Future Needs for Overhead Line Design to Optimize Aesthetics & - - PowerPoint PPT Presentation

Future Needs for Overhead Line Design to Optimize Aesthetics & Costs

ALEXANDER BRAUN

Development of Aesthetic Pole Designs for Improved Technical Feasibility and Cost Efficiency

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• 1. Introduction Europoles Group
• 2. Pole-Designs: The “Magic Triangle”
• 3. Recent Developments & Improvements

AGENDA

ABOUT EUROPOLES

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ABOUT EUROPOLES

Facts & Figures 2014

• 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
• f steel, concrete, fiberglass &

hybrid structures – 3m to 130m

> 200 Mio. €

Turnover 2014 Employees

Facts & Figures 2014

1,400 worldwide

5 Special catenary poles – Rhombus shape, Leipzig/ Germany Frangible glide path tower, Airport Dresden/ Germany

ABOUT EUROPOLES

References – Customized Solutions

Apron lighting & wind measurement poles, Airport Halle-Leipzig/ Germany

6 Communication tower, Deggendorf/ Germany Wind energy „tree“, Pleumeur Bodou/ France

ABOUT EUROPOLES

References – Customized Solutions

Telecommunication tripod structure, Stuttgart/ Germany

7 Floodlight mirror pole, Yas Island /Abu Dhabi Special colored concrete columns, Leipzig/ Germany

ABOUT EUROPOLES

References – Customized Solutions

Flodlight poles, world-famous Holmenkollen ski-jump/ Norway

8 „Concrete knot“, Landesbank Baden-Württemberg, Karlsruhe-Germany Mosquée de l'Algérie, Algeria (under construction)

ABOUT EUROPOLES

References – Customized Solutions

9 Hybrid pole in action Hybrid pole - details Hybrid pole – optimized for bird protection

ABOUT EUROPOLES

Innovations - Hybrid design: Steel + FRP

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ABOUT EUROPOLES 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

ABOUT EUROPOLES Extra High Voltage Solutions

Tension pylon 1x 380 kV + 2x 110 kV

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COATING POSSIBILITIES TITELMASTERFORMAT

The „Magic Triangle“

THE “MAGIC TRIANGLE”

Public Acceptance Technical Feasibility Aesthetic Design Cost Efficiency

Smaller “Right of Way” Lower Height

Reduced EM-Fields

Pleasant Design Modern Infrastructure

Possibility to “Have a Choice” Participation

Reduced Landscape Impact

Public Acceptance Technical Feasibility Aesthetic Design Cost Efficiency

THE “MAGIC TRIANGLE”

Smaller “Right of Way” Lower Height

Reduced EM-Fields

Pleasant Design Modern Infrastructure

Possibility to “Have a Choice” Participation

Reduced Landscape Impact Durability

Statical Requirements Electrical Requirements

Lifetime >80 years

Corrosion Protection

Earthing & Flash Protection Electrical clearance EM-Fields

Induced currents Ageing & Fatigue

National Standards

Public Acceptance Technical Feasibility Aesthetic Design Cost Efficiency

THE “MAGIC TRIANGLE”

Smaller “Right of Way” Lower Height

Reduced EM-Fields

Pleasant Design Modern Infrastructure

Possibility to “Have a Choice” Participation

Reduced Landscape Impact Durability

Statical Requirements Electrical Requirements

Lifetime >80 years

Corrosion Protection

Earthing & Flash Protection Electrical clearance EM-Fields

Induced currents Ageing & Fatigue

National Standards Cost for extra Design

Foundation Costs Pole Costs Development Costs Marketing Costs

Test program External Consultants Learning Costs

Public Acceptance Technical Feasibility Aesthetic Design Cost Efficiency

THE “MAGIC TRIANGLE”

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COATING POSSIBILITIES TITELMASTERFORMAT

Current Developments & Improvements

Public Acceptance Technical Feasibility Aestethic Design Cost Efficiency

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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 Conclusions:

• Compacting the pole by using monopoles
• Using compact insulators
• Specially designed poles with less space requirements

Reduction of electromagnetic fields and space requirements

EMV-fields of innovative pole designs – Wintrack I simulation EMV-fields of traditional lattice towers

CURRENT DEVELOPMENTS & IMPROVEMENTS

1 Different conductor arrangements leading into different magnetic field strengths (KEMA Study: Bi-pole Tower design resulting in low magnetic fields) 400kV „Camouflage Pole“ – Design Competition UK

CURRENT DEVELOPMENTS & IMPROVEMENTS Reduction of electromagnetic fields

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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

Reduction of the visual impact

400kV „Camouflage Pole“ – Design Competition UK

CURRENT DEVELOPMENTS & IMPROVEMENTS

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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

