From Plans to Power Lines: Building Proactive and Robust Transmission Planning in LAC

Transmission lines don’t get built in spreadsheets. But without the right kind of spreadsheet—a credible, coherent planning process—most lines never leave the page.

The Inter-American Development Bank (IDB) makes this point strongly in its technical note “Unlocking the Grid: How to Ensure Reliable and Sustainable Energy in Latin America and the Caribbean.” Chapter 2, “From Vision to Action: Transmission Planning for a Resilient and Robust Power System,” argues that planning is now a strategic policy function, not a narrow engineering exercise. Strong planning frameworks will decide whether Latin America and the Caribbean (LAC) can build resilient, reliable, low-carbon power systems—or remain stuck with bottlenecks, stranded renewables and under-performing grids.

This second article in Dawgen Global’s “Unlocking the Grid” series dives into that planning agenda. It explores where current planning practices in LAC are falling short, the institutional and methodological reforms the IDB recommends, and how countries—especially in the Caribbean—can move from elegant plans to executable project pipelines.

1. Transmission Planning as a Strategic Vision Exercise

The IDB frames transmission planning as “a strategic vision exercise” rather than a purely technical workflow.

That shift of mindset is crucial. Effective planning must:

• Anticipate long-term demand and electrification trends, not just extrapolate historical growth.

• Reflect the region’s renewable resource geography—hydro basins, wind corridors, solar belts, and emerging green hydrogen clusters.

• Integrate climate and technological uncertainty, from hydrology changes to distributed resources and new loads (e-mobility, data centres).

• Connect power system development with industrial policy, regional integration and territorial planning.

In this vision, the planning document is not an annual box-ticking requirement; it becomes:

• A policy instrument that shapes investment flows and sector structure.

• A coordination platform among ministries, regulators, utilities, communities and financiers.

• A signal to markets about the direction, pace, and location of future infrastructure.

For Caribbean small island systems, planning has an additional nuance: it must balance redundancy and resilience (to hurricanes, storms, sea-level rise) with the economics of small scale and limited fiscal and technical capacity.

2. Where Planning Is Falling Short Today

IDB’s diagnostic of current transmission planning in LAC is candid: processes are often fragmented, deterministic, and poorly connected to execution.

The report organises the main obstacles into three groups: institutional, methodological and strategic barriers.

2.1 Institutional Barriers

Several institutional weaknesses undermine planning:

• Fragmented mandates – Key functions such as scenario design, project identification, technical evaluation, regulation, licensing and financing are spread across different entities with no permanent coordination structures. This leads to overlaps, gaps, and conflicts.

• Grid access chaos – Connection requests for new generation and major loads often far exceed the system’s capacity. Access is sometimes handled on a first-come, first-served basis, disconnected from expansion plans.

• Speculative requests – Many connection applications have limited technical or financial backing, clogging administrative processes and blurring priorities.

• Limited digitalisation – Connection and planning processes remain heavily manual in many countries, with fragmented databases and poor interoperability between agencies and system operators.

The result is a system in which planners, regulators and implementers are not reading from the same script.

2.2 Methodological Barriers

On the methodological side, planning in LAC typically suffers from:

• Old-school modelling – Many transmission plans are still based on deterministic load-flow analysis under peak conditions, with limited attention to dynamic behaviour, system resilience, and flexibility.

• Weak treatment of uncertainty – Simplified scenarios dominate. Extreme events, demand shocks, technology cost swings and policy shifts are not systematically explored.

• Narrow cost–benefit framing – Evaluations often neglect wider benefits: reduced curtailment, avoided fuel imports, regional integration, territorial development, social impacts, and long-term climate resilience.

• Limited view of technological options – Advanced technologies such as flexible AC transmission systems (FACTS), high-voltage DC (HVDC), dynamic line rating, or targeted conductor upgrades are not consistently incorporated as alternatives to new lines.

Also, there is often a disconnection between transmission and distribution planning. Future non-linear loads and distributed resources (EV charging, rooftop solar, batteries, heat pumps, data centres) are under-represented, leading to misjudged backbone needs.

2.3 Strategic Barriers

Even where plans are technically sound, they can fail strategically:

• No tactical roadmap – Plans may define a long-term vision but lack short- and medium-term operational roadmaps that guide concrete steps, responsibilities and deadlines.

• Territorial disconnect – Electrical plans are often weakly linked to land-use planning, making routing more contentious and time-consuming.

• Regional blind spots – National plans may not fully consider cross-border interconnections or regional power integration strategies, missing opportunities for shared reserves and optimisation.

Crucially, the IDB notes a mismatch between expansion plans and the institutional capacity to execute them. Many projects in official plans lack secured financing, clear prioritisation, or defined tender schedules; execution units face budget and staffing constraints. This leads to backlogs of unexecuted projects and repeated plan revisions, eroding credibility.

