Addressing audible noise challenges in the integration of the 6 x IEC 315 conductor on South Africa’s 765 kV transmission network

South Africa’s 765 kV transmission lines are a critical component of the national electricity network, enabling long-distance power transfer and supporting grid reliability. These highcapacity transmission corridors facilitate efficient distribution of electricity from generation sources to load centers, ensuring the power system operates safely and reliably. The primary objective of this study is to evaluate the technical performance, design implications, and costeffectiveness of using the smaller-diameter IEC 315 (23.90 mm) ACSR conductor compared with the historically used Tern (27.00 mm) ACSR conductor on South Africa’s 765 kV transmission line, with particular focus on audible-noise performance.