Daniele Casale, Senior Consultant at JUMBO Consulting Group, shares his insights on how transmission scopes are evolving as offshore wind projects scale into multi‑GW clusters. He highlights the growing importance of HVDC, the competencies project teams must develop, and the lessons that can be applied across emerging energy sectors.
As offshore wind projects scale into multi-GW clusters with HVDC becoming the default, how are transmission scopes changing from a project management perspective, and what new competencies do teams need to develop?
As offshore wind scales, transmission scopes are shifting from discrete project packages to system-of-systems delivery. Projects now involve HVDC hubs, multiple converters, shared corridors, and coordination with onshore grid upgrades that often sit with TSOs, outside the developer’s direct control.
From a project-management perspective, this introduces longer development timelines, more parallel critical paths, and increased exposure to third-party interfaces. Teams need new competencies in HVDC systems integration, interface management, early supply-chain engagement, regulatory navigation, and Joint Ventures/consortium management.
At scale, transmission is no longer a project component but a strategic system enabler. HVDC shifts delivery risk into early development, market engagement, and system design availability.
Organisations must move from single contractor product/component to owner-led system governance. This requires in-house system authority, enterprise interface control, market intelligence, and leadership fluent decision making across engineering, regulation, and capital strategy.
You’ve worked extensively with complex interface boundaries — especially between export cables, offshore substations, and grid connection assets. What are the most common interface risks you see today?
Common interface risks occur between export cables, offshore substations, and grid assets. These include late alignment of technical assumptions, contractual gaps in system accountability, potential schedule misalignments between offshore and onshore works, and inconsistent commissioning scopes.
Mitigation requires early definition of system integration responsibility, locking technical parameters before procurement, assigning single-point accountability for tightly coupled assets, and joint interface and commissioning planning. The most critical risks often sit between contracts rather than within them.
Supply chain constraints for HVDC equipment, cables, and installation vessels are now one of the biggest bottlenecks in offshore wind. From your experience, what practical steps can project managers take early on to secure capacity and maintain schedule certainty?
HVDC equipment, cables, and vessels represent one of the biggest bottlenecks. Practical steps include early supplier engagement, reserving manufacturing and vessel slots, building schedules around supplier constraints (both manufacturing and installation), designing technical flexibility, and aligning FID timing to secure capacity.
HVDC supply chain constraints are a strategic limit on growth. It is therefore paramount to assess and balance supplier capabilities, commercial evaluations and proper risk management from the early phase. Clients must treat manufacturing capacity as scarce capital, engage suppliers as partners, secure optionality through early commitments, and prioritise schedule certainty over marginal cost optimisation. Overall portfolio planning and standardisation are key enablers of resilience.
You’ve delivered transmission scopes across different markets and regulatory environments. What are the most important lessons that can be transferred to emerging sectors like CCUS, BESS, and hybrid offshore energy systems?
Key lessons include the primacy of interface management, early regulatory alignment, the value of standardisation, and the importance of digital design and configuration control. These lessons apply directly to CCUS, BESS, and hybrid offshore systems, as much as HV interconnector projects. System integration is the primary value driver, regulatory and infrastructure dependencies define risk, and standardisation outperforms bespoke optimisation. Companies that apply these lessons early will outperform peers on cost, schedule, and investor confidence.
How are digital tools, data, and systems engineering changing the way transmission scopes are planned and delivered?
Transmission scopes are becoming larger, more integrated, and increasingly HVDC-centric. They are multi-terminal, multi-use, and control-system driven, requiring a more holistic system integration. Transmission assets are evolving into long-life, software-intensive systems. Leadership focus must extend beyond CAPEX delivery to lifecycle sustainability, interoperability, and future optionality.
Digital tools, data, and systems engineering are transforming how transmission scopes (the planning, design, construction, and operation of transmission infrastructure) are planned and delivered. These technologies improve efficiency, accuracy, collaboration, risk management, and long-term performance.
Data-Driven Decision Making: large volumes of data—geospatial, environmental, sensor, asset performance, and market data—are now collected and processed throughout the lifecycle of transmission projects.
- Advanced analytics and AI help planners identify optimal routes, anticipate future demand, and assess economic and reliability impacts.
- Predictive modelling uncovers patterns that humans might miss, improving decisions such as where to strengthen grid capacity or invest in upgrades.
- Real-time and historical data monitoring supports dynamic planning, rather than static, once-a-year planning cycles.
Positive impact is based on more informed decisions with better visibility on future risks and opportunities. Systems engineering also applies structured methods to manage complex interdependencies between technical and operational elements.
- Requirements modelling connects customer needs (e.g., reliability, capacity) with engineering specifications across disciplines.
- Digital twins and simulations model grid behaviour under different conditions (e.g., load growth, outages, renewable integration).
The above considerations provide higher confidence in system performance, better risk mitigation, fewer unforeseen events during construction or operation
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Reach out to Daniele Casale and Martin Evans at JUMBO Consulting Group, to learn more about the offshore transmission service and how we support offshore transmission projects.