In order to protect the landscape and the local area, Global Infrastructure and Networks uses specific strategies to mitigate the environmental impacts of the construction of new networks and the modernization of existing ones. The cabling ratio is the ratio (in percentage) between the length of the cable lines and the total length of the lines.It gives an immediate indication of the mitigation of the environmental impact of power lines.
The increase in this index over time is due to an increase in the length of the overhead and underground cable line to the detriment of bare conductors, with benefits in terms of neta work resilience, restriction of vegetation cutting and drastic reduction in the risk of electrocution for bird life.
In 2018 the cabling ratio decreased compared to the previous year, settling at 60%, due to the effect of the Brazil distribution company Enel Distribuição Goiás joining the perimeter in February 2017. The inclusion of the Brazilian company, with a network of over 215,000 kilometers and with specifications different from those of the Enel network present on the territory, has in large part contributed to the drop in the value in 2018.
This percentage is in line with the target to reach 63% by 2020.
The reduction in grid losses is guaranteed by means of operations that contribute to reducing CO2 emissions. These actions are directed at the plants and aim, for example, to progressively reduce monophase electric lines, to build new electric lines that will reduce the load on existing lines, to make use of transformers with low losses. Other actions include boosting the grid by using conductors with a greater cross-section and rephasing primary transformer substations.
Finally, the creation of new transformer substations helps reduce the length of lower-voltage lines, which are characterized by greater losses.
Generally speaking, the optimization of grid assets produces a significant reduction in grid losses.
Fuel deposit and movement
Storage tanks for liquid fuels (oil and diesel with associated pipelines) and solid tanks (coal and lignite depots located in dedicated ports) are monitored with regard to the use of resources, the consumption of electricity and the production of emissions (air quality), wastewater and waste.
Starting in 2013, in compliance with the new framework applicable from 2015 defined by the GRI, the Enel Group began reporting the main environmental performance indicators connected to construction site activities. This category includes activities of various types and scales: from the distribution area’s yards to sites pertaining to thermal plants or the construction of new renewable hydroelectric, wind, solar, geothermal or biomass plants. Activities have changed considerably over the years in view of the environmental aspects directly managed by the Group. Starting in 2016, reporting was carried out according to neta new sustainable construction site model and the principles of the “circular economy” as it applied to all existing sites.
An example of a sustainable construction site is Wayra I, in Peru, which called for both the measurement of the social and environmental impact of the wind power plant and for projects that would encourage the rational use of resources, including a waste recycling project that reused the wood pallets from the work site for the production of environmentally-friendly furniture.