CAJ | 학술논문

为了探索频域介电谱测试结果的解释方法，提升其应用于油纸复合绝缘状态无损检测效果，在深入研究频域介电响应理论的基础上，首先在实验室内构建了油纸绝缘频域介电谱试验平台，然后分析了电导及极化损耗的机制及特性，重点讨论了复介电常数与电场频率之间的关系，提取了典型损耗特性规律，并建立了基于电导及极化损耗模型的频域介电谱理论解释方法。研究表明：复介电常数谱在低频段的特征主要因电导损耗作用所致，可用Dyre模型解释；在高频段的特征主要是因极化损耗作用所致，可用H-N模型解释；而中频段特征则是因电导及极化损耗共同作用所致，可用两种理论模型联合解释。通过该方法可获得复介电常数重构曲线，其与频域介电谱实测曲线具有良好的一致性。所提出的频域介电谱解释方法依据 FDS 测试结果对油浸纸板复介电常数谱进行分析与拟合，分别获得了电导为主、极化为主的损耗与电场频率之间的统计函数关系，可进一步应用于介电响应特征参数提取，从而为油纸绝缘状态定量评估奠定一定的理论基础。
위료탐색빈역개전보측시결과적해석방법，제승기응용우유지복합절연상태무손검측효과，재심입연구빈역개전향응이론적기출상，수선재실험실내구건료유지절연빈역개전보시험평태，연후분석료전도급겁화손모적궤제급특성，중점토론료복개전상수여전장빈솔지간적관계，제취료전형손모특성규률，병건립료기우전도급겁화손모모형적빈역개전보이론해석방법。연구표명：복개전상수보재저빈단적특정주요인전도손모작용소치，가용Dyre모형해석；재고빈단적특정주요시인겁화손모작용소치，가용H-N모형해석；이중빈단특정칙시인전도급겁화손모공동작용소치，가용량충이론모형연합해석。통과해방법가획득복개전상수중구곡선，기여빈역개전보실측곡선구유량호적일치성。소제출적빈역개전보해석방법의거 FDS 측시결과대유침지판복개전상수보진행분석여의합，분별획득료전도위주、겁화위주적손모여전장빈솔지간적통계함수관계，가진일보응용우개전향응특정삼수제취，종이위유지절연상태정량평고전정일정적이론기출。
In order to explore the explanation of frequency-domain dielectric spectroscopy (FDS) and to improve the application to nondestructive diagnosis of insulating state for oil-paper insulation, the frequency domain dielectric response theory is studied further in this paper. Firstly, FDS measurement system for oil-paper insulation is established in the lab. Secondly, the mechanism and characteristics of conductivity loss and polarization loss are analyzed respectively. The classical loss characteristics of oil-paper insulation are outlined by a systematic analysis of the relationship between complex dielectric constant and frequency. And then a theoretical explanation for FDS is introduced based on conductivity loss and polarization loss. The test results show that at low frequencies, the characteristics of complex dielectric frequency spectra are mainly influenced by conductivity loss, which can be explained by Dyre model. At high frequencies, the characteristics are mainly influenced by polarization loss which can be explained by H-N model. In addition, the characteristics at middle frequencies are the results of conductivity and polarization loss. The reconstructed curve obtained by this method accords with the measured curve well. The presented explanation method in this paper is used to analyze and fit the complex dielectric frequency spectra of oil-paper insulation based on the test results of FDS. And the statistical function relationships either between frequency and polarization or between frequency and conductivity are obtained, which can be used to extract characteristic parameters of dielectric response. These build up the theoretical foundation for the quantitative assessment of insulating state.