Agenda

Updated the September 26, h 19:50

Moderated by Mladen Banovic – Editor-in-Chief at Transformers Magazine (Croatia)

Schedule of October 3​

08:45 – 09:00 am
Registration (welcome coffee)
09:00 am – 09:10 am

Agnelli Room

Introduction
Cristina_Tumiatti2021_1
Cristina Tumiatti

Business development excecutive - Sea Marconi (IT)

09:10 am – 09:30 am

Agnelli Room

Keynote speech: Sustainable opportunities towards clean energy
*** Viktor Sokolov Award ***

#Sustainability #Asset #Risk #Solutions

_DSC4221
Vander Tumiatti

General partner and Founder of Sea Marconi (Italy)

09:30 – 09:50 am

Agnelli room

General Session

For reliable operation of oil-filled electrical equipment monitoring and maintenance of insulating liquid is essential. Mineral insulating oil is the most widely used insulating liquid for cooling and insulation in oil-filled electrical equipment. The characteristics of the oil, as supplied as unused, may change during service life. Therefor, the oil quality should be monitored regularly during its service life. In many countries power companies and electrical power authorities have established codes of practice for this purpose. In general these cover monitoring guidelines and corrective actions depending on the oil status. If a certain amount of oil deterioration exceeded then the possibility and risk of premature failure should be considered. While the quantification of the risk can be very difficult, a first step involves the identification of potential effects of increased deterioration. IEC60422 is guide for supervision and maintenance of mineral insulating oils. This standard is now revised to take account of changes in oil and equipment technology and have due regards for the best practice currently in use worldwide. Changes are also made to use current methodology and comply with requirements and regulations affecting safety and environmental aspects.

For reliable operation of oil-filled electrical equipment monitoring and maintenance of insulating liquid is essential. Mineral insulating oil is the most widely used insulating liquid for cooling and insulation in oil-filled electrical equipment. The characteristics of the oil, as supplied as unused, may change during service life. Therefor, the oil quality should be monitored regularly during its service life. In many countries power companies and electrical power authorities have established codes of practice for this purpose. In general these cover monitoring guidelines and corrective actions depending on the oil status. If a certain amount of oil deterioration exceeded then the possibility and risk of premature failure should be considered. While the quantification of the risk can be very difficult, a first step involves the identification of potential effects of increased deterioration. IEC60422 is guide for supervision and maintenance of mineral insulating oils. This standard is now revised to take account of changes in oil and equipment technology and have due regards for the best practice currently in use worldwide. Changes are also made to use current methodology and comply with requirements and regulations affecting safety and environmental aspects.

#Asset #Solutions

Bruce-Pahlavanpour-interview
Dr Bruce Pahlavanpour

Senior consultant - Ergon International (UK)

09:50 – 10:10 am

Agnelli room

General Session

#Asset # Risk #Solutions

salomone franco fm global
Franco Salomone

Operations Chief Engineer - FM Global

10:10 – 10:.30 am

Agnelli room

General Session

The carbon footprint of transformers during the life cycle, including raw materials, production, and operation stages has been analyzed. As the largest contributor to carbon footprint, the steel industry is discussed in detail. The current investments and commercial offerings for green steel are presented. The enormous challenges, the steel industry faces to reach carbon neutral status in 2050 and the revolutionary changes in steel making process are discussed. The same points are also presented for the copper, aluminum, and oil industries. Some sample carbon footprints of different transformer types (LPT, SPT, DT with copper or aluminum) are also included. As the last point, it is discussed how the transformer industry could contribute to decarbonization efforts in their factories and during the operation stage of the transformers and some suggestions have been made.

The carbon footprint of transformers during the life cycle, including raw materials, production, and operation stages has been analyzed. As the largest contributor to carbon footprint, the steel industry is discussed in detail. The current investments and commercial offerings for green steel are presented. The enormous challenges, the steel industry faces to reach carbon neutral status in 2050 and the revolutionary changes in steel making process are discussed. The same points are also presented for the copper, aluminum, and oil industries. Some sample carbon footprints of different transformer types (LPT, SPT, DT with copper or aluminum) are also included. As the last point, it is discussed how the transformer industry could contribute to decarbonization efforts in their factories and during the operation stage of the transformers and some suggestions have been made.

