【摘要】：為解決陡上升/下降沿脈沖方波電壓下變頻電機絕緣局部放電(PD)檢測的信號提取問題,對比研究了高頻電流傳感器和超高頻法測試中局部放電和脈沖電源干擾的時域和頻域特性。針對2種信號的不同特征,提出了抑制脈沖電源干擾、提高信噪比的方法。研究結(jié)論認為,依據(jù)IEC標準進行變頻電機局部放電檢測時,超高頻法在局部放電起始放電電壓測試和脈沖信號提取中表現(xiàn)出較高信噪比(S/N)性能,可優(yōu)先選用。相關(guān)系數(shù)分析方法可作為局部放電脈沖是否淹沒在脈沖電源干擾中的有效判據(jù),聯(lián)合采用相關(guān)系數(shù)分析和sym2小波提取技術(shù)后,寬頻電流測試法仍可在需要的場合作為變頻電機絕緣局部放電檢測的有效補充。
[Abstract]:In order to solve the problem of signal extraction from insulation partial discharge (PD) detection of frequency conversion motor with steep rise / fall along pulse square wave voltage, the time domain and frequency domain characteristics of partial discharge and pulse power supply interference in high frequency current sensor and ultra high frequency method are compared and studied. According to the different characteristics of the two signals, a method to suppress the interference of pulse power supply and improve the signal-to-noise ratio (SNR) is proposed. It is concluded that the ultra-high frequency method shows high signal-to-noise ratio (S 鈮，

本文編號：2514198