Formulation of advanced design standards for HV/MV Substations to optimize and utilize renewable resources in construction, operation and maintenance: Technical challenges and lessons learned

This challenge faces significant barriers because, in the specific case of Colombia, most of the energy resources are located in areas with complex topographies, far from urban centers. These conditions make the transportation of materials difficult, increase execution times, and raise the construction cost. Considering these restrictions, and based on the lessons learned from previous projects, this work presents an integral methodology for the standardization of substation design focused on resource optimization, using modularity criteria with a sustainability approach. Based on the above, a proposal was implemented that would allow changing the conventional construction methods; usually based on reinforced-concrete beams and columns, masonry, and deep excavations into a more flexible system. Through pilot projects, the use of modular buildings for control rooms and switchgear rooms was validated, manufactured with “steel deck” structures, sandwich-type panels, and metallic frameworks.

A key innovation is the use of elevated platforms that remove the need to build semibasements for power and control cable routing, considerably reducing excavations volumes and earthworks. Additionally, the design incorporates self-supported roofs with fast assembly, which allow covering large areas in reduced times. From an operational perspective, this modular approach facilitates future expansions (scalability) without requiring complex demolitions that could put service continuity at risk. An issue that is common in conventional substations.

The idea initially considers the creation of a standardization process for design, gathering new applications, technologies, construction ideas, and operational improvements that can optimize resource use, allow faster and more efficient construction, and most importantly, enable the growth of projects in a more organized way. Finally, it was observed that the water produced by A/C condensation generated a continuous flow. Through a collection, storage, and distribution system, this water could be integrated into a circular-economy scheme, allowing its reuse to supply sanitary and cleaning services, ensuring a sustainable and continuous flow throughout the whole operation of the substation.

In conclusion, the standardization applied to substation designs seeks to optimize investment and operational expenses, aligned with regulatory models, enabling a faster, more efficient, and environmentally friendly infrastructure development. One that is algo sustainable over time.