1. Why has the standard for natural esters (plant) insulating oils for transformers been issued recently?
As we all know, compared with the traditional mineral oil transformer, the natural ester transformer because of the use of renewable, degradable, non-flammable natural ester insulation oil, therefore has the characteristics of green environmental protection, high fire performance, in foreign countries has more than 20 years of application, there are a small number of domestic applications. Due to the difference between the performance of natural ester insulating oil and mineral insulating oil, the existing mineral oil standard is not fully applicable to the natural ester insulating oil, and there is no domestic standard to follow, leading to the absence of standard provisions on the performance requirements, acceptance and application of natural ester insulating oil. Therefore, it is urgent to formulate relevant standards according to the characteristics of natural esters, so as to regulate the application of natural esters insulating oil. Since 2014, led by the China institute of electrical technology, and in cooperation with more than 10 domestic companies, the formulation of the standard "DL/T 1811-2018 guidelines for the selection of natural insulating oil for power transformers" for the power industry has been carried out. The standard was officially implemented on July 1, 2018.
2. Does the release of the natural ester insulating oil standard mean that it is of great help to the user market?
Electric power industry standard DL/T 1811 mainly on the natural resin insulating oil resistance make clear a regulation, the site acceptance of natural ester insulating oil, grease, oil filter, the maintenance process, safety and environmental aspects of the regulation, the standard for natural ester insulating oil production, the choose and buy, the application provides a standard basis, such as to fill the domestic blank.
3. In addition to the natural ester insulating oil standard, what is the status of the relevant standards for the natural ester transformer?
It is not enough to make the standard of natural ester insulating oil, but the application of natural ester insulating oil to transformers is the ultimate goal. Therefore, it is extremely urgent to make the standard of natural ester transformer to promote the application of natural ester transformer. Since 2016, we according to the differences in natural ester insulating oil and mineral insulating oil, according to the main characteristic of natural resin transformer, combined with the application of the domestic existing experience, in reference, on the basis of international standards, has formulated the "natural ester insulating oil transformer" mechanical industry standards (approval), the natural ester insulating oil power transformer selection > electric power industry standard and the standard of natural resin transformer series group.