7 results found
Would it possible to add a feature that in the time-based availability calculations we would be able to include curtailments in the calculations. Meaning that if a turbine is curtailed to 50% during an hour, the turbine will have availability of 50% during that hour. I assume that this is not anyhow possible at the moment?13 votes
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When an turbine implies degraded operation instead of complete shutdown (not full power when it can) the degraded operation factor shall be classified as degraded downtime for the relevant degraded Wind turbine and in accordance with the availability formula.
Example: Turbine A is operating with cooling issues, therefore the turbine can operate but not on full power, meaning it is curtailed out of safety. In normal operation the turbine is able to produce 4Mw, due to the temperature issue it can now only produce 2Mw. This means that for the time of degraded operation, the turbine availability is 50% instead…8 votes
Make it possible to upload the Default Power Reduction Mode Allocation List from Vestas to manage curtailments
Vestas turbines with PPC uses Power Derete Internal codes that in Greenbyte is called Curtailment mode signals. These signal indicate a curtailment event that could have direct impact on the contracual availibility depending on how they are categorized. What the signals indicate and how they should be catecorized are listed in the Default Power Reduction Mode Allocation List.
The only way to get the Greenbyte system to take this signals into account in the contractual availibity right now is to create an alert and link that alert to one of your curtailment satuses. It not very optimal (with a growing…5 votes
Each contract is different and a common detail in a service contract like a maximum allowed number of maintenance hours (not taken into account for the unavailability) is not possible in Greenbyte.
Therefore the numbers in the greenbyte report must be recalculated by the number of scheduled maintenance in order to calculate the contractual availability.2 votes
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As off today, if 10-minutes data are missing for some reason (scada issue for example), then this period is just not taken into account for contractual availability calculation and for system availability calculation. This is an issue because in many case, when accessing the turbines, the maintenance technicians will shut down the communication to prevent remote restart of the turbine, and this loss of communication will also trigger wrong availability calculation.
We expect time-based availability to be based on the period duration, not the 10-min data being there or not, and during data losses, the turbine should be considered available.…8 votes
When creating a task there is an option that may be selected that is labeled "Affects Downtime". If this option is enabled, the availability contract categories should appear and one should be assigned to the task.
This would be useful for sites that are utilizing tasks to coordinate site work.8 votes
It would be extremely useful to be able to create custom availability contracts that use different methods for calculating lost production and energetic availability.8 votes
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