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ECN publication
CRISP - Distributed Network Architectures D1.7
Andrieu, C.; Fontela, Miguel; Enacheanu, B.; Pham, H.; Raison, B.; Besanger, Y.; Randrup, M.; Nilsson, U.B.; Kamphuis, I.G.; Schaeffer, G.J.
Published by: Publication date:
ECN Energy in the Built Environment 14-9-2007
ECN report number: Document type:
ECN-O--07-020 Other
Number of pages: Full text:
73 Download PDF  

This document summarises a possible evolution of the merge of ICT network and EPS in the scope of a future electrical architecture. A general overview on several aspects of the transmission and the distribution networks (technical operation, trading, securing, defence plan) and on several aspects of ICT improvement and risks has been given in previous work packages of the part I of the CRISP project. This document brings a common point of view between the partners on this future merge of the various domains involved. The approach is based on the study of given application based on chosen cases, trying then to show a more general view on the whole system. The MV network, including of course the main HV/MV substation, has a specific position in our purpose: historical, technical and trading boundary between the transmission and the distribution system, involving new functions in the context of a future massive and dispersed generation. The whole electrical system is not yet ready to work properly (supply performances maintained at the same level) with a lot of DG and DG-RES and at the same time with a new and complete electrical deregulated market. The multiplication of actors (production, transmission, distribution, customers, local networks) led by the rules of deregulation is an additional issue for planning and operating correctly the network in the long term. The interactions expected between the low level of the network (distribution EPS, VPP, customers, small aggregators) and the high level of the network (transmission EPS, large plants, LSVPP, large aggregators) require to structure the system in different integrated levels, allowing the operators at each stage to manage efficiently the power flux for steady-state, transients and temporary electrical variations. Compared with the present SCADA situation, the ICT will allow the needed information to be shared by various tools and actors at various locations, and will allow the local intelligence to be developed in depth. Hardware, software and communication protocols are converging nowadays for some EPS applications through numerous IEC and IEEE standards development. Recent re-regulation of the power industry sector and the expected massive increase of the proportion of renewable energy generators will lead to an increased level of automation of lower nodes in the power network with increased market exposure. During the last decade, numerous international projects target to standardize communication protocols and information exchanges between electrical products. The problem is not only to identify the right parameters, associated values and names, but also to meet the time frame requirements of the various applications needed. When dealing with real time operation (time response depending also of the given operating application), depending on the information nodes number and a lot of communication factors, the coherent development of a solution involves a “think-together” approach. Distributing and paralleling the analyses and data conversion allows the information system to meet the best time performance for a given application, enabling or not finally the real application in the EPS. A future possible application is to make contribute the DG to specific power system support (parts of ancillary services traditionally defined for large plants connected to the transmission system).

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