There are several input values for a substation. Some are the same for O&M Design™ and Con Design™. These are: members, parameters and weather.
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- Parameters
- Scheduled maintenance
- Corrective maintenance
- Completion
- Commissioning
- Post Commissioning
- Weather
Parameters
| Input label | Mandatory | Description |
|---|---|---|
| Maximum number of technicians in asset | x | The maximum number of technicians allowed onboard the substation at the same time. |
For Construction you will find an additional field:
| Input label | Mandatory | Description |
|---|---|---|
| Work Order type | x | Regular installation or feeder concept using barge vessels |
| Loadout port | x | The base where the Asset is assigned for loadout. It needs to be the same Port where the vessel for that task is. |
Scheduled maintenance and Components are for O&M Design™ only. An OSS registers downtime on all assets on the same wind farm and it's possible to specify how big of an impact each failure on the OSS has. It takes all substation downtime into account, so for corrective critical maintenance, the downtime is considered from when it fails until it is up and running again, and for non-critical/opportunistic, it takes the time where work is being done as for scheduled maintenance.
- Failure occurs on a substation
- The impact on Power Production is 100%
- The actual power production for the wind farm for the duration of the failure is 100%
- The reduced and therefore the new actual power production for the wind farm in that duration will be 0%
- Failure occurs on a substation
- The impact on Power Production is 50%
- The actual power production for the wind farm for the duration of the failure is 100%
- The reduced and therefore the new actual power production for the wind farm in that duration will be 50%
You can define what vessel will be assigned to each task inside Scheduled and Corrective maintenance. The different vessels will appear inside these tasks once these vessels have been added in the logistics tab in the case.
Scheduled maintenance
Scheduled maintenance is the maintenance that is planned. Annual service, inspections, certifications, and other types of scheduled maintenance can be specified for a substation type. You can add as many SM tasks as needed by clicking + Add Scheduled Maintenance button in the left side of the modal. Once the task is filled, click Save. Each scheduled maintenance task can be specified by using the following:
| Input label | Mandatory | Description |
|---|---|---|
| Start date | x | The start date of the scheduled maintenance |
| Scheduling | x | Here it's possible to define if a scheduled maintenance should be done every defined period (e.g. every year) or on a percentages basis of the assets each year. Depending on this, the field "Asset percentage" or the field "Recurrence" mentioned below. You can use Scheduling or Recurrence, but not both at the same time |
| Asset percentage | x | Describes the percentage of the substations that will be maintained the year defined |
| Recurrence | x | The frequency of the maintenance. The number is the time between every maintenance task. If 0 is applied, this task will only be done the first year; if 1 is applied, the task is done every year; if 2 is applied, the task is done every other year; and so on |
| Production impact during work | x | The failure in the substation will stated the % lost production (% reduced production). If there are multiple substations down, the one with the highest % reduced production will set how much is lost |
| Vessel | x | Type of vessel that will be allowed to do Scheduled maintenance (CTV, SOV, Helicopter) |
| Personnel | x | The role and number of specific personnel needed to carry out the task |
| Man hours time series | x | Add simulation year (e.g. 1, 2...) and Total man hours needed for the task each defined year |
| Total man hours | x | Total Man hours needed for the task |
| Repair time | - | Total repair time for one maintenance task. This is automatically calculated dividing Total man hours by the total number of technicians in the task |
| Spare part cost (per event) | - | The cost of spare parts per event. Currency can be defined, Index and year. Also, cost time series can be saved for user library purposes |
| Consumables (per event) | - | A variety of other costs involved with the task, for each. Currency can be defined, Index and year. Also, cost time series can be saved for user library purposes |
Corrective maintenance
In the tab Corrective maintenance, the failures are defined. These failures will occur randomly when simulating and hence generate unplanned maintenance. You can add as many component tasks as needed by clicking + Add Corrective Maintenance button in the left side of the modal.
The fields represented in the following list are common regardless of the vessel assigned.
| Input label | Mandatory | Description |
|---|---|---|
| Severity | x | The prioritisation of the failure. If a critical failure occurs, the production must shut down in order to repair it and no other maintenance will be planned until that is fixed. A non-critical will not affect production, and other maintenance can be carried out. If a none consequence failure occurs, it will be repaired the next time a maintenance task is carried out at the specific turbine. Opportunistic represents unplanned failures and will not affect production |
| Distribution | x | The statistical distribution of the failure. Exponential or Weibull. If Weibull is selected, the shape parameter can be defined and an annual failure rate |
| Failure rate time series | x | Only applies to exponential distribution. Describing the number of the OSSsthat will fail in specific years |
| Annual failure rate | x | The annual frequency of the failure. The same every year. If exponential and time series is applied, this field will not be available |
| Production impact during work | x | The failure in the substation will stated the % lost production (% reduced production). If there are multiple substations down, the one with the highest % reduced production will set how much is lost |
| Production impact from failure | x* *Only applicable and visible when the corrective maintenance tasks severity is set to Critical | Reflects the impact this failure will have on energy production when the failure happens in %. *can be hidden - see below |
| Vessel | x | The types of vessels needed to repair the failure |
| Spare part cost (per event) | - | The cost of spare parts needed to repair the failure. Currency can be defined, Index and year. Also, cost time series can be saved for user library purposes |
| Consumables (per event) | - | All sorts of other costs involved in repairing the failure. Currency can be defined, Index and year. Also, cost time series can be saved for user library purposes |
Component failures with CTV, SOV or helicopter
There are different fields depending on the possible transportations. Below a list of the possible information for a failure which has to be fixed with a CTV, SOV or a helicopter.