#Sustainability #Asset # Risk #Solutions

ufuk kivrak
Ufuk Kivrak

Managing Director - SCM Consulting GmbH (Switzerland)

10:30 – 10:50 am

Agnelli room

Case Study

Transformers operators usually expect long operational life for new units they purchase for their networks. Unfortunately, they can be sometimes badly disappointed when these transformers fail after just few years in service.
Diligent owners investigate the root cause of the failure to try and determine if the problem arose because of operational conditions or a mistake during manufacture. Apparently, a poorly executed procurement process can also easily contribute to problems observed later in service. Selecting a manufacturer with insufficient experience in the required design or failing to carry out design reviews or sometimes lack of in-process control can lead to a poorly designed or manufactured transformer which will be prone to fail prematurely. Our experience adopting best practice and due diligence using such resource as CIGRE brochures has helped our customers through this process.

Transformers operators usually expect long operational life for new units they purchase for their networks. Unfortunately, they can be sometimes badly disappointed when these transformers fail after just few years in service. Diligent owners investigate the root cause of the failure to try and determine if the problem arose because of operational conditions or a mistake during manufacture.
Apparently, a poorly executed procurement process can also easily contribute to problems observed later in service. Selecting a manufacturer with insufficient experience in the required design or failing to carry out design reviews or sometimes lack of in-process control can lead to a poorly designed or manufactured transformer which will be prone to fail prematurely. Our experience adopting best practice and due diligence using such resource as CIGRE brochures has helped our customers through this process.

#Sustainability #Asset # Risk #Solutions

Rafal_Zaleski
Rafal Zaleski

Principal Engineer at Doble Engineering Company (Poland)

10:50 - 11:00 am

Agnelli Room

Q & A Session

11:00 - 11:30 am

Torino Room

Coffee & networking with exhibitors

11:30 – 11:50 pm

Piemonte room

Sponsored
On-Load Tap Changer Diagnosis Using Vibro-Acoustic Fingerprinting

#Asset # Risk #Solutions

omicron
Thomas Renaudin

Regional Application Specialist - Omicron

11:30 – 11:50 pm

Piemonte room

Sponsored
Safety as a driver from plant design to oil and transformer treatment implementation

#Sustainability #Asset #Risk #Solutions

manuel_dal_bello
Manuel Dal Bello

Technical sales manager - Sea Marconi (AR)

12:10 - 12:50 am

Agnelli room

MasterClass

The lack of dedicated industry standards and guidelines, as well as the complexity of temperature-driven dynamics and uneven moisture distribution, make the interpretation and management of moisture in the transformer’s oil/paper insulation system a challenging task. Furthermore, the change of water solubility due to oil degradation prevents an accurate assessment of absolute water content in oil, which is used to evaluate the insulating liquid quality and overall moisture state of a transformer. This paper attempts to outline a practical approach to online continuous moisture measurement and interpretation by introducing a dual probe moisture monitoring solution.

The lack of dedicated industry standards and guidelines, as well as the complexity of temperature-driven dynamics and uneven moisture distribution, make the interpretation and management of moisture in the transformer’s oil/paper insulation system a challenging task. Furthermore, the change of water solubility due to oil degradation prevents an accurate assessment of absolute water content in oil, which is used to evaluate the insulating liquid quality and overall moisture state of a transformer. This paper attempts to outline a practical approach to online continuous moisture measurement and interpretation by introducing a dual probe moisture monitoring solution.

