Lesson 07 / 12 · Failure domains
Expose shared control failures
Can a shared control fault defeat both power paths?
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 |
|---|---|---|
| Path B shares failed controls (0 = no, 1 = yes) | 1 | 0 |
Reported quantity: kW unserved. The live control accepts 0–1.
Worked answer Link to this answer
Both paths share the failed control domain initially: 1,000 kW is unmet. Removing that dependency from path B preserves its 665 kW delivery, leaving 335 kW unmet.
| Configuration | Path B shares failed controls (0 = no, 1 = yes) | Result (kW unserved) |
|---|---|---|
| Starting case | 1 | 1,000 |
| Challenge | 0 | 335 |
Calculated from the same inputs as the interactive lesson. Display rounded to six decimal places; full decimal strings, inputs and energy records are in the downloadable result record.
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: shared-controls — domain down
- 900 s: shared-controls — domain up
The browser lesson applies its configuration to the shared_domain 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
- Lesson definitions and input transformations
- Native Python default/challenge checks
- Electrical continuity contract
- Three reference cases, equations and versioned source records
Cite this lesson
Mohammad Rezwan Khan. “Expose shared control failures.” Datacenter Twin Lab, engine 2.0.1. https://khanlab.co.technology/learn/shared-controls/
Documentation source: 4878472c4d6c166c3dbd81aee292a0a56e89ffff. For a numerical claim, also retain the completed inputs and the result record; the live lesson can be changed by its controls.
Original material by Mohammad Rezwan Khan, engine 2.0.1. 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.