Program

SUNDAY | OCTOBER 20TH

INDUSTRY KEYNOTE 1

Sunday | October 20th, 2024

Gold Sponsor – OKK Technological Solutions | 16h30 – 17h15

Venue: Auditorium Willson Aita

INDUSTRY KEYNOTE 2

Sunday | October 20th, 2024

Gold Sponsor – Typhoon HIL, Inc. | 17h15 – 18h

Venue: Auditorium Willson Aita

PLENARY SESSION 1

Sunday | October 20th, 2024 | 18h30 – 20h

Venue: Auditorium Willson Aita

Title: Power Electronics and Power Quality

Speaker: Prof. Dr. José Antenor Pomilio

Institution: University of Campinas (UNICAMP), Brazil

A critical and historical (re)view of power quality standards and their relationship and adequacy (or obsolescence) with the growing presence of electronic power solutions in electricity networks. Analysis of standards for distribution and onboard networks (avionics).

MONDAY | OCTOBER 21ST

PLENARY SESSION 2

Monday | October 21st, 2024 | 10h30 – 12h

Venue: Auditorium Willson Aita

Title: Reliability and Condition Assessment of Power Transformers

Speaker: Prof. Dr. Stefan Tenbohlen

Institution: University of Stuttgart, Germany.

Accurate information about the service experience of high voltage equipment is of significant value to both the electric utilities and to manufacturers of such equipment. It helps the manufacturers improve their products, and provides important inputs for the utilities when organizing maintenance and benchmarking their performance. Statistical analysis of the past failure data can display useful features with respect to the future failure behavior. Equipment reliability data are also required when assessing the overall reliability of an electric power system, including studies of the electric energy supply security. This presentation addresses the analysis of transformer failures collected by Cigre WG A2.62. Based on a transformer population with more than 425,000 unit-years and 1,159 major a failure rate of app. 0.3 % p.a. was determined. Failure location and mode analysis is presented for different voltage classes, along with external effects. Winding related failures appear to be the largest contributor of major failures. Bushing failures most often lead to severe consequences like explosion or fire. The collected age distributions enable the determination of the hazard rate, making this study unique due to its international scope. Information on retirements is valuable because it indicates units that are nearing failure but have not yet failed. The deployment of new inspection and condition assessment strategies further increase the reliability of power transformers. By leveraging tools such as UHF PD measurement and FRA, manufacturers can proactively identify potential issues and ensure compliance with acceptance criteria. Digital innovation, such as online monitoring and remote diagnostics, offer insights into transformer performance, strengthening predictive maintenance strategies and minimizing downtime. However, these technologies must be carefully integrated and configured to maximize their effectiveness and security. Looking ahead, the power sector must embrace digital transformation across the entire lifecycle of transformers, from design and manufacturing to operation and maintenance. By leveraging cutting-edge technologies and best practices, stakeholders can ensure the resilience and reliability of power infrastructure in the face of evolving operational challenges and dynamic grid environments.

INDUSTRY KEYNOTE 3

Monday | October 21st, 2024

Diamond Sponsor – WEG | 15h30 – 16h30

Venue: Auditorium Willson Aita

INDUSTRY KEYNOTE 4

Monday | October 21st, 2024

Silver Sponsor – Egston | 16h30 – 17h

Venue: Auditorium Willson Aita

PLENARY SESSION 3

Monday | October 21st, 2024 | 17h – 18h30

Venue: Auditorium Willson Aita

Title: Risks and challenges to develop high efficiency systems for legacy industries

