Researchers have developed a cable-supported photovoltaic structure (CSPS) for solar projects on challenging terrain, overcoming limitations of traditional ground-mounted PV structures. Inspired by bridge aerodynamics, the system splits a single cable truss into two parallel trusses to enhance torsional load-resisting mechanism. Key design parameters include cable sags, truss height, and cable pretensions, influencing structural behavior and stiffness. The system configuration improves torsional mode frequency and critical flutter wind speed, with added components like purlins and braces enhancing stiffness and vibration control. The study validated the proposed two-parallel cable truss system as a structurally efficient and aerodynamically robust solution for large-span CSPS designs in high-wind environments, providing a practical design framework for future large-scale solar infrastructure in challenging terrain environments.