How should the value of the total volume displayed at the top of the graph be interpreted?
The value shown at the top of the graph represents the total imbalance volume for all quarter-hour periods, expressed in absolute MWh and converted to an hourly amount by dividing by 4.
In the global imbalance graph, what do the stacked bars refer to?
The global imbalance graph shows stacked bars, each bar representing the volume of global imbalance expressed in Kwh on a quarter-hour basis.
The amount can be negative, indicating that the energy entering the BRP’s balance perimeter is less than the energy leaving it.
How can I interpret colors on the graph?
You will notice that different colors can appear on the graph. Each color represents the notion of a quality factor, being the indication on the quality of the metered data, and as a result, how trustworthy the measured data is:
Validated (V): All metered data is valid and unlikely to change any further.
Non-Validated (NV): One of the measurements of this imbalance was flagged as incorrect at the moment of metering (communication failure, inconsistency, time of publication of components – for more information see our FAQ on component availability). This value will be subject to a thorough validation process that will check this value and correct it before settlement.
Corrected (C): At least one of the metered values used in the process was found to be incorrect or unreliable and has been reviewed and replaced - either automatically or manually - with a more consistent value. This correction ensures that the data is as accurate as possible.
How should the percentages be interpreted that appear on hovering over a bar?
When hovering over a bar in the graph, a small modal appears giving the exact imbalance in MWh displayed by the bar as well as percentages of the quality factors.
The percentage assigned to each quality factor is calculated from the mere count of imbalance components with that factor compared to the total number of components used to compute the global imbalance.
Using examples, we would have the following:
- If 3 out of 11 imbalance components have a ‘Corrected’ status, then 27% will be shown as “Validated” on the bar.
- If 7 out of 11 imbalance components have a ‘Validated’ status, then 64% will be shown as “Validated” on the bar.
- If 1 out of 11 imbalance components have a ‘Non-Validated’ status, then 9% will be shown as “Validated” on the bar.