3. The Cost of Weak Planning: Time and Trust

Weak planning translates directly into time lost and trust eroded.

The IDB highlights how, in many LAC countries, the full process from preparing technical and environmental studies to obtaining licences and connecting a project can take four to six years on average, compared with under two years in some advanced systems such as the United Kingdom.

This delay arises from:

• Overloaded permitting and evaluation systems.

• Redundant steps and lack of standardisation.

• Unclear prioritisation of which projects move first.

• Limited data and digital tools to manage requests and track progress.

When combined with speculative access requests and fragmented responsibilities, this creates a queue of hundreds of projects stuck in limbo. Developers and investors face rising uncertainty; system operators struggle to align grid readiness with generation and demand growth; governments see delays in flagship energy and climate programmes.

Trust in the planning process itself is affected. If projects included in expansion plans routinely fail to materialise on schedule, stakeholders begin to treat planning documents as wish lists rather than credible roadmaps.

4. Principles of Modern Transmission Planning

The IDB’s planning agenda can be distilled into a few practical principles for LAC decision-makers.

4.1 Make Planning Institutional, Not Individual

Planning must be anchored in:

• Clear mandates for who leads, who contributes, and how coordination happens.

• Permanent coordination structures among energy, environment, finance, planning, regional integration bodies and regulators.

• Stable procedures that can withstand political cycles and staff turnover.

This institutionalisation reduces dependence on individual champions and builds continuity.

4.2 Plan for Uncertainty, Not a Single Future

Modern planning frameworks recognise that the future will not unfold along a single deterministic path. They:

• Develop multiple scenarios, including extreme but plausible events.

• Explore different mixes of renewables, demand growth, electrification speeds, and technology costs.

• Test network performance under stress conditions (e.g., extreme weather, infrastructure outages).

The goal is not to “predict” the future, but to prepare the system to perform under many futures.

4.3 Value System-Wide Benefits

Expansion options should be assessed with multi-criteria methodologies that explicitly incorporate:

• Technical indicators (losses, congestion, reliability).

• Economic impacts (fuel savings, avoided investments, competitiveness).

• Social and territorial aspects (impacts on communities, land use, regional development).

• Climate and resilience benefits (reduced vulnerability, faster recovery).

This wider lens often makes transmission projects appear more attractive than when judged only on narrow, short-term cost metrics.

4.4 Integrate Technological and Non-Wires Options

Planning should treat grid-enhancing technologies, storage, demand response and distributed resources as legitimate options, not afterthoughts:

• Consider GETs in the same decision tree as new lines and substations.

• Use digital twins and advanced models to compare “build bigger” vs “run smarter” solutions.

• Evaluate hybrid strategies that mix traditional and innovative approaches.

4.5 Connect Planning to Execution

Planning only adds value when it leads to projects on the ground. The IDB emphasises the need for:

• Operational roadmaps that translate plans into sequences of tenders, permits and construction milestones.

• Clear responsibilities and timelines for each institution.

• Alignment with budget processes, PPP frameworks and financing strategies.

In short, planning should become the first mile of implementation, not the final step of a purely analytical task.

5. From Vision to Project Pipelines

Countries and utilities often ask: “How do we move from a 100-page plan to a realistic set of projects we can actually finance and deliver?”

A robust approach usually involves:

5.1 Prioritisation Frameworks

Establish transparent criteria to classify projects as:

• Strategic backbone reinforcements.

• Regional interconnectors.

• Reliability and resilience upgrades.

• Renewables integration lines.

• Targeted congestion relief schemes.

Each category may have different evaluation thresholds, financing options and delivery models.

5.2 Readiness and Feasibility Filters

Introduce readiness filters to identify which projects can move quickly:

• Availability of pre-feasibility studies and route options.

• Complexity of environmental and social issues.

• Land tenure risks.

• Alignment with industrial and territorial priorities.

• Indicative interest from financiers or PPP bidders.

This helps create tiered pipelines: near-term, medium-term, and long-term projects.

5.3 Linking to Finance and Regulation

Plans should be linked to:

• Regulatory mechanisms that recover investments through tariffs or availability payments.

• Budget envelopes and medium-term expenditure frameworks.

• Targets for climate and development finance, ensuring that the most climate-relevant projects are prepared with suitable documentation for multilateral development banks and climate funds.

By closing the loop between planning, regulation and finance, countries can convert planning documents into investment programmes rather than aspirational lists.

6. Data, Digitalisation and Tools

Modern planning relies on data and digital infrastructure as much as on physical infrastructure. The IDB highlights persistent gaps in LAC around digitalisation of planning, access requests and permitting processes.

