2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), 2017
Power system protection coordination plays the main role in the continuity of service in electric... more Power system protection coordination plays the main role in the continuity of service in electrical systems. Incorrect settings may allow that repetitive failures occur before triggering an interruption. Consequently, it is necessary to identify the devices that clear a fault to assess its operation. The identification process can be achieved by a signature that each device induces in the voltage and current waveforms. As a proposal, this article presents a new method in the analysis of the transients related to the operation of the protections in the distribution systems for identification of protective devices. This method has the ability to detect transient changes and characterize the quality disturbances of three-phase systems.
2020 IEEE Industry Applications Society Annual Meeting, 2020
This paper proposes the development of a small-scale prototype of a steel manufacturer user. This... more This paper proposes the development of a small-scale prototype of a steel manufacturer user. This work arises from a requirement in the test of new technological processes in steel production, giving a high level of trust to industrial facilities, this requirement is referenced through the assessment of working groups related to steel production. The paper presents an evaluation of the operational conditions of the electric arc furnace, the rolling mill loads, and the communication system. The work aims for the integration of small-scale prototypes that simulate the operation in a steel manufacturer user. This prototype will be used for the test of new control, protection, and operation methodologies of steel manufacturer users.
2017 IEEE Industry Applications Society Annual Meeting, 2017
Recorders provide information related to the “tap to tap” Arc Furnace's operation time. In th... more Recorders provide information related to the “tap to tap” Arc Furnace's operation time. In this article, a heuristic analysis is performed for electric arc furnace operation. At a later stage of the investigation, an optimization of the operation is performed. Each step of the process is analyzed or put into operation according to the conditions of an expert. Under the specified operating conditions, furnace behavior is characterized, and the relationship between voltage levels in the secondary arc and the melting process is identified. Further, a search is carried out in the furnace s feeder, and the specific mechanics in the furnace for “Tap to Tap” decrease are identified. This analysis enables the proposal of a new optimization model, which considers dynamic programming. Part of the proposal is implemented in a 17-ton furnace, used for melting and refining.
2018 IEEE Industry Applications Society Annual Meeting (IAS), 2018
In this document, the effects of UFPCs on the electric arc furnace feed system at a steel product... more In this document, the effects of UFPCs on the electric arc furnace feed system at a steel production company were investigated. This new operative strategy was determined in function of the requirements necessary for a stable arch and maximum productivity. On the basis of these new operational conditions, the adequacy of the existing flicker compensation system was examined, in terms of load balancing, power factor correction, and flickering. All of the investigations detailed in this study are supported by hardware in real time, and loop within the simulation. Further, a summarized description of a power quality work station is presented herein.
2021 IEEE Industry Applications Society Annual Meeting (IAS), 2021
This paper proposes a new integral methodology to overcome hidden failures and mitigates the elec... more This paper proposes a new integral methodology to overcome hidden failures and mitigates the electrical hazard due to arc-flash events during the protection of electrical systems. This methodology overcomes the drawbacks of present-day protective functions and their limitations. Also, considering the requirement to limit the maximum arc-flash hazard, a restriction has been implemented to coordinate the protection devices in the proposed methodology. The application results of the proposed methodology are shown on a steel manufacturer user showing the improvements by reducing the probably incident energy feasible due to arc-flash events.
This article proposes a new adaptive commissioning methodology for arc flash mitigation in steel ... more This article proposes a new adaptive commissioning methodology for arc flash mitigation in steel manufacturer users considering the Tap-to-Tap varying current consumption. This process is achieved through adaptative protection settings computed to reduce the total clearing time of relays adding the restriction of the incident energy. The proposed methodology carries out the detection of abrupt changes in current consumption to detect Tap-to-Tap change in operation stages of electric arc furnaces. The application of this methodology is performed on a steel manufacturer user and shows the reduction of the incident energy values according to Tap-to-Tap operation cycle.
2019 IEEE Industry Applications Society Annual Meeting, 2019
In this paper the feasibility study of the use of solid-state transformers to feed an electric ar... more In this paper the feasibility study of the use of solid-state transformers to feed an electric arc furnace is carried out. The proposal is based on the specifications of an electric arc furnace transformer of 28kVA installed in a local steel manufacturing facility. Thermal and chargeability tests are carried out on solid state transformers in order to determine their performance and the level of deterioration caused by thermal stresses to which they could be subject in electric arc furnace installations. This will allow the definition of the level of wear according to the overload conditions as well as the development of a methodology to calculate the wear and reliability of the equipment, and thus be able to assess its performance compared with conventional oil-filled transformers.