#Asset # Risk

oleg-photo-2dymp
Dr Oleg Roizman

Managing Director - IntellPower (Australia)

12:10 – 12:30 pm

Piemonte room

Sponsored
12:30 – 12:50 pm

Piemonte room

Sponsored
Products and Services of the DASOTEC World

#Asset # Risk #Solutions

anonymous_speaker
David Somvi

President of DASOTEC (Italy)

12:50 - 14:20 am

Torino Room

Lunch

14:20 - 14-40 pm

Agnelli Room

Trivial Transfo Quiz
Keep your phone handy and answer our questions

14:40 – 15:00 pm

Agnelli room

Case Study

Silver sulfide corrosion is a newly discovered cause of failure in transformer onload tap changers (OLTC). When corrosive sulfur in transformer oil reacts with the silver-coated components of the OLTC tap selector, it creates silver sulfide films. During OLTC operation, these silver sulfide flakes can detach from the tap selector and mix with the transformer oil. Since silver sulfide is a semi-conductive material, it reduces the dielectric strength in the transformer oil around the OLTC’s silver-coated contacts and wherever these particles travel in the transformer. Eventually, this can lead to oil breakdown and catastrophic failure of the OLTC, often affecting the tapping winding as well. To ensure transformer reliability, utilities are interested in detecting and mitigating silver sulfide corrosion on OLTCs. This speech discusses the formation of silver sulfide corrosion, mitigation strategies, and a risk assessment criterion using existing diagnostic techniques to determine the extent of silver sulfide corrosion in transformers.

Silver sulfide corrosion is a newly discovered cause of failure in transformer onload tap changers (OLTC). When corrosive sulfur in transformer oil reacts with the silver-coated components of the OLTC tap selector, it creates silver sulfide films. During OLTC operation, these silver sulfide flakes can detach from the tap selector and mix with the transformer oil. Since silver sulfide is a semi-conductive material, it reduces the dielectric strength in the transformer oil around the OLTC’s silver-coated contacts and wherever these particles travel in the transformer. Eventually, this can lead to oil breakdown and catastrophic failure of the OLTC, often affecting the tapping winding as well. To ensure transformer reliability, utilities are interested in detecting and mitigating silver sulfide corrosion on OLTCs. This speech discusses the formation of silver sulfide corrosion, mitigation strategies, and a risk assessment criterion using existing diagnostic techniques to determine the extent of silver sulfide corrosion in transformers.

#Asset # Risk #Solutions

Samarasinghe
Dr. Sameera Samarasinghe

Asset Strategy Engineer - Energy Queensland (Australia)

15:00 – 15:20 pm

Agnelli room

Case Study

This paper will briefly introduce DVtest (DRM – Dynamic Resistance Measurement) method for testing on-load tap changers (OLTCs) and will provide valuable information about different faults in tap changers that can be determined using this non-intrusive test method. Special attention will be given to the detection of bad contacts inside OLTCs, created either by layers of insulation such as silver sulfide deposits, or by weak mechanical connections between tap changer contacts. Two case studies of OLTCs with bad contacts will be presented in the paper

This paper will briefly introduce DVtest (DRM – Dynamic Resistance Measurement) method for testing on-load tap changers (OLTCs) and will provide valuable information about different faults in tap changers that can be determined using this non-intrusive test method. Special attention will be given to the detection of bad contacts inside OLTCs, created either by layers of insulation such as silver sulfide deposits, or by weak mechanical connections between tap changer contacts. Two case studies of OLTCs with bad contacts will be presented in the paper

#Asset # Risk #Solutions

vojko-mrdic-i6w34
Vojko Mrdic

Application engineer - DV Power (Sweden)

15:20 – 15:40 pm

Agnelli room - REMOTELY CONNECTED

Case Study

The text outlines a maintenance strategy to prevent the loss of large transformers caused by corrosive sulfur. The strategy was developed based on international standards and tailored to the local context. The article describes the decision tree for the choice of the most effective long-term mitigation technique, which turned out to be selective depolarization. This technique has been proven to remove DBDS and oil corrosive compounds and restore all chemical and physical properties of the oil, even after a year.

The text outlines a maintenance strategy to prevent the loss of large transformers caused by corrosive sulfur. The strategy was developed based on international standards and tailored to the local context. The article describes the decision tree for the choice of the most effective long-term mitigation technique, which turned out to be selective depolarization. This technique has been proven to remove DBDS and oil corrosive compounds and restore all chemical and physical properties of the oil, even after a year.

