The proposed 43-50 steel terminal structure also required slight modification from the original design to achieve satisfactory design capacity under the applied loading. Strengthened designs using various combinations of stays, stay positions and pole thicknesses where analysed until a final design for each structure was determined. Our initial investigation showed that standard thickness poles of the 43-50 structure design would not be suitable for this location. Loading criteria have been derived from British Standard EN5:2001 UK NNA and applied in the analysis, which has been carried out using industry standard PLS CADD software. Section 3 of this document details the approach taken to validate the suitability of the structures, outlining the climatic and geographical conditions considered. The proposed structures to be used for this connection are based on the Electricity Networks Association (ENA) 43-50 trident wood pole design using 175 ACSR Lynx as the conductor. Summary 1.1 This document describes the design assessment carried out on the proposed single circuit overhead line connection between the planned wind farm at Maesgwyn and existing tower D32. GlossaryĪppendices Appendix A – PLS Pole Analysis summary Appendix B – PLS Tower Analysis summary Appendix C – PLS CADD screen prints Appendix D – Pole informationġ. 7 3.6 BS EN 50341 Probabilistic Loading Criteria.
6 3.5 Maintenance Loads & Failure containment Loads. 6 3.4 Conductor tensioning basis options. Maesgwyn 132 kV loading criteria 4 5 6ģ.1 Line Location and configuration. This report is not intended for and should not be relied upon by any third party and no duty of responsibility (including in negligence) is accepted by LSTC in relation to any third party. LSTC disclaims all liability of any nature whatsoever to any such third party in respect of this report. This report is not intended to confer any rights on any third party pursuant to the Contracts (Rights of Third Parties) Act 1999. This report may not be assigned to any third party without the express written consent of LSTC LS Transmission Consultancy Limited makes no warranties, express or implied, that compliance with this document would in itself be sufficient to ensure safe systems of work or operation. Users are reminded of their own duties under health and safety legislation.ġ. If LSTC consents to the reproduction of this report then it may only be reproduced once in whole and not part. This report is for the private and confidential use of the Client and should not be reproduced in whole or in part without the express written consent of LSTC. LSTC will not be liable to the Client for any use of this report for any purposes other than those for which this report was produced.
VAT No: 772401446Ĭopyright: LSTC This report has been prepared by LS Transmission Consultancy Limited (“LSTC”) on behalf of Western Power Distribution (“the Client”) in connection with the detailed assessment of the Maesgwyn proposed wind farm connection and takes into account their particular instructions and requirements. LSTC is a trading name of LS Transmission Consultancy Limited, Yorkshire House, York Road, Little Driffield, Driffield, East Yorkshire, YO25 5XA. Issue to WPD Stays removed structures D32B & D32J Revised for IPC submission Amended to reflect IPC and WPD requirements Minor corrections Review History APFP 2009 Reg 5(2) Ref: Author: Reviewed:Įur Ing Peter Papanastasiou B Sc (Hons) C Eng MICE Graham Young B Sc (Hons) C Eng MICE REPORT ON PLS ANALYSIS OF TOWER D32 AND TRIDENT WOOD POLE CONNECTION STRUCTURES 132 kV OVERHEAD LINE TO MAESGWYN WIND FARM
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