Due to the low transmission capacity margin of overhead conductors of ACSR type in the existing grid structure, the large-scale grid connection of new energy is greatly limited. However, 60% of IACS heat-resistant conductors have low conductivity and high power loss in the transmission process. Therefore, 61.5% of IACS heat-resistant aluminum alloy conductors with high conductivity are developed for line capacity expansion and reconstruction. The feasibility of 61.5% IACS high conductivity heat-resistant aluminum alloy stranded conductor is analyzed in combination with the example of urban power line capacity expansion and transformation. Under the condition that the call height margin of the original line tower is sufficient, the use of this type of conductor can achieve obvious energy saving effect and effectively improve the transmission capacity and energy utilization rate of the line have been increased. Under the condition that the sag of the conductor and the bearing capacity of the tower do not increase compared with the original line, the capacity of the original line can be increased by at least 1.4 times by using this type of conductor. At the same time, because the conductor uses aluminum clad steel core as the reinforcing core, the corrosion resistance of the conductor is effectively improved to ensure the overhead transmission in coastal areas or heavily polluted areas safe operation reliability of electric lines.

Lv Zhonghua, Liu Bing, Zhang Ruyu, Chen Youhui, Pan Qi, Hu Ruixue. Study on optimization of heat-resistant conductor in line capacity expansion. Academic Journal of Materials & Chemistry (2023) Vol. 4, Issue 1: 25-30. https://doi.org/10.25236/AJMC.2023.040105.

[1] Xue Tianshui. Comparative study on ultra long distance transmission modes[D]. Shanghai: Shanghai Offshore Electric Power Institute, 2015

[2] Zhu Zhixiang, Han Yu, Chen Xin, et al. High conductivity heat-resistant aluminum for overhead lines Development of alloy conductor[J]. China Electric Power, 2014, 47 (6): 66 － 69

[3] Li Jing, Yang Sheng, Cai Bin, et al Microstructure and properties [J]. Metal heat treatment, 2015, 40 (11): 25-28

[4] Wan Jiancheng, Xi Yongping, Liu Long, et al. New energy-saving conductor resistance temperature system Experimental study of the number[J]. China Electric Power, 2014, 47 (6): 70-74

[5] Qi Donghui. Research on energy-saving application of high-temperature heat-resistant conductor [D]. State: South China University of Technology, 2012

[6] Zhang Yinglu. Calculation of tension sag characteristics of double capacity conductor [J]. Power Construction, 2006, 27 (9): 7-8

[7] Gu Junjie, Yuan Qi, Ge Qingtian. Technical characteristics and application of aluminum clad invar steel core heat-resistant conductor[J]. Electricity and Energy, 2014, 35 (5): 594-596

[8] Dong Gang. Research on the properties of aluminum coated carbon fiber composite core conductor [J]. Shandong Electric Power Technology,2017: 44(11)65-68

[9] You Chuanyong. Research on the application of capacity increasing conductor on overhead transmission lines[J]. Electric power equipment B, 2006, 7 (10): 1-7