STC's software can automatically detect unusual patterns of energy consumption in half-hourly profile data and issue alerts allowing action to be taken. The system has three stages:
- Analysing data to produce appropriate profile targets
- Monitoring consumption against target and detecting exceptions
- Issuing profile alerts
Creating Profile Targets
The system analyses historical profile data for each meter and produces a model of energy consumption for each possible combination of month and weekday; i.e. a model half-hourly profile shape for ‘Mondays in January’, ‘Wednesdays in May’ and so on. Public holidays are also modelled. These models are mapped against the calendar for the forthcoming year to create an appropriate profile target.
Monitoring Against Target and Detecting Exceptions
Consumption for each meter is monitored daily and where it is above target i.e. outside of tolerance, exception alerts are automatically generated. The tolerance threshold is fully customisable.
Issuing Profile Alerts
Where exceptional consumption is detected, an automatic profile alert will be generated and emailed to an appropriate person either on site or an appropriate manager. Alert emails can be as recent as Day+1 or as data is available. This allows a rapid response to any significant deviation or overuse.
Example energy issues identified by the Profile Alerts system:
Lighting left on outside of operating hours
Storage heaters left on after the end of the heating season
Spikes indicating electric immersion heaters running outside of the Economy 7 period
Interpretation and Follow-Up
Where unexplained exceptional consumption occurs, STC staff can assist with interpretation of the pattern and advise on suitable action.
Invoice Data-Based Targeting
This service involves checking utility invoice consumption data against target on a monthly basis. STC will set targets for each utility meter.
The targeting system involves the following two stages:
- Target setting
- Reporting against targets
Targets are set for each individual meter using the following approach:
- Observe patterns of historical energy consumption for each meter and build a specific model of how energy consumption responds to weather or other driving factors
- Use this model to predict how much energy will be used in each month in the future, given the expected weather or other conditions
- Reduce the predictions by a percentage of the customer’s choice, e.g. 5%, to create challenging but appropriate energy targets
Reporting Against Targets
Once targets have been set and stored against each meter, STC systems offer several systems of reporting actual consumption against target:
- Actual invoiced consumption can be compared against target on a monthly basis using the Traffic Light Report
- Actual consumption is weather-corrected where appropriate, and compared with the target for each month
- Where energy consumption is significantly over or under target, the difference is highlighted red or green
It is typically claimed that an effective M&T programme can reduce consumption by about 15%.