{"title":"Strategy Optimization by Means of Evolutionary Algorithms With Multiple Closing Criteria for Energy Trading","authors":"Silvia Trimarchi;Fabio Casamatta;Francesco Grimaccia;Marco Lorenzo;Alessandro Niccolai","doi":"10.1109/OJIA.2024.3488857","DOIUrl":"https://doi.org/10.1109/OJIA.2024.3488857","url":null,"abstract":"The energy markets are experiencing an enhanced volatility and unpredictability due to the growing integration of renewable energy sources in the grid and to the unstable geopolitical situation that is developing worldwide. Energy traders are therefore raising concerns on how to achieve solutions that not only ensure stability in terms of energy needs, both on the supply and demand side, but also enable profits within these markets. To cope with the complexity of this emerging scenario, tools that support traders in their decisions, such as algorithmic trading strategies, are attracting always more and more attention. In particular, evolutionary algorithms have emerged as an effective tool for developing robust and innovative trading strategies. Indeed, their flexibility and adaptability allow for the inclusion of various performance metrics. This article employs a recently issued evolutionary algorithm, called social network optimization, to identify the optimal closing criteria of already opened positions in an energy commodity market. More specifically, the proposed trading strategy is based on five self-defined parameters, which determine a profitable solution over nearly six years of available data. In particular, the overall average positive return achieved and the maximum monthly yield of 1.9% highlight the adaptability and robustness of the developed algorithmic trading strategy. Therefore, the results suggest the potentialities of developing and upgrading novel trading strategies by exploiting evolutionary computation techniques in the actual complex energy markets.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"469-478"},"PeriodicalIF":7.9,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10740313","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A SiC Based Two-Stage Pulsed Power Converter System for Laser Diode Driving and Other Pulsed Current Applications","authors":"Raj Kumar Kokkonda;Subhashish Bhattacharya;Victor Veliadis;Chrysanthos Panayiotou","doi":"10.1109/OJIA.2024.3476428","DOIUrl":"https://doi.org/10.1109/OJIA.2024.3476428","url":null,"abstract":"High-power laser diodes (LDs) are used in various military, medical, and industrial applications. In this article, the unique driving requirements of a high power pulsed LD array have been presented, and the required converter architecture has been discussed. A two-stage capacitive energy storage based pulsed power converter system consisting of a phase shifted full bridge (PSFB) based capacitor charging power supply (CCPS) and a buck based pulse current source with inductor energy recovery has been adopted. SiC FETs have been employed to increase the pulsed power capability of the switching regulator based pulse current source as an alternative to the conventionally used linear current driver. A reconfigured pulse forming circuit has been proposed for the pulse current source, which mitigates the effect of the output parasitic inductance on the LD without the need for an additional freewheeling diode across the load. The impact of inductor energy recovery on the semiconductor device's transient thermal stress in the pulse current source has been investigated. The tradeoff between the energy storage capacitance and the filter inductor in the pulse current source has been studied. A pulsed LD driver capable of driving 280 V LD arrays has been designed, and a hardware prototype has been built. The complete system has been experimentally demonstrated by generating 50 A current pulses at 250 V output voltage, validating the proposed converter configuration for high pulsed power LD driving applications.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"455-468"},"PeriodicalIF":7.9,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10711203","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yifei Cai;Fares S. El-Faouri;Akira Chiba;Souichiro Yoshizaki
{"title":"Magnetostriction Effect on Vibration and Acoustic Noise in Permanent Magnet Synchronous Motors","authors":"Yifei Cai;Fares S. El-Faouri;Akira Chiba;Souichiro Yoshizaki","doi":"10.1109/OJIA.2024.3476193","DOIUrl":"https://doi.org/10.1109/OJIA.2024.3476193","url":null,"abstract":"This study investigates the contribution of magnetostriction to vibration and acoustic noise in interior permanent magnet synchronous motors using finite element analysis and experiments on two test machines. The two motors have identical dimensions but different iron core materials. The first motor is made of 6.5% high-silicon steel 10JNEX900 with a negligible magnetostriction (0.3 ppm at 1T), and the second motor is made of amorphous iron 2605SA1 with a significantly high magnetostriction (11.0 ppm at 1T). Using finite element analysis, the electromagnetic forces, equivalent magnetostrictive forces, and