Tendencias en RI

Solar Siesta: Photovoltaic Generation and the Great American Eclipse

Human observers within the narrow band of total eclipse on August 21, 2017 were treated to a dramatic experience of light and dark. In contrast to the human experience, photovoltaic (PV) generators responded to the gradual changes in light intensity both in the band of “totality” and across the much broader region of partial eclipse, as recorded by researchers and monitors across North America. During the eclipse:

  • Direct and diffuse sunlight decreased proportional to the blocking of the sun by the moon. Unlike moving clouds, the eclipse affected sunlight throughout the sky.
  • Unlike partly cloudy days, PV power output was reduced to zero (or near zero) during the eclipse.
  • PV arrays’ output ramped up and down during the eclipse at about 1.0–1.3% per minute, more slowly than moving clouds (8–9% per minute) and more rapidly than sunset (0.4% per minute).
  • PV systems with 99% or less eclipse coverage remained connected to the grid. Two monitored PV systems shut down for a few minutes during the event.
  • Delivered energy from PV plants on the day of the eclipse was down 8–17% relative to days with similar weather.
  • On a few distribution circuits in areas with partial eclipses, the eclipse coincided with a short period of increased demand from the grid, due to reduced generation locally.


Analysis of the business case for the ZERO-PLUS technologies and processes

The business case analysis in the present report is the second stage of support to companies planning to exploit the ZERO-PLUS project outputs to expand their participation in this market, following the first stage in which a market analysis was performed. The business case involves a settlement that meets the three ZERO-PLUS performance criteria of reduced energy consumption, increase in renewable energy production and reduced initial cost. A number of options for the business case were initially identified and a preliminary assessment made of the chief characteristics of these options. Based on an estimate of the fit of each option with the nature of the ZERO-PLUS project, the case for change and the strategic landscape, a short list of options was selected for further analysis. The option analysis looked at the benefits, costs, risks and deliverability (implementation time) of each of the four final options.



Estudio de acceso, uso y retos de las TIC en Colombia

La primera Gran Encuesta TIC tiene como objetivo articular esfuerzos estadísticos históricamente dispersos en diversas investigaciones, con el fin de permitirle al país contar con un referente unificado de información para los principales indicadores sectoriales producidos desde el Ministerio TIC.


Securing Cyber Assets: Addressing Urgent Cyber Threats to Critical Infrastructure

Our review of hundreds of studies and interviews with 38 cyber and industry experts revealed an echo chamber, loudly reverberating what needs to be done to secure critical U.S. infrastructure against aggressive and targeted cyber attacks. Cyber is the sole arena where private companies are the front line of defense in a nation-state attack on U.S. infrastructure. When a cyber attack can deliver the same damage or consequences as a kinetic attack, it requires national leadership and close coordination of our collective
resources, capabilities, and authorities.


Valorisation socio-économique des réseaux électriques intelligents

L’expertise forte en termes d’analyse socioéconomique des bénéfices des solutions smart grids, ainsi que les méthodes et outils développés par les gestionnaires de réseau de transport et de distribution français, leur ont permis d’apporter des réponses nouvelles auxquelles les études existantes en France ou en Europe ne répondaient pas à ce jour. 

La valeur économique des réseaux électriques intelligents justifie le déploiement de l’ensemble des solutions étudiées à court ou moyen terme en France métropolitaine.