Key priorities include:

• Integrated data platforms for demand, generation, grid topology, constraints, connection requests, and system events.

• Online portals for grid access, with transparent information on available capacity and criteria.

• Use of advanced modelling tools (e.g., stochastic simulation, probabilistic risk analysis, optimisation platforms) integrated into planning workflows.

• Digital twins of critical networks to test scenarios, evaluate contingencies and design operational solutions.

Digitalisation not only improves the technical quality of planning; it also enhances transparency and accountability, building trust with market participants and communities.

7. Caribbean Transmission Planning: Small Systems, Big Risks

For Caribbean countries, the planning agenda has specific characteristics:

• Small systems, high stakes – A single line or substation can be system-critical. Planning must consider contingencies carefully and define appropriate levels of redundancy.

• Extreme weather exposure – Plans need to incorporate not just routine reliability, but resilience to hurricanes, flooding and coastal hazards. This may justify hardening investments or relocation of critical assets, even if upfront costs are higher.

• Tourism and coastal land use – Routing and siting decisions can have major implications for tourism, fisheries, and coastal communities. Strong integration with land-use planning is essential.

• Scale and capacity constraints – Limited fiscal space and small utility balance sheets make it harder to finance large projects; planning must identify opportunities for regional solutions, pooled procurement, or targeted climate and development finance.

At the same time, the Caribbean can be a laboratory for innovation:

• Pilots for microgrids, distributed storage and demand response.

• Regional initiatives to harmonise technical standards and share expertise.

• Digital tools and cloud-based planning platforms that reduce upfront IT investment.

By internalising these realities, Caribbean planners can design grids that are not only adequate and efficient, but disaster-ready and future-proof.

8. How Dawgen Global Can Support Transmission Planning Reform

Turning the IDB’s planning agenda into reality requires integrated support—technical, economic, institutional and financial. Dawgen Global, as a multidisciplinary professional services firm headquartered in the Caribbean with regional reach, is well positioned to help.

8.1 Planning Framework and Institutional Design

Dawgen Global can assist governments and regulators to:

• Review existing planning mandates, institutional roles and coordination mechanisms.

• Design or update transmission planning regulations and procedures, aligned with IDB recommendations and international good practice.

• Set up inter-institutional working groups and governance structures to anchor planning in stable institutions.

8.2 Scenario Design and System Modelling Support

We can work alongside national planners and system operators to:

• Develop robust scenario sets reflecting demand, renewables, electrification and climate risks.

• Support the adoption or optimisation of advanced planning tools (including external partners where specialised software is required).

• Integrate non-wires solutions and grid-enhancing technologies into planning methodologies.

8.3 From Plan to Investment Pipeline

Dawgen Global’s financial advisory and risk teams can help:

• Translate planning outputs into prioritised project pipelines.

• Conduct pre-feasibility assessments and screening for climate and development finance eligibility.

• Prepare investment plans and financing strategies, including PPP options and blended-finance structures.

8.4 Caribbean-Focused Support

Given our base and experience in the region, Dawgen Global can bring:

• Expertise on resilience-driven planning for small island systems.

• Understanding of how to balance energy, tourism, coastal protection and land-use priorities.

• Knowledge of regional institutions and financing windows relevant for Caribbean infrastructure.

By bridging the gap between technical planning, economic analysis, institutional reform and project finance, Dawgen Global can help LAC and Caribbean stakeholders turn planning into a powerful lever for grid transformation.

9. Planning as the First Mile of Grid Transformation

Transmission planning is often treated as an internal, specialised exercise. IDB’s “Unlocking the Grid” invites countries to see it differently: as a strategic, political and economic tool that will determine whether the region can deliver reliable, sustainable and competitive energy.

Planning is the first mile of grid transformation. If done well—anchored in strong institutions, advanced methods, realistic execution pathways and clear links to finance—it can unlock a new generation of transmission systems: smarter, stronger, more resilient, and better aligned with development goals.

If done poorly, even the best generation plans, regulatory reforms and financing schemes will struggle to overcome bottlenecks, delays and social conflict.

For Latin America and the Caribbean, particularly for vulnerable small island systems, the stakes could not be higher. Robust transmission planning is not just about drawing lines on a map; it is about drawing a credible path to a secure, low-carbon, and prosperous future.

Partner with Dawgen Global

At Dawgen Global, we help you make Smarter and More Effective Decisions—from strategy and regulation to project pipelines and execution.

If your government, regulator, utility or investment vehicle is seeking to:

• Strengthen transmission planning frameworks and governance.

• Align planning with energy transition, climate resilience and industrial policy.

• Convert long-term plans into prioritised, bankable project portfolios.

• Access climate and development finance for grid investments.

…our multidisciplinary team is ready to support you.

Let’s have a conversation:

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