FIRST PORTUGUESE STREETLIGHT SMARTGRID COMPLETES ONE YEAR OF OPERATION
In 2010, EDP, the Portuguese national utility, unveiled the InovCity concept. This new way of thinking about electricity generation and distribution was introduced in Évora, a World Heritage City celebrating the centenary of its electrification.
As part of this project, Arquiled was invited to develop an innovative and more efficient adaptive street lighting solution, to work integrated in the global network management system, replacing street lights in the historic city centre with LED technology luminaires. d distribution was introduced in Évora, a World Heritage City celebrating the centenary of its electrification.
The luminaires installed were of the Arquihistoric model, which is aesthetically equal to the existing lanterns, but concentrates inside a set of sensors that, together with the LED technology and the centralized management system, allow for an intelligent behavior of the street lights, an increase in energy efficiency and the possibility of integrating the intelligent street lights with the existing traditional street lights. The global network management also allows definition of new and more effective assets management processes.
This emerging lighting technology, coupled with widespread communication networks and artificial intelligence, will provide support for new light management automatisms which enable a more balanced use of electrical energy, in what regards energy efficiency, security and comfort, without compromising functionality.
The Arquihistoric models are equipped with 48 Osram Golden Dragon Plus LEDs, with a total consumption of approximately 67 Watts, replacing the existing 150 Watts High Pressure Sodium lamps. The Arquihistoric units include Arquiled’s Thermal Sensor, which measures temperature and protects the technology in case of malfunction, Sun Sensor (also supplied by Osram Opto Semiconductors), which regulates output depending on the ambient light, Tractus Sensor, which regulates output depending on the vehicle and pedestrian activity in the surroundings, G-Sensor,
which measures the verticality of the units and is able to warn about accidents or strong winds, and Arquiled’s PLC communication system, which allows for a real time centralized management of all the street lights in the city centre.
The units were installed at the beginning of November 2010 and have now reached the end of the first year of operation with excellent results.
Along with the energy savings, the existence of an intelligent grid has allowed the Municipality and the Utility to gain a better knowledge of the street light usage, improving service and maintenance activities. Data collected by the system has shown significant savings in pedestrian residential areas between 00:00h and 07:00h. In the main city plaza, the data collected confirmed a reduction in traffic during dinner time (between 21:30h and 23:30h) and an increase between 23:30h and 02:00h caused by the cultural night activities, typical of the plaza. Comparing a typical month’s consumption before and after the change, shows a reduction from 2451 kWh/month to 726 kWh/month, a decrease of around 70%.
The Municipality has also made use of the system capabilities, as an example, during a recent street cinema festival, a new operating profile was remotely uploaded to the Arquihistoric units, and street light working periods were automatically adjusted in order to adapt to film projection schedules.
According to Francisco Mira, Technology and Innovation Manager at EDP Distribuição "this Project shows that LEDs are a viable alternative for street lighting and the technology has the potential to address the specific needs of the utilities, citizens and municipalities".
About Arquiled: Arquiled was established in 2005, stimulated by the development of technical solutions for Casino Lisboa. The company develops lighting solutions based on SSL technology, in which incorporates layers of intelligence that allow the maximization of energy efficiency. Arquiled is currently present in several markets, from architectural to automotive lighting, with a growing geographical distribution.
Thermal management engineering, Heatsink engineering and manufacturing
LED Power suppliers/drivers, Electronics and control engineering
Project consulting / LED solutions