demo 4: innovative repowering of ac corridors · accc 980/75 annealed 175 ztacir 319/191...
TRANSCRIPT
DEMO 4: INNOVATIVE REPOWERING OF AC CORRIDORS
“INNOVATIVE NETWORK TECHNOLOGIES AND THE FUTURE OF EUROPE'S ELECTRICITY GRID” BEST PATHS DISSEMINATION WORKSHOPMADRID, 22 NOVEMBER 2017
Dr. Matthias Müller-Mienack
50Hertz Transmission GmbH/
GridLab GmbH
22 November 2017
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DISSEMINATION. WORKSHOP – 22 NOV. 2017
DEMO 4: Overview (I)
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Demo 4Upgrade of existing
AC overhead lines
for capacity increase
Leader: 50Hertz
• Insulated cross-arm tests & installation
• Innovative overhead line designs and retrofit processes
• Innovative live-line working
• Dynamic line rating based on low-cost sensor
• HTLS conductortests & installation
Goal: Increase the availability of capacity of existing AC assets
Main objective: Demonstrate the role and impacts of several innovative systems for the repowering of existing AC transmission corridors
Budget: 8,446 k€
DEMO 4: Overview (II)
DISSEMINATION. WORKSHOP – 22 NOV. 2017
DEMO 4: EXPECTED RESULTS & IMPACT
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• Optimisation of transmission capacity on existing lines
• Increased flexibility with regard to operation and maintenance
• Support of TSOs in overhead line construction, maintenance and operation
• Facilitation of new system operation options
• Reduction of overall investment since it is not necessary to build new lines
• Cost reduction due to shorter building time and minimisation of downtimes on the lines
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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Insulated cross-arms• All planned innovative laboratory tests successfully finished, assured quality of the
insulated cross-arms for the new overhead line at Elia. Scientific part summarized in a number of publications, new test methods under consideration of CIGRE/IEC.
• Conductor pulling operations successfully, all sections equipped with insulated cross-arms.
Long-term tests with High Temperature Low Sag Conductors (HTLS)• Mechanical and electrical tests of HTLS conductors (incl. accessories) recently finished
• Evaluation of test results is ongoing.
Composite towers and rock foundation• Engineering for whole composite tower started
Live-line working (LLW)• Successful conductor car motion test through insulators during normal operation.
• Extension the existing technologies to compact, double circuit high voltage lines
• Air warning marker robot prototype produced and successfully tested.
Dynamic line rating (DLR)• Sensor prototype developed with high technical performance.
• First performance tests conducted.
DEMO 4: The Activities
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Insulated cross-arms (I)
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• Three 5000 hours multi-stress tests performed:
o Heavy erosion not observed in service for larger diameters
o High level currents not typical for the ageing type of test
• Outcome: Proposal will be handed over to IEC TC 36 “Insulators” (indirect spraying)
Realized tests 1: Tracking and erosion test
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Insulated cross-arms (II)
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• Test method for the Water Drop Corona Induced test is developed
• Representative, repeatable, reproducible, cost-effective
• Verified using actual cross-arms from Elia (4 designs are corona free)
• Outcome: Test method presented and included in the draft of CIGRE brochure developed by CIGRE WG B2.57
Realized tests 2: Corona test
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Insulated cross-arms (III)
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• Rapid flashover pollution test developed and applied for a number of test configurations
• Can be practically applied for next section of Elia OHL (if coming close to the coast)
• The results are applicable for statistical dimensioning
• Outcome: Proposal for test method handed over to CIGRE WG D1.44 and results are included in recently published TB 691.
Realized tests 3: Pollution test
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Insulated cross-arms (IV)
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Tests finished, operation started
• To assure the reliability careful verification of materials, individual insulators and complete cross-arms was performed
• The scientific part of the project resulted in a few innovative test methods presented for CIGRE/IEC for international acceptance.
• Two different manufacturers passed the complete test program
• The innovative structure of the cross-arm allowed for the compact overhead line 380 kV the same height as existing in the area 150 kV convenient overhead line. Operation started in October 2017
• Outcome: This may be an interesting example for other European utilities experiencing low public support of new overhead lines.
•
DISSEMINATION. WORKSHOP – 22 NOV. 2017
HTLS long-term tests (I)
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Conductor typeAlloy Rated temperature
ϑr in °C
ACSS/TW 467/66 Annealed 200
ACPR 850/87 Aluminum-Zirconium (AT1) 150
GZTACSR 392/46 Aluminum-Zirconium (AT3) 210
TACSR 382/49 AT1 or better 150
ACCC 980/75 Annealed 175
ZTACIR 319/191 Aluminum-Zirconium (AT 3) 210
ACCR 715-T13 Aluminum-Zirconium (AT 3) 210
ACSR 380/50 Hard drawn 80
HTLS = High Temperature Low Sag conductor
7 high temperature conductors and one reference conductor system investigated
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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• Long-term loading tests on conductor systems finished
• Mechanical and electrical performance tests finished
• Evaluation of test results currently ongoing
• Promising test results to be expected, e.g.:
Slippage test of a conductor fittingNew and aged carbon core after breaking test
HTLS long-term tests (II)Status quo of long-term tests with High Temperature Low Sag Conductors
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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Next steps
• Finalisation of test evaluation in the upcoming weeks
• Reporting of test results in Deliverables 6.1 and 6.2
• All HTLS research activities expected to be finished by end of 2017
HTLS long-term tests (III)
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Composite towers and rock foundation (I)
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Composite tower pole
Status quo
Composite towers
• Gluing test of full size (ø 900 mm) tube performed at CSUB (manufacturer) facilities
• Full scale compression test of two 25 meter composite poles performed
• Engineering for whole tower started
Rock foundation
• Determination of design heat-loads ongoing
• Engineering design of steel members
• Engineering design of GRP (glass reinforced plastic)
Rock foundation
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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Composite towers
• Complete engineering for the whole composite tower
• Production and testing of complete tower
Rock foundation
• Complete evaluation of engineering challenges
• Reassessment of engineering design
Composite towers and rock foundation (II)Next steps
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative live-line working (LLW) (I)
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Field tests: Robotic installation of aircraft warning markers (AWMs)