#Sustainability #Asset # Risk #Solutions

omar
Omar Ali Al-Ghamdi

Director of GCC Technical Services - GCC Lab (Saudi Arabia)

15:40 - 16:00 pm

Agnelli Room

Q & A Session

16:00 - 16:30 am

Torino Room

Coffee & networking with exhibitors

16:30 – 17:00 pm

Agnelli room

Case Study
Additives in natural esters: what, when, how, and why

#Risk #Solutions

maina
Riccardo Maina

Laboratory Manager - Sea Marconi (Italy)

17:00 – 17:30 pm

Agnelli room

Case Study

Bubble formation from transformer winding insulation is a failure mechanism which may occur from a rapid temperature rise during an overload scenario. With the integration of carbon neutral renewable energy sources and the electrification of transport and heating, transformers may face unpredictable load patterns with high fluctuations where overloading could become necessary due to economic reasons or simply to ensure continuous energy supply. Overloading could lead to excessive hot-spot temperatures and bubble formation which may trigger discharges or even insulation breakdown of transformers. A well-known constraint for bubble formation, mentioned in IEC and IEEE standards, is a hot-spot temperature of 140 °C with a water content of 2 % in paper insulation, for oil immersed power transformers. This work introduces the state-of-art laboratory experimental investigations of impacting parameters on bubble formation, discusses transformer thermal and ageing behaviours, and looking into the potential failure risks and mitigation measures.

Bubble formation from transformer winding insulation is a failure mechanism which may occur from a rapid temperature rise during an overload scenario. With the integration of carbon neutral renewable energy sources and the electrification of transport and heating, transformers may face unpredictable load patterns with high fluctuations where overloading could become necessary due to economic reasons or simply to ensure continuous energy supply. Overloading could lead to excessive hot-spot temperatures and bubble formation which may trigger discharges or even insulation breakdown of transformers. A well-known constraint for bubble formation, mentioned in IEC and IEEE standards, is a hot-spot temperature of 140 °C with a water content of 2 % in paper insulation, for oil immersed power transformers. This work introduces the state-of-art laboratory experimental investigations of impacting parameters on bubble formation, discusses transformer thermal and ageing behaviours, and looking into the potential failure risks and mitigation measures.

#Asset # Risk

Christian Pößniker
Christian Pößniker

PhD Researcher at the University of Exeter (UK/Germany)

17:30

Agnelli Room

Closing of the day

17:45
Meeting in front of the UI Congress Center and transfer by bus to the Royal Palace of Turin
18:15
Visit of Palazzo Reale by night
19:30
Transfer by bus to the Circolo Experia Restaurant for dinner
20:00
Networking dinner and live music evening
23:00
Transfer by bus to Centro congresso Unione Industriale and to Holiday Inn (only for speakers)

Schedule of October 4

09:00 – 09:20 am

Agnelli room

Case Study

BIOTRAFO project proposes a study to generate knowledge on the temperature in the windings of transformers when using biodegradable liquids, which by their nature are more viscous. This temperature is a critical factor for the useful life of the transformer, due to the aging of dielectric solid materials. The aging of these materials when immersed in these liquids will also be analyzed. Not only the question will be observed from a theoretical perspective, industrial platforms will also be used to test the generated models.

BIOTRAFO project proposes a study to generate knowledge on the temperature in the windings of transformers when using biodegradable liquids, which by their nature are more viscous. This temperature is a critical factor for the useful life of the transformer, due to the aging of dielectric solid materials. The aging of these materials when immersed in these liquids will also be analyzed. Not only the question will be observed from a theoretical perspective, industrial platforms will also be used to test the generated models.

#Sustainability #Asset # Risk #Solutions

foto-ortiz-5325v - Copia
Alfredo Ortiz-Fernández

Professor - University of Cantabria (Spain)

09:20 – 09:40 am

Agnelli room

Case Study
Photovoltaic plants, the role of transformers and related design key points in Renewable Energy

#Sustainability #Asset # Risk

ferrari_big
Fabrizio Ferrari

Senior Consultant, ANIE Energia - Chairman of Transformers Group (Italy)

09:40 – 10:00 am

Agnelli room

Case Study

The power industry is always changing, whether it be the technology of the equipment through to the context of business decisions and asset management. The growth in renewables, particularly remote or offshore sites, has led to a focus on reliability as the costs of intervention are usually punitive; sending out a team to inspect and maintain a windfarm transformer is costly. Consequently, operators look to reduce such activity, whether related to maintenance/inspection of the primary assets, or to manage the ancillary equipment, such as protection devices and condition monitoring.