resultant vibrations are compared between the two motors. The results reveal a significant counteraction between magnetostrictive vibrations and those caused by electromagnetic forces at the multiples of the sixth vibration harmonic in the amorphous iron motor. This counteraction effect was then verified experimentally. In the experiment, the amorphous iron motor exhibited similar or even lower vibrations at the multiples of the sixth harmonic but significantly higher vibrations at other harmonics. These experimental observations can only be justified by considering magnetostriction. Such experimental evidence, which has not been reported in the existing literature, highlights the importance of accounting for magnetostriction when evaluating vibration and acoustic noise in motors.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"442-454"},"PeriodicalIF":7.9,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10707194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sebastian O. Maestri;Gilles Le Godec;Olivier Michels
{"title":"App-Based Tool for Automatic Controller Parameters Assessment for Power Converters in Particle Accelerator Facilities","authors":"Sebastian O. Maestri;Gilles Le Godec;Olivier Michels","doi":"10.1109/OJIA.2024.3460481","DOIUrl":"10.1109/OJIA.2024.3460481","url":null,"abstract":"Regulation coefficients assessment in a particle accelerator power conversion system depends on the topology, the magnet and the desired transient response. The series/parallel combination of a generic power converter (a \u0000<italic>brick</i>\u0000) to develop a larger one (e.g., the SIRIUS power converter family developed at CERN) allows to feed several magnets with different parameters. Then, such standardization allows to develop a control platform and associated regulation system that is common to all the possible configurations. Regardless of the clear flexibility, the commissioning of these converters faces some drawbacks, like the large amount of coefficient sets and the tuning performed for different workers: this leads to certain inconsistency and spread in the transient responses obtained, which is coherent with the inherent subjectivity of the adopted approach. In this work, a methodology for automatic identification of regulator coefficients is developed. From the definition of a desired time transient response, the method uses the response to a step voltage test to evaluate some figures of merit and the particle swarm technique to change the coefficients accordingly to the error obtained. A MATLAB-based app to implement the method in a user-friendly environment is developed. Experimental results based on a \u0000<inline-formula><tex-math>$400operatorname{kW}$</tex-math></inline-formula>\u0000 prototype validate the proposal.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"405-413"},"PeriodicalIF":7.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10680196","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Model Predictive Control in Multilevel Inverters Part II: Renewable Energies and Grid Applications","authors":"Margarita Norambuena;Andres Mora;Cristian Garcia;Jose Rodriguez;Mokhtar Aly;Fernanda Carnielutti;Javier Pereda;Cristian Castillo;Zhenbin Zhang;Venkata Yaramasu;Luca Tarisciotti;Yafei Yin","doi":"10.1109/OJIA.2024.3460668","DOIUrl":"10.1109/OJIA.2024.3460668","url":null,"abstract":"This article presents the use of model predictive control (MPC) in multilevel inverters for some applications, such as, first, wind generation and, second, photovoltaics, showing that the particular restrictions of each of them can be very easily included in the control algorithm, which is an important advantage of this technique. Another application is in modular multilevel cascaded converters, where it is demonstrated that MPC can operate with very few calculations and fixed switching frequency. The second part of this article is dedicated to comparing MPC with linear control and pulsewidth modulation for multilevel inverters. The main comparison criteria are the switching losses, the distortion in the load current, and the number of commutations. The main conclusion is that MPC is a competitive alternative to linear control for application in multilevel inverters.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"414-427"},"PeriodicalIF":7.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10680135","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Model Predictive Control in Multilevel Inverters Part I: Basic Strategy and Performance Improvement","authors":"Cristian Garcia;Andres Mora;Margarita Norambuena;Jose Rodriguez;Mokhtar Aly;Fernanda Carnielutti;Javier Pereda;Pablo Acuna;Ricardo Aguilera;Luca Tarisciotti","doi":"10.1109/OJIA.2024.3460669","DOIUrl":"10.1109/OJIA.2024.3460669","url":null,"abstract":"Multilevel inverters (MLIs) have lately become important due to their extended application to electrical transmission and distribution systems. At the same time, the control and modulation of MLIs are especially challenging due to the high number of switching states, many of them redundant in terms of