Advancing Rotating Electrical Machines: Insights from 2023 CIGRE Canada Update Meeting

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Delve into the recent discussions and strategic directions outlined at the 2023 CIGRE Canada Study Committees Update Meeting, with a focus on the Study Committee A1 for Rotating Electrical Machines. Explore key objectives, preferential subjects, and the active involvement of experts from around the globe in advancing the field of electrical rotating machines. Discover initiatives to enhance efficiency, asset management, machine/system interaction, renewable generation, and more.


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  1. Study Study Committee Committee Update Meeting Update Meeting A1 Rotating Electrical Machines A1 Rotating Electrical Machines Canadian Representative: Dr Arezki Merkhouf Canadian Representative: Dr Arezki Merkhouf Presented Presented by: Dr Arezki Merkhouf by: Dr Arezki Merkhouf 2023 CIGRE Canada Study Committees Update Meeting September 27

  2. 2 Study Committee Introduction Scope Study Committee A1, dealing with Rotating Electrical Machines, promote the progress of engineering and the international exchange of information and knowledge in the field of electrical rotating machines SC A1 is active in the areas of Turbo-Generators, Hydro-Generators, Large Motors, High Efficiency Motors and New Technologies Material presented by Canadian representative or delegate Strategic Direction Create greater awareness of study committee activities in Canada Generate interest and promote Study Committee work Involve a broader audience 2023 CIGRE Canada Study Committees Update Meeting September 27

  3. Objectives of the study committee Strategic Direction SC A1 has 24 regular members, 13 observer members, 8 technical advisors, chairman and secretary and around 400 experts from 41 countries contributing to A1 activities and attending A1 meetings and colloquiums. Members of our Study Committee are from Utilities, Manufacturers, Consultants, Universities; The activities of the Study Committee have been driven by the following six key main Strategic Directions: SD 1: Asset Management SD 2: Machine/System Interaction SD 3: Renewable Generation SD 4: Large Motors SD 5: Machine Monitoring, Diagnosis and Prognosis SD 6: Efficiency of Electrical Machines Research Centers and 2023 CIGRE Canada Study Committees Update Meeting September 27 3

  4. Preferential Subjects PS 1:Rotating electrical machines and the energy transition Impact od the energy transition, flexible operation of rotating machines Changing requirements on rotating machines to support evolution of smart grid Update of international standards for electrical machine requirements to reflect future applications PS 2: Evolution and development Developments in the design of generator for new application such as wind turbine , synchronous compensators and variable speed pump storage Improvements in design, manufacture, efficiency, insultation, cooling, bearing and materials Design evolution of rotating electrical machines based on operational experience PS 3:Keeping the lights on Condition monitoring, diagnosis, prognosis of rotating electrical machines including the use of artificial intelligence, deep learning techniques and digital twin concept Ensuring power supply reliability by asset management of installed bas and maintenance practices 2023 CIGRE Canada Study Committees Update Meeting September 27 4

  5. Canadian Technical Activities Relevant activities Meetings from 10 to 15 September 2023 in Japan, including working groups and symposium on electrical machines Next meeting in Paris September 2024 (working groups and symposium) Current Working Groups of interest for Canada WG A1.42-Influence of Key Requirements to Optimize the Value of Hydro-Generators WG A1.43 State of the art of rotor temperature measurement WG A1.55-Survey on Split Core Stators WG A1.56-Survey on Lap and Wave Winding and Their Consequences on Maintenance and Performance WG A1.59-Survey on Cutting Out Coils WG A1.60-Guide on economic evaluation for refurbishment or replacement decisions on hydro generators WG A1.62-Thrust bearings for Hydropower - a Survey of known Problems and Root Causes A1.63 Turbo Generator Stator Winding Bushings Field Experience, Failures and Design Improvements WG A1.67 -State of the Art in methods, experience and limits in end winding corona testing for Hydro Generators WG A1.69- Hydro-Generator Excitation Current Anomalies WG A1.70-Dielectric Dissipation Factor Measurements on Stator Windings 2023 CIGRE Canada Study Committees Update Meeting September 27 5

