2. 1 Study Committee Representatives Annual Meeting October 19, 2008 Winnipeg SC B2 “Overhead Lines” Activity Report Presented by: Zibby Kieloch (Manitoba Hydro)

3. 2 SC B2 Overhead Lines Subject Area Design, construction and operation of overhead lines including the mechanical and electrical (in cooperation with SC C3 & SC C4) design of line components (conductors, ground wires, insulators, accessories, structures and their foundations). Validation tests, studies of in service performance, assessment of the state of line components and elements. Maintenance, refurbishment, upgrading, and uprating of overhead lines.

4. 3 SC B2 Overhead Lines Membership 24 Regular Country Members (including Canada) 12 Observer Country Members Canadians On SC B2 32 Canadians in various groups (total number of technical experts from all countries: 200+) 4 new Canadian experts added last year Canada is represented on all but one Working Group Mr. Normand Bell (Hydro-Quebec) – SC B2 Secretary 3 Canadians as Convenors of Working Groups

5. 4 SC B2 Overhead Lines Structure - General New structure introduced in 2008: Convenor and Secretary 7 New Advisory Groups: 4 Technical 3 Supporting: Strategic, Customer, Publications & Tutorials Disbanded most of the existing Working Groups (upon completion of work) Created 22 new Working Groups with narrow focus Eliminated existing Task Force groups

6. 5 SC B2 Overhead Lines Structure - Technical Groups AG B2.04 Electrical Performance Advisory Group TF B2.20 “Management of risks due to load-flow capacity increases in transmission overhead lines” WG B2.26 “A guide to evaluating and accepting new types of overhead conductor including those running at high temperature” WG B2.36 “Guide for application of direct real time monitoring systems on overhead transmission lines” WG B2.38 “Evaluation of high surge impedance load solutions for increased natural capacity for OHL”

7. 6 SC B2 Overhead Lines Structure - Technical Groups AG B2.05 Towers, Foundations and Insulators Advisory Group WG B2.08 “Transmission Line Structures” (soon to be disbanded and replaced by 2 new Working Groups) WG B2.21 “Arc protection and diagnosis for composite string insulators ” WG B2.23 “Geotechnical and structural design of the foundations of HV & UHV Lines ”

8. 7 SC B2 Overhead Lines Structure - Technical Groups AG B2.06 Mechanical Behaviour Of Conductors and Fittings Advisory Group WG B2.25 “Preparatory studies on specifications for revision of IEC testing of self damping and conductor fatigue characteristics (new IEC Spec.), for high temperature fittings (IEC 61284), for tests on spacers (IEC 61854) and on dampers (IEC 61897)” WG B2.30 “Engineering guidelines relating to fatigue endurance capability of conductor/clamp systems” WG B2.31 “Modeling of aeolian vibration of single conductors”

9. 8 SC B2 Overhead Lines Structure - Technical Groups AG B2.06 Mechanical Behaviour Of Conductors and Fittings Advisory Group (cont’d) WG B2.32 “Assessing the performance of aged fittings: testing, acceptance criteria & recommendations for HV & UHV lines” WG B2.33 “Guidelines for cable cart/trolley (cycling) safety on old conductors (earthwires) equipped with aircraft warning markers (and other fittings)”

10. 9 SC B2 Overhead Lines Structure - Technical Groups AG B2.07 Asset Management, Reliability and Availability Advisory Group WG B2.16 “Meteorology for overhead lines” (soon to be disbanded and replaced by a new Working Group) WG B2.22 “Mechanical security of overhead lines with effective failure containment measures: design loading cases and strategies for effective anti-cascading supports” JWG B2/B3.27 “Live-Line Maintenance - A Management Perspective”