Reduction of the footprint of the line

Comparison „Compact Pole“ to Lattice Structure

CURRENT DEVELOPMENTS & IMPROVEMENTS

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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

Summary: CURRENT DEVELOPMENTS & IMPROVEMENTS

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COATING POSSIBILITIES TITELMASTERFORMAT

Current Developments & Improvements

Public Acceptance Technical Feasibility Aesthetic Design Cost Efficiency

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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

Research project : Compact Extra High Voltage Pylons and Crossarms

CURRENT DEVELOPMENTS & IMPROVEMENTS

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Europoles GmbH & Co. KG Fichtner GmbH & Co. KG Lapp Insulators GmbH Technical University of Braunschweig Technical University of Dresden Karlsruher Institute for Technology

Project partners - Compact Extra High Voltage Pylons and Cross Arms :

CURRENT DEVELOPMENTS & IMPROVEMENTS

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Mechanical Strength – Isolator Testing

CURRENT DEVELOPMENTS & IMPROVEMENTS

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

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Full Scale Testing of Crossarm in VTZ-SAG Langen – broken wire conditions

Mechanical Strength – Isolator Testing

CURRENT DEVELOPMENTS & IMPROVEMENTS

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

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Pole Bending Test – UHPC, Load 80 tons

Full Scale Testing: Ultra-High-Strength-Concrete (UHPC):

More than 10 full scale tests already done

CURRENT DEVELOPMENTS & IMPROVEMENTS

11 11 Testing the Electrical Behaviour of Concrete

Electrical Testing

Flashover Testing Thermal Behaviour & Influence of induced currents – Flashover & Short-circuit Behaviour

CURRENT DEVELOPMENTS & IMPROVEMENTS

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Full Scale Testing: Steel Transmission Poles

CURRENT DEVELOPMENTS & IMPROVEMENTS

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◄ Steel buckling behaviour in reality ◄ Simulated steel buckling behaviour Full scale testing of steel poles ►

CURRENT DEVELOPMENTS & IMPROVEMENTS

Full Scale Testing: Steel Transmission Poles

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A lot of tests and calculations were already done

• 1. Calculation models are available
• 2. Models are tested by full scale test
• 3. Poles are following basic statical rules
• 4. Even dynamic influences can be simulated

The market dynamic creates (cost) efficient solutions

• 1. Learning curve > 30 years
• 2. A lot of structures are already decades in service
• 3. Electrical behaviour can be controlled
• Solutions are feasible

Summary: CURRENT DEVELOPMENTS & IMPROVEMENTS

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COATING POSSIBILITIES TITELMASTERFORMAT

Current Developments & Improvements

Public Acceptance Technical Feasibility Aesthetic Design Cost Efficiency

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Extra High Voltage – current situation Compact & Designer Poles:

• Reduction of visual impact
• Reduction of electric magnetic fields
• Reduction of “right of way”
• Reduction of pole footprint
• Fast erection due to preassembled delivery

Higher acceptance by the people, smaller

trenches, lower impact on landscape

Much higher costs (3x – 10x) compared to

steel lattice

CURRENT DEVELOPMENTS & IMPROVEMENTS

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Solution 1: Underground Cable

• 1. Extreme expensive
• 2. High losses due to compensation
• 3. Difficulties to reach and upgrade

Solution 2: Monopoles & Compact Lines:

• 1. Suitable for medium & high voltage requirements
• 2. Reduction of the protective strip, smaller footprint
• 3. Better integration in the landscape
• 4. Cost effective solution – competitive to steel lattice

Summary:

Cost per km Public Resistance

Underground Cables Innovative Monopoles Lattice Towers

CURRENT DEVELOPMENTS & IMPROVEMENTS

Rammed pipe foundation for suspension poles

Reduction of costs - Foundation methods

Drilled pipe foundation Block foundation Rammed pipe foundation Section foundation – embedded pole base part

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Alternative solutions – based on ground conditions

Star shape foundation on rammed pipes Flat foundation with anchor bolts

CURRENT DEVELOPMENTS & IMPROVEMENTS

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Drop over foundation CURRENT DEVELOPMENTS & IMPROVEMENTS

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Latest development – Section foundation CURRENT DEVELOPMENTS & IMPROVEMENTS

Price comparison – Lattice vs. Monopole Structures

50 100 150 200 250 300 350 Lattice Tower Steel Monopole Hybride Pole Concrete Monopole Decorative Monopole Total Sum 100 210 105 102 340 Erection 30 10 10 12 20 Transport 10 20 25 30 20 Pole Price 60 180 70 60 300

100 210 105 102 340

Price Index Structure Type

Pole Price Transport Erection & Assembly

Advanced Concrete Technology for cost effective Monopole Solutions

CURRENT DEVELOPMENTS & IMPROVEMENTS

QUESTIONS & ANSWERS