Substation equipment assurance

DNV creates basic designs and specifications and executes feasibility studies for high voltage substations, provides independent assessment of substation equipment condition and future lifetime, and supports QA/QC reviews through commissioning.

Clear design studies and tender documents are increasingly important as more suppliers tender for substation projects; technical documentation must enable transparent decision-making and solution clarity. Substation equipment is a major capital investment; condition and remaining life assessment enables effective O&M and replacement strategies while controlling risk, costs and quality—often requiring independent reporting and recommendations.

About DNV’s substation equipment services

DNV supports substation design/specification and feasibility studies, provides independent condition and lifetime assessment, and offers QA/QC reviews and delivery oversight across design-to-commissioning.

• Advisory: Providing end-to-end technical advisory for substations and HV installations, including feasibility studies with technical and economic analysis, conceptual design and solution ranking, definition of design basis and basic design for tendering, and detailed specification of key components such as switches, transformers, breakers, rectifiers, and insulators to ensure robust and optimized project delivery.
• Diagnostics: Providing independent condition and lifetime assessments to support optimized O&M and replacement strategies, combining desktop data analysis with advanced diagnostics such as condition scans, partial discharge detection, infrared thermography, and oil analysis across transformers, switchgear, cables, and terminations, complemented by lifetime modelling and health & risk index approaches to deliver actionable insights and asset management dashboards.
• Verification: Delivering independent QA/QC and design verification across the full project lifecycle—from specification review, tendering and bid evaluation to detailed design review—combined with oversight of manufacturing, installation, and commissioning to ensure compliance with technical requirements, and complemented by owner’s or lender’s engineer services providing structured reporting on progress, deviations, and overall project performance.

Transparent, decision-ready technical documentation for tendering and procurement.

Independent condition and remaining life insights plus recommendations to support substantiated operational and business decisions.

QA/QC evidence and recommendations supporting risk-based acceptability decisions.

Why DNV

DNV combines practical global experience in air- and gas-insulated HV substation and installation design—supporting feasibility, conceptual, and basic design for tendering—with independent condition and lifetime assessment capabilities using an integrated, system-to-component methodology, and impartial QA/QC across all project phases, from conceptual design through commissioning, to ensure technical requirements are consistently met and asset performance is optimized.