Our Services
On-Demand Dispatch Down Report
At TNEI Ireland, we understand that navigating grid constraints and renewable integration challenges requires clear, data-driven insights.
To support our clients in making informed decisions, we’ve developed the On-Demand Dispatch Down Report—a streamlined, tailored analysis designed to forecast grid limitations, assess renewable curtailment risks, and uncover optimisation opportunities.
Make data driven decisions
We pride ourselves on evolving with our clients’ needs. Traditional network constraints assessments have always been highly bespoke, shaped around specific project requirements. However, through ongoing discussions, we’ve consistently heard a key request: a faster, more accessible way to obtain high-quality constraints analysis—without sacrificing accuracy or reliability.
Our new On-Demand Dispatch Down Report is our response. Built on widely accepted industry assumptions and best practices, this report delivers rapid, high-quality insights, reflecting the most frequent requirements from our bespoke analyses.
Whether you’re evaluating new projects, assessing risks, or optimising operations, this report provides a smarter, more efficient way to access essential grid insights.
We have chosen a single baseline scenario to describe the trajectory of the future power system. To ensure consistency and transparency, this scenario is based on publicly available data. We have considered two study years, 2028 and 2032.
Assumptions
- Demand growth assumptions are based on Generation Capacity Statement 2023-2032.
- The data underpinning the model is based on the EirGrid and SONI All-island Ten-Year Transmission Forecast Statement 2022-2031 and updated with project updates from EirGrid Network Delivery Program Q4 2024 (NDP) from the EirGrid and SONI Shaping Our Electricity Future (SOEF).
- Wind and solar connections up to and including ECP 2.3 were assumed in the 2028 study year and up to and including ECP 2.4 for the 2032 study year.
- Phase 1 Offshore connections (5 GW) were assumed in 2032 study year only.
- Northern Ireland renewable generation was increased in line with forecasts in the Generation Capacity Statement 2023-2032.
- EWIC, Moyle, Greenlink and Celtic interconnector were assumed in place for both study years
- North South Interconnector was assumed in place in 2032 study year only.
- It was assumed that energy storage is not deployed to mitigate surplus, curtailment or constraint. Batteries are not modelled within either study year.
- Operation constraints are aligned with EirGrid’s Operational Policy Roadmap 2023 – 2032.
- Pro rata constraint dispatch down was assumed - no distinction is made between priority and non-priority generators
Our Approach
At TNEI Ireland, we use a systematic, data-driven approach to forecast future power system constraints and dispatch down levels. Our model simulates an hourly operating schedule, capturing changes in demand, generation, and interconnection.
Based on standard unit commitment and economic dispatch principals as well as operational constraints, we identify surplus energy and curtailment levels, leading to the first phases of renewable power reduction.
N and N-1 security tests are then applied to identify transmission network overloads on an hourly basis.
The renewable generation connections who contribute to a particular overload, prioritising those with the highest sensitivity, are identified and constraint groups, that link overloaded transmission circuits to specific controllable wind and/or solar farms, are formed. We then move through a sequential dispatch down process until all overloads are resolved.
Wind and/or solar farms are grouped based on their effectiveness in alleviating constraints, measured by the relative change in output versus the constraint level. Our methodology follows EirGrid’s Wind Dispatch Tool Constraint Group Overview.
Results
You will receive a comprehensive Dispatch Down analysis tailored to your specific connection, including detailed insights and an in-depth hourly profile of your generator. This report will illustrate power reductions across the year, providing valuable observations to inform your decision-making.
Once you have had time to review and reflect on your report, you will also receive a one-on-one consultation with one of our grid experts. In this meeting, you’ll have the opportunity to ask questions, gain further clarity, and discuss how the insights apply to your specific situation.
Sensitivities/Further work
TNEI offers additional analysis and sensitivity assessments for this study, including alternative study years, modifications to generator or interconnector assumptions, and evaluations of energy storage impacts.
Please note that any sensitivity analysis must align with the assumptions and methodology used in the On-Demand Dispatch Down study. Significant deviations from the base scenario will be treated as a new, standalone study.
For further discussion on your specific requirements, contact the Dispatch Down team.
Request my report.
A faster, more accessible way to obtain high-quality constraints analysis
Whether you’re evaluating new projects, assessing risks, or optimising operations, this report provides a smarter, more efficient way to access essential grid insights.
