• Corona and high-voltage discharge phenomena were investigated and measured across large HV networks, emphasizing corona losses, radiative influence, and protective considerations under extreme voltages [2], [7], [10], [16], [18].

• System-level hardware design and evaluation for Tidd HV test lines, covering insulators, line hardware, conductors, transformers, arresters, and switchgear to assess reliability and safety [3], [4], [5], [6].

• Approaches to line design and performance under direct lightning events, switching transients, and charging interruptions; emphasis on line responses to high-voltage transients [10], [11], [13].

• Emergence of microstrip-based transmission concepts for power electronics, enabling compact transmission lines and high-frequency signaling for electric power systems [14], [15].

• Economic aspects of HV transmission and material choices, including series capacitors, high-voltage insulation, and large-scale system deployment [1], [8], [9], [17].