5 nielsen forecasting
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 1
Forecast solutions for the energy sector
ENFOR A/S
Lyngsø Allé 3
DK-2970 Hørsholm
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 2
Consumption and production forecasts
• Heat load forecasts for district heating systems – usually for a horizons up to one week, but up to one month exists.
• Power load forecasts – for horizons up to one week, could be longer.
• Wind power production forecasts – usually day ahead, but up to one week is feasible.
• Solar PV power production forecasts – usually day ahead, but up to one week is feasible.
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 3
General forecast principle
• Calibrated against actual production / consumption available on-line or off-line in batches.
• If on-line data is available the autocorrelation is used in order to improve short-term performance.
Energy forecast solutions
(Multiple) Numerical Weather Forecast
Forecast Engine
Actual Value
Forecast Value(s)
System
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 4
Meteorological forecasts (input)
• Systems generally use meteorological forecasts of relevant meteorological quantities (temperature, wind speed, solar irradiance, etc.)
• Any meteorological forecast provider can be integrated, providing that NWP data can be delivered on an appropriate format via the Internet.
Energy forecast solutions
• ENFOR is able to provide ECMWF and GFS forecasts as part of our service.
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 5
Price forecasts
• DK1/2
• Spot price forecasts, based on wind power and load forecasts.
• Imbalance unit costs.
• UK
• N2Ex auction prices, based on system messages, including wind power and load forecasts.
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 6
MetFor
• Calibrated against local temperature measurements.
• Based on optimally combined ECMWF and GFS forecasts.
• Outperforms standard meteorological forecasts.
• Delivered as a service via FTP.
Energy forecast solutions
• Standard meteorological forecasts (temperature, wind, sun).
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 7
MetFor performance
Based on:
• Hourly values
• Two years of data
• Three sites
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 8
Wind Power Prediction Tool
• Highly configurable wind power predictions for farms or regions.
• Handles actual availability and curtailment, including corresponding schedules.
• Available as service or on-site installation.
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 9
Energy forecast solutions
The plot show performance of four power-curve models, WPPT being one of them. Among the 3 remaining one is a simple model whereas the two others are commercial models. The results are valid for a GW installation consisting of several frams, generally in difficult forecast locations. Evaluation is based on exactly the same data (time points).
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 10
WPPT modules
• Base
• Optimal forecast combination
• High resolution
• Quantile regression
• Ensemble forecasting
• SCADA upscaling
• Scenario generation
• Shut-down probability
• Icing detection and prediction
Energy forecast solutions
DK2, 7-day ahead, ensemble based
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 11
Solar Power Forecasting
• Fixed or tracking systems.
• Advanced pre-processing of NWP data allow forecasts for short intervals.
• Combination of several NWP sources.
Energy forecast solutions
Source: BSW-Solar
• Quantile regression and scenario generation.
• Available as service or on-site installation.
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 12
Comparison of models using ECMWF
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 13
SolarFor using GFS-HD and ECMWF
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 14
PRESS-Prognosis
• Use configurable calendar.
• Combination of several NWP sources via MetFor.
• Quantile regression and scenario generation possible.
Energy forecast solutions
• Can be extended with supply temperature and production optimization.
• Service or on-site.
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 15
Power Load Forecasting
• Use configurable calendar.
• Combination of several NWP sources via MetFor.
Energy forecast solutions
• Quantile regression and scenario generation possible.
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 16
Electricity price forecasting
• Specialized forecasts.
• Developed on a per market / region basis.
• Currently we have solutions for DK (spot prices and imbalance unit costs) and UK (N2Ex auction prices).
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 17
User interfaces
• Client-specific data interchange (SOAP, XML, …)
• Highly configurable HTTPS based graphical user interface, supporting access level restrictions.
• Plot data also available as Excel file download.
Energy forecast solutions
• FTP / SFTP file up- and down-loads with retries and book-keeping.
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 18
Security of supply
• Several NWP providers.
• Servers in different data centres.
• Automatic monitoring of server loads, (input) data communication, and forecast delivery.
• Monitoring of forecast performance.
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 19
Data security
• Firewall only open for client IPs.
• Client data separated via standard LINUX user-level security.
• Clients can only log in via FTP/SFTP or HTTPS, with data separation on login level.
• Encrypted hard disks / servers placed in safes.
Energy forecast solutions
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ENFOR
Henrik Aalborg Nielsen, ENFOR A/S 20
An experimental interface
Heat load forecast web-service available as https://<server>.enfor.dk/press-service/<user>.
Energy forecast solutions
Upload measurements
Download forecasts
Meteorological forecasts handled automatically by the web-service