Future Needs for Overhead Line Design to Optimize Aesthetics & Costs ALEXANDER BRAUN
Development of Aesthetic Pole Designs for Improved Technical Feasibility and Cost Efficiency
AGENDA 1. Introduction Europoles Group 2. Pole- Designs: The “Magic Triangle” 3. Recent Developments & Improvements 2
ABOUT EUROPOLES
ABOUT EUROPOLES Facts & Figures 2014 Facts & Figures 2014 Turnover 2014 Employees > 200 Mio. € 1,400 worldwide Market leader in Europe More than 125 years experience in the poles business Factories in Germany, Poland, Switzerland and Oman Production facilities for concrete, steel and fibreglass poles Technical department & production of steel, concrete, fiberglass & hybrid structures – 3m to 130m 4
ABOUT EUROPOLES References – Customized Solutions Special catenary poles – Apron lighting & wind measurement poles, Airport Halle-Leipzig/ Germany Frangible glide path tower, Airport Dresden/ Germany Rhombus shape, Leipzig/ Germany 5
ABOUT EUROPOLES References – Customized Solutions Wind energy „ tree “ , Pleumeur Bodou/ France Telecommunication tripod structure, Stuttgart/ Germany Communication tower, Deggendorf/ Germany 6
ABOUT EUROPOLES References – Customized Solutions Floodlight mirror pole, Flodlight poles, world-famous Holmenkollen ski-jump/ Norway Special colored concrete columns, Yas Island /Abu Dhabi Leipzig/ Germany 7
ABOUT EUROPOLES References – Customized Solutions „ Concrete knot “ , Landesbank Baden-Württemberg, Mosquée de l'Algérie, Algeria (under construction) Karlsruhe-Germany 8
ABOUT EUROPOLES Innovations - Hybrid design: Steel + FRP Hybrid pole – optimized for bird protection Hybrid pole in action Hybrid pole - details 9
ABOUT EUROPOLES High Voltage Solutions 10
ABOUT EUROPOLES Extra High Voltage Solutions 2x380kV Compact system – Terna Italy 2x 380kV Line – Suspension and Tension Poles, Italy
ABOUT EUROPOLES Extra High Voltage Solutions 2x380kV Compact system – Terna Italy 1x 380kV Line – Suspension and Tension Poles, Wrozlaw, Poland Tension pylon 1x 380 kV + 2x 110 kV
COATING POSSIBILITIES TITELMASTERFORMAT The „ Magic Triangle “ 13
THE “MAGIC TRIANGLE” Public Acceptance Aesthetic Design Cost Technical Efficiency Feasibility
THE “MAGIC TRIANGLE” Reduced EM-Fields Lower Height Reduced Landscape Impact Modern Infrastructure Possibility to “ Have a Choice ” Participation Public Acceptance Pleasant Design Smaller “Right of Way” Aesthetic Design Cost Technical Efficiency Feasibility
THE “MAGIC TRIANGLE” Reduced EM-Fields Lower Height Reduced Landscape Impact Modern Infrastructure Possibility to “Have a Choice” Participation Public Acceptance Pleasant Design Smaller “ Right of Way ” National Standards Aesthetic Statical Requirements Design Ageing & Fatigue Durability Cost Corrosion Protection Technical Efficiency Lifetime >80 years Feasibility Earthing & Flash Protection Induced currents Electrical clearance EM-Fields Electrical Requirements
THE “MAGIC TRIANGLE” Reduced EM-Fields Lower Height Reduced Landscape Impact Modern Infrastructure Possibility to “Have a Choice” Participation Public Acceptance Pleasant Design Smaller “ Right of Way ” National Standards Marketing Costs Aesthetic Statical Requirements Design Foundation Costs Ageing & Fatigue Durability Cost Corrosion Protection Pole Costs Technical Efficiency Lifetime >80 years Feasibility Cost for extra Design Earthing & Flash Protection Learning Costs Induced currents Electrical clearance Development Costs EM-Fields External Consultants Electrical Requirements Test program
COATING POSSIBILITIES Public Acceptance Current Aestethic TITELMASTERFORMAT Design Developments Cost Technical Efficiency Feasibility & Improvements 18
CURRENT DEVELOPMENTS & IMPROVEMENTS Reduction of electromagnetic fields and space requirements Background: Magnetic field standard of the International Commission for Non Ionising Radiation Protection (ICNIRP) = 100 microTesla E.g. TenneT magnetic field standard in the Netherlands = 20 microTesla E.g. Dutch Ministry of Housing, Planning and the Environment = 0,4 microTesla for people living close to the OHL EMV-fields of traditional lattice towers Conclusions: Compacting the pole by using monopoles Using compact insulators Specially designed poles with less space requirements EMV-fields of innovative pole designs – Wintrack I simulation 19