5. October 2017: 2 AWMS installed on a test stand + 10 AWMs mounted on a powerline in exactly 1 hour using 2 robots.
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative live-line working (LLW) (II)
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Video showing robot mounting of air warning markers (AWM)
Supported by Newswire (film shooting) and Innova (building the robot)
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative live-line working (LLW) (III)
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Next steps with robotic installation of aircraft warning markers (AWMs)
• Complete technology qualification use at
Statnett
• Testing of production-line robots on a large scale project (60 markers, 6 spans)
• Testing of production-line robot on a live line
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative LLW (IV)
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Development of a new type of conductor car
DISSEMINATION. WORKSHOP – 22 NOV. 2017
• Ability to pass suspensor insulator
• Non-conductive materials
ICOLIM 2017 – „Development of a new type of conductor car from design to assembly”
• Best innovation award and best paper award
CENELEC CLC/TC78 - Acceptance of modification for existing IEC 50374 standard (live working conductor car)
Innovative live-line working (LLW) (V)
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Field testing of the conductor car
• The tuning of the conductor car based on the previously executed test runs is done.
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative live-line working (LLW) (VI)
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Video showing the field test of the conductor car
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative LLW (VII)
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Insulator changing technology (I)
Insulated approach of live parts
• From the ground
• From the leg of the tower
Main and safety suspension
• Use of non-conductive materials
Non-conductive relieving and offload tools
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative LLW (VIII)
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Insulator changing technology (II)
• Successful tests were carried out of insulator changing technology and new tools
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative LLW (IX)
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Insulator changing technology (III)
Extension the existing technologies to compact double circuit high voltage lines:
• Use of reduced size mounting chair
• Use of portable protective air gap to reduce minimal approach distance
• Evaluation of standardised clearances
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Innovative LLW (X)
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Investigation of electric and magnetic fields during high voltage live-line maintenance
• Investigation of face protection
• Examination of screening efficiency
• Inspection of extra-lowfrequency magnetic fields
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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Dynamic line rating (DLR) sensor (I)Dynamic line rating (DLR) based on low-cost sensor – Status quo (I)
• Sag calculation based on tilt measurement: requires very high resolution techniques (+/- 0.005 deg (optimal)) to detect sag variations of max ≈ 10 cm)
• Additional information gathered (conductor acceleration, rotation and spot temperature measurement) to check inconsistencies
• Energy harvesting unit
• Wide range communications system between sensors or sensor-repeater (+15 km)
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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DLR sensor (II)
• To ensure proper and safe performance of the DLR sensor (environmental, mechanical, vibration, drop and free fall, temperature, electrical, EMC, ESD, immunity, emission, LFI, RFI, etc.)
• Installable on live line conditions
EMC: Electro-magnetic compatibility
ESD: Electrostatic discharge
LFI: Low frequency induction
RFI: Radio frequency interference
Set of Tests (R&D)
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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Dynamic line rating (DLR) sensor (III)Set of Tests (DEMO)
• Deployment in 220 kV OHL equipped with all necessary sensors in order to be able to validate the new DLR system
• OPPC System through which one sub-conductor is replaced by FO
• DTS in one ending point which allows to trackthe temperature profile along the whole line (32 km) with less than 10 m sampling
• Weather stations along the line route (6 in total)
OPPC: Optical phase power conductor
FO: Fibre optic
DTS: Distributed Temperature Sensor
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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• The comparison of rating calculation methods (Cigre and IEEE) was carried out
• Algorithm based on these physical models to execute line rating calculations
• Improved calculation method taking into account precipitation
• Neural network improvement for more accurate calculations
Dynamic line rating (DLR) sensor (IV)Development of the BME VIKING physical model
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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• White box algorithm based on IEEE and Cigre models
• BME VIKING improvement on physical factors
• Multi-layer neural network was built and trained based on actual weather data
Dynamic line rating (DLR) sensor (V)Black box and white box models
DISSEMINATION. WORKSHOP – 22 NOV. 2017
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• Sensitivity analysis for input parameters
• Processing of forecast data with interpolation
• Wind effect on every transmission line sections
• Select critical spans with different methods
Dynamic line rating (DLR) sensor (VI)The DLR system design and calculations
DISSEMINATION. WORKSHOP – 22 NOV. 2017
Dynamic line rating (DLR) sensor (VII)
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Next steps
• Forecast the ampacity of the line in a reliable and secure manner based on the available information for different time horizons.
• Examination of the forecasted data.
• Verification of the new-developed version of rating calculation modelbased on actual conductor data
• Development and training of black boxbased on actual conductor data
DISSEMINATION. WORKSHOP – 22 NOV. 2017
DEMO 4 @ Poster Session
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DISSEMINATION. WORKSHOP – 22 NOV. 2017
CONTACT
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Dr. Matthias Müller-Mienack
Advisor to the Chief Markets Head of Research & Studies& System Operations Officer Department
50Hertz Transmission GmbH GridLab GmbH
Heidestraße 2 Mittelstraße 7
10557 Berlin 12529 Schönefeld (nearby Berlin)
Germany Germany
matthias.mueller-mienack [email protected] @gridlab.de
www.bestpaths-project.euFollow us on Twitter: @BestPaths_eu
DISSEMINATION. WORKSHOP – 22 NOV. 2017