Abstract: The present invention discloses a maleic anhydride modified voltage stabilizer, a preparation method, and use thereof, which belongs to the technical field of high voltage and insulation. The present invention discloses a maleic anhydride modified voltage stabilizer represented by Formula 1 and a preparation method thereof. (1) Maleic anhydride and 2,4-dihydroxybenzophenone are dissolved in tetrahydrofuran to obtain a mixture. (2) In a protective gas atmosphere, the mixture obtained in step (1) is added with a catalyst and stirred, centrifuged with added water, and an obtained precipitate is dried, thereby achieving the maleic anhydride modified voltage stabilizer. The present invention also provides the use of the maleic anhydride modified voltage stabilizer in a cross-linked polyethylene high voltage AC cable insulating material.

Abstract: A method for predicting reliability of a cross-linked polyethylene cable insulation material, including: subjecting cross-linkable materials respectively to cross-linking reactions, to obtain groups of cross-linked polyethylene and enthalpy values of exothermic peaks of cross-linking reactions of the groups of cross-linkable materials; subjecting the groups of cross-linked polyethylene to a thermal extension test to obtain elongations under load of the groups of cross-linked polyethylene; establishing a curve for predicting reliability of the cross-linked polyethylene cable insulation material based on enthalpy values of the exothermic peaks of cross-linking reactions of the groups of cross-linkable materials and the elongations under load of the groups of cross-linked polyethylene; subjecting a cross-linkable material to be predicted to a cross-linking reaction, thereby obtaining an enthalpy value of an exothermic peak of the cross-linking reaction of the cross-linkable material to be predicted; and comparin

Abstract: A method for evaluating a degassing effect of a cross-linked polyethylene cable, includes: acquiring a cable sample to be detected; heating the cable sample to be detected; under a darkroom condition, acquiring at least one light spot image of said transparent cable sample under irradiation of a monochromatic laser light source; extracting light intensity data of the at least one light spot image in a preset light spot image range; normalizing the light intensity data, and obtaining the maximum value and an average value of normalized light intensity coefficients of said transparent cable sample in a preset thickness range of the insulating layer; calculating a degassing uniformity coefficient according to the maximum value and the average value; and obtaining an evaluation result of the degassing effect of the cross-linked polyethylene cable according to the maximum value, the average value, and the degassing uniformity coefficient.

Abstract: The present application relates to a composite resin-based semi-conductive shielding material, prepared from raw materials including following components: 55 to 65 parts by mass of a composite resin, 20 to 30 parts by mass of electrically conductive fillers, and 0.9 to 2 parts by mass of a cross-linking agent, wherein the composite resin is a composite of a low-density polyethylene resin and an ethylene-acrylic acid resin, and the ethylene-acrylic acid resin is at least one of an ethylene-ethyl acrylate resin or an ethylene-butyl acrylate resin.

Abstract: The present invention provides a polypropylene cable protective layer and a preparation method thereof. The polypropylene cable protective layer sequentially includes a dielectric layer, a buffer layer and an insulating layer from the inside to the outside, and the thickness of the dielectric layer accounts for 5%˜12% of the thickness of the polypropylene cable protective layer; the thickness of the buffer layer accounts for 17%˜25% of the thickness of the polypropylene cable protective layer; the dielectric layer, the buffer layer and the insulating layer are respectively obtained by the wrapping of a polypropylene film A, a polypropylene film B and a polypropylene film C. The polypropylene cable protective layer of the present invention forms a dielectric gradient, and realizes the improvement of the insulation strength and voltage level of the power cable, and the increase of the transmission capability.

Abstract: The present invention provides a polypropylene cable protective layer and a preparation method thereof. The polypropylene cable protective layer sequentially includes a dielectric layer, a buffer layer and an insulating layer from the inside to the outside, and the thickness of the dielectric layer accounts for 5%˜12% of the thickness of the polypropylene cable protective layer; the thickness of the buffer layer accounts for 17%˜25% of the thickness of the polypropylene cable protective layer; the dielectric layer, the buffer layer and the insulating layer are respectively obtained by the wrapping of a polypropylene film A, a polypropylene film B and a polypropylene film C. The polypropylene cable protective layer of the present invention forms a dielectric gradient, and realizes the improvement of the insulation strength and voltage level of the power cable, and the increase of the transmission capability.

Abstract: The present disclosure relates to the field of high-voltage AC cable insulation technologies, and provides a method for predicting insulation aging life of a high-voltage submarine cable and a device. The method includes: obtaining environmental data and cable breakdown time of a cable sample; the environmental data including an electric field, temperature, and mechanical stress applied to the cable sample by an environment; calculating characteristic breakdown time corresponding to the cable sample by Weibull distribution based on the cable breakdown time of the cable sample; determining an insulation aging life prediction model of the high-voltage submarine cable based on the environmental data and the characteristic breakdown time of the cable sample; obtaining environmental data of a cable to be predicted in an actual application environment, and calculating insulation aging life of the cable to be predicted by using the prediction model.