One of the major goals of the Terrassa Energía Inteligente (TEI) project, promoted by the city council in recent years, has been to promote energy savings and the reduction of CO₂ emissions in the atmosphere through, among other measures, the renovation of public lighting. This great challenge, which has now been completed, involved updating the approximately 29,000 streetlights in Terrassa. Challenge achieved.

The new lights, with LED technology, represent a huge reduction in energy consumption and polluting emissions, in addition to the consequent economic savings and improvements in light quality in the city, such as the existence of fewer dark spots that improve safety and mobility, and the fact that the light is more health-friendly.

Total number of streetlights in the city

An important part of any project, once the implementation has been carried out, is the follow-up. As the TEI is basically an energy project, it was necessary that the means to carry out this monitoring were contemplated within the project itself.

On the one hand, it was necessary to expand the municipal data network to build a backbone infrastructure that, in addition to allowing data to be obtained from the equipment installed for this project, would reach more parts of the city and prepare it for the Internet of Things (IOT). On the other hand, it was necessary to update the public lighting platform, implement a management and monitoring platform for public lighting and an energy information system.

These requirements make it possible to obtain the information needed to make decisions, such as adjusting the hired power to that which is really necessary or detecting possible incidents in the lighting network (due to unusual consumption, either due to over- or under-consumption).

As an exercise of transparency and as a citizen tool, the City Council of Terrassa has launched an interactive map of lighting in the city where all the information related to public lighting is reflected. This map is continuously improving with the incorporation of new data.

Stree tlighting elements

Information on street lighting elements

In the map we can see the information related to the street lighting elements, which are basically the streetlights (with their supports) and the control panels that control the streetlights, all with their location on the city map.

Each element has associated information that is accessible by simply clicking on the desired element.

Information on Street lighting elements

The main data associated with each element are:

Control panels: control panel identifier, type of control panel, number of electrical lines controlled by the control panel, number of supports (with streetlights) associated with the control panel, and the power of the control panel in watts. It also provides information on savings, which will be discussed later.

Streetlights: identifiers of the streetlight, of the control panel to which it is connected and of the line that feeds it; types and characteristics of the supports and streetlights, including the datasheets of these elements (consumption, heights, etc.)

Measuring savings

A very relevant part of this project was to achieve significant energy savings and a significant decrease in CO₂ emissions into the atmosphere. To calculate the changes in these two magnitudes, the total base consumption before the change of streetlights was determined, which we call baseline, and which has as reference period the consumption data obtained between March 2018 and February 2019 .

With this data as a starting point and with the monitoring systems implemented for the project, we can offer savings data for each control panel.


With this data as a starting point and with the monitoring systems implemented for the project, we can offer savings data for each control panel.

Savings information measured on a control panel

The information regarding savings is shown in the tab of each control panel, calculated on a monthly, quarterly and annual basis. The values reported are:

– percentage savings: baseline vs. actual consumption after streetlight replacement.

– baseline value: value measured in the baseline period for the control panel

– consumption of the control panel

– savings in kWh

– tons of CO₂ no longer emitted into the atmosphere

Incidents in the lighting network

Another functionality offered by the platform is the visualization of active incidents related to public lighting elements, which can be received from different sources:

  • through the mobile application Cuidem Terrassa, where you can report on the city’s equipment affected (available on Google Play Store and App Store)
  • by telephone, by calling 900 877 067
  • through the inspections carried out by the maintenance services
Incident information

In the viewer it is possible to select the incidents to know their typology and which elements are affected, as well as their location in the city.

All this information, collected periodically through monitoring systems and made visible to all citizens, allows facility managers to be aware of network problems, to plan corrective, preventive or improvement actions, and ensure that lighting is operating in accordance with the desired energy saving parameters in a sustainable city.

Categories: Smart energy

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