本文選題：氣體封閉組合開關 + 局部放電　； 參考：《華北電力大學(北京)》2017年碩士論文

【摘要】：局部放電特高頻檢測技術已在GIS局部放電檢測中得到廣泛應用,其檢測系統(tǒng)靈敏度對GIS局部放電的檢測效果至關重要。目前針對UHF檢測儀器的靈敏度校核有實驗室校核和現(xiàn)場校核。其中實驗室校核采用GTEM小室標定檢測系統(tǒng)的可測場強已被納入電力標準,但在計量領域,國內外尚且沒有針對脈沖場強進行一致性測量的標準,研究局部放電特高頻標定的場強溯源十分必要,現(xiàn)場校核主要受到傳感器的布置及脈沖注入水平的影響。針對上述問題,本文做了以下研究:理論分析了單極探針的傳遞函數(shù),并通過仿真與理論值進行對比,相似度達到96%以上,為進一步提高測試精度,對探針的安裝法蘭進行了設計。采用向GTEM小室注入掃頻和脈沖信號兩種方式對場強進行溯源。掃頻信號下,通過實測電場與單極探針計算結果進行對比,誤差在8%以內,驗證了單極探針標定穩(wěn)態(tài)場強的正確性;在脈沖信號下,采用CST仿真與探針計算場強進行對比,場強峰值誤差為1.7%,論證了單極探針標定脈沖場強的正確性�，F(xiàn)場校核方面通過對110kV、220kV、500kVGIS局部放電及模擬脈沖注入下UHF信號的傳播衰減特性、不同傳感器安裝方式下UHF信號的注入效率、檢測系統(tǒng)靈敏度等的研究,在此基礎上提出了現(xiàn)場校核脈沖注入水平的計算方法,并開發(fā)了相關軟件。最后基于以上研究提出了110kV、220kV、500kV典型GIS上UHF傳感器的布置方案,并分析了不同配置方案下的UHF檢測系統(tǒng)覆蓋范圍。
[Abstract]:Partial discharge UHF detection technology has been widely used in GIS partial discharge detection. The sensitivity of the detection system is very important to the detection effect of GIS partial discharge. At present, there are laboratory and field check for sensitivity check of UHF detection instrument. The measurable field strength of the calibration and detection system using GTEM cell has been included in the electric power standard, but in the field of measurement, there is no standard for consistency measurement of pulse field intensity at home and abroad. It is necessary to study the source of the field strength of PD UHF calibration. The field checking is mainly affected by the sensor arrangement and the level of pulse injection. In view of the above problems, this paper has done the following research: the transfer function of monopole probe is analyzed theoretically, and compared with the theoretical value by simulation, the similarity is over 96%, in order to further improve the testing accuracy, The installation flange of the probe is designed. The source of field intensity was traced by injecting sweep frequency and pulse signal into GTEM cell. By comparing the measured electric field with the calculation results of monopole probe, the error is less than 8%, which verifies the correctness of calibrating the steady-state field intensity of monopole probe, and contrasts with the calculation of field intensity by CST simulation under pulse signal. The peak error of field intensity is 1.7, which proves the correctness of unipolar probe calibration of pulse field intensity. In field checking, the propagation and attenuation characteristics of UHF signal under 110kV / 220kV / 500kVGIS partial discharge and analog pulse injection, the injection efficiency of UHF signal under different sensor installation modes and the sensitivity of the detection system are studied. On the basis of this, the calculation method of field checking pulse injection level is put forward, and the related software is developed. Finally, based on the above research, the layout scheme of UHF sensors on 110kV / 220kV / 500kV typical GIS is proposed, and the coverage of UHF detection system under different configuration schemes is analyzed.
【學位授予單位】：華北電力大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM595

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