Condition monitoring is a powerful tool which can provide great value in supporting decisions related to transformer health: can we detect and diagnose any failure modes presently in operation, and if so, how long do we have? Traditional approaches to transformer monitoring have concentrated on dissolved gas analyses (DGA) for the transformer oil and bushings, as the latter are a significant cause of failures across the industry; additional monitoring through partial discharge (PD) is also of great diagnostic value, but interpretation of such data is far more complex.

We will share practical cases from a range of applications and look at lessons learned: including the need for data with appropriate accuracy/precision for the decision to be made, but also the need for reliable monitors on unstaffed sites.

For online dissolved gas analysis, examples include:

  • ‘Detector’ DGA devices indicating a change in status, but only at a ‘low’ level; a contextual analysis led to laboratory samples being taken in a risk managed manner, subsequent electrical testing and internal inspection, which, ultimately, saved the transformer from catastrophic failure
  • Multigas DGA devices which may be applied to a variety of oil types but which require a lab sample for confirmation of findings and diagnoses, including a case in the USA where the transformer failed while confirmatory samples were being taken
  • Multigas DGA devices used to make diagnostic decisions in ‘real time’ without requiring subsequent samples

For online bushing monitoring, examples include:

  • The pros and cons of sum current analyses for detection/diagnostics of bushing issues
  • Demonstration of the need for tracking data from raw measurements through to the derived values, to ensure good diagnostics
  • Relative and true power factor cases where complementary approaches aid in diagnostics and tracking of deterioration over time
  • Unexpected data where a bushing deteriorates but then seems to improve, while at another location four bushings seem to go bad simultaneously
  • The role of partial discharge (PD) as a detector and diagnostic for bushings

In addition some PD cases which demonstrate the need for expert support while interpreting data and supporting decisions.

Condition monitoring can be likened to a chain saw – when well used you get the job done quickly and efficiently; when misused, you may end up hurting yourself and the environment. The cases presented here are real cases, with real consequences, which ‘played out’ in real time. The successful cases are those where an agreed action plan was in place at monitor installation, and where the plan was subsequently followed.

The power industry is always changing, whether it be the technology of the equipment through to the context of business decisions and asset management. The growth in renewables, particularly remote or offshore sites, has led to a focus on reliability as the costs of intervention are usually punitive; sending out a team to inspect and maintain a windfarm transformer is costly. Consequently, operators look to reduce such activity, whether related to maintenance/inspection of the primary assets, or to manage the ancillary equipment, such as protection devices and condition monitoring.

Condition monitoring is a powerful tool which can provide great value in supporting decisions related to transformer health: can we detect and diagnose any failure modes presently in operation, and if so, how long do we have? Traditional approaches to transformer monitoring have concentrated on dissolved gas analyses (DGA) for the transformer oil and bushings, as the latter are a significant cause of failures across the industry; additional monitoring through partial discharge (PD) is also of great diagnostic value, but interpretation of such data is far more complex.

We will share practical cases from a range of applications and look at lessons learned: including the need for data with appropriate accuracy/precision for the decision to be made, but also the need for reliable monitors on unstaffed sites.

