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Orchestra: an innovative model

Orchestra is the innovative product for the prediction of hourly energy production up to 36 hours in advance. It can currently be applied to both wind and photovoltaic power plants. Orchestra takes its name from the innovative architecture of its artificial intelligence model: it uses a multitude of sub-models (the 'musicians' of Orchestra) that provide preliminary estimates of the amount of energy produced to a neural network (the 'director' of Orchestra) that harmonizes them and produces the final estimate. Selecting the best combination of musicians (among autoregressive, meteorological and artificial intelligence models) and the conductor architecture took years of development, but finally led to results unmatched in the marketplace.
Input variables
Weather variables
Energy production
Orchestral conductor
Physical models
Statistical models
Proprietary artificial intelligence
Energy production estimates

The power of Omnienergy's predictions

The higher quality of Orchestra's model predictions is evident from the graph below, which compares Orchestra's root mean squared error (RMSE) and normalized mean absolute error (NMAE)  with those of one of its main competitors, for the same historical period, on a photovoltaic plant:
As the graph shows, Orchestra's 1- to 12-hour (t+1, t+12) forecasts result in errors that are at least two times smaller not only than the competitor's predictions, but also than its real-time (t+0) production estimates, which should be particularly accurate.
What we do



Gli errori nelle stime predittive sono più che dimezzati rispetto ai principali competitor di mercato, valutati tramite NMAE (Normalized Mean Absolute Error) rispetto alla potenza nominale e RMSE (Root Mean Squared Error).


Intraday (MI)

Omnienergy si differenzia dai competitor per l’attenzione alle previsioni energetiche nel Mercato Intraday (MI), offrendo orizzonti di previsione che vanno da 1 a 12 ore con un costante aggiornamento orario.

The musicians

At each forecast horizon (12 horizons for the Intraday Market, 24 for the Day-Ahead Market), the Conductor evaluates the forecast quality of the underlying models and dynamically assigns the weight of their contributions. Each musician belongs to one of the following types:
  1. weather models, based on the physical link between weather state and energy production
  2. autoregressive models, which estimate future energy production from past energy production
  3. artificial intelligence models, selected and developed by Omnienergy to extract energy production from a variety of variables

The importance of the Orchestra Conductor

Each musician in the Orchestra performs well in some scenarios (i.e., for certain facilities, times of day, and weather conditions) and less well in others. The Orchestra Conductor knows the strengths and weaknesses of each musician and can harmonize their predictions by drawing the best out of each. The chart below shows an example of this fact: individual musicians provide good estimates, but often some musicians overestimate energy production while others underestimate it. Orchestra manages to mediate these conflicting positions and produces the most accurate estimate.
What we do
Example of effective energy production (kwh) and predicted by Orchestra (orchestra) and its musicians (M1 to M6). While individual musicians frequently tend to overestimate or underestimate energy production, Orchestra averages their opinions by producing a better estimate than those of individual musicians.

The evaluation indicators of the model

To evaluate the performance of the Orchestra model, we chose to measure two key performance indicators (KPIs): NMAE (Normalized Mean Absolute Error) and RMSE (Root Mean Squared Error).The NMAE indicator allows the quantification of the average percentage error of Orchestra with respect to the maximum power output of the considered plant (rated power).The RMSE metric, on the other hand, allows quantification of the absolute difference between the output predicted by the model and the actual output: larger errors have a greater proportional impact on the RMSE indicator.
What we do
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