| Input label | Mandatory | Description |
|---|---|---|
| Vessel | x | The types of vessels needed to repair the failure, in this case, a CTV, SOV or helicopter |
| Man hours time series | x | Add simulation year (e.g. 1, 2...) and Total man hours needed for the task each defined year |
| Man hours | x | Total Man hours needed to repair the failure |
| Repair time | - | Total repair time for one failure. This is automatically calculated dividing Man hours by the total number of technicians in the task |
| Lead time | x | The lead time is the preparation time at the port. This could e.g. include the procurement of spare parts. Simultaneous to this, details about transit to the wind farm, connecting- and disconnecting the turbine, and transit from the wind farm will be prepared. The lead time starts when the failure happens, and it cannot be scheduled until the lead time is finished. |
| Technicians | x | The specific role and personnel number needed to repair the failure |
| Limitations | - | Weather limitations when repairing the failure. Firstly, the limitations must be defined in the weather criteria tab, making it possible to select them at the bottom in the different tasks created. Add a limitation title and define wave and wind speed criteria |
Completion
Completion of wind farm components refers to the processes for making the components ready for production. It will start after the installation is finished and needs to be completed to start commissioning. You can add several completion tasks by clicking + Add commissioning at the bottom and these will happen in the order in the simulation.
| Input label | Mandatory | Description |
|---|---|---|
| Completion man hours | x | The man-hours needed to carry out the completion |
| Completion duration | - | The duration of the completion. Automatically calculated dividing man-hours by the number of technicians. It is the input used for calculations in the simulation |
| Completion delay | - | The time needed before completion can start once installation is completed |
| Weather window | - | Weather window required for the completion task. The weather limitations used are the ones found on the "Weather criteria" tab on the assigned vessel(s) |
| Technicians | x | The role and number of specific personnel needed to carry out the completion |
| Vessel | x | Selection of the vessel/vessels needed to carry out the completion |
Commissioning
Commissioning of wind farm components refers to the final procedures before the turbines start producing energy. It will start once completion is done. You can add several commissioning tasks by clicking + Add commissioning at the bottom and these will happen in the order in the simulation.
| Input label | Mandatory | Description |
|---|---|---|
| Commissioning man hours | x | The man-hours needed to carry out the commissioning |
| Commissioning duration | - | The duration of the commissioning. Automatically calculated dividing man-hours by the number of technicians. It is the input used for calculations in the simulation |
| Commissioning delay | - | The time needed before commissioning can start once completion is done |
| Weather window | - | Weather window required for the commissioning task. The weather limitations used are the ones found on the "Weather criteria" tab on the assigned vessel(s) |
| Technicians | x | The role and number of specific personnel needed to carry out the commissioning |
| Vessel | x | Selection of the vessel/vessels needed to carry out the commissioning |
Post Commissioning
Post Commissioning of wind farm components refers to the procedures when the turbines can start producing energy. It will start once commissioning is done. You can add several completion tasks by clicking + Add Post commissioning at the bottom and these will happen in the order in the simulation. It represents the third type of tasks that can be done and if commissioning delay is the same as delay in Testing, these tasks are done while the wind turbines have started to produce.
| Input label | Mandatory | Description |
|---|---|---|
| Post commissioning man hours | x | The man-hours needed to carry out the post commissioning |
| Post commissioning duration | - | The duration of the post commissioning. Automatically calculated dividing man-hours by the number of technicians. It is the input used for calculations in the simulation |
| Post commissioning delay | - | The time needed before post commissioning can start once completion is done |
| Weather window | - | Weather window required for the post commissioning task. The weather limitations used are the ones found on the "Weather criteria" tab on the assigned vessel(s) |
| Technicians | x | The role and number of specific personnel needed to carry out the post commissioning |
| Vessel | x | Selection of the vessel/vessels needed to carry out the commissioning |
Weather
This is the weather data that will be used in the simulation. Can use either imported weather data, or the ERA5 weather data. Please see this article on how the two different weather files selections work.
The Power law exponent for wind profile is 0.11 by default in all assets. It is used to represent the sea surface roughness for the extrapolation of wind speed in case of wind speed for more than one hub height is defined in the weather data time series. It can also be applied to all cases.
| Input label | Mandatory | Description |
|---|---|---|
| Select weather from input library OR select a weather file via the map | x | Select the weather file to be used. |
| Apply this weather to the entire case | - | Click here to apply your uploaded weather file to the entire case (other assets and bases) |