For online dissolved gas analysis, examples include:

  • ‘Detector’ DGA devices indicating a change in status, but only at a ‘low’ level; a contextual analysis led to laboratory samples being taken in a risk managed manner, subsequent electrical testing and internal inspection, which, ultimately, saved the transformer from catastrophic failure
  • Multigas DGA devices which may be applied to a variety of oil types but which require a lab sample for confirmation of findings and diagnoses, including a case in the USA where the transformer failed while confirmatory samples were being taken
  • Multigas DGA devices used to make diagnostic decisions in ‘real time’ without requiring subsequent samples

For online bushing monitoring, examples include:

  • The pros and cons of sum current analyses for detection/diagnostics of bushing issues
  • Demonstration of the need for tracking data from raw measurements through to the derived values, to ensure good diagnostics
  • Relative and true power factor cases where complementary approaches aid in diagnostics and tracking of deterioration over time
  • Unexpected data where a bushing deteriorates but then seems to improve, while at another location four bushings seem to go bad simultaneously
  • The role of partial discharge (PD) as a detector and diagnostic for bushings

In addition some PD cases which demonstrate the need for expert support while interpreting data and supporting decisions.

Condition monitoring can be likened to a chain saw – when well used you get the job done quickly and efficiently; when misused, you may end up hurting yourself and the environment. The cases presented here are real cases, with real consequences, which ‘played out’ in real time. The successful cases are those where an agreed action plan was in place at monitor installation, and where the plan was subsequently followed.

#Sustainability #Asset # Risk #Solutions

tonymcgrail-pic-n4zp5
Dr Tony McGrail

Solutions Director at DOBLE Engineering (US)

10:20 – 11:00 am

Agnelli room

MasterClass
The involvement of reactive and insulating materials in predictive diagnostics for transformers

#Risk #Solutions

maina
Riccardo Maina

Laboratory Manager - Sea Marconi (Italy)

11:00 - 11:30 am

Torino Room

Coffee & networking with exhibitors

11:30 – 12:10 am

Agnelli room

MasterClass

The history of transformer testing is probably as old or even older than the history of transformers. From its very first appearance in the industry, researchers, manufacturers, and owners have relied on a robust design to comply with and satisfy the field application safely and reliably. Testing can be divided into two major groups. The first one will look at the electro-magnetic characteristics, also known as performance characteristics of a transformer and the second one will look into the dielectric condition of the insulation materials. Throughout this document, a compendium of best practices for field testing of power and distribution transformers is covered. The author will follow the guidelines provided in the international standards (IEEE, CIGRE) highlighting novel methodologies and best practices that have evolved to improve the transformer’s diagnostics and condition assessment, minimize the risk of failure, extend the life of the transformer and support the continuous, stable and efficient operation of the power grid.

The history of transformer testing is probably as old or even older than the history of transformers. From its very first appearance in the industry, researchers, manufacturers, and owners have relied on a robust design to comply with and satisfy the field application safely and reliably. Testing can be divided into two major groups. The first one will look at the electro-magnetic characteristics, also known as performance characteristics of a transformer and the second one will look into the dielectric condition of the insulation materials. Throughout this document, a compendium of best practices for field testing of power and distribution transformers is covered. The author will follow the guidelines provided in the international standards (IEEE, CIGRE) highlighting novel methodologies and best practices that have evolved to improve the transformer’s diagnostics and condition assessment, minimize the risk of failure, extend the life of the transformer and support the continuous, stable and efficient operation of the power grid.

#Asset # Risk #Solutions

diego_robalino_megger2
Dr Diego Robalino

Global Industry Director - Utilities Transformers - Megger Group (USA)

12:10 – 12:40 pm

Agnelli room

Case Study

The use of natural esters is becoming increasingly popular for reasons of transformer life extension, biodegradability, and fire risk. The significantly reduced carbon footprint of ester fluids versus mineral oil is another highly appreciated attribute in terms of sustainability. Many transformers in service, originally designed for mineral oil, could be converted to natural (vegetable) or synthetic ester. Unfortunately, current international standards give only generic information about the refilling practice.

This report shows the results of test experience finalized to identify the best technique for assessing the residual oil quantity after the replacement of mineral oil with natural ester (so called memory effect), and then describes the refilling practice applied on breathing distribution transformers, designed to minimise the memory effect and ensure the reliability of the transformer and the insulating liquid.

The use of natural esters is becoming increasingly popular for reasons of transformer life extension, biodegradability, and fire risk. The significantly reduced carbon footprint of ester fluids versus mineral oil is another highly appreciated attribute in terms of sustainability. Many transformers in service, originally designed for mineral oil, could be converted to natural (vegetable) or synthetic ester. Unfortunately, current international standards give only generic information about the refilling practice.

