Publicação
MEASUREMENT OF AC LOSSES IN INDUCTIVE HTS FAULT CURRENT LIMITERS
| Resumo: | Power failures in high risk locations cause serious consequences in our day-to-day life. To ensure that this does not happen, it is essential to use instruments responsible for dealing with short circuits that inevitably occur, and thus, protecting equipment used in electrical energy distribution and transport. Their actions can save a lot of investments in fixings and replacements of many devices affected by short circuits. Super-conducting Current Fault limiters (SFCLs) are commonly used to protect equip- ment in these networks, so it is important to be aware of the possible wear of the SFCL’s so they may not affect the performance of other network equipment. They can be integrated into multiple locations in electrical grids, contributing to the electrification of the energy system, and taking an important role in Energy Transition. Among the several kinds of SFCLs that have been developed, it is the Inductive Transformer-Type SFCL that will be the focus of this dissertation. It is comprised of a three-phase transformer with a short-circuited HTS winding as its secondary. By inducing voltage into these superconducting windings, AC losses are generated. The purpose of this dissertation is to analyze the AC losses that affect the lifespan of Transformer-type SFCLs using a computer program developed in Python. By studying how the HTS windings will perform when integrated into SFCLs based on their characteristics, we can draw conclusions that will help enhance the production and design of HTS windings to reduce AC losses and improve the performance of SFCLs. This objective was accomplished by creating three HTS windings from HTS tapes using methods for superconductor soldering and jointing, as well as developing multiple critical equipment for maintaining good system performance during operation. The SFCL in question is in normal operation (not when a short circuit occurs) and in Single-phase; the losses will be measured based on the instantaneous current and the electromotive force present on the HTS windings. Other experiments were made to test the methods of mea- suring the Solder Joint Resistance of the samples and their AC Losses when incorporated or not into the Inductive Transformer-type SFCL. |
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| Autores principais: | Costa, Simão Afonso Lopes de Noronha Pereira da |
| Assunto: | Transformer-type SFCL AC losses HTS winding Single-phase |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | Power failures in high risk locations cause serious consequences in our day-to-day life. To ensure that this does not happen, it is essential to use instruments responsible for dealing with short circuits that inevitably occur, and thus, protecting equipment used in electrical energy distribution and transport. Their actions can save a lot of investments in fixings and replacements of many devices affected by short circuits. Super-conducting Current Fault limiters (SFCLs) are commonly used to protect equip- ment in these networks, so it is important to be aware of the possible wear of the SFCL’s so they may not affect the performance of other network equipment. They can be integrated into multiple locations in electrical grids, contributing to the electrification of the energy system, and taking an important role in Energy Transition. Among the several kinds of SFCLs that have been developed, it is the Inductive Transformer-Type SFCL that will be the focus of this dissertation. It is comprised of a three-phase transformer with a short-circuited HTS winding as its secondary. By inducing voltage into these superconducting windings, AC losses are generated. The purpose of this dissertation is to analyze the AC losses that affect the lifespan of Transformer-type SFCLs using a computer program developed in Python. By studying how the HTS windings will perform when integrated into SFCLs based on their characteristics, we can draw conclusions that will help enhance the production and design of HTS windings to reduce AC losses and improve the performance of SFCLs. This objective was accomplished by creating three HTS windings from HTS tapes using methods for superconductor soldering and jointing, as well as developing multiple critical equipment for maintaining good system performance during operation. The SFCL in question is in normal operation (not when a short circuit occurs) and in Single-phase; the losses will be measured based on the instantaneous current and the electromotive force present on the HTS windings. Other experiments were made to test the methods of mea- suring the Solder Joint Resistance of the samples and their AC Losses when incorporated or not into the Inductive Transformer-type SFCL. |
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