The Significance of Energy Storage for Renewable Energy Generation and the Role of Instrumentation and Measurement

International audienceEnergy storage is not a new concept but is currently getting increasing importance in the context of energy transition paradigm. Indeed, it is expected to play a key role as an enabling technology for lowering the carbon footprint of the electric power system. In fact, the growing development of renewable energy resources and their increasing share in the energy mix, are introducing significant challenges to the existing power grid due to the high variability of these sources/loads. In particular, maintaining the generation-consumption balance of the electric power in real time, as well as the overall power system security, when these special energy sources/loads are present at a significant scale is a major concern. With competitive energy storage, it will be possible to introduce more flexibility in the electrical system thus helping it to better manage the overall energy balance with better system response in case of severe contingencies. Energy storage technologies were historically used for managing the load curve while observing generation dynamic constraints. The most well-known storage technology is the pumped hydro storage where the energy is stored in a hydraulic form (water potential energy). With the event of open access and the corresponding unbundling of electric power industry segments, valorizing energy storage options under market conditions has become tricky. The major present barriers for deploying energy storage systems (ESS) are high cost, competitive economic value, efficiency and energy density, together with energy policies. The new energy paradigm has put a new emphasis on energy storage, and many research roadmaps have pointed out the need for overcoming the current barriers. The decision makers' awareness of the importance of energy storage is also on the rise. However, adequate incentives for encouraging massive deployment of ESS and storage technology within the electric power system are still lacking. Currently, most of the effort is dedicated to in situ demonstration projects in striving for smarter grids and support of innovations with the corresponding proofs of concept and feedback experience. Additionally, different grid applications are assessed for both centralized to decentralized uses. Various energy storage applications for frequency regulation, voltage support, investment optimization, or peak shaving are under consideration. In this article, some of the main energy storage technologies will be reviewed according to their main application domains. That will be followed by a focus on battery energy storage. Some key elements of battery management system (BMS) technologies and ESS architecture and characterization will be addressed. Then some aspects of ESS protection will be presented and the key trends and indications of emerging concepts for energy storage will be identified

Quelle R&D Mener pour le Développement Des Réseaux D'énergie De Demain ? Les Propositions de L'ancre en 2015

Feuille de route sur les réseaux électriques et stockage élaborée par le GP10 Réseaux et Stockages de l'Energie de l'ANCRECette feuille de route concerne les réseaux d’énergie électrique, de chaleur et de froid, les réseaux de gaz (hydrogène, gaz naturel), leurs stockages associés, ainsi que leurs couplages à venir dans le cadre de la transition énergétique et des évolutionsqui l’accompagneront, que ce soit sur les modes de production d’énergie ou sur l’évolution des usages.Le focus est porté sur les réseaux électriques qui seront les premiers impactés par cette transition énergétique. Hormisquelques éléments très spécifiques aux réseaux électriques (et qui seront notés dans le texte par une couleur différente)il est à souligner que la quasi-totalité des considérations et axes de R&D évoqués pour les réseauxélectriques et le développement de leur « intelligence » et/ou de leur flexibilité s’appliquentégalement aux autres réseaux d’énergie. Par ailleurs, si le groupe programmatique« Réseaux et Stockage » de l’ANCRE (GP10) s’est largement appuyé sur les nombreuses feuilles de route émises tant au niveau national, dont celles de l’ADEME, qu’européen, il a également souhaité s’en démarquer en insistantlargement et en détaillant les recherches scientifiques et technologiques à mener face aux verrous actuellement identifiés

Demonstration of the benefits of an integrated and modular energy management at a city/territorial level: the Grenoble use case

International audienc

Risk aversion model of distribution network planning rules considering distributed generation curtailment

WOS:000430770600036International audienc

Assessing and comparing smart grid demonstration projects

International audienceAbstract—The increasing number of smart grid projectsthroughout the world has resulted in a large portfolio ofdemonstrators and advanced grid functions. These experimentalprojects generally aim to test and validate new solutions for thefuture electric system. This paper proposes a method to comparesmart grid demonstration projects using a dedicated evaluationindicator. Scores are attributed to experimental projects addressinga variety of elements along the electricity chain that areincluded in the smart grid concept, which combines informationand communication technology with the electric power system fora more efficient, sustainable, and economic use. The smart gridevaluation indicator is later applied to four major internationalsmart grid demonstrator

International power engineering research collaborations

This is a summary of the presentations of the panel entitled "International Power Engineering Research Collaborations" at the 2006 IEEE/PES GM in Montreal, Quebec, Canada. The panel chair George Gross and the seven panelists from different parts of the world aim to summarize the key aspects of research collaborations in various power engineering domains and across virtually all the continents. The collaborative efforts range from market mechanisms to renewable energy integration and from specific power topics to interdisciplinary projects. © 2006 IEEE.link_to_subscribed_fulltex

Standardization tests for the industrialization of grid-friendly Virtual Synchronous Generators

WOS:000563998400004International audienceThree synchronous machine models representing three precision levels (complete, reduced and static), implemented in a virtual synchronous generator (VSG)-based industrial inverter, are compared and discussed to propose a set of tests for a possible standardization of VSG-based inverters and to ensure their "grid-friendly" operation in the context of isolated microgrids. The models and their implementation in the microcontroller of an industrial inverter (with the local control) are discussed, including the usability of the implementation with large-scale developments constraints in mind. The comparison is conducted based on existing standards (for synchronous machines and diesel generators) in order to determine their needed evolution, to define the requirements for future grid-friendly inverter-based generators, notably implementing a VSG solution

Using control capabilities of DER to participate in distribution system operation

This paper introduces in a first step the capability and availability of reactive power supply by PV inverters. In a second step this potential is studied concerning its economic usability. This is done by a proposed approach of allocating additional costs to reactive power supply and assessing the benefits for network operation. Based on cost-benefitanalyses the paper presents an economic potential of using reactive power from PV inverters for distribution network operation