Lesson 06 / 12 · N+1 capacity reasoning
Check a surviving path
Are two paths enough when either one must carry the whole load?
Predict before you run
Write down your prediction, then change only the input below. In the interactive lesson, compare the starting case with the challenge and export a worksheet to retain your reasoning.
| Input | Starting value | Challenge value |
|---|---|---|
| Each path gross capacity | 700 kW | 1100 kW |
Reported quantity: kW unserved. The live control accepts 100–1500 kW.
Worked answer
One 700 kW path delivers 665 kW after losses, leaving 335 kW unmet. One 1,100 kW path can deliver the full 1,000 kW request. This tests a capacity condition, not a complete N+1 classification.
Reproduce the configuration
| IT demand / simulated duration | 1000 kW / 1800 s |
|---|---|
| Opening battery / energy capacity | 100 kWh / 100 kWh |
| Charging power limit | 100 kW |
| Charge / discharge efficiency | 0.95 / 0.9 |
| Distribution efficiency | 0.95 |
| Generator start delay | 30 s |
Scheduled events
- 300 s: path-a — asset down
- 900 s: path-a — asset up
The browser lesson applies its configuration to the path_maintenance preset. Open it above, run the starting case, switch to the challenge, and use “Verify against Python” to compare complete results. Use the worksheet export to keep the prediction, completed inputs and answer together.
Sources and verification
- Exact lesson definitions and input transformations
- Native Python default/challenge checks
- 1 MW equations and independent energy-ledger reconstruction
- Electrical continuity contract
Original material by Mohammad Rezwan Khan, engine 1.0.0. Synthetic teaching cases; no facility calibration or independent external reproduction has been established. Annual PUE planning and outage continuity are different calculations. Full scope and evidence.