Reports, Analysis & Database Functions

They provide extensive analysis and viewing functions for statistical and event data. Reports are built up using easy to follow ‘Report Definition Forms’. When finished they can either be viewed immediately or stored as ‘Predefined Reports’ for later use. They can be stored either in the ‘System’ box where they are available to all users or in the ‘User’ box where they are only available to the defined user.

Predefined Reports are produced at the click of a button, emailed to recipients at predefined times or stored in a file. This means custom reports are delivered automatically at the end of the specified time period.

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Expected energy output is calculated using the reference power curve for the turbine type.

Energy lost during periods of downtime may also be calculated on the basis of actual wind speed and warranted power curve.

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...data for any selected signal from turbines, metering stations and meteorological masts. less

The user may browse the ten-minute data and events database and show the events for any unit for any time period. The system allows the user complete freedom in browsing the database with more common selections catered for in drop down menus.

The user can view turbine and wind farm event data with options to select a turbine or a group of turbines, include events from grid stations, meteorological stations and servers, select time range and list all events or show totals only.

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Power Curves can be generated according to the IEC 61400-12 Standard and include the following options:

• Application of speed-up factors.
• Standard error analysis.
• Air density correction: to specified value based on measured temperature and pressure data, record by record based on measured temperature and pressure data or average correction for period.
• Wind direction exclusion sectors.
• Exclusion of records where icing occurred.
• Filtering of data based on:
  • minimum sample rates
  • minimum number of readings
  • record length

Power curves may be generated using nacelle or any meteorological station wind speed signal. It is possible to apply user specified corrections to nacelle anemometer readings to obtain the free stream wind speed.

Power curves can be either shown immediately or queued for delivery by email at a later date. Facilities are also provided to queue a batch of Power Curves reports for groups of turbines.

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Distributions can be created over any user selectable date range with a selectable bin size and choices of binned or scatter data. They may be generated from any meteorological station or nacelle anemometer with optional correction of nacelle wind speeds.

Results can either be shown immediately or queued for delivery by email.

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Default calculations are supplied with the system. In addition the user may define their own availability calculations based on the addition and division of these time categories.

Availability category	Time	Status
No SCADA	T1	The SCADA system is out of operation.
Force majeure	T2	Force Majeure condition exists on the wind farm.
No comms	T3	The SCADA communications system is functioning correctly but no data communication is available from the turbine controller.
On line	T4	Turbine generator on line.
Grid limits stop	T5	The grid is outside agreed operational limits.
Ambient temperature stop	T6	The wind farm ambient temperature is outside the agreed turbine operational limits.
Off line wind in limits	T7	Turbine is released to run and wind is within limits but turbine generator is off line. This may be due to turbine operations such as cable unwinds and generator changes.
Off line wind out limits	T8	Turbine is released to run but generator is off line due to wind conditions being outside the operational limits.
Fault stop wind in limits	T9	Turbine is stopped with a turbine fault requiring operator intervention. Wind is within operational limits.
Fault stop wind out limits	T10	Turbine is stopped with a turbine fault requiring operator intervention. Wind is outside operational limits.
Maintenance stop wind out limits	T12	Turbine is stopped for scheduled or unscheduled maintenance while the wind is outside operational limits.
Operator stop wind in limits	T13	Turbine is stopped by operator command while the wind is within operational limits.
Operator stop wind out limits	T14	Turbine is stopped by operator command while the wind is outside operational limits.
Constraint stop	T15	Turbine is stopped for operational constraints (time of day, noise etc). May be manual or pre-programmed.

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