本文關(guān)鍵詞： 特高頻 傳感器 有效高度 時(shí)域參數(shù) 反卷積 Guillaume-Nahman技術(shù) 脈沖響應(yīng) 包絡(luò)　出處：《高電壓技術(shù)》2015年05期 　論文類(lèi)型：期刊論文

【摘要】：時(shí)域信號(hào)特征分析是直流局部放電類(lèi)型判斷和嚴(yán)重程度分析的重要手段,而局部放電特高頻檢測(cè)傳感器普遍采用頻域有效高度作為主要性能參數(shù),無(wú)法直觀描述傳感器的時(shí)域響應(yīng)特性。因此提出一種通過(guò)時(shí)域參數(shù)表征特高頻傳感器性能的方案:在有效高度標(biāo)定體系的基礎(chǔ)上,經(jīng)由Hilbert變換獲取時(shí)域解析脈沖響應(yīng)函數(shù),并提取出包絡(luò)峰值、包絡(luò)寬度和振蕩時(shí)間3種時(shí)域參數(shù)。利用Guillaume-Nahman技術(shù)克服了頻域反卷積求取時(shí)域參數(shù)過(guò)程中的病態(tài)問(wèn)題,避免脈沖響應(yīng)淹沒(méi)于高頻噪聲之中。使用該方案仿真研究了橢圓偶極子傳感器和對(duì)數(shù)周期傳感器的時(shí)域特性,結(jié)果顯示后者的時(shí)域響應(yīng)波形具有更高的峰峰值、更短的上升時(shí)間和更嚴(yán)重的拖尾效應(yīng),并通過(guò)模擬局部放電實(shí)驗(yàn)驗(yàn)證了該結(jié)論。研究結(jié)果表明,利用本方案提取出的時(shí)域參數(shù)與有效高度參數(shù)相比,能夠更準(zhǔn)確地描述UHF傳感器在接收脈沖信號(hào)時(shí)的行為特征,可為局部放電UHF檢測(cè)信號(hào)時(shí)域波形的有效對(duì)比和分析提供技術(shù)支撐。
[Abstract]:The characteristic analysis of time domain signal is an important means to judge the type and severity of DC partial discharge, and the effective height in frequency domain is generally used as the main performance parameter in UHF PD detection sensor. The time domain response characteristics of the sensor can not be described intuitively. Therefore, a scheme to characterize the performance of UHF sensor by time domain parameters is proposed. Based on the effective height calibration system, the analytical impulse response function in time domain is obtained by Hilbert transform. The time domain parameters of envelope peak value, envelope width and oscillation time are extracted, and the ill-conditioned problem in frequency domain deconvolution is overcome by using Guillaume-Nahman technique. The time domain characteristics of elliptical dipole sensor and logarithmic period sensor are studied by simulation. The results show that the time-domain response waveform of the latter has higher peak value. This conclusion is verified by simulated partial discharge experiments. The results show that the time domain parameters extracted by this scheme are compared with the effective height parameters. It can more accurately describe the behavior characteristics of the UHF sensor when it receives the pulse signal, and can provide technical support for the effective contrast and analysis of the time-domain waveform of the PD UHF detection signal.
【作者單位】： 上海交通大學(xué)電氣工程系;國(guó)網(wǎng)天津市電力公司電力科學(xué)研究院;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)(2014CB239506)~~
【分類(lèi)號(hào)】：TM855

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本文編號(hào)：1536736