Speaker: Prof. Dr. Helder Tavares Câmara

Company: Maersk Container Industry – Denmark

It is not new that the government and industries have been giving importance to optimizing the way we produce and consume energy. Much of this focus has been on the conversion of electrical energy into mechanical energy. One reason is the fact that 53% of all electrical energy is consumed by electric motors, according to the International Energy Agency of the United Nations. Considering that the adoption of electric mobility is on the rise, this percentage is likely to increase in the coming decades. However, to meet this energy demand, approximately 6,800 Mt of carbon dioxide (CO2) is emitted, equivalent to the emissions of 2,200 thermal power plants. Therefore, the use of more efficient electric motors could mean a reduction of 6 billion annually in environmental costs, considering only Europe. For the European industry, this optimization currently means saving 10 billion euros annually. As a result, various projects and products have been offered in the market to reformulate and update industrial processes to make them more energy-efficient. Despite the economic factor being quite attractive, transforming existing products and processes can be a very challenging task for the professionals involved. Within some organizations, such projects conflict with certain departments due to the availability of resources, a good understanding of costs, and impacts on the resulting product’s life cycle. A good example is the fact that the energy savings brought by frequency converters carry with them an increase in sensitivity to voltage sags and the introduction of harmonics, raising costs in system risks as a whole. Coupled with this are warranty contracts that are resilient to changes, especially with very new technologies. Can a system using a permanent magnet motor have the same longevity warranty as an induction motor? Thus, many new technologies or solutions that seem very economically attractive in isolation always bring with them challenges and impacts when integrated into large systems, mitigating their benefits. In this lecture, I will present some examples of what I have experienced and learned over 15 years as a professional dealing with the updating of processes/products for greater energy efficiency. In the cases presented here, I hope to be able to explain how important it is to understand that any change in a product requires a holistic view. Sometimes, decisive technical and economic factors are initially invisible in layers of complexity of a process or product production. Identifying them at the earliest possible stage can be the essential element for a successful project.

TUESDAY | OCTOBER 22ND

PLENARY SESSION 4

Tuesday | October 22nd, 2024 | 10h30 – 12h

Venue: Auditorium Willson Aita

Title: Model Predictive Control in Microgrids Considering Demand Management, Hybrid Energy Storage and User Satisfaction

Speaker: Prof. Dr. Júlio Elias Normey-Rico

Institution: Federal University of Santa Catarina (UFSC), Brazil

Model Predictive Control in Microgrids Considering Demand Management, Hybrid Energy Storage and User Satisfaction This lecture presents a Model Predictive Control (MPC) strategy to act as a Energy Management System for Microgrids Considering Demand Management, Hybrid Energy Storage and User Satisfaction. The proposed MPC is responsible for supervising the operation of the microgrid, where it accounts for both economic performance and demand management (DM) actions taking into account user comfort, and adopting a quality of experience (QoE) metric. A smart house is used in the study to analyse the performance of the proposed controller. The energy storage in this smart house is done using batteries and renewable hydrogen, which results in a reduction of pollutant emissions. The Model Predictive Control formulation uses a mixed-integer quadratic programming (MIQP) optimization, which avoids the use of nonlinear optimization tools. Validated by simulation, the system achieves the required standards: runs the smart house for a year with a 21% electricity bill reduction and 77% reduction in user discomfort. Curriculum Julio Elias Normey-Rico received his Ph.D. degree from University of Seville, Spain, in 1999. He is currently a Full Professor of the Dept. of Automation and Systems Engineering in Federal University of Santa Catarina (UFSC), in Brazil and head researcher of Renewable Energies Research Team (GPER/UFSC), lead research group in this topic in Latin America. He is the director of several research partnerships with energy industries and international cooperation agreements (Argentina, Uruguay, Spain, Chile and Italy). He is the author of over 260 conference and journal papers, and published four book chapters and the books Control of Dead-Time Processes (Springer), Introdução ao Controle de Processos (Blucher) and Controle Preditivo Baseado em Modelo (Blucher). He has supervised over 60 PhD/MSc. candidates. He was the Associate Editor of Control Engineering Practice from 2007 to 2018 and Editor of the International Renewable Energy Congress since 2014. Since 2000 he integrates the NOC of several national conferences related with automatic control, and recently, he was the General Chair of the IFAC Symposium DYCOPS 2019. He is the coordinator of the National Institute of Science and Technology in Control and Automation of Energy Processes.

INDUSTRY KEYNOTE 5

Tuesday | October 22nd, 2024

Diamond Sponsor – RAISA | 15h30 – 16h30

Venue: Auditorium Willson Aita

INDUSTRY KEYNOTE 6

Tuesday | October 22nd, 2024

Silver Sponsor – Imperix | 16h30 – 17h

Venue: Auditorium Willson Aita

PLENARY SESSION 5

Tuesday | October 22nd, 2024 | 17h – 18h30

Venue: Auditorium Willson Aita

Title: Modeling and Nonlinear Stability Analysis for Sustainable Electrical Microgrids

