Abstract: This paper adopts typical towers of ‌double-circuit transmission lines on same tower‌ in Zhejiang Province for case studies. Based on ‌PSCAD/EMTDC simulation‌, a detailed ‌double-circuit line model‌ was established to investigate ‌induced voltage and induced current‌ between circuits. Simulation results reveal ‌characteristic patterns‌ of induced electromagnetic parameters corresponding to various ‌tower configurations‌, providing critical references for ‌grounding switch parameter selection‌ in line construction projects.