Calculator
Example data table
| Scenario | Autonomy (0–10) | N-1 Redundancy (0–10) | Islanding (0–10) | Cyber (0–10) | Overall Score |
|---|---|---|---|---|---|
| Temporary site microgrid, minimal storage | 4 | 5 | 6 | 4 | ~52 |
| Hybrid solar, storage, generator, tested islanding | 8 | 7 | 8 | 6 | ~78 |
| Critical facility build, hardened, strong governance | 9 | 9 | 9 | 8 | ~90 |
Formula used
Each factor is scored from 0 to 10. Each factor also has a weight. The calculator normalizes weights so their sum becomes 100.
- Normalized Weight (%) = Weight ÷ ΣWeights × 100
- Contribution (points) = (Factor Score ÷ 10) × Normalized Weight
- Overall Resilience Score = ΣContributions (0 to 100)
- Resilience Index = Overall Score ÷ 100
How to use this calculator
- Gather design and operations details for the site microgrid.
- Rate each factor from 0 to 10 using project evidence.
- Optionally enable custom weights for your risk priorities.
- Press Score Resilience to compute results.
- Review the top priorities and factor contributions.
- Export CSV or PDF to attach to design reviews and bids.
Microgrid resilience scoring for construction projects
Why scoring matters during delivery
Construction sites increasingly rely on electrified tools, temporary towers, and digital controls. Downtime can idle crews and delay critical pours. A structured score turns qualitative risk into a comparable metric for bids, design reviews, and owner reporting. Many projects target a score above 70 to indicate “high” resilience and to justify contingency budgets. A repeatable score also supports consistent decisions across multiple sites.
Practical performance benchmarks
For autonomy, teams often aim for 24 to 72 hours of operation without outside supply, depending on logistics and safety requirements. Critical load coverage commonly ranges from 40% on temporary sites to 80% or more for critical facilities. Where fast transfer is required, islanding controls may be designed for seamless or sub‑second transitions, supported by stable frequency control. Fuel supply scoring should reflect storage days, delivery routes, and contract priority during emergencies.
Redundancy, governance, and cyber readiness
N‑1 redundancy means losing one major asset still serves essential loads. Pairing solar, storage, and engines improves resource diversity and reduces exposure to a single fuel or mechanical failure. Protection coordination helps faults clear selectively, limiting outage scope during island operation. Resilience also depends on routine drills, verified black start steps, segmented networks, least‑privilege access, and monitored remote connections. Many teams run monthly functional checks and quarterly response drills to keep procedures current, especially where contractor turnover is high.
Using the score to prioritize upgrades
The calculator highlights contributions from each factor, so teams can fund the highest impact gaps first. Raising a low‑scoring, high‑weight area like islanding controls or autonomy typically moves the overall result more than improving already strong areas. Use the priorities list to plan upgrades such as added storage, alternate feeders, hardened enclosures, or improved monitoring. Export outputs to document assumptions, align stakeholders, and track improvements across phases.
FAQs
1) What does a 0–10 score mean for each factor?
It is a practical rating of maturity and evidence. 0 means missing or ineffective, 5 is baseline capability, and 10 is proven performance with documentation, tests, and monitoring.
2) Do custom weights need to total 100?
No. The calculator automatically normalizes your weights so the effective total becomes 100. This allows you to emphasize site‑specific risks without manual balancing.
3) How should I score energy autonomy?
Use realistic outage operation time based on storage, fuel, contracts, delivery access, and load shedding. Score higher when autonomy remains strong under worst‑case logistics.
4) What is N‑1 redundancy in simple terms?
It means the microgrid can lose one key component, such as an engine or inverter, and still keep critical loads energized through remaining assets and controls.
5) Why is protection coordination included?
Poor coordination can trip healthy feeders during faults. Selective protection isolates the problem area, reduces outage scope, and supports safe island operation with predictable fault clearing.
6) How often should testing and training occur?
At minimum, test during commissioning and after material changes. For active sites, monthly checks and quarterly drills are common. Higher frequency is recommended for critical facilities.
7) Can this replace a detailed engineering study?
No. It is a screening and communication tool. Use it to compare options and highlight gaps, then validate design with load flow, protection studies, and operational procedures.