This page shows daily plots of forecast grid data for offshore wind energy in Belgium, year 2019. 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	2019	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	1.40	1.18	1.18	1.18	1.18	1.4	1.53	1.55	1.55	1.55	1.55	1.55	1.55
Cumulative energy (GWh)	4645	412	719	1167	1414	1666	1978	2221	2614	3068	3585	4029	4645
Monthly energy (GWh)	4645	412	307	448	247	252	312	243	393	454	517	445	616
Normalized cumulative sum (kWh/kWpeak)	3307	350	610	990	1200	1381	1584	1741	1995	2288	2622	2909	3307
Normalized monthly energy (kWh/kWpeak)	3307	350	261	380	210	181	203	157	254	293	334	287	398
Normalized cumulative distribution [%]	100 %	10.6 %	18.5 %	30.0 %	36.3 %	41.7 %	47.9 %	52.6 %	60.3 %	69.2 %	79.3 %	88.0 %	100 %
Normalized monthly distribution [%]	100 %	10.6 %	7.89 %	11.5 %	6.34 %	5.46 %	6.15 %	4.74 %	7.68 %	8.87 %	10.1 %	8.68 %	12.0 %
Capacity factor [%]	37.7 %	47.0 %	38.8 %	51.1 %	29.1 %	24.3 %	28.2 %	21.1 %	34.1 %	40.7 %	44.8 %	39.9 %	53.5 %

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.