1. Annual Review Meeting of SC activities October 4, 2009 Toronto Study Committee C4 System Technical Performance Danielle McNabb, Hydro-Québec -TransÉnergie

2. 2 C4 System Technical Performance  SC C4 Annual 2009 Meeting: Held in Kuschiro Japan, June 12th, 2009 Held in Kuschiro Japan, June 12th, 2009  Revised scope: SC C4 is responsible for methods and tools for analysis related to power systems, with particular reference to dynamic and transient conditions and to the interaction between the power system and its apparatus/sub-systems, between the power system and external causes of stress and between the power system and other installations. Specific issues related to the design and manufacturing of components and apparatus are not in the scope of SC C4, apart from those cases in which component/apparatus/subsystem behavior depends on, or significantly interacts with, the performance of the nearby power system.

3. 3 SC Subject Area: → Power Quality → PQ contracting; Reliability improvement assessment; Sustainable technical performance – measures and reporting. → EMC/EMI → Influence of power installations on other installations; The ELF magnetic fields: characteristics and mitigation methods; EM vulnerability. → Insulation coordination → Critical review of existing practice; UHV systems; Oil filled transformers; Fast transients: interaction between system and transformers. → Lightning → Critical review of lightning parameter; statistics; attachment process; correlation between lightning and voltage dips; protection of wind generators → “Transversal” subjects → Advanced theories/tools for surge propagation studies and for dynamic performance assessment. Power systems dynamic performance models and analysis →Tools for power balancing assessments; Risk-based security assessment.

4. 4 C4 System Technical Performance : AG ’s Chairman C. A. Nucci (IT) AG C4.5 "Transversal subjects" M.T. Correia de Barros 3WGs Secr. P. Pourbeik (USA) AG C4.1 Power Quality ____ R. Koch (SA) ________ 6 WGs 3 TFs AG C4.1 Power Quality ____ R. Koch (SA) ________ 6 WGs 3 TFs AG C4.2 EMC/EMF ____ J. Hoeffelman (BE) _____ 3 WGs AG C4.2 EMC/EMF ____ J. Hoeffelman (BE) _____ 3 WGs AG C4.3 Insulation coordination ____ C. Neumann (DE) ____________ 4 WGs AG C4.3 Insulation coordination ____ C. Neumann (DE) ____________ 4 WGs AG C4.4 Lightning ____ M. Ishii (JP) __________ 5 WGs AG C4.4 Lightning ____ M. Ishii (JP) __________ 5 WGs AG C4.6 Power System Security Assessment ____ K. Uhlen (NO) ________ 2 WG 4 TF AG C4.6 Power System Security Assessment ____ K. Uhlen (NO) ________ 2 WG 4 TF

5. 5 C4 – Current Activities 26 active Working Bodies: 26 active Working Bodies: 23 WGs: six on Power Quality, three on EMC/EMI four on Insulation Coordination, five on Lightning, three on "Transversal Subjects", two on Power System Security, 1 is a joint WG with SC A2 on insulation coordination issues (JWG A2/C4.309) In addition to the Six Advisory Groups

6. 6 AG C4.1 Power Quality 105 Benchmarking PQ Perform. Trans. syst.. (M. McGranaghan) 107 Economic Framework (J.L. Gutierrez Iglesias) 108 Review of Flicker Objectives (M. Halpin) 2nd draft 110 110 Voltage Dip Equip. Immunity (M. Bollen) completed Work to start in 2010 109 Emission Assessment Meth. (E. De Jaeger) Draft 5 2009 2010 2009 2009 2009 - Temporary Over-voltages - Power Quality improvement programs - - System PQ performance measurement and assessment - - No new TOR in 2009 to complete work in progress - Temporary Over-voltages - Power Quality improvement programs - - System PQ performance measurement and assessment - - No new TOR in 2009 to complete work in progress ►Not progressing►Not progressing ►Progressing according to schedule►Progressing according to schedule ►Work completed – to be disbanded►Work completed – to be disbanded Canadian member

7. 7 Deliverables: JWG C4.105: “Guidelines for benchmarking technical performances in transmission systems” WG not progressing JWG C4.107:“Economic Framework for PQ” 2 CIRED Papers (May 2007) Expected completion date - Dec 2009. TF C4.108: CIGRE report “Review of flicker objectives in EHV/HV/MV&LV systems” 2 st draft completed, meeting held with C4.109 CIRED paper 2009 JTF C4.109: CIGRE report “ Emission Assessment Techniques for Harmonics, Flicker, and Unbalance” Drafts Version 5 of Harmonics and Flicker, Unbalance to be Developed, CIRED paper June 2009 WG C4.110: CIGRE report “Dip immunity of equipment in Installations” 7 conference publications, Work completed, CIGRE report will be available on CIGRE website AG C4.1 - Power Quality