Speaker: Prof. Dr. Daniel Pagano

Institution: Federal University of Santa Catarina (UFSC), Brazil

Nowadays, one of the trends within power electronics is the application of power converters in microgrids, which in essence means power electronics applied to electric power distribution systems. As microgrids can be DC, AC, or even hybrid networks, they are complex and multi-scale systems with many source-source and source-load-type nonlinear dynamic interactions. Although dynamic interactions between power electronic devices have been studied using small-signal stability analysis, large-signal stability analysis remains to be explored. Furthermore, the coexistence of different time-scale power electronic components can generate new instabilities mechanisms in sustainable microgrid systems. Load sharing is one of the major issues within microgrids, and it is defined as how several voltage sources operate in parallel feeding a given load set. Droop control is the standard approach towards the load sharing problem in microgrids, but this control can make the system unstable due to some nonlinearities introduced into the microgrid’s operation. For this reason, nonlinear dynamic analysis techniques are applied to understand the microgrid’s dynamic behavior. Bifurcation theory offers a broader insight into the system dynamics when compared to usual techniques based on linear models. Moreover, bifurcation theory can optimize the microgrid operation and, thus, increase the system stability range due to a better understanding on how a group of parameters can influence the microgrid operation. A significant part of this talk consists of theoretical studies produced over the last few years on this subject. Furthermore, a case study is carried out involving the parallelism of two DC-AC power converters, where experimental results are presented to validate the theoretical assumptions.

WEDNESDAY | OCTOBER 23RD

PLENARY SESSION 6

Wednesday | October 23rd, 2024 | 10h30 – 12h

Venue: Auditorium Willson Aita

Title: Power Electronics for Energy-Efficient Buildings and Districts

Speaker: Dr. Edivan Laercio Carvalho

Institution: Tallin University of Technology (TalTech), Estonia

Intensive research in energy efficiency, energy-saving technologies, and sustainable use of renewable energy is needed to enable emerging net-zero energy buildings. These technologies make buildings capable of demand-response, providing the flexibility needed to increase power grid stability. The unfolding paradigm shift to power-electronics-enabled DC residential microgrids will push further the energy performance limits of buildings by reducing residential electricity consumption by up to 30% compared to those with AC distribution. The DC microgrids feature an increased power delivery capacity, perfectly addressing many issues of last-mile electrification. Hence, the application of DC microgrid technology can significantly improve the resilience and demand-side flexibility of residential buildings and energy communities, thus making them future-proof and compatible with global energy transition targets.

PLENARY SESSION 7

Wednesday | October 23rd, 2024 | 13h30 – 15h

Venue: Auditorium Willson Aita

Title: Adaptive Control Techniques for Grid-Integrated Power Electronics Converters

Speaker: Prof. Dr. Heverton Augusto Pereira

Institution: Federal University of Viçosa (UFV), Brazil

Nowadays, the power systems are submitted to current and voltage harmonics due to the increased presence of nonlinear loads and the wide use of power inverters to interface solar and wind power plants. Nevertheless, these inverters can also be used to compensate current harmonics and improve the system power quality. Traditional harmonic detection methods extract all harmonic current information and the control tuning tends to be complex and less flexible. Therefore, adaptive current harmonic control strategy can be applied in grid-integrated power electronics converters. Voltage and current detection-based harmonic current compensation (VDB-HCC and CDB-HCC, respectively) strategies will be explored in this presentation. CDB-HCC strategies require converter hardware retrofit by inserting an extra current sensor to measure load or downstream grid currents. On the other hand, VDB-HCC strategies are straightforward solutions employing only embedded measurements used for protection, control, and synchronization purposes.

INDUSTRY KEYNOTE 7

Wednesday | October 23rd, 2024

Silver Sponsor – PHB Solar | 15h30 – 16h30

Venue: Auditorium Willson Aita

PLENARY SESSION 8

Wednesday | October 23rd, 2024 | 16h30 – 18h

Venue: Auditorium Willson Aita

Title: Simultaneous Wireless Power and Data Transfer

Speaker: Prof. Dr. Yijie Wang

Institution: Harbin Institute of Technology, China

The emergence of technologies that facilitate Simultaneous Wireless Power and Data Transfer (SWPDT) has garnered considerable research interest. SWPDT is designed to power and transmit data to mobile devices via a single wireless channel, thereby overcoming the limitations imposed by conventional wired connections. This presentation will explore the principles, significant challenges, and practical applications of SWPDT technology. It will start by detailing the foundational principles of SWPDT, such as the integration of power transfer with data transmission and the modulation techniques used. The presentation will then address the technical hurdles in SWPDT, including the enhancement of data transfer rates and the mitigation of interference. Additionally, the presentation will discuss the extensive application potential of SWPDT.