The Research Of ACCC’s Aging At Low Temperature And Ice Overloading And Its Application Technology

Compared with the Aluminum Conductor Steel Reinforced (ACSR) in the samestandard,Aluminum Conductor Composite Carbon(ACCC) has the following advantages:light weight, high tensile strength, big current-carrying capacity, high temperatureresistance, corrosion resistance, small linear expansion coefficient etc. it has become themost promising new leads species. Many researchers have done a lot of work of ACCC，soperation features at high temperature and it，s aging of high and low temperature,saltspray, UV,but nobady research ACCC，s aging at low temperature and ice overloading andit，s application technology,we do this work.The paper introduced the principle of calculating sag and stress of overhead lines,wrote the software to calculate the sag and stress of overhead lines, and calculated thesag and stress of the same specifications of the carbon fiber composite core wire and steelcore aluminum stranded wire in different ice thickness and different span. By means ofthe contrast, we found that the ACCC has more excellent stress and sagcharacteristics—in the same ice thickness and temperature, it，s sag was smaller and itwas able to withstand greater ice load.We developed a set of aging equipment that meet the needs of test requirements，mainly including aging boxes, constant tension tensile machine and power frequencytransformer, simulated ACCC,s operating environment at low temperature(-20℃) anddifferent ice overloading(10mm、20mm and30mm), experiment were carried out720h.Experimental results show that it has no obvious decline in performance.At the same time, the paper researched the ice-shedding characteristic of ACCC, arelease-control system and a data acquisition system were designed, by changing icethickness, ice-shedding,s number and location, simulated ACCC,s jumping behavior in avariety of ice-shedding conditions, collected and analyzed the data of ACCC,s jumpingheight. Experimental results show that when the whole ice shed from ACCC, the greaterthe thickness of the ice,the higher the ACCC jumped;when the ice-shedding was uniform,the larger the mass of ice shedding, the higher the ACCC jumped; when theice-shedding was uneven,and the mass was the same,the closer to the midpoint, thehigher the ACCC jumped.