8. 8 AG C4.2 EMC/EMF JWG C4.202 EMC with communication circuits, LV systems and metallic structures (L.E. Juhlin) JWG C4.202 EMC with communication circuits, LV systems and metallic structures (L.E. Juhlin) TF C4.203 ELF field measurement techniques (F. Deschamps) TF C4.203 ELF field measurement techniques (F. Deschamps) TF C4.204 Magnetic Field Mitigation Techniques (E. Salinas) TF C4.204 Magnetic Field Mitigation Techniques (E. Salinas) 2009 2009 2009 WG C4.206 Protection of Control electronics against intentional Electromagnetic interference (W. Radasky USA) WG C4.208 EMC requirements and solutions for HV substations (W.H. Siew (UK) WG C4.207 EMC of com. circuits, low voltage systems and metallic structures in the vicinity of power systems (D. Thomas (UK) WG C4.207 EMC of com. circuits, low voltage systems and metallic structures in the vicinity of power systems (D. Thomas (UK) 2012 2011 2011

9. 9 Deliverables : WG C4.202 : Guide for “Measurement of Radio frequency Interference from HV and MV substations” published (2009) WG disbanded WG C4.203 : Guide for “Measurement of low frequency electric and magnetic fields near overhead power lines” approved and published (April 2009) WG disbanded WG C4.204 : Guide for “Mitigating Techniques of Power Frequency magnetic Fields originating from Electric Power Systems” approved and published (Feb 2009) WG disbanded AG C4.2 - EMC

10. 10 AG C4.3 Insulation Coordination WG C4.301 Procedures for station and OHL insulation coordination (A. Xémard) WG C4.301 Procedures for station and OHL insulation coordination (A. Xémard) WG C4.302 Insulation Coordination related to internal insulation SF6 & N2/SF6 GIS (G. Muhr) To be disbanded WG C4.302 Insulation Coordination related to internal insulation SF6 & N2/SF6 GIS (G. Muhr) To be disbanded WG C4.303 Pollution and Environmental Influences on Electrical Performance of systems (C. Engelbretch, Nl) WG C4.303 Pollution and Environmental Influences on Electrical Performance of systems (C. Engelbretch, Nl) 2007 JWG A2-C4.39 Electrical Transient Interaction between Transformers and the Power System (A. da Costa oliveira Rocha) JWG A2-C4.39 Electrical Transient Interaction between Transformers and the Power System (A. da Costa oliveira Rocha) 2008 WG C4.306 Insulation Coordination for UHV AC Systems (Eiichi Zaima, JP) WG C4.306 Insulation Coordination for UHV AC Systems (Eiichi Zaima, JP) 2009 2009 New WG A2-C4.307 Resonance and Ferroresonance in Power Networks and Transformer Energization Studies Foreseen convener: L. Kocis (CS) New WG A2-C4.307 Resonance and Ferroresonance in Power Networks and Transformer Energization Studies Foreseen convener: L. Kocis (CS) 2010

11. 11 Deliverables : WG C4.301 : A pplication guide for line arresters, Final version availlable WG C4.302 : Paper published in 2008: Insulation coordination in SF 6 and N 2 /SF 6 WG C4.303 : Brochure “Outdoor Insulation in Polluted Conditions : Guidelines for selection and dimensioning- Part 1 General Principles and AC case“ Just published and can be downloaded from CIGRE website Brochure part 2: DC case - Paper in progress WG C4.307 Study of resonance and ferro-resonance. Draft under preparation, started under WG.301. Was transferred to new WG, TOR circulated. AG C4.3 - Insulation Coordination

12. 12 WG C4.408 Lightning Protection of Low-Voltage Networks (A.Piantini, Brazil) WG C4.408 Lightning Protection of Low-Voltage Networks (A.Piantini, Brazil) AG C4.4 Lightning WG C4.401 Lightning (C.A. Nucci) Disbanded WG C4.401 Lightning (C.A. Nucci) Disbanded JWG C4.402/Cired 05 Protection of MV and LV networks against lightning (F. Rachidi) Disbanded JWG C4.402/Cired 05 Protection of MV and LV networks against lightning (F. Rachidi) Disbanded WG C4.404 Lightning Location System Data for Engineering Applications (G. Diendorfer& H. Torres) WG C4.404 Lightning Location System Data for Engineering Applications (G. Diendorfer& H. Torres) WG C4.407 Lightning Parameters for Engineering Applications (V.A. Rakov) WG C4.407 Lightning Parameters for Engineering Applications (V.A. Rakov) TF C4.405 Lightning interception (V. Cooray & T. Shindo) TF C4.405 Lightning interception (V. Cooray & T. Shindo) TF C4.406 Performance of grounding electrodes for lightning currents (S. Visacro) Disbanded TF C4.406 Performance of grounding electrodes for lightning currents (S. Visacro) Disbanded 2007 2009 2008 WG C4.409 Lightning Protection of Wind Turbine Blades (S. Yokoyama, Japan) WG C4.409 Lightning Protection of Wind Turbine Blades (S. Yokoyama, Japan) 2009

