The Research and Development project entitled SPADI: Predictive system of dynamic ampacity in aero-subterranean lines is an initiative that, based on the experience and knowledge acquired in its predecessor project DYNELEC, aims to address 5 fundamental challenges for the achievement of a comprehensive predictive system of dynamic calibration in complex electrical distribution networks: — Analysis of the applicability of the concept of dynamic calibration to underground cables, current bottlenecks and limiting elements for the dynamic operation of distribution networks with aero-subterranean sections. — Research in modeling and simulation (electric and thermal) of underground distribution cables, which allow to determine the behavior of the asset under different environmental and operating conditions and, therefore, establish new limits of ampacity against the conservative static limits imposed by the norm. — Study and implementation of meteorological prediction algorithms that allow short-term ampacity estimates, enabling an operation of the network and optimised circulating energy with maximum renewable integration. — Development and piloting of new measuring equipment and sensors that allow to feed the models with the information necessary for an accurate representation of reality, as well as to monitor the impact of the new operation techniques on the insulating properties of the cables. — Analysis, development and implementation of an information system capable of collecting all the variables and contour conditions that determine the state and operating limits of the distribution network, for decision-making in real time with the greatest knowledge of both the current and future state. In order to cover the resolution of these identified challenges, the SPADI project proposal is presented, in line with the objectives of the State R&D & I Program oriented to the challenges of the Society. The proposal presented here constitutes a technological development in both software and hardware, which involves the implementation of an information and communication system that will allow the integration of new sensory and monitoring technology, as well as innovative forecasting models for the active and optimised operation of the distribution network. Since this system will lead to the maximisation of renewable integration on the grid and, therefore, converge towards the achievement of a sustainable energy system from a triple economic, environmental and security perspective, we can affirm that this project will be a facilitator element of the Intelligent Electric Network (File X of the challenge in Safe, Efficient and Clean Energy). This R & D project will be implemented by a consortium formed by a large company in the electricity sector, E.ON Distribución S.L., which will contribute its extensive experience in the operation of the network; two innovative medium-sized enterprises, Lumiker and CIC, leading in the development of new monitoring technologies and their ICT integration; and two research centers of recognised international prestige, Tecnalia and the University of Cantabria (through the Advanced Electro-Energy Technology Group — GTEA), which will provide the research profile in such a way as to guarantee the transfer of knowledge and technology. The project will last 30 months, starting on July 1, 2015 and ending on December 31, 2017, with the global budget of 1.48 million euros. Through the development of the SPADI project and the achievement of the objectives that have been established, it is intended to obtain an increase in the competitiveness of the electricity sector, the national socio-economic interest, an environmental benefit and the promotion of cooperation between scientific technological agents.