Preparation and performance characterization of ultra high strength prestressed steel core for overhead conductor
ZHU Zhi-xiang1, CHEN Bao-an1, DANG Peng2, YANG Chang-long3, ZHENG Yang3, DUO Jun-long3
1. State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China; 2. Shanghai Electrical Cable Research Institute Co., Ltd., Shanghai 200093, China; 3. Shenyang Power Supply Company of State Grid Liaoning Electric Power Co., Ltd., Shenyang 110811, Liaoning, China
Abstract：As the gradual construction of new power system with new energy as the main body, how to improve the high-capacity, safe and efficient transmission capacity of overhead transmission lines is becoming a hot topic for the power industry. Based on the high carbon steel wire rod with optimized composition and the appropriate processing technology, an ultra-high strength prestressed steel wire with zinc-aluminum alloy coatings was prepared, whose tensile strength was more than 2 100 MPa, elongation was no less than 4.8%, the zinc aluminum alloy coating weight was more than 320 g/m2, and the 1 000 h stress relaxation rate of stranded prestressed steel core was 4.178%. On this basis, the design and development of supper-strong and high conductivity prestressed steel core soft aluminum conductor was designed and developed, which provided technical support for the localization development and application of the new compatibilization conductor.
Tomas Prosek, Dan Persson, Jan Stoulil, et al. Composition of corrosion products formed on Zn-Mg, Zn-Al and Zn-Al-Mg coatings in model atomspheric conditions[J]. Corrosion Science, 2014, 86:231.
2022, Vol. 32 
