TWENTIES for IEEE ISGT Gothenburg 2010

TWENTIES for IEEE ISGT Gothenburg 2010 - 1 Economic and...

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1 Abstract-- In the scope of a recently launched European Research Project, a team of experts from public laboratories and TSO is in charge of defining the concepts and methodological approaches to design and analyse the technical and economic feasibility of future HVDC grids. This work aims at identifying, assessing and comparing several possible HVDC network topologies, with appropriate control and protection schemes, able to collect wind energy on large areas, transmit it at the best points to the AC grid and provide the necessary ancillary services for optimising the DC / AC interconnection in normal and disturbed conditions. The methodology adopted for the study and presented in this paper will focus on three main items: 1. identify and assess the economic drivers for the development of off-shore HVDC networks 2. identify the requirements for an optimal operation of the AC / DC interconnected power systems under normal and emergency conditions 3. conceptualise the coordinated control / command and protection plans for HVDC networks This paper gives a comprehensive view of the issues and tasks to be addressed during the run of the project. Index Terms -- off-shore wind-farms, HVDC grids, economic design, risk assessment, secure operation, ancillary services, probabilistic tools. I. INTRODUCTION he European Union is committed to reducing its overall emissions to 20% below 1990 levels by 2020. It has also set itself the target of increasing the share of renewables in primary energy use to 20% by 2020. This leads to an estimated share of 35% of electricity from renewable sources, with an estimated share of 15% for wind energy. In line with these commitments taken late 2008, wind energy will be the most prominent renewable resource in Europe in next decades. A fair share of this wind capacity should be growingly installed offshore for several reasons: higher resource level and probably higher wind “quality”, lack of remaining promising sites onshore, growing public opposition against future onshore wind parks. The European Wind Energy Association publishes a vision bringing the amount of installed off-shore capacity from 2 GW Keith Bell is with University of Strathclyde Glasgow, UK - Diego Cirio and Gianluigi. Migliavacca are with ERSE Milano, Italy - Anne-Marie Denis and Patrick Panciatici are with RTE Versailles, France – Lina He and Chen Ching Liu are with University College of Dublin – Dublin, Ireland – Carlos Moreira is with Inesc Porto, Portugal. end 2009, up to 40 GW in 2020, with an ambitious target of 150 GW in 2030. The emergence of these huge amounts of off-shore generation raises new technical challenges. Indeed above a given range of power and distance, the only technical solution is the HVDC technology instead of the HVAC one, and more likely the promising VSC (Voltage Source Converter) technology, provided losses and fault clearing are properly handled in forthcoming years. More details on VSC and LCC (Line Commutated Converters) are respectively available in [9-12]
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This note was uploaded on 01/03/2011 for the course EEE 1000 taught by Professor K.bell during the Spring '10 term at Uni. Strathclyde.

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TWENTIES for IEEE ISGT Gothenburg 2010 - 1 Economic and...

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