This page shows daily plots of forecast grid data for onshore wind energy in Belgium, year 2013. 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.

onshore	2013	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Monitored capacity (GWpeak)	0.88	0.74	0.74	0.73	0.74	0.92	0.95	0.95	0.95	0.99	1.0	1.0	1.0
Cumulative energy (GWh)	1799	152	300	452	608	745	877	957	1014	1099	1307	1499	1799
Monthly energy (GWh)	1799	152	148	152	156	137	133	79.7	56.8	85.5	208	192	301
Normalized cumulative sum (kWh/kWpeak)	2046	207	408	615	827	976	1115	1199	1258	1344	1553	1745	2046
Normalized monthly energy (kWh/kWpeak)	2046	207	201	207	212	149	139	83.6	59.7	86.0	208	192	302
Normalized cumulative distribution [%]	100 %	10.1 %	19.9 %	30.0 %	40.4 %	47.7 %	54.5 %	58.6 %	61.5 %	65.7 %	75.9 %	85.3 %	100 %
Normalized monthly distribution [%]	100 %	10.1 %	9.83 %	10.1 %	10.4 %	7.27 %	6.8 %	4.09 %	2.92 %	4.2 %	10.2 %	9.39 %	14.7 %
Capacity factor [%]	23.4 %	27.8 %	29.9 %	27.8 %	29.5 %	20.0 %	19.3 %	11.2 %	8.02 %	11.9 %	28.0 %	26.7 %	40.5 %

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 onshore 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.