Compact electric switching substation into a lattice tower for connection of active and passive users to a high-voltage electric grid and use of said substation for connecting an electric vehicle charging station to a high-voltage electric grid

A lattice tower (40) for a high-voltage overhead transmission line (60, 90), the lattice tower (40) having a lattice structure comprising:

• a base (41) anchored to a ground;
• a top portion (43) designed for anchoring first conductors (51) and second conductors (52) of the high-voltage overhead transmission line;
• and
• a body (42) which extends between the base (41) and the top portion (43);
• wherein
• a lattice tower comprises a grid high-voltage electric switching substation that includes:
• GIS-technology-based switchgear equipment (401);
• a first loop-in loop-out feeder connection (402) that is configured to connect the first conductors (51) of the high-voltage overhead transmission line to the GIS-technology-based switchgear equipment (401), and made by insulated cables or GIS-technology-based ducts, or by mixed solutions wherein a first portion is made by bare conductors and a second portion is made by the insulated cables or the GIS-technology-based ducts;
• a second loop-in loop-out feeder connection (403) that is configured to connect the second conductors (52) of the high-voltage overhead transmission line to the GIS-technology-based switchgear equipment (401), and made by insulated cables or GIS-technology-based ducts, or by mixed solutions wherein a first portion is made by bare conductors and a second portion is made by the insulated cables or the GIS-technology-based ducts;
• and
• a protection, command and control system (405) arranged within the lattice structure (40), or in proximity to the base (41) of said lattice structure;
• wherein the GIS-technology-based switchgear equipment (401) is designed to be connected also to a user connection line (407);
• characterized in that the GIS-technology-based switchgear equipment (401) is arranged within the base (41) of the lattice structure.