This report shows the results of test experience finalized to identify the best technique for assessing the residual oil quantity after the replacement of mineral oil with natural ester (so called memory effect), and then describes the refilling practice applied on breathing distribution transformers, designed to minimise the memory effect and ensure the reliability of the transformer and the insulating liquid.

#Sustainability #Asset #Risk #Solutions

actis2
Riccardo Actis

Chief Operation Manager - Sea Marconi (Italy)

12:40 – 13:10 am

Agnelli room

Case Study

The use of natural esters coupled with solid insulating materials of higher performance (like aramid Nomex® insulation) provides the best solution for more flexible and resilient transformers. Many renewable energy production plants require transformers that use biodegradable and sustainable liquids. They are also becoming more and more popular solution in urban substations due to the safety of these liquids in case of fire, as compared to traditional mineral oils. The use of natural esters has grown exponentially even if initially it was limited to small distribution and industrial transformers only. The continuous improvements in formulations of new esters and careful evaluations of new liquids in new transformer applications results in a wider acceptance of ester liquids in power transformers. After successful pilot projects, the transmission companies or other users of large power transformers consider project specifications with broader use of natural ester liquids. This publication provides selected physio-chemical characteristics of a new natural ester liquid Paryol Electra 7426 available for power transformers. This type of data is important for transformer designers and users, especially when ester liquids find application in larger and larger power transformers and with higher and higher rated voltages. Providing properly developed material characterization is then critical for reliable long-term performance of these transformers. An important part of insulation material characterization is its thermal performance in various insulation systems combining different solid materials and liquids. It supports developing adequate design rules for transformers using those specific combination of materials as indicated in IEC 60076-14. This publication presents an example of thorough evaluation of insulation system thermal properties following the established and standardized test method as per IEEE Std. C57.100. Additionally, the results will be validated and certified by a 3rd party certification company to ensure the highest quality of the generated test data. The obtained temperature index for the evaluated insulation system with natural ester shows improvement of the thermal performance of the aramid enhanced thermally upgraded paper as compared to the historical aging test data of this same paper in mineral oil. This confirms the assumptions for ester liquids improving the performance of cellulose based insulating papers in liquid-immersed systems. However, this improvement may be different for diverse types of papers and liquids. In order to better understand the performance of other insulation systems, more thermal evaluations are planned for alternative systems with different solid materials and liquids combinations.

The use of natural esters coupled with solid insulating materials of higher performance (like aramid Nomex® insulation) provides the best solution for more flexible and resilient transformers. Many renewable energy production plants require transformers that use biodegradable and sustainable liquids. They are also becoming more and more popular solution in urban substations due to the safety of these liquids in case of fire, as compared to traditional mineral oils. The use of natural esters has grown exponentially even if initially it was limited to small distribution and industrial transformers only. The continuous improvements in formulations of new esters and careful evaluations of new liquids in new transformer applications results in a wider acceptance of ester liquids in power transformers. After successful pilot projects, the transmission companies or other users of large power transformers consider project specifications with broader use of natural ester liquids. This publication provides selected physio-chemical characteristics of a new natural ester liquid Paryol Electra 7426 available for power transformers. This type of data is important for transformer designers and users, especially when ester liquids find application in larger and larger power transformers and with higher and higher rated voltages. Providing properly developed material characterization is then critical for reliable long-term performance of these transformers. An important part of insulation material characterization is its thermal performance in various insulation systems combining different solid materials and liquids. It supports developing adequate design rules for transformers using those specific combination of materials as indicated in IEC 60076-14. This publication presents an example of thorough evaluation of insulation system thermal properties following the established and standardized test method as per IEEE Std. C57.100. Additionally, the results will be validated and certified by a 3rd party certification company to ensure the highest quality of the generated test data. The obtained temperature index for the evaluated insulation system with natural ester shows improvement of the thermal performance of the aramid enhanced thermally upgraded paper as compared to the historical aging test data of this same paper in mineral oil. This confirms the assumptions for ester liquids improving the performance of cellulose based insulating papers in liquid-immersed systems. However, this improvement may be different for diverse types of papers and liquids. In order to better understand the performance of other insulation systems, more thermal evaluations are planned for alternative systems with different solid materials and liquids combinations.

