Monthly Archives: February 2021

Resiliency of the Grid image - blog post

Resiliency of the Grid, a collaborative webinar between CIGRE UK NGN and CIGRE Italy NGN

By | Blog, NGN Events | No Comments

Resiliency of the Grid

a collaborative webinar between CIGRE UK NGN and CIGRE Italy NGN


Date & time: Friday 19th March, 2021 | 4:30pm to 5.30pm GMT, 5:30pm to 6:30 pm CET

Description: Recent blackouts in Texas brought the Grid Resilience into the front line again. Are you interested in quantifying Grid Resilience? Are you interested in understanding how Grid Resilience is tackled in different countries? Please join us in our next online technical webinar, organised in collaboration between CIGRE UK NGN and CIGRE Italy NGN.



  • 5min: Introduction to Italy NGN
  • 5min: Introduction to UK NGN
  • 20min: Dr. Luigi Calcara (University of Roma “La Sapienza”- Italy) ‘Heatwaves effects on MV electrical grid’
  • 20min: Dr. Eduardo Alejandro Martínez Ceseña (University of Manchester – UK) ‘Techno-economic modeling and assessment of forward resilience measures’
  • 10min: Round table discussion



Heatwaves effects on MV electrical grid – In the last years, the frequency and the intensity of adverse meteorological conditions are on the rise and climate changes have the potential to affect negatively the electrical systems in many different ways. Local or extended electrical outages have been and are caused by extremely severe negative meteorological events of different nature, like strong winds, wet snow, heavy rain, and heatwaves. Of course, such interruptions of electrical systems affect also critical infrastructures with a negative impact on all human and industrial activities. To face this reality, the Italian Regulatory Authority for Energy, Networks and the Environment (ARERA), established new more stringent rules to maintain high standards of power quality services also through a more resilient electrical system. For this reason, there have been established very ambitious benchmark values for the key performance indicators, normally used to evaluate the quality of electric service. With the aim to increase the resilience of the distribution electrical networks, the DSOs are studying and developing new grid operations with improved assets adopting also advanced electrical technologies. In particular, the medium voltage joints are currently one of the components which require more attention: in fact, they make the system more vulnerable due to possible imperfections introduced during the construction phase both for unperfect manpower and for the complexity of the operations.

Techno-economic modeling and assessment of forward resilience measures – The importance of developing resilience energy systems is attracting research interest due to the recent climate change-driven extreme weather events experienced in different parts of the world. For example, in the UK, Ofgem (the network regulator) has highlighted the importance of considering resilience when developing the power system. However, as resilience is still an emerging topic, there are no standardised metrics and methodologies to quantify resilience and include it in operation and planning practices. This presentation provides an overview of the latest research from The University of Manchester which aims to address these research gaps. To be more specific, the key differences between classical reliability and resilience studies will be presented. The adequacy of different metrics and approaches used to quantify resilience will also be discussed. Proposed approaches to simulate the impacts of extreme events such as wind storms and floods will then be explored in the context of smart systems in urban areas and off-grid systems in isolated locations. The effectiveness of different resilience measures, such as asset hardening and the use of system flexibility, will be discussed in different contexts.


Dr. Luigi CalcaraLuigi Calcara – Luigi Calcara (1990) received (2015) the Master Degree in Electrical Engineering from the University of Roma “La Sapienza”. Part of his thesis was supported by Enel Distribuzione with a training stage developing the work titled “Advanced systems for temperature monitoring to reduce the rate of failures of electric distribution lines in underground medium voltage cables”. This contribution was honoured (2016) by the CEI Award as one of the Best Italian Master Degree Thesis.  In 2020 he received his PhD degree, with the valuation with honours, at the University of Roma “La Sapienza” developing a work thesis on the subject of Electrical Resilience: Technological Aspects.  From 2020 he is Contract Professor of “Electric Components” for Electrical Engineering Master Degree at the University of Roma “La Sapienza”. From 2021 he is Assistant Professor at the same University. He was the Technical Program Chair of the IEEE International Conference on Dielectric Liquids 2019 (IEEE DEI Society). From 2018 he is member of the local organizing committee of the annual IEEE International Conference on Environment and Electrical Engineering. In 2017 he was Co-Guest Editor of the ELSEVIER Electric Power System Research Journal for the Special Issue on Advances in HV Systems. He also served and is still serving the IEEE DEI Society as Co-Guest Editor of two subsequent Special Issues (2018 and 2020) on Liquid Dielectrics of the Transactions on Dielectrics and Electrical Insulations. From 2016 he is member of CEI CT10 and IEC TC 10 “Fluids for electrotechnical applications”.  Up to 2020 he was chair of the IEEE Sapienza Student Branch. Currently, he is President of the Roma Youth Section of the Electrical Italian Association (AEIT).  He is CIGRE D1 Italian Representative Secretary (Materials and Emerging Test Techniques) and member of the CIGRE D1.68 “Natural and synthetic esters – Evaluation of the performance under fire and the impact on environment.


