Development of material formula and structure property indicators for low cold-resistant characterization of Cables' Material

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Sun, W.^1 ; Cai, Y.G.^2 ; Feng, Y.M.^2 ; Li, Y.L.^3 ; Zhou, H.Y.^1 ; Zhou, Y.^1

Electric Power Research Institute of State Grid Heilongjiang Electric Power Company Limited, Harbin

150030, China^1

State Grid Heilongjiang Electric Power Company Limited, Harbin

150090, China^2

State Grid Heilongjiang Electric Power Equipment and Materials Company, Harbin

150000, China^3

关键词: Embrittlement temperatures;    Low temperature environment;    Physical and mechanical properties;    Production requirements;    Production technology;    Property requirements;    Standard requirements;    Structure property;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012066/pdf
DOI  :  10.1088/1757-899X/292/1/012066

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Alpine regions account for about 27.9% of total land area in China. Northeast China, Inner Mongolia, Northwest China and other regions are located in alpine regions, wherein the above regions are rich in energy. However, the low-temperature impact embrittlement temperature of traditional PVC cable materials is between-15°C and-20°C, which is far lower than actual operation requirements. Cable insulation and sheath are always damaged during cable laying in alpine regions. Therefore, it is urgent to develop low-temperature-resistant cables applicable to low-temperature environment in alpine regions, and safe and stable operation of power grids in the alpine regions can be guaranteed. In the paper, cold-resistant PVC formula systems were mainly trial-manufactured and studied. Appropriate production technologies and formulas were determined through selecting raw materials and modified materials. The low-temperature impact embrittlement temperature was adjusted below-50°C under the precondition that PVC cable materials met national standard property requirements. Cold-resistant PVC cable materials were prepared, which were characterized by excellent physical and mechanical properties, and sound extrusion process, and cold-resistant PVC cable materials can meet production requirements of low-temperature-resistant cables. Meanwhile, the prepared cold-resistant cable material was used for extruding finished product cables and trial-manufacturing sample cables. Type tests of low temperature elongation ratio, 15min withstand voltage, etc. were completed for 35kV and lower sample cables in Mohe Low-temperature Test Site. All properties were consistent with standard requirements.