Electrical generator load-step worksheet calculator

Calculate start-step peak demands and final running demand with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use start-step peak demands and final running demand to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Running demands in start order (kW)
5,10,3
Starting demands in same order (kW)
15,25,3
User-approved transient limit (kW)
40
User-approved running limit (kW)
30
Start-step peak demands (JSON)
[15,30,18]
Final running demand (kW)
18
Steps above transient limit (JSON)
[]
Running-limit margin (kW)
12

Try another scenario

Running demands in start order (kW)
[6, 10, 3]
Starting demands in same order (kW)
[15, 25, 3]
User-approved transient limit (kW)
40
User-approved running limit (kW)
30
Start-step peak demands (JSON)
[15,31,19]
Final running demand (kW)
19
Steps above transient limit (JSON)
[]
Running-limit margin (kW)
11
Calculation method

Calculation method

Start-step peak demands (JSON)

At each start, already-running demand plus that load’s starting demand; running load accumulates.

Final running demand (kW)

At each start, already-running demand plus that load’s starting demand; running load accumulates.

Steps above transient limit (JSON)

At each start, already-running demand plus that load’s starting demand; running load accumulates.

Running-limit margin (kW)

At each start, already-running demand plus that load’s starting demand; running load accumulates.

Symbols and units
a
Running demands in start order (kW)
b
Starting demands in same order (kW)
c
User-approved transient limit (kW)
d
User-approved running limit (kW)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Sequential kW arithmetic; does not model frequency/voltage dip, kVA, harmonics or generator dynamic response. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
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