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Madrid, Spain

Red Eléctrica de España is a partly state-owned and public limited Spanish corporation which operates the national electricity grid in Spain, where it operates the national power transmission system. It also holds assets in Portugal, Peru and Bolivia. Wikipedia.

Agency: Cordis | Branch: FP7 | Program: CP-IP | Phase: ENERGY-2007-7.2-01 | Award Amount: 13.59M | Year: 2008

PEGASE is a four year project dealing with the High and Extra High Voltage transmission and sub-transmission networks in Europe (designated as ETN) and implemented by a Consortium composed of 20 Partners including TSOs, expert companies and leading research centres in power system analysis and applied mathematics. Its overall objectives are to define the most appropriate state estimation, optimization and simulation frameworks, their performance and dataflow requirements to achieve an integrated security analysis and control of the ETN. The heart of the PEGASE project will involve advanced algorithmic, build prototypes of software and demonstrate the feasibility of real-time state estimation (SE), multi purpose constrained optimization (OPF) and time domain simulation of very large model representative of the ETN, taking into account its operation by multiple TSOs. Project R&D ambitions: The first ambition is to relieve all knowledge barriers to provide all TSOs with a synchronous display of the state of the ETN, very close to real time (typically each 5-10 seconds). The second ambition is to develop OPF programs determining realistic system operating points that include TSO operating rules but also optimal preventive or corrective actions, typically for real-time congestion management. The third ambition is to improve the existing state of the art technology in time simulation of very large system to permit: i/ off-line studies of the ETN including possibly interconnections with neighboring systems (i.e. Russia), ii/ dispatcher training simulation iii/ preventive security assessment and in on-line emergency conditions, faster than real-time simulation opening new perspectives for an anticipative control of the system. Project expected impacts: The availability of duly tested prototypes will allow for a quick implementation of the developed tools in a central facility and in existing computing environments. A better management of crisis will allow decreasing conservative security margins and improving the identification of real risks. Operating with higher power flows and closer to real available transfer capacities determined more transparently from the shared real-time model will enhance the cross-border electricity market. Eventually, the first European dispatcher training simulator will be at arm length for use in a European training center allowing the simultaneous training of dispatchers from several countries that is the cornerstone of the integrated operation of the ETN.

Agency: Cordis | Branch: FP7 | Program: CP | Phase: ENERGY.2008.7.2.3 | Award Amount: 4.14M | Year: 2009

Five Transmission System Operators (Belgium, France, Germany and Spain) together with seven RTD performers propose a 3 year research and demonstration project to compare pros and cons of new market designs aiming at the integration of massive intermittent energy sources dispersed in several regional power markets. Under the technical coordination of RTE, they will implement a novel network/system/market modelling approach to provide the consortium with an open simulation platform able to exhibit the comparative benefits of several market design options. Such options may originate either from anyone of the four studied markets or from partners that have already worked for the UK or Danish electric systems. Market participants and TSO are players of such a simulation: each area is represented by aggregated realistic data over one year and system security rules are fulfilled at any time. The demonstration tasks require data with appropriate non disclosure agreements, in order to address first the market behaviour of fully rational players, and next the impact of non optimal behaviours, using agent modelling. Results will be compared (possibly ranked) before being packaged and presented to the TSO community and regulatory authorities for analysis of the platform potential and trustworthiness of the simulation results. This demonstration will be complemented by intensive dissemination activities towards the TSO community within EU27 and beyond, with dedicated trainings to accompany the take-up of the simulation platform. An exploitation agreement is proposed to further improve and expand the platform within the pan European TSO community, beyond the end of this project. Such a platform will help developing technical and regulatory solutions compatible with a virtual single European Grid and regional network management processes by assessing, through combined network and market modelling, the expected outputs of new market designs in support of the 2020 EU27 targets.

Padron S.,University of Las Palmas de Gran Canaria | Medina J.F.,University of Las Palmas de Gran Canaria | Rodriguez A.,Red Electrica de Espana
Energy | Year: 2011

A significant number of islands have been forced to restrict the penetration level of renewable energy sources (RES) in their conventional electrical power systems. These limitations attempt to prevent problems that might affect the stability and security of the electrical system. Restrictions that may apply to the penetration of wind energy can also be an obstacle when meeting European Union renewable energy objectives. As a partial solution to the problem, this paper proposes the installation of a properly managed, wind-powered, pumped hydro energy storage system (PHES) on the island of Gran Canaria (Canary Islands). Results from a dynamic model of the island's power system show that the installation of a pumped storage system is fully supported in all circumstances. They also show that the level of wind penetration in the network can be increased. These results have been obtained assuming that two of the largest existing reservoirs on the island (with a difference in altitude of 281 m and a capacity of aprox. 5,000,000 m 3 each) are used as storage reservoirs with three 54 MW generators. Likewise, the ability of such facilities to contribute to the stability of the system is shown. This type of installation can reduce fossil fuel consumption, reducing CO 2 emissions. Moreover, not only can the PHES improve wind penetration level, but it also allows the number of wind farms installed to be increased. Regions with geographically suitable sites and energy problems similar to those on the Canary Islands are encouraged to analyze the technical and economic feasibility of installing similar power systems to the one in this paper. Such systems have an enormous, unexplored potential within the general guiding framework of policies promoting clean, renewable energy. © 2011 Elsevier Ltd.

Marcos J.,Public University of Navarra | Marroyo L.,Public University of Navarra | Lorenzo E.,Technical University of Madrid | Alvira D.,Red Electrica de Espana | Izco E.,Acciona
Progress in Photovoltaics: Research and Applications | Year: 2011

The variable nature of the irradiance can produce significant fluctuations in the power generated by large grid-connected photovoltaic (PV) plants. Experimental 1 s data were collected throughout a year from six PV plants, 18 MWp in total. Then, the dependence of short (below 10 min) power fluctuation on PV plant size has been investigated. The analysis focuses on the study of fluctuation frequency as well as the maximum fluctuation value registered. An analytic model able to describe the frequency of a given fluctuation for a certain day is proposed. © 2010 John Wiley & Sons, Ltd.

After the good results obtained from an assessment of geomagnetically induced currents (GICs) in a relatively small subset of the Spanish power transmission network, we now present the first attempt to assess vulnerability across the entire Spanish system. At this stage, we have only included the power grid at the voltage level of 400 kV, which contains 173 substations along with their corresponding single or multiple transformers and almost 300 transmission lines; this type of analysis could be extended to include the 220-kV grid, and even the 110-kV lines, if more detailed information becomes available. The geoelectric field that drives the GICs can be derived with the assumption of plane wave geomagnetic variations and a homogeneous or layered conductivity structure. To assess the maximum expected GICs in each transformer as a consequence of extreme geomagnetic storms, a post-event analysis of data from the Ebre Geomagnetic Observatory (EBR) during the 2003 Halloween storm was performed, although other episodes coincident with very abrupt storm onsets, which have proven to be more hazardous at these mid-latitudes, were analyzed as well. Preferred geomagnetic/geoelectric field directions in which the maximum GICs occur are automatically given from the grid model. In addition, EBR digital geomagnetic data were used to infer statistical occurrence probability values and derive the GIC risk at 100-year or 200-year return period scenarios. Comparisons with GIC measurements at one of the transformers allowed us to evaluate the model uncertainties. © 2014 Torta et al.; licensee Springer.

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