CAJ | 학술논문

为研究热老化时间及测试温度对油纸绝缘时域介电特性的影响，以及更好地应用时域介电响应技术评估变压器油纸绝缘老化状态，首先进行了不同热老化时间及不同测试温度下油纸绝缘绕组模型的极化/去极化电流(polarization and depolarization current，PDC)测试，然后通过扩展Debye模型实现时域介电测试技术间转换，深入研究了热老化时间及测试温度对时域介电特性及其特征参量的影响，最后提出运用时间及幅值平移因子构造电流标准主曲线以消除测试温度对时域介电特性影响的方法。结果表明：油纸绝缘时域介电特性及特征参量受热老化时间及测试温度影响较大；在应用时域介电响应技术评估变压器油纸绝缘状态时，必须考虑测试温度的影响，否则将导致评估结果失实；通过本文方法绘制的电流标准主曲线不仅能消除测试温度对时域介电特性的影响，还能实现在不额外延长实际测试时间的前提下，获得更多反映油纸绝缘状态的时域介电响应信息，并通过实验验证该方法的有效性。
위연구열노화시간급측시온도대유지절연시역개전특성적영향，이급경호지응용시역개전향응기술평고변압기유지절연노화상태，수선진행료불동열노화시간급불동측시온도하유지절연요조모형적겁화/거겁화전류(polarization and depolarization current，PDC)측시，연후통과확전Debye모형실현시역개전측시기술간전환，심입연구료열노화시간급측시온도대시역개전특성급기특정삼량적영향，최후제출운용시간급폭치평이인자구조전류표준주곡선이소제측시온도대시역개전특성영향적방법。결과표명：유지절연시역개전특성급특정삼량수열노화시간급측시온도영향교대；재응용시역개전향응기술평고변압기유지절연상태시，필수고필측시온도적영향，부칙장도치평고결과실실；통과본문방법회제적전류표준주곡선불부능소제측시온도대시역개전특성적영향，환능실현재불액외연장실제측시시간적전제하，획득경다반영유지절연상태적시역개전향응신식，병통과실험험증해방법적유효성。
In order to better apply time-domain dielectric response technique in non-destructive diagnosis of transformer’s aging state, the influences of thermal aging time and testing temperature on time-domain dielectric property of oil-paper insulation was investigated. Firstly, the experiment of oil-paper insulation winding model in different thermal aging time and different testing temperatures were carried out. After then, the integration of time-domain dielectric measurement technique was implemented by extended Debye model and the influence of thermal aging time and testing temperature on time-domain dielectric behavior and its characteristic parameters were intensively studied. Finally, a new method of structuring current standard master curve by using time and amplitude panning factor was proposed to eliminate the impact of testing temperature. It demonstrates that the time-domain dielectric property of oil-paper insulation and its characteristic parameters was significantly influenced by thermal aging time and testing temperature. Testing temperature must be taken into account in the application of time-domain dielectric response to assess the condition of oil-paper insulation. Otherwise it would lead to the untrue assessment result. Using the current standard master curve could not only eliminate the impact of testing temperature but also acquire more time-domain dielectric information in reflecting the status of oil-paper insulation without additional test time, and then validity of this method was verified via experiment.