NEW FRANCE SPAIN INTERCONNECTION PROJECT Madrid, 9 December 2010 1
GENERAL DESCRIPTION (1/2) HVDC double circuit 2 x 1000 MW BAIXAS VIC GAUDIERE HVDC RIUDARENES STA LLOGAIA RAMIS BESCANO 2 independent d systems ± 320 kv DC (No need of MV cable for earthing connection) 65 km length (32 km Spain + 33 km France) 8 km tunnel (1 km ES + 7 km FR), 3,5 m inner F Rest by independent trenches: 2 x (31 km ES + 26 km FR) Extruded cables: 4 x (32 km ES + 33 km FR) Converter stations (AC/DC) VSC technology (Voltage Source Converter) Santa Llogaia: 2 converter stations Baixas: 2 converter stations AC substations are not part of the project Baixas AC substation: existing Santa Llogaia AC substation: to be done 2
GENERAL DESCRIPTION (2/2) CNE CRE ERSE. 7th IG meeting 3
VSC TECHNOLOGY vs LCC (1/2) LCC: Line Commutated Converters Based on thyristors: Only start up control (no shut down control) Current flow only in one direction power flow reversed only by reversing the voltage polarity Ati Active power control l(depending di on the thyristors t firing i angle applied on the network voltage) AC network voltage must be available Reactive power consumption (no reactive power control) VSC: Voltage Source Converter Based on IGBTs: Start up and shut down control Current flow bidirectional voltage polarity does not need to be reversed to change the power flow direction Active and reactive power independent controls (based on the control of each IGBT to be conducing or blocked: phase angle and module of the voltage is chosen to build the required voltage signal in order to get the P and Q order) AC network voltage is not required (just a voltage reference is needed) Black start capability 4
VSC TECHNOLOGY vs LCC (2/2) Advantages Key features Independent d control of active and Recent technology reactive power per system Rated power of the former projects is Black-start capability under 1000MW (up to 400MW for Possibility to feed a passive network NordEON HVDC link) Power flow reversal capability Extruded cables tested up to 320 kv without polarity reversal on Losses values for converter stations voltage(since otage(s the current is sabe able to obe raising as gat aou around 1,1 1,7 % for each bidirectional through IGBTs) converter station Space reduction (approx 40% less than Complexity of the valve control system LCC) AC filters limited or unnecessary Standard transformers (lower harmonics level) Continuous and precise voltage control No minimum active power limit No minimum Scc requirement No risk of overvoltages 5
PRELIMINARY CONVERTERS LAYOUT: Under tender analysis (1/2). Santa Llogaia 6
PRELIMINARY CONVERTERS LAYOUT: Under tender analysis (2/2). Baixas 225 m 170 m Bi Baixas Converter Station 7
Tunnel ends INTERCONNECTION ROUTE: SPANISH SIDE FROM SANTA LLOGAIA TO THE TUNNEL Santa Llogaia Converter Station 8
TUNNEL: Longitudinal section 9
TUNNEL: Cross section Servicios auxiliares 35m 3,5 10
TRENCHES: Cross section PERMANENT OCCUPATION = 4 7 m 0,5 m 0,5 m 1 m 0,5 m 2 5 m 11
GENERAL PLANNING 30/06/10 End of technical analysis for cables and beginning i of commercial negotiations 31/07/10 End of technical analysis for converters and beginning of commercial negotiations 23/08/10 Reception of tunnel tenders 30/09/10 End of Short Term Test for cables Tests evaluation 31/10/10 Report on technical and commercial evaluation for converters and cables 31/11/10 Report on technical and commercial evaluation for tunnel 31/12/10 Purchasing order for converters, cables and tunnel 31/12/10 DIA permission (Spanish side) 28/02/11 / DUP permission (French side). Land purchasing is began 31/03/11 Trenches bid 30/06/11 End of cables testing 30/09/11 End of land purchasing and ocupational agreements 30/09/11 Trenches contract award 01/10/11 Beginning of works for trenches, converters and tunnel 30/06/12 End of works for trenches and directional drillings 30/06/13 End of works for tunnel 31/12/13 End of Off load testing of the interconnection (voltage testing) and Commissioning 30/06/14 On load testing commercial operation (possible from February, depending on network availability for testing) 12
ACCOMPLISHED MILESTONES UP TO NOW April 2009 June 2009 Delivery of the mini specifications for a call for feasibility studies, for different technologies (VSC LCC converters, extruded or mass impregnated cables), in both technological and economical aspects Reception of the feasibility studies for converter stations and cables June August 2009 Analysis of the feasibilitystudies studies (converterstations andcables) August 2009 Up to Nov 2009 December 2009 September, 2009 February 2010 February 2010 March 2010 March 2010 Comparative between technologies (VSC and LCC converter stations) VSC converters / extruded cables chosen Preliminary studies for the interconnection route Delivery of the Specifications for call for tender of converter stations and cables Delivery of the Tender Rules / Purchasing strategy for converters and cables admissibility Basic Project for the call for tender of the tunnel Delivery of the Official Pre projects for Santa Llogaia converter station and Spanish cables Delivery of the Spanish Environmental Study Processing of the Official Pre projects for Santa Llogaia converter station and Spanish cables and Spanish Environmental Study, in order to ask for the DIA permission for Spanish side January Abril 2010 Clarifications to questions and comments coming from the suppliers regarding gconverter specifications April 2010 April 2010 June July 2010 April June 2010 April August 2010 October 2010 August, 2010 Reception of the converter stations and cables tenders Final cables requirements for the tunnel design Writing of an Evaluation Criteria for losses and PQ capability within converter stations Analysis of the cables technical offers / Clarifications with cables suppliers Analysis of the converter stations technical offers / Clarifications with converter stations suppliers Specification for a procedure for future measurements/verifications of losses and additional PQ data provided by the converter stations suppliers Reception of tunnel offers 13
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