This page shows daily plots of forecast grid data for offshore wind energy in Belgium, year 2015. 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	2015	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71
Cumulative energy (GWh)	2571	280	474	707	855	1049	1216	1420	1558	1743	1868	2199	2571
Monthly energy (GWh)	2571	280	194	233	148	194	167	204	138	185	125	331	372
Normalized cumulative sum (kWh/kWpeak)	3610	394	666	993	1201	1473	1708	1994	2188	2447	2623	3089	3610
Normalized monthly energy (kWh/kWpeak)	3610	394	272	328	208	272	235	286	194	260	176	465	522
Normalized cumulative distribution [%]	100 %	10.9 %	18.4 %	27.5 %	33.3 %	40.8 %	47.3 %	55.2 %	60.6 %	67.8 %	72.7 %	85.6 %	100 %
Normalized monthly distribution [%]	100 %	10.9 %	7.54 %	9.07 %	5.75 %	7.54 %	6.51 %	7.92 %	5.36 %	7.2 %	4.87 %	12.9 %	14.4 %
Capacity factor [%]	41.2 %	52.9 %	40.5 %	44.1 %	28.8 %	36.6 %	32.6 %	38.4 %	26.0 %	36.1 %	23.6 %	64.6 %	70.1 %

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.