Dr Eduardo Alejandro Martínez Ceseña is an academic fellow in multi-energy systems at The University of Manchester. His research interests include business case assessment, decision making under uncertainty, and modelling of resilient integrated electricity/heat/gas systems. He has co-authored over 50 research papers in high-ranking journals and international conferences, and has participated in over a dozen UK and international research projects; currently leading a 10 researchers team and holding ~£1.5M in active research projects. He is also is a member of CIGRE C6/C1.33, Multi-Energy Systems, and the secretary of CIGRE C6/C2.34, Flexibility provision from distributed energy resources.



cover slide

CIGRE UK NGN Young Members Showcase – The Winners

By | Blog, NGN Events | No Comments

The NGN Committee of CIGRE UK hosted an online presentation competition on 5th February 2021 to select the best UK young professionals to present at the upcoming CIGRE Centennial Paris Session in August 2021. The Paris Session includes a Young Member (YM) showcase for young professionals to present their contributions to CIGRE’s domains of work before an audience of leading experts from all around the world.

The NGN steering committee assessed abstracts and invited seven candidates to present their work at the presentation competition. Each presentation was judged by a panel of four senior CIGRE UK members, including Dr. Diptargha Chakravorty, Dr. Qiteng Hong, John Wright, and Dr. Konstantinos Kopsidas. Winners of the competition were nominated to attend the 2021 Centennial Paris Session and receive free tickets and a bursary towards travel if approved by the international CIGRE NGN committee.

The CIGRE UK NGN committee is delighted to announce the four winning candidates are:


Harry Evans1

Harry Evans, graduate electrical engineer at GHD, for their presentation entitled “Boston Spa Energy Efficiency Trial.”

Bio: Harry is a consultant electrical engineer working within GHD’s Energy team. During his time at the company, he has worked on a range of projects covering: SMART grid design of distribution networks; power systems modelling of generation connections; and he has co-authored a review into emerging transmission technologies. Harry has gained experience outside of his role at GHD in the development of fault level calculation code for application in offshore wind farm design software, and a continuing role as a contributing member to CIGRE WG B4.89.

Synopsis:What if a relatively small change at a substation level could reduce the regions carbon emissions and shrink customer bills? NPGs voltage optimisation trial in the town of Boston Spa is hoping to achieve just that. This presentation covers the initial stages of the project, which investigated static optimisation of substation voltages, and how customer smart meter data can be used to monitor and control the network more efficiently.


Rui Jing1Dr. Rui Jing, research associate at Cardiff University, for their presentation entitled “Planning extreme weather resilient urban energy systems.”

Bio:Dr. Rui Jing is a Research Associate in Cardiff University working with Prof. Nick Jenkins and Prof. Jianzhong Wu. His research focuses on multi-energy system modelling, urban energy transition, climate resilience energy systems, and energy-related nexus research. He got a Ph.D. from Xiamen University, China in 2019. He also has visiting experience in Imperial College London (2018-2019), research experience in the Chinese Academy of Science (2019-2020), and industry experience in energy auditing consultancy (2013-2015). So far, he has more than 20 journal publications, and the H-index is 11. He is also active in academic activities, e.g. acting as session chair for international conferences and serving as reviewers for more than 10 journals. He was recognized for several best paper awards and several outstanding reviewer awards.

Synopsis:Global climate change leads to more frequent and intense extreme weather events, such as typhoons, heatwaves, and rainstorms, which has posed serious risks for urban energy systems. Without preparation for such risks, the city administrators can only hope the next extreme weather event would not trigger a sudden blackout. Therefore, we propose an original planning model to design a ‘climate-resilient’ urban energy system and bridge the gap of addressing extreme weathers during energy system planning. The case study reveals that by investing an acceptable extra 3-5% could help design  a  ‘climate-resilient’ urban energy system.


Caleb Waler1Caleb Walker, graduate engineer at Scottish Power, for their presentation entitled “Accurate Prediction of Transformer Residual Life.”

Bio: Having graduated from Glasgow Caledonian University with a First BEng in Electrical Power Engineering in 2020, I am currently employed as a graduate engineer with SP Energy Networks.

Synopsis: The ageing process of power transformers is a complex mechanism, which means condition and health assessment of these critical assets is a challenging task. While transformers are in-service, obtaining insulating paper samples from the windings for direct analysis cannot easily be achieved, meaning the only practical way of assessing the state of degradation of the paper insulation is through prediction models. A new prediction method is currently being developed using Post-Mortem reports to give a more accurate estimate of the remaining useful life of transformers compared to existing methods, thus avoiding costly interventions or replacement of these high value assets.


Shuren WangDr. Shuren Wang, research associate at the University of Strathclyde, for their presentation entitled “A T-Type Modular Multilevel Converter (T-MMC) to Improve System Security.”

Bio: Shuren Wang is a researcher of the Electronic & Electrical Engineering Department at University of Strathclyde. He received the B.Sc. (Hons.) and M.Sc. (Distinguished) degrees from Yangzhou University, China, and the Ph.D. degree from University of Strathclyde, U.K.. His current research interests include power conversion, power electronics, MVDC, HVDC, and energy storage systems.

Synopsis: Power electronic converters are enabling massive integration of renewable energy sources. Meanwhile, system security and fault resiliency are increasingly concerned. A T-Type Modular Multilevel Converter (T-MMC) using state-of-the-art power electronic technology will be presented for bulk ac-dc power conversion applications. The salient features of the proposed T-MMC include: (1) resiliency against ac and dc faults; (2) effective ac grid support; (3) high operation efficiency; (4) flexible and efficient energy storage integration; (5) uninterruptable power flow during faults with the integrated energy storage.


Keep an eye out as we are due to hear back about the success of the nominated candidates in the coming months.