In this paper, energy losses minimization in smart microgrids using capacitors banks and energy s... more In this paper, energy losses minimization in smart microgrids using capacitors banks and energy storage systems. An optimization methodology based on heuristic search is presented. The proposed methodology approach was developed as a management system based on losses control. This management system works centrally in order to improve the voltage profile and to reduce energy losses to its minimum values. The 33-bus test system (modified) was used to evaluate the performance of the proposed method.
2019 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), 2019
This paper presents a proposal of voltage sag detection algorithm based on cumulative sums algori... more This paper presents a proposal of voltage sag detection algorithm based on cumulative sums algorithms (CUSUM) and harmonic component decomposition of Tensor Theory (TT) unified index through Kalman Filter (KF). Algorithm provide a reduce computational burden at same time it granted small detection delays and high-effectivity detection respect to state-of-the-art sag detection algorithms. Computational burden reduction was possible by using of TT voltage representation and reduction of the KF order. Abrupt changes on TT representation and rapid estimation on KF permit evidence a large deviation on signal probability function parameters (PFP) during voltage sag. Two-sided CUSUM algorithm take advantage of PFP deviations to make fast and accurate detection. Test for proposal and state-of-the-art algorithms was development. A large voltage sag record data base was used to test algorithms performance under low sampling conditions. Effectiveness, accuracy and computational burden were the...
2018 IEEE Industry Applications Society Annual Meeting (IAS), 2018
The present article proposes a relay simulation test bench to reduce the steel manufacturer prote... more The present article proposes a relay simulation test bench to reduce the steel manufacturer protection system misoperation. The focus of this article is the protection coordination sensitivity, due to variable consumption currents and inadequate protection relay settings/logic. Particularly, the identification of sensitive areas that may suffer from cascade tripping or a hidden fault is shown. An automation coordination process is performed following the identification of the sensitive area, so as to reduce the risk of misoperation trip.
2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016
This paper describes a new method used to analyze problems associated with power line faults. Ove... more This paper describes a new method used to analyze problems associated with power line faults. Overvoltage analysis techniques are evaluated. The complete system, including power cables and power ground is simulated in a workstation for transient practices with several laboratory practices using an experimental rele. A new method for power quality analysis, and detection of switching of the reclose rele is proposed. Comparisons between the power cable models are including. Experimental results of adverse effects in a power distribution feeder and long power cables from transient's lines are shown.
2017 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), 2017
Power system protection coordination plays the main role in the continuity of service in electric... more Power system protection coordination plays the main role in the continuity of service in electrical systems. Incorrect settings may allow that repetitive failures occur before triggering an interruption. Consequently, it is necessary to identify the devices that clear a fault to assess its operation. The identification process can be achieved by a signature that each device induces in the voltage and current waveforms. As a proposal, this article presents a new method in the analysis of the transients related to the operation of the protections in the distribution systems for identification of protective devices. This method has the ability to detect transient changes and characterize the quality disturbances of three-phase systems.
2020 IEEE Industry Applications Society Annual Meeting, 2020
This paper proposes the development of a small-scale prototype of a steel manufacturer user. This... more This paper proposes the development of a small-scale prototype of a steel manufacturer user. This work arises from a requirement in the test of new technological processes in steel production, giving a high level of trust to industrial facilities, this requirement is referenced through the assessment of working groups related to steel production. The paper presents an evaluation of the operational conditions of the electric arc furnace, the rolling mill loads, and the communication system. The work aims for the integration of small-scale prototypes that simulate the operation in a steel manufacturer user. This prototype will be used for the test of new control, protection, and operation methodologies of steel manufacturer users.
2017 IEEE Industry Applications Society Annual Meeting, 2017
Recorders provide information related to the “tap to tap” Arc Furnace's operation time. In th... more Recorders provide information related to the “tap to tap” Arc Furnace's operation time. In this article, a heuristic analysis is performed for electric arc furnace operation. At a later stage of the investigation, an optimization of the operation is performed. Each step of the process is analyzed or put into operation according to the conditions of an expert. Under the specified operating conditions, furnace behavior is characterized, and the relationship between voltage levels in the secondary arc and the melting process is identified. Further, a search is carried out in the furnace s feeder, and the specific mechanics in the furnace for “Tap to Tap” decrease are identified. This analysis enables the proposal of a new optimization model, which considers dynamic programming. Part of the proposal is implemented in a 17-ton furnace, used for melting and refining.