#Sustainability #Asset # Risk #Solutions

scatiggio
Fabio Scatiggio

Senior Technical Advisor - A&A Fratelli Parodi (Italy)

13:10 - 14:40 am

Torino Room

Lunch

14:40 – 15:20 pm

Agnelli room

ROUND TABLE

#Asset # Risk #Solutions

profile-photo-james-reid-pkv8r
James Reid

Technical Manager - M&I Materials (UK)

Fernandez
Roberto Fernández

Application Engineering Leader - Cargill (Spain)

Bruce-Pahlavanpour-interview
Dr Bruce Pahlavanpour

Senior consultant - Ergon International (UK)

scatiggio
Fabio Scatiggio

Senior Technical Advisor - A&A Fratelli Parodi (Italy)

15:20 – 15:40 pm

Agnelli room

Case Study

Performing oil sampling on Oil Impregnated Paper (OIP) and many Resin Bonded Paper (RBP) high voltage capacitive bushings, as utility we got significant amount of data over decades. Using mostly centiles on different Dissolved Gas Analysis (DGA) and classifying it, it enables us to set useful criteria for bushing fleet assessment conditional maintenance or immediate removal decision. A few examples of those centiles will be presented and compared to the few standards existing on this specific topic.

Performing oil sampling on Oil Impregnated Paper (OIP) and many Resin Bonded Paper (RBP) high voltage capacitive bushings, as utility we got significant amount of data over decades. Using mostly centiles on different Dissolved Gas Analysis (DGA) and classifying it, it enables us to set useful criteria for bushing fleet assessment conditional maintenance or immediate removal decision. A few examples of those centiles will be presented and compared to the few standards existing on this specific topic.

#Asset #Solutions

sanchez
Jean Sanchez

Transformer Engineer - EDF (France)

15:40 – 16:10 pm

Agnelli room

Case Study
Challenging Aspects in Technologies and Design of High Voltage Transformer Bushings

#Sustainability #Asset # Risk

armando-pastore-kmd70_2
Armando Pastore

Bushings Product & Technology Leader - GE Renewable Energy (Italy)

16:30 – 16:50 pm

Agnelli room

Case Study

100 MVA transformer upgrading for noise reduction and better performance – calculation – studies – noise reduction – new cooling upgrading – new indoor installation – point of view on oil treatment – conclusions

100 MVA transformer upgrading for noise reduction and better performance – calculation – studies – noise reduction – new cooling upgrading – new indoor installation – point of view on oil treatment – conclusions

#Asset # Risk #Solutions

donnadieu
Michel Donnadieu Bellon

Business Development - JST Maintenance (France)

16:50 - 17:10 am

Agnelli Room

Q & A Session

17:10 – 17:30 pm

Agnelli room

Sponsored
A Group vision of natural synergies

#Sustainability #Asset # Risk #Solutions

Pedriali_Riccardo
Riccardo Pedriali

Sustainability manager - A&A F.lli Parodi

17:30 - 17:45 am

Agnelli Room

Closing of the Meeting

Schedule of October 5, 2023

09:30 - 14:00
Visit to Sea Marconi Company Headquarter

Visit to the headquarters of the Sea Marconi (via Ungheria 20, Collegno – Turin)

Please note that transportation to the Sea Marconi venue is the responsibility of each participant

Venue Map

Click below to view the available spaces at the chosen venue for My Transfo 2023

Click here

Interventions divided by types

Choose at any time which intervention to attend (Piemonte room/Agnelli room) based on the title or type of the intervention

Simultaneous translation

My Transfo is the only industry event with simultaneous translation in 3 languages. The official language of the event is English, but each speech in the AGNELLI room will be simultaneously translated into Italian, French

This post is also available in: Italian French Spanish