output voltage generation, and their nonlinear characteristics. In order to ease their implementation in real environment, model predictive control (MPC) is often considered, where the main control targets are: 1) to generate a the desired output current and 2) to keep the internal converter capacitor voltages at their reference value. However, a major issue with the implementation of MPC in MLIs is that the number of calculations to be done online increases dramatically with the number of levels, making it almost impossible to apply MPC in some practical cases. For these reasons, one of the main research trend in MPC for MLIs is to provide an algorithm which can reduce the computational burden necessary to operate the control. The article proposes a review of such control techniques. Starting from the basic MPC implementation and using a flying capacitor converter as an example the article review the basic strategies to avoid calculating the weighting factor in the cost function, simplifying the implementation. Also, methods to reduce the number of calculations necessary to implement MPC are shown and applied to cascaded H-bridge converters. These techniques allow to keep an high load current quality while reducing more than 95% in the number of calculations necessary to implement the control. Finally, other operation improvements of MPC are also included, such as fixed switching frequency operation and multistep MPC, reaching an important performance improvement compared to the basic MPC strategy.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"428-441"},"PeriodicalIF":7.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10679905","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A High-Efficiency Propulsion Motor With Distributed High-Density Winding Technology","authors":"Daniele Meanti;Davide Parati;Alexander Allca-Pekarovic;Moien Masoumi;Kumar Rajasekhara;Berker Bilgin","doi":"10.1109/OJIA.2024.3457505","DOIUrl":"10.1109/OJIA.2024.3457505","url":null,"abstract":"This article presents the development of an electric motor with the novel distributed high-density (DHD) winding technology. The DHD winding technology utilizes round wires instead of bar wires. Unlike conventional round-wire winding technique (shed winding), the wires are orderly positioned in the slots in the DHD winding technology, resulting in high fill factor and high efficiency. The implementation of a stator with the DHD winding is presented which utilizes state-of-the-art coil winding and assembly processes. To compare against existing stator designs, a 100 kW, 800 V, and 15 000 RPM propulsion motor is tested experimentally to validate the performance of the DHD winding technology. The acoustic noise behavior of the propulsion motor is also characterized experimentally. The motor efficiency with the DHD, hairpin, and shed windings is compared for the same stator geometry using simulation results to demonstrate the performance improvement with the DHD winding technology.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"391-404"},"PeriodicalIF":7.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10670318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David Klink;Matthew J. Bagnara;Greg Heins;Behrooz Bahrani
{"title":"Permanent Magnet Rotor Flux Linkage Control Through Direct Axis Field Amplification","authors":"David Klink;Matthew J. Bagnara;Greg Heins;Behrooz Bahrani","doi":"10.1109/OJIA.2024.3430047","DOIUrl":"https://doi.org/10.1109/OJIA.2024.3430047","url":null,"abstract":"Permanent magnets are popular for electric vehicle rotors due to their high energy density, making them excellent candidates for high-torque and high-speed machines. The downside of a permanent magnet machine is the inability to regulate the rotor field, creating nonideal behavior during high-speed or low-load operation, and potentially resulting in high currents and voltages in fault conditions. Several solutions to this have been explored, such as interior permanent magnet (combined reluctance and permanent magnet rotors), “hybrid” wound field and permanent magnet rotors, and variable flux machines with in-situ magnetization control or mechanical field weakening. This article proposes a novel method of regulating the air gap in axial flux machines, allowing for a low-cost mechanism allowing two degree of freedom operation without additional power electronics or modifications to the magnetics. The proposed method uses stacked linear springs to create a nonlinear bias against the attraction force, and then leverages direct axis current to control the air gap. The ideal constant current optimized field weakening spring curve is presented and the proposed concept is experimentally validated on a single-stator single-rotor axial flux machine.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"369-380"},"PeriodicalIF":7.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10670564","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142165099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nicolas E. Lima Baschera;Alessandro Lidozzi;Giuseppe Zummo;Luca Saraceno;Fabio