  6. Canadian Technical Activities ( next) Relevant activities WG A1.71-Survey on damper-winding Concepts and its operational experience on hydro generators and motor-generators WG A1.72- Survey on multi-turn coils with dedicated turn insulation versus coils without dedicated turn insulation WG A1. 73- Customer Requirements for Qualification of Form Wound Stator Insulation Systems for Hydro Generators WG A1.75-Large air-cooled turbo-generator state of the art, limits and perspectives for Small Modular Reactors WG A1.76 Study on Eco-Design, Circular economy and impacts on generator production process WG A1.64- Guide for evaluating the Repair /replacement of Standard Efficiency Motors WG A1.77- Survey on insulation reliability of induction and synchronous motors WG A1.74- Evaluating quality of large electric motors used in power generation plant WG A1.61 Survey of partial discharge Monitoring in Large Motors WG A1.45- Guide for determining the Health index of large electrical motors 2023 CIGRE Canada Study Committees Update Meeting September 27 6

  7. Recently Published Reports Brochures TB 915 Survey on Industry Practices and Effects Associated with the Cutting Out of Stator Coils in Hydro generators TB 813 Magnetic core dimensioning limits in hydro generators TB 769 Dielectric dissipation factor measurements on new stator bars and coils TB 772 Turbogenerator stator windings support system experience TB 774 State of the art of stator winding supports in slot area and winding overhang of hydro generators TB 776 Factory quality assurance testing requirements for turbo- generator components - stator bars WG - Publication in Electra Month/Year No specific publications Brochures of particular interest for the last two years All described in the first bullet 2023 CIGRE Canada Study Committees Update Meeting September 27 7

  8. Proposed New Working Groups Proposed new Working Groups WG A1.76 Study on Eco-Design, Circular economy and impacts on generator production process WG A1.75-Large air-cooled turbo-generator state of the art, limits and perspectives for Small Modular Reactors WG A1.72- Survey on multi-turn coils with dedicated turn insulation versus coils without dedicated turn insulation WG A1.67 -State of the Art in methods, experience and limits in end winding corona testing for Hydro Generators Proposed new Task Forces No proposed new Task Forces 2023 CIGRE Canada Study Committees Update Meeting September 27 8

  9. Canadian Highlights Open slide for the Canadian Representative to highlight Specific areas of note Charles Millet, Jemimah and Arezki Merkhouf publication of Brochure TB-915 Industry Practices and Effects Associated with the Cutting Out of Stator Coils in Hydro generators Jemimah Akiror and Arezki Merkhouf - Tutorial on Charles Millet Convener of WG A1.59 Survey on Industry Practices and Effects Associated with the Cutting Out of Stator Coils in Hydro generators Yoon Duk Seol-Convener of WG A1.72 Survey on multi-turn coils with dedicated turn insulation versus coils without dedicated turn insulation Possible organization of the next SC A1 Meeting (2025) in Canada The next meeting for 2025 can not be hold in Russia The study committee A1 is looking for new location Need to have proposal for the next meeting 2025 in Canada as soon as possible Need to have Approval from CIGRE Canada Need to have support from Hydro Quebec and other utilities in Canada ETS (university) in Montreal can provide the Amphitheatre and facilities for this Meeting Evaluate the possibility to Combine the vvent with CIGRE Canada in September 2025 2023 CIGRE Canada Study Committees Update Meeting September 27 9

  10. Canadian Representative Name Company: Hydro-Quebec, research institute of Hydro Qu bec Title: senior researcher, PhD Email: merkhouf.arezki@hydroquebec.com Phone: +1 450 652 8051 Cell: +1 514 895 8051 2023 CIGRE Canada Study Committees Update Meeting September 27 10

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