Power System Reliability Report - RTE

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R-AUDIT-SG-DAR-MAS-11-2011/022010 Reliability ReportPage : 24/408 juillet 2011Study toolThe deployment of the Convergence study platform, developed to standardize the study tools used fornetwork development (long term) and the preparatory or real time studies for operation, was finalizedin 2010, with a common training programme for both professions. Convergence is at the centre offunctional changes currently being made to improve the precision of short term studies and to updatethem to intra-day -see §5.6- in particular by providing a process whereby "fixed points" are merged togive a single, shared vision of network situations and a more ergonomic and dynamic simulationmodule.Safety Telecommunications Network GlosRTE is running project ROSE, which consists in internalising and modernising the Safety Network bydigitizing and further equipping it with fibre optic telecommunication cables fitted to existingtransmission structures, to host high-level, reliability-related applications: teleprotection firstly, withpriority to line differential protections, then tele-control and telephone security. This project isexpected to provide better service availability and reliability than previous solutions.In 2010, given the critical impact of this new telecommunications network on reliability, the projectwas subjected to a detailed review by high-level outside experts before deciding of its industrialdeployment.The Telecommunications Network Operational Code was published, to ensure the network‟soperational management as of now and with a view to ROSE being commissioned. Using a similarapproach to the Transmission Networks Control Code, it stipulates expected service levels (restorationtime), organisation, responsibilities and actions to achieve the forecasted management of the back-uptelecom network maintenance, and how it should be supervised, monitored and administered.As regards tele-protection, the migration of communication lines between the ends of the 400 kV linedifferential protection to ROSE was near to being completed at the end of 2010: 13 lines are still to bemigrated in 2011.For the classic RF network, progressively being phased out, 2009‟s report can be repeated: traffic isstill decreasing steeply, availability remains stable, the contractor‟s response levels in terms of thedetection and repair of malfunctions is stable, way below contractual commitments. Maintaining theavailability of equipment still in service must be closely monitored until the service is closed down.Beyond the behaviour of telecommunications media, such as the RF network, in terms of reliability, itis interesting to consider the services provided: remote control success rate is 98.5% and thetelemetering outage level is at 0.19%, these results are in line with required performances. Theteleindicator outage rate increased to 0.23% (for a desired max. threshold of 0.20%), linked to anincorrect interface specification for the new digital substations, which should be corrected in 2011. Forthe links between the two ends of the line differential protections, still ensured by the RF network,average outage time was 2hrs24mins (for a contractual objective of 8hrs45mins maximum).4.1.6 Load / consumptionIn a context where attention is focused on the smart-grid 15 concept, it is interesting to look at thespecific actions carried out by RTE to create or use load withdrawal, favouring overall marginmanagement or regional congestion control in the framework of contracts or cooperative consumerbehaviour.At the start of the year RTE contributed heavily to the work of the "Working group on management ofpeak electricity demand" chaired by Mr Poignant and Mr Sidot, the conclusions of which were largelyused in the NOME law, see §3.1.RTE is keen to heighten consumer awareness regarding the impact of their behaviour on moderatingconsumption peaks. In Brittany, the Ecowatt scheme‟s notoriety has been reinforced, with significantsupport from local municipalities and associations. The same is true in the South-East where Ecowattreplaced a previous similar scheme in December. In the West, there are 30,000 registered members(compared to 18,000 at the end of 2009), who got 3 orange and 3 red alerts in January, then 5orange and 2 red at the end of the year. In the South-East, 12 orange alerts were sent out at the15 A concept that goes way beyond simple load management, see for example: "RTE major smart-grid agent”,Michel Bena, REE n°10, Nov.2010Copyright RTE. This document is the property of RTE. Any communication, reproduction, publication even partial is forbidden without the express written authorisationElectricity Transmission System operator (RTE)
R-AUDIT-SG-DAR-MAS-11-2011/022010 Reliability ReportPage : 25/408 juillet 2011start of the year and one on December 16th. It is important to support and develop this process in thelong term.More generally, in its “Brittany electricity pact”, RTE has favoured distributed load adjustmentexperimentation in the St Brieuc area.In the South-East, RTE is participating in different regional energy control experiments (Premio,Reflexe) through which the Var and Alpes-Maritimes departments have been able to analyse theirregional consumption.To increase the availability of industrial consumer withdrawal offers on the MA, and considering thelimited but positive results of contracts signed in 2009 and 2010, RTE renewed the contracts for thistype of product at the end of 2010 so that a volume of 110 MW, that may be activated 20 times in2011 and 120 MW, that may be activated 12 times from May 1 st 2011, would be available during tensesituations.For the MA, the volume available from offers made up through the aggregation of withdrawals fromsmall consumers is low, between 10 and 15 MW; these were essentially activated in the last quarter.In order to assess the potential of having adjustment proposals for products that can be activatedrapidly, within a few minutes, which would be completely appropriate to help manage the problemsposed by frequency variations on the hour (see §2.2), for which it was interesting to examine thewithdrawal potentials, RTE organised a test tender. 3 one month contracts were granted for 51 MWfor industrial or distributed withdrawals. Feedback, showing the pertinence of the approach, wastaken into account in the technical and financial definition (attribution of a bonus in the interfiling ofresponses to the tender) of the requested products in the context of the tender for "rapid andcomplementary reserves", sent out at the end of 2010 in view of renewing the contract ending in April2011.4.2 Structure of the system and its design rulesIn 2010, RTE updated the 2009 provisional supply & demand balance report for electricity in France.Its conclusions were confirmed: the reliability of electricity procurement should be stable until 2013,taking into account production facilities expected to come on line, and the increase in consumptionpeaks during cold spells is a cause for concern.RTE has continued the work started in 2009 aiming to revise the network development policy andstudy methods, to adapt them to the context of coming years: new technical solutions, European grid,generation flow pattern, objection to projects, etc. The framework for a multi-criteria analysis must bedefined, to be a credible response to the multi-dimensional problem of assessing possibledevelopment strategies, using as inspiration the theoretical conclusions from the European projectRealisegrid. Work in 2010 led, for example, to a definition of the determining parameter values (costsof loss and undistributed energy, etc.). In parallel to this, a 400kV target grid project has been definedfor 2030, but remains to be detailed in relation to the corresponding work at ENTSO-E level.As concerns decisional studies, the different RTE teams concerned are working on bringing togetherboth development and operating methods and tools to further take into account future operationalconstraints in development decisions (operation during planned outages, voltage management,withdrawal PLCs). This can be seen in the introduction of a single study platform (Convergence) andthe gradual setting up of common training programme. However, this progress which is important fornetwork reliability in years to come, is far from complete; in 2010, an analysis of low voltage problemstudy methods was started, but needs to be continued. Similarly, the late identification of the issuesarising from the integration of new current level limits in development studies shows the need tostrengthen coordination.As concerns network development in the coming years, we see that RTE has worked in closecollaboration with the government services to identify the constraints that will be created on thetransmission network given the locations considered for off-shore wind power production installationsin the call for tender prepared by the public authorities.Copyright RTE. This document is the property of RTE. Any communication, reproduction, publication even partial is forbidden without the express written authorisationElectricity Transmission System operator (RTE)
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Power System Reliability Report - RTE

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