Innovative automation of electrical design of off shore windfarms to find the least cost option
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INNOVATIVE AUTOMATION OF ELECTRICAL DESIGN OF OFF-SHORE WINDFARMS TO FIND THE LEAST COST OPTION PowerPoint PPT Presentation


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INNOVATIVE AUTOMATION OF ELECTRICAL DESIGN OF OFF-SHORE WINDFARMS TO FIND THE LEAST COST OPTION. Infrastructure & Cities Sector, Smart Grid Division Siemens Power Technologies International (PTI) Presenter:Victor Sellwood Dr. Dusko P. Nedic ([email protected])

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INNOVATIVE AUTOMATION OF ELECTRICAL DESIGN OF OFF-SHORE WINDFARMS TO FIND THE LEAST COST OPTION

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Innovative automation of electrical design of off shore windfarms to find the least cost option

INNOVATIVE AUTOMATION OF ELECTRICAL DESIGN OF OFF-SHORE WINDFARMS TO FIND THE LEAST COST OPTION

Infrastructure & Cities Sector, Smart Grid Division

Siemens Power Technologies International (PTI)

Presenter:Victor Sellwood

Dr. Dusko P. Nedic ([email protected])

Victor Sellwood([email protected])


Presentation overview

Presentation Overview

  • Introduction - why Optimise construction and operation costs?

  • Development and Experiences / Validation of a software tool for automating the electrical design of large off-shore wind farms.

  • Case Study 1 - Edge-located collector platforms vs Central-located

  • Case Study 2 - Comparison of CAPEX / OPEX for offshore windfarms based on publicly-available data

  • Conclusions


Why optimise construction operation costs

Why Optimise Construction / Operation Costs ?


Why optimise construction operation costs1

Why Optimise Construction / Operation Costs ?

  • UK's Round 3 program will offer 32.2GW / 36GW and there is up-to 80GW offshore in the North Sea

  • 2010: National Grid announced that a radial offshore transmission network is not acceptable

  • 2011: Ofgem report shows that moving from an Independent (radial) to Integrated (mesh) transmission system could reduce Capex from £18B to £15.4B (-16%)

  • A study showed that for only 2 wind farms in the North Sea considering only voltage as a choice, design options would exceed 7,000

  • Image from “Eirgrid_Offshore_Grid_Study_FA Nov2011.pdf”


Software tool for automated design

Software Tool for automated design

Tool Features:

  • Three analysis sub-systems

    • Inter-array cable system

    • Off-shore platforms

    • Off-shore transmission

  • Automated design of inter-array cable system and VUI for correcting such designs.

  • Catalogue of components.

  • Creating of network models and possibility of merging them.

  • Cable sizing.

  • Voltage/reactive power control.

  • Electrical losses.

  • Reliability.

  • CAPEX and OPEX evaluation.


  • Innovative automation of electrical design of off shore windfarms to find the least cost option

    Interactive tool for creating/editing inter-array cable system.

    Multiple projects.

    Restructure string,

    change string origin,

    shift platform,

    swap strings

    between platforms

    Find and correct cable

    crossovers

    Information on the

    selected project

    Adding/editing

    cable knee points

    Visualisation User Interface (for modifications of inter-array cable design)


    Proving the software tool by practical application

    Proving the Software Tool by Practical Application

    Driven by projects / clients and cooperation with the UK Universities

    • HornSea (over 10 different transmission options with sensitivity analyses)

    • Seagreen (4 different transmission options and a number of sensitivity analyses)

    • UoM Electrical Engineering – research project and a PhD to assess thousands of electrical designs for different offshore wind farm sizes

    • University of Strathclyde – Industry supervision of a 4 year PhD on transmission options in North-Sea. The research will be conducted using the tool.

    • Dogger Bank - Inter array cable design (over 80 layouts – capacity ranging from 7GW to 20 GW)

    • Availability calculations:

      • London Array

      • Greater Gabbard


    Case study 1 comparison of edge vs central location

    Case Study 1: Comparison of Edge- vs Central- location

    Centrally Located option (CLo)

    Edge Mounted option (EMo)

    Each platform 600 MW, 18 strings per platform

    (14 of 5WTGs strings and 4 of 4WTG strings).


    Case study 1 comparison of edge vs central location1

    Case Study 1: Comparison of Edge- vs Central- location


    Case study 2 illustrative comparison of design options based on publicly available data

    Case Study 2: Illustrative Comparison of Design Options Based on Publicly-Available Data

    Investment Cost in £ (Millions)

    Cost figures for illustrative purposes only!


    Case study 2 illustrative comparison of design options based on publicly available data1

    Case Study 2: Illustrative Comparison of Design Options Based on Publicly Available Data

    • Case 1 and Case 3 use the same electrical components -> losses are same

    • Case 2 has least electrical losses as no HVDC conversion equipment and good reliability because of the 3 x HVAC shore connections

    • Case 3 has least reliability losses due to redundant string connections

    • Case 4 has most electrical losses as longest string cables, but the least Investment Cost as the quantity of higher gauge cables is less

    • This demonstrates that the differences in Investment are swamped by the differences in Costs of Losses during operation


    Conclusions

    Conclusions

    • This automated approach significantly reduces the time for manual and visual inspection / verification of the proposed cabling system for the layouts

    • Risk of human errors is significantly reduced and re-verifications / inspections can be quick and efficient

    • Effortlessly and quickly design and undertake cost benefit analyses of preferred options.

    • Possibility to merge network models for cost benefit analyses of the off-shore grid.

    • Complex design solutions can easily be compared (both construction and operation) using the most significant comparator: cost


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