Modified high-ignition-point transformer oil and preparation method thereof

Abstract

The invention discloses modified high-ignition-point transformer oil and a preparation method thereof. The modified high-ignition-point transformer oil is mainly composed of mineral insulating oil, amodified nano magnesium hydroxide / nano aluminum hydroxide composite flame retardant and cresyl diphenyl phosphate, wherein the modified nano magnesium hydroxide / nano aluminum hydroxide composite flameretardant is mainly prepared by modifying nano magnesium hydroxide and nano aluminum hydroxide with oleic acid. The preparation method comprises the following steps: (1) preparing the modified nano magnesium hydroxide / nano aluminum hydroxide composite flame retardant; (2) adding the composite flame retardant; and (3) adding the cresyl diphenyl phosphate. The modified high-ignition-point transformer oil disclosed by the invention has the characteristics of excellent heat dissipation performance and insulating performance of mineral insulating oil, low price and the like; the low-ignition-pointmineral insulating oil has the characteristics of high flame retardancy and high fire resistance, can replace the original conventional low-ignition-point mineral insulating oil without changing theexisting transformer, can be widely applied and popularized, and has important practical significance and commercial value.

Description

technical field [0001] The invention belongs to the technical field of insulating oil, and relates to a modified high ignition point transformer oil and a preparation method thereof, in particular to a nano flame retardant modified high ignition point transformer oil and a preparation method thereof. Background technique [0002] At present, transformers are basically oil-immersed transformers, and the most widely used transformer oil is mineral insulating oil, because mineral insulating oil has excellent electrical insulation, cooling performance and low cost. However, due to the low ignition point of mineral insulating oil, the transformer is prone to fire when a serious fault occurs, and the probability of fire is 5% to 15%. Therefore, there is an urgent need to develop high ignition point transformer oil to solve the above problems. [0003] In order to solve the above problems, some scholars have successively developed polychlorinated biphenyl (PCB)-based insulating oi...

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Problems solved by technology

[0003] In order to solve the above problems, some scholars have successively developed polychlorinated biphenyl (PCB)-based insulating oil, silicone oil, synthetic ester (pentaerythritol ester), alpha oil, beta oil, polyalphaolefin, HMWH oil (polymer carbon Hydrogenated oil), vegetable insulating oil and other non-flammable or non-fuel products, but because these insulating oils either cannot meet the requirements of cooling performance, insulation performance and oxidation resistance, etc., or are high in cost, and need to be used at present. Transformation of mineral insulating oil transformers, otherwise there is a great risk, so it is impossible to form a wide range of applications