Baseline Calculation

The Baseline Calculator feature of FactoryTalk Energy Manager aims to facilitate energy conservation efforts through accurate baseline calculation using regression analysis. This enables the users to establish baselines, forecast energy consumption, and assess the effectiveness of energy conservation measures.

Perform the following steps to carry out the baseline calculation for a model:

From the left navigation panel, click the [

] icon.

Select the desired model from the

Model Name

list.

NOTE:

If no model is already available, click

Add Model

Select the

Baseline Start Date

and

Baseline End Date

using the date picker.

NOTE:

Users selects the start and end date of the baseline calculation period. This date range decides how much data will be used for the baseline model training and formula creation. The meters selected in the previous step may have data from previous and future times than the selected date range, but the selection of the range narrows down the data to be used for calculations.

Select the

Granularity

Day/Month

from the drop-down list.

NOTE:

The

Granularity

option decides the resolution of data within the selected date range.

For example, if date range is 01-Jan-2024 to 31-Mar-2024.

When granularity=Day, 90 observations will be used during baseline calculation.

When granularity=Month, three observations will be used during baseline calculation.

Select the

Dependent Variable Y

and

Independent Variable(s) Xn

NOTE:

Users can select meters that are already present in the FactoryTalk Energy Manager energy model as

Independent Variables

and

Dependent Variable

which will internally select the timeseries tagged to these meters.

Resource Meter

under same site as the selected model, can be selected as the

Dependent Variable Y

Independent Variable(s) Xn

is the

Process value meter/Production meter

under the same site.

All the other meters are disabled.

Click

Save

Click

Calculate

and the

Correlation

chart along with the

Regression Statistics

is displayed.

NOTE:

The equation for a straight line is y = mx + c or, in case of energy consumption driven by output: Energy = (Slope x Output) + Intercept

In this equation, the intercept represents the energy consumption as output trends toward zero (the baseload) and the slope represents the incremental energy consumed per unit of output.

A high baseload can indicate significant potential for energy savings by investigating on why so much energy is consumed even when production trends towards zero.

On clicking the

Regression Analysis

tab, User can view the Expected vs Actual graph.

Re-calculate with Changed Configurations

The Baseline calculator provides features to quickly change a model’s configurations and submit a re-calculation. Upon receiving an error message with the provided configurations, users can edit the model and change the configurations based on the guidance provided earlier. Then submit the model re-calculation to generate a new baseline analysis.

NOTE:

On recalculating the baseline analysis, regression analysis does not change unless the model changes are saved.

NOTE:

If the underlying data quality has been validated but the baseline calculation is still showing error, please submit a ticket for further analysis.

Analytics

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