction ability. Since the frequency of PD signals from AE measurements is usually less than 100 kHz, within the specific location, we can use AE sensors with frequency response range from 23~80 kHz to do the on-site, long-term observation. From the practically measured results, we definitely obtained the location of PD signals in a 161kV GIS.