CURRENT DEVELOPMENTS & IMPROVEMENTS Reduction of electromagnetic fields 400kV „Camouflage Pole“ – Design Competition UK 1 Different conductor arrangements leading into different magnetic field strengths (KEMA Study: Bi-pole Tower design resulting in low magnetic fields)
CURRENT DEVELOPMENTS & IMPROVEMENTS Reduction of the visual impact Background: Resistance of residents and nature conservation organisations Lobby against extensive and high lattice towers Conclusions: Reduction of the height and width of the poles Replacement of lattice with monopole designs Especially designed poles adopting the surrounding landscape 400kV „Camouflage Pole“ – Design Competition UK 2
CURRENT DEVELOPMENTS & IMPROVEMENTS Reduction of the footprint of the line Background: High costs for occupied land – especially in populated areas Problems with land owners and “right of ways” Limitation of the landscape for big foundations and cross- section dimensions Conclusions: Changing to monopole designs – enables the reduction of the footprint of the pole and under the line Usage of new foundation methods Very expensive alternative: Usage of underground cables Comparison „Compact Pole“ to Lattice Structure 3
CURRENT DEVELOPMENTS & IMPROVEMENTS Summary : Compact & modern design can gain more public acceptance 1. Modern pole design can be a part of the participation process 2. A compact conductor arrangement is reducing the magnetic field strength 3. Compact pole designs may be an alternative to avoid cable discussions especially in rural areas and forest crossings Measurable reduction of the impact on landscape and a significant space reduction 1. State of the art environmental impact models reflect the reduction of height and space requirements 2. Measureable lower compensation rates 3. Preferred OHL-solution in the legal consideration process 4
COATING POSSIBILITIES Public Acceptance Current Aesthetic TITELMASTERFORMAT Design Developments Cost Technical Efficiency Feasibility & Improvements 5
CURRENT DEVELOPMENTS & IMPROVEMENTS Research project : Compact Extra High Voltage Pylons and Crossarms Objective: Environmentally and resource friendly construction , that contributes with a compact arrangement of the conductors to a significant reduction in line width and required area – maintaining the economic requirements and technical safety. Facts and figures: Period: 24 months Budget: 2,7 Mio. EUR, sponsorship approx. 1,8 Mio. EUR Universities: TU Braunschweig, TU Dresden, KIT (Karlsruhe) Partners: Fichtner, Lapp Focus of development: Basic materials: High-performance concrete (UHPC), composite isolators&crossarm design, material & EMF-test Constructions: Hybrid constructions concrete/steel / optimization through the use of multi edged cross section steel poles/ optimization of foundations (e.g. compact piles, drop over) / optimization of pole joints Validated and accompanied by: Acceptance studies and surveys PR work Environmental assessment Pole Bending Test with the equivalent of 80t tractive force 6
CURRENT DEVELOPMENTS & IMPROVEMENTS Project partners - Compact Extra High Voltage Pylons and Cross Arms : Europoles GmbH & Co. KG Fichtner GmbH & Co. KG Lapp Insulators GmbH Technical University of Braunschweig Technical University of Dresden Karlsruher Institute for Technology 7
CURRENT DEVELOPMENTS & IMPROVEMENTS Mechanical Strength – Isolator Testing Basic-Parameters: (acc. DIN EN 50341-3-4:2011) Wind-Zone 2 Ice-Zone 2 Span length 450m Wind-Span 500m Weight-Span min. 300, max. 600m Conductor: 4x 565-AL1/72ST1A (acc. EN 50182) OPWG: 1x 264-AL3/24-A20SA – 26,3 8
CURRENT DEVELOPMENTS & IMPROVEMENTS Mechanical Strength – Isolator Testing Loads acc. to DIN EN 50341-3-4:2011 Loadcase „ Dmax “: Fx = 68,66kN Fy = 121,67kN Special Load Case „J“: Fy = 90,13kN Fz = 133,05kN Full Scale Testing of Crossarm in VTZ-SAG Langen – broken wire conditions 9
CURRENT DEVELOPMENTS & IMPROVEMENTS Full Scale Testing: Ultra-High-Strength-Concrete (UHPC): More than 10 full scale tests already done Pole Bending Test – UHPC, 10 Load 80 tons 10
CURRENT DEVELOPMENTS & IMPROVEMENTS Electrical Testing Flashover Testing Thermal Behaviour & Influence of induced currents – Flashover & Short-circuit Behaviour 11 11 Testing the Electrical Behaviour of Concrete
CURRENT DEVELOPMENTS & IMPROVEMENTS Full Scale Testing: Steel Transmission Poles 12 12
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