Sun Zeming, Shi Minxia
China Airport Planning & Design Institute Co., Ltd., Northwest Branch, Xi'an 710075, China.
Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China.
Materials (Basel). 2024 Dec 9;17(23):6010. doi: 10.3390/ma17236010.
The power transformer is one of the most important parts of a power system. The transformer oil in a transformer not only increases its insulation strength, but also helps its cooling. Cellulose particles are one of the main factors affecting the breakdown characteristics of transformer oil, and the withstand voltage test can effectively detect the quality of transformer oil. Therefore, the withstand voltage test on transformer oil with different cellulose particle content levels in the laboratory can determine the breakdown characteristics of transformer oil and the method of improving the insulation strength of power transformers. However, there is lack of a set of effective preparation and test methods of transformer oil for laboratory use in the industry. Based on national standards and engineering practice, this paper puts forward a method of preparing transformer oil with different cellulose particle content levels in the laboratory and a method of the withstand voltage test on transformer oil in the laboratory, which can improve the efficiency and the scientificity of such experiments.
电力变压器是电力系统中最重要的部件之一。变压器中的变压器油不仅能提高其绝缘强度，还有助于其冷却。纤维素颗粒是影响变压器油击穿特性的主要因素之一，而耐压试验能有效检测变压器油的质量。因此，在实验室对不同纤维素颗粒含量水平的变压器油进行耐压试验，可以确定变压器油的击穿特性以及提高电力变压器绝缘强度的方法。然而，行业内缺乏一套有效的实验室用变压器油制备及试验方法。基于国家标准和工程实践，本文提出了一种在实验室制备不同纤维素颗粒含量水平变压器油的方法以及实验室变压器油耐压试验方法，可提高此类试验的效率和科学性。
