- 學位論文
高壓用戶設備運轉檢測及故障分析之研究
A Study of Equipment Operation Maintenance and Fault Analysis at High-Voltage Customer Side
摘要
本文針對高壓用戶設備運轉檢測技術進行系統化的整理，其中檢測工作牽涉到較多的電氣技術，而與絕緣有關的檢測對人員與設備的安全關係最密切。如對目前常用之三種絕緣檢測法進行分析探討，則絕緣電阻法對於判定絕緣材料好壞之檢測能力最差，惟可迅速確認待測物表面之清潔與否；而介質電力因數法對於絕緣材料整體化程度之辨別最有效，但卻無法判別絕緣材料有無瑕疵存在；另部分放電檢測法則與介質電力因數法相反，其對於絕緣材料瑕疵之檢測最具效果，但對於絕緣材料整體之劣化程度，則較難辨別。 另對於高壓用戶設備運轉檢測其判斷之技術、標準、方法及各項檢測原理、檢測之優缺點，以及現行所使用之儀器設備，本文均詳細加以描述分析。為避免因單一檢測法造成偏差而影響判斷結果，配合現場被測設備之各種限制，建議交互應用各種不同檢測法進行測試。最後，本文亦藉由台南科學園區某科技廠避雷器所引發配電箱內起火燃燒事故，使用電磁暫態模擬程式進行故障分析，並提出選用附隔離器型避雷器、裝置避雷器接地線洩漏電流檢知器或將接地網彼此相連等三種防制對策，以供高壓電力用戶進行設備運轉檢測維護之參考。
並列摘要
This thesis presented the systematic arrangement of the electrical equipments maintenance and measurement technique in distribution system. Those jobs involve not only for the measuring of equipments also about the safety of personnel. The measurement method of insulation resistance in equipments is the simplest that only can confirm rapidly the equipment superficial is clean or not. The measurement method of medium power factor can distinguish most effective of insulation material in all. Also, the measurement method of partial discharge has result of with measuring of equipments. Simultaneously, this thesis also presented the lightning arrester failure to induce the ground fault accident in customer side system. This high-voltage customer is supplied by two feeders at Tainan Science Park. Due to the lightning arrester failure then causes the ground potential rise to burn the head of underground cable that does not use but remove yet. The accident wave forms had been to re-build from the record of digital protection relay. Also, the resistance value of the ground systems was measured after accident. This thesis utilizes the simulation results of the electromagnetic transient program to analyze the reason in accordance with the power system states happened at that time of accident. There are included electric equipment grounding, lightning arrester grounding and systematic interconnection state to make a prevent strategy and offer the countermeasure of improving by promoting the quality of power supply.