CAJ | 학술논문

对2006-2007年、2007-2008年冬季甘肃、陕西、宁夏多个测点不同线径、不同架线高度电线积冰观测资料分析可知,不同线径电线积冰的净直径、净厚度、等效厚度、积冰重量间存在显著线性关系.直径为26mm导线电线积冰重量约为18mm导线的1.2倍,是4mm铁丝的1.3倍.直径为26mm导线与直径为18mm导线电线积冰间的各项关系都较26mm导线与4 mm铁丝的线性关系更为显著;大直径导线电线积冰的净直径、净厚度、等效厚度均小于4 mm铁丝;26 mm导线与18 mm导线电线积冰的净直径、等效厚度基本相等.电线积冰等效厚度是架设高度比的幂函数;忽略水滴下沉速度,在假定捕获系数为常数、假定时间各物理量均衡不变情况下,电线积冰重量与电线导线线径成正比,且随架设高度的增加而增加.
대2006-2007년、2007-2008년동계감숙、협서、저하다개측점불동선경、불동가선고도전선적빙관측자료분석가지,불동선경전선적빙적정직경、정후도、등효후도、적빙중량간존재현저선성관계.직경위26mm도선전선적빙중량약위18mm도선적1.2배,시4mm철사적1.3배.직경위26mm도선여직경위18mm도선전선적빙간적각항관계도교26mm도선여4 mm철사적선성관계경위현저;대직경도선전선적빙적정직경、정후도、등효후도균소우4 mm철사;26 mm도선여18 mm도선전선적빙적정직경、등효후도기본상등.전선적빙등효후도시가설고도비적멱함수;홀략수적하침속도,재가정포획계수위상수、가정시간각물리량균형불변정황하,전선적빙중량여전선도선선경성정비,차수가설고도적증가이증가.
Based on the characteristic of the wire icing data of different diameters,different heights observed from Gansu,Shaanxi and Ningxia,the concept of net diameter,net thickness are brought forward.The relations between net diameters,net thicknesses,average thickness and mass of wire icing of different di-ameters at different heights are studied,and the regularities are analyzed.It provides reference for the cal-culation of the standard thickness of wire icing on power line between Gansu and Shaanxi.The results show that there are remarkable linear relations between net diameter,net thickness,average thickness and masses of wire icing.The mass,net diameter,average thickness,and net thickness of 26 mm conductor respectively are 1.3,0.72,0.65 and 0.4 times big as those of 4 mm wire,and are 1.2,1.037,1 and 0.8882 times big as those of 18 mm conductor.The linear relations between 26 mm conductor and 18 mm conductor are more obvious than the relations between 26 mm conductor and 4 mm wire.The net diame-ters,net thickness and average thicknesses of ice accretion on the 26 mm conductor respectively are smaller than that of 4 mm wire.The average power exponent of average thickness of ice accretion with height is 0.40.The power exponent is 0.45 at the heights of 10 m to 5 m,0.35 at the heights of 5 m to 2 m,0.38 at the heights of 10 m to 2 m.By neglecting the sinking speed of water droplets,assuming that capture coefficient is a constant,and assuming various physical quantities are equilibrium constant,the weight of wire icing is proportional to conductor diameter,and increases with the height of conductor.In the experiment,the order of ice accretion mass from small to big is 2 m high 18 mm conductor,2 m high 26 mm conductor,5 m high 18 mm conductor,5 m high 26 mm conductor,10 m high 18 mm conductor,10 m high 26 mm conductor.