| Units: | - |
| Mode: | Input Only |
| Multi-band: | True |
| Default Value: | 1 |
| Validation Rule: | Any Value |
| Key Property: | No |
| Description: | Generation efficiency scalar at the given [Efficiency Point] |
Generator Head Storage Efficiency Scalar is used to model the effect of 'head' on hydro generation efficiency. It is the generation efficiency scalar associated with the multi-band Efficiency Point. Efficiency Scalar should be defined in multiple bands with the highest value in band 1 and monotonically non-increasing thereafter as in the following example. The Efficiency Scalar values modify the efficiency curve defined by Efficiency Base and Efficiency Incr. Value less than unity imply that efficiency is reduced, values above unity that efficiency is increased.
Example:
| Property | Value | Units | Band |
|---|---|---|---|
| Efficiency Point | 95 | % | 1 |
| Efficiency Point | 85 | % | 2 |
| Efficiency Point | 75 | % | 3 |
| Efficiency Point | 65 | % | 4 |
| Efficiency Point | 55 | % | 5 |
| Efficiency Point | 45 | % | 6 |
| Efficiency Point | 35 | % | 7 |
| Efficiency Point | 25 | % | 8 |
| Efficiency Point | 15 | % | 9 |
| Efficiency Point | 5 | % | 10 |
| Efficiency Scalar | 1 | - | 1 |
| Efficiency Scalar | 0.982975728 | - | 2 |
| Efficiency Scalar | 0.965386854 | - | 3 |
| Efficiency Scalar | 0.947173173 | - | 4 |
| Efficiency Scalar | 0.928262958 | - | 5 |
| Efficiency Scalar | 0.908569604 | - | 6 |
| Efficiency Scalar | 0.887986918 | - | 7 |
| Efficiency Scalar | 0.866382291 | - | 8 |
| Efficiency Scalar | 0.843586464 | - | 9 |
| Efficiency Scalar | 0.819377554 | - | 10 |
Note that the Min Stable
Level (or Min Stable
Factor) may also vary according to the available head.
There are two solution approaches available for modeling head effects - see Generator Head Effects Method.