11. 10 SC B2 Overhead Lines Structure - Technical Groups AG B2.07 Asset Management, Reliability and Availability Advisory Group (cont’d) WG B2.29 “Anti- and de-icing systems for HV and UHV overhead lines” WG B2.34 “The impact of line configurations on electric and magnetic fields, radio interference and audible noise for 800 and 1000 kV OHL” WG B2.39 “Validation of design guidelines implemented for High Intensity Winds (HIW)”

12. 11 SC B2 Overhead Lines Structure - Technical Groups AG B2.07 Asset Management, Reliability and Availability Advisory Group (cont’d) WG B2.40 “Calculations of the electrical distances between live parts and obstacles for OHL: Preparatory studies for revision of IEC standards (IEC 61865, IEC 60826, EN 50341)”

13. 12 SC B2 Overhead Lines Structure - Technical Groups Special Technical Groups JWG B2/B4/C1.17 “Impacts of HVDC Lines on Economics of HVDC Projects” JTF B2/D2.18 “Overhead lines geographical and asset information system” JWG B2/C1.19 “Increasing capacity of overhead lines - needs and solutions”

14. 13 SC B2 Overhead Lines Meetings CIGRÉ 2008 Paris Session Working Group Meetings:August 22-28, 2008 SC B2 Open Session:August 26, 2008 2 Preferential Subjects: “Increasing capacity of overhead lines” “Solutions to improve the availability of overhead lines” 27 Technical Papers Technical Meeting:August 27, 2008 Administrative Meeting:August 28, 2008

15. 14 SC B2 Overhead Lines Meetings Next SC Meeting October 2009 in Seoul, Korea

16. 15 SC B2 Overhead Lines Main Achievements in 2007-2008 Publications: SC B2 was the most productive among all 16 CIGRÉ Study Committees. A total of 11 Electra articles and 10 Technical Brochures were produced in 2007-2008. TB 322 / ELT 232_3 “State of the art of conductor galloping” TB 324 / ELT 232_4 “Sag-tension calculations for overhead lines” ELT 232_2 “Generic specification for an ideal load control device” TB 333 / ELT 234_3 “Guide for the establishment of naturally polluted insulator testing stations” TB 331 / ELT 234_4 “Considerations relating to the use of high- temperature conductors”

17. 16 SC B2 Overhead Lines Main Achievements in 2007-2008 Publications (cont’d): TB 332 / ELT 234_5 “Fatigue endurance capability of conductor/clamp systems - update of present knowledge” TB 344 / ELT 237_5 “Big storm events - what we have learned” TB 345 / ELT 237_6 “Alternating current (AC) resistance of helically stranded conductors” TB 348 / ELT 238_4 “Tower top geometry and mid span clearances” TB 350 / ELT 238_5 “How overhead lines (OHL) respond to localized high intensity winds - basic understanding” TB 353 / ELT 239_3 “Guidelines for increased utilization of existing overhead transmission lines”

18. 17 SC B2 Overhead Lines Expected Key Deliverables in 2009-2010 Expected Publications: “Guidelines for evaluating special topographical effects in determining wind speed for design of overhead lines” “Probabilistic design of foundations” “Failure load of OHL steel towers considering the variation of mechanical properties” “Innovative solutions for overhead line supports” “Comparison of general practices for lattice tower design and detailing” “Discrepancies between predicted and measured values of load in members of towers during tests; influence of the hyperstatic modeling on the behaviour of transmission line lattice structures”

19. 18 SC B2 Overhead Lines Expected Key Deliverables in 2009-2010 Expected Publications (cont’d): “Improvement on the methodology of tower testing” “Large overhead line crossings” “Impacts of HVDC Lines on Economics of HVDC Projects” “Guidelines for cable cart/trolley (cycling) safety on old conductors (earthwires) equipped with aircraft warning markers (and other fittings)” “Assessing the performance of aged fittings: - Testing, acceptance criteria & recommendations for HV & UHV Lines” “Aeolian Vibrations of Single Conductors Strung at Relatively High Tensile Load. Application to HV & UHV Lines”