本文選題：油紙絕緣 + 絕緣評估�。� 參考：《電機(jī)與控制學(xué)報(bào)》2017年03期

【摘要】：針對目前變壓器油紙絕緣老化狀態(tài)評估中的紙板聚合度測定破壞性取樣、介電響應(yīng)法測量沒有定量判據(jù)等問題,提出一種基于Davidson-Cole模型的現(xiàn)場絕緣老化狀態(tài)定量評估方法。首先仿真研究Davidson-Cole模型參數(shù)提取方法,借助現(xiàn)場測量的去極化電流數(shù)據(jù),計(jì)算出油紙絕緣等值電路參數(shù)與頻域復(fù)介電常數(shù),并利用所得數(shù)據(jù)繪制Davidson-Cole圖,采用多變量最小二乘擬合方法得出松弛時(shí)間、介電常數(shù)變化量等Davidson-Cole模型參量。實(shí)驗(yàn)研究了油紙絕緣不同老化程度的Davidson-Cole模型,采用非線性擬合方法對其老化狀態(tài)進(jìn)行Davidson-Cole模型參量提取并分析參數(shù)變化,研究結(jié)果表明,模型參數(shù)與老化程度有直接關(guān)系,仿真結(jié)果與實(shí)驗(yàn)結(jié)果一致,對變壓器油紙絕緣老化狀態(tài)評估有參考價(jià)值。
[Abstract]:In order to solve the problems of destructive sampling of paperboard polymerization degree measurement and no quantitative criterion in dielectric response measurement, a quantitative evaluation method of in-situ insulation aging state based on Davidson-Cole model is proposed. First, the Davidson-Cole model parameter extraction method is simulated and studied. With the depolarization current data measured in the field, the equivalent circuit parameters and the complex dielectric constant in frequency domain are calculated, and the Davidson-Cole diagram is drawn with the obtained data. The Davidson-Cole model parameters such as relaxation time, dielectric constant and so on are obtained by using multivariable least square fitting method. The Davidson-Cole model of different aging degree of oil-paper insulation is studied experimentally. The parameters of Davidson-Cole model are extracted and analyzed by nonlinear fitting method. The results show that the model parameters are directly related to the degree of aging. The simulation results are consistent with the experimental results, and have reference value for evaluating the aging state of transformer oil paper insulation.
【作者單位】： 哈爾濱理工大學(xué)電介質(zhì)工程國家重點(diǎn)實(shí)驗(yàn)室培育基地;云南電力技術(shù)有限責(zé)任公司;
【基金】：國家自然科學(xué)基金(51277047) 國家自然基金青年項(xiàng)目(51407051) 黑龍江省自然科學(xué)基金(E201450/E070201)
【分類號】：TM855
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本文編號：1899964