13. 13 Deliverables : WG C4.401: “ Lightning-Induced Voltages on Overhead Power Lines – Part IV “ Application of theory to distributed lines ” completed WG C4.402: Protection of MV and LV networks against Lightning – Part 2 completed. WG C4.404: Report: Cloud-to-Ground Lightning Parameters Derived from Detection Systems – The effects of System Performance ”. Comprehensive publication with 168 references WG C4.405: Lightning Interception – Survey on literature - Report under preparation, Document on ESE devices Report under preparation WG C4.406: Electra paper on “ Performance of Transmission Lines Grounding Electrodes for Lightning Currents ” in print WG C4.407: Lightning Parameters for Engineering Applications WG C4.408: Protection against Lightning of LV networks – Kick off meeting in Curitiba Brazil in Nov. 2009 WG C4.408: Protection against Lightning of Wind Turbine Blades – Kick off in Kushiro June 2009, next meeting in Curitiba Brazil in Nov. 2009 AG C4.4 - Lightning

14. 14 AG C4.5 "Transversal subjects" WG C4.501 Numerical Electromagnetic Analysis Method and Its Application to Surge Phenomena (Akihiro Ametani, Jp) WG C4.501 Numerical Electromagnetic Analysis Method and Its Application to Surge Phenomena (Akihiro Ametani, Jp) JWG C4.502 Power System Technical Performance issues Related to the Application of Long HVAC Cables (W. Wiechowski, Dk) JWG C4.502 Power System Technical Performance issues Related to the Application of Long HVAC Cables (W. Wiechowski, Dk) 2009 2009 JWG C4.503 Lightning performance of overhead lines (45 - 700 kV) Convener: M.T. Correia de Barros (Portugal) JWG C4.503 Lightning performance of overhead lines (45 - 700 kV) Convener: M.T. Correia de Barros (Portugal) JWG C4.504 Numerical techniques for the computation of power systems, from steady-state to switching transients (J. Mahseradjian, Ca) TOR for approval JWG C4.504 Numerical techniques for the computation of power systems, from steady-state to switching transients (J. Mahseradjian, Ca) TOR for approval 2010 2010

15. 15 AG C4.5 "Transversal subjects" Future work of new WG C4.503 Lightning performance of overhead lines (45 - 700 kV) Convener: M.T. Correia de Barros (Portugal) Objective: update CIGRÉ Monograph 63 (*) (dated October 1991) (*)“GUIDE TO PROCEDURES FOR ESTIMATING THE LIGHTNING PERFORMANCE OF TRANSMISSION LINES”

16. 16 AG C4.6 Power Systems Dynamic Performance Models and Analysis WG C4.604 Modeling and aggregation of loads in flexible power networks (J. V. Milanović, UK) WG C4.604 Modeling and aggregation of loads in flexible power networks (J. V. Milanović, UK) Joint WG B4/C4 Extended use of DC Impact of HVDC Transmission Embedded in an AC Network. (Convener not decided) Joint WG B4/C4 Extended use of DC Impact of HVDC Transmission Embedded in an AC Network. (Convener not decided) WG C4.601 Power systems security assessment (2004-20080 (P.Pourbeik) WG C4.601 Power systems security assessment (2004-20080 (P.Pourbeik) WG C4.603 Analytical Techniques and Tools for Power Balancing Assessments (K. Ulhen, Nw) WG C4.603 Analytical Techniques and Tools for Power Balancing Assessments (K. Ulhen, Nw) 2009-2010 2009 2009 2004-2008

17. 17 Deliverables: in the last 2 years "Modeling and Dynamic Performance of Wind Generation as it Relates to Bulk Power System Control and Dynamic Performance”, by WG C4.601. "Wide-Area Monitoring and Control for Transmission Capability Enhancement”, by WG C4.601. "On-Line Power system Security Assessment Tools and Techniques: Application of Intelligent Technologies”, by WG C4.601. "Coordinated Voltage Control in Transmission Networks", by TF C4.602. "Review of potential tools and techniques for risk based and probabilistic planning in power systems”, by WG C4.601 – To be published 2009 AG C4.6 Power System Security Assess nt.

18. 18 SC C4 System Technical Performance Preferential Broad Subjects 2010 Preferential Broad Subjects 2010   EMC/EMF and Power Quality for future networks – compatibility requirements, assessment techniques/tools and technical performance improvement programs;   Advances in Insulation coordination and Lightning knowledge for improved performance of EHV-UHV power systems;   Advanced techniques and Tools for Power balancing assessments and Risk-based security assessment Next SC4 meetings: Next SC4 meetings: Sept. 2010 in Paris. Sept. 2010 in Paris. Prospective for 2011 SC4 meeting - Recife Brazil Prospective for 2011 SC4 meeting - Recife Brazil

19. 19 Thank You for Your Attention! Questions?