This page shows daily plots of forecast grid data for offshore wind energy in Belgium, year 2018. We use quarter hour forecast data from Elia, which is corrected with up-scaled measurement data for the monitored capacity. The monitored capacity can deviate from the installed capacity; and it can change over time. Therefore values normalized to kWh/day per kWpeak, and also hourly fluctuations are provided. In general grid forecast data is more accurate than weather re-analysis from satellite data.

offshore	2018	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	1.01	0.88	0.88	0.88	0.88	0.88	0.89	1.01	1.1	1.18	1.18	1.18	1.18
Cumulative energy (GWh)	3312	364	684	958	1159	1328	1524	1656	1856	2137	2468	2860	3312
Monthly energy (GWh)	3312	364	320	274	201	169	196	131	200	281	331	393	452
Normalized cumulative sum (kWh/kWpeak)	3282	415	780	1092	1322	1514	1734	1864	2046	2285	2565	2899	3282
Normalized monthly energy (kWh/kWpeak)	3282	415	365	313	229	193	219	130	182	238	281	333	383
Normalized cumulative distribution [%]	100 %	12.6 %	23.8 %	33.3 %	40.3 %	46.1 %	52.8 %	56.8 %	62.3 %	69.6 %	78.2 %	88.3 %	100 %
Normalized monthly distribution [%]	100 %	12.6 %	11.1 %	9.52 %	6.99 %	5.87 %	6.69 %	3.97 %	5.55 %	7.27 %	8.56 %	10.2 %	11.7 %
Capacity factor [%]	37.5 %	55.7 %	54.3 %	42.1 %	31.8 %	25.9 %	30.5 %	17.5 %	24.5 %	33.1 %	37.7 %	46.3 %	51.5 %

Average hourly data:
The plots below show hourly data, normalized to kiloWatt per installed capacity expressed in kiloWatt peak. The Elia grid data contains four data points per hour, these are averaged to represent a single hour on the plot. So the hour 14 combines data points from 14:00, 14:15, 14:30 and 14:45 for example. In the legend we display the avarage daily generated energy in kWhpeak per month. The maximum achievable energy per day is 24 kWh per kWpeak of installed capacity, since there are 24 hours in a day. Fluctuations are summarized with boxplots for the entire year and per month.

Acknowledgement: many thanks to Elia for open access to offshore wind grid data of Belgium at www.elia.be/en/grid-data. This data is licensed under the Elia Open Data License, which uses the CC BY-4.0 public license, and is governed by Belgian law.

User guide: most of the figures on this page are dynamic boxplots. A png image can be downloaded with the pop-up window at the right upper side. These functions require that javascript is enabled. Boxplots are explained here.