2018 IEEE Industry Applications Society Annual Meeting (IAS), 2018
In this document, the effects of UFPCs on the electric arc furnace feed system at a steel product... more In this document, the effects of UFPCs on the electric arc furnace feed system at a steel production company were investigated. This new operative strategy was determined in function of the requirements necessary for a stable arch and maximum productivity. On the basis of these new operational conditions, the adequacy of the existing flicker compensation system was examined, in terms of load balancing, power factor correction, and flickering. All of the investigations detailed in this study are supported by hardware in real time, and loop within the simulation. Further, a summarized description of a power quality work station is presented herein.
2021 IEEE Industry Applications Society Annual Meeting (IAS), 2021
This paper proposes a new integral methodology to overcome hidden failures and mitigates the elec... more This paper proposes a new integral methodology to overcome hidden failures and mitigates the electrical hazard due to arc-flash events during the protection of electrical systems. This methodology overcomes the drawbacks of present-day protective functions and their limitations. Also, considering the requirement to limit the maximum arc-flash hazard, a restriction has been implemented to coordinate the protection devices in the proposed methodology. The application results of the proposed methodology are shown on a steel manufacturer user showing the improvements by reducing the probably incident energy feasible due to arc-flash events.
This article proposes a new adaptive commissioning methodology for arc flash mitigation in steel ... more This article proposes a new adaptive commissioning methodology for arc flash mitigation in steel manufacturer users considering the Tap-to-Tap varying current consumption. This process is achieved through adaptative protection settings computed to reduce the total clearing time of relays adding the restriction of the incident energy. The proposed methodology carries out the detection of abrupt changes in current consumption to detect Tap-to-Tap change in operation stages of electric arc furnaces. The application of this methodology is performed on a steel manufacturer user and shows the reduction of the incident energy values according to Tap-to-Tap operation cycle.
2019 IEEE Industry Applications Society Annual Meeting, 2019
In this paper the feasibility study of the use of solid-state transformers to feed an electric ar... more In this paper the feasibility study of the use of solid-state transformers to feed an electric arc furnace is carried out. The proposal is based on the specifications of an electric arc furnace transformer of 28kVA installed in a local steel manufacturing facility. Thermal and chargeability tests are carried out on solid state transformers in order to determine their performance and the level of deterioration caused by thermal stresses to which they could be subject in electric arc furnace installations. This will allow the definition of the level of wear according to the overload conditions as well as the development of a methodology to calculate the wear and reliability of the equipment, and thus be able to assess its performance compared with conventional oil-filled transformers.
In this paper, energy losses minimization in smart microgrids using capacitors banks and energy s... more In this paper, energy losses minimization in smart microgrids using capacitors banks and energy storage systems. An optimization methodology based on heuristic search is presented. The proposed methodology approach was developed as a management system based on losses control. This management system works centrally in order to improve the voltage profile and to reduce energy losses to its minimum values. The 33-bus test system (modified) was used to evaluate the performance of the proposed method.
2019 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), 2019
This paper presents a proposal of voltage sag detection algorithm based on cumulative sums algori... more This paper presents a proposal of voltage sag detection algorithm based on cumulative sums algorithms (CUSUM) and harmonic component decomposition of Tensor Theory (TT) unified index through Kalman Filter (KF). Algorithm provide a reduce computational burden at same time it granted small detection delays and high-effectivity detection respect to state-of-the-art sag detection algorithms. Computational burden reduction was possible by using of TT voltage representation and reduction of the KF order. Abrupt changes on TT representation and rapid estimation on KF permit evidence a large deviation on signal probability function parameters (PFP) during voltage sag. Two-sided CUSUM algorithm take advantage of PFP deviations to make fast and accurate detection. Test for proposal and state-of-the-art algorithms was development. A large voltage sag record data base was used to test algorithms performance under low sampling conditions. Effectiveness, accuracy and computational burden were the...
2018 IEEE Industry Applications Society Annual Meeting (IAS), 2018
The present article proposes a relay simulation test bench to reduce the steel manufacturer prote... more The present article proposes a relay simulation test bench to reduce the steel manufacturer protection system misoperation. The focus of this article is the protection coordination sensitivity, due to variable consumption currents and inadequate protection relay settings/logic. Particularly, the identification of sensitive areas that may suffer from cascade tripping or a hidden fault is shown. An automation coordination process is performed following the identification of the sensitive area, so as to reduce the risk of misoperation trip.
2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016
This paper describes a new method used to analyze problems associated with power line faults. Ove... more This paper describes a new method used to analyze problems associated with power line faults. Overvoltage analysis techniques are evaluated. The complete system, including power cables and power ground is simulated in a workstation for transient practices with several laboratory practices using an experimental rele. A new method for power quality analysis, and detection of switching of the reclose rele is proposed. Comparisons between the power cable models are including. Experimental results of adverse effects in a power distribution feeder and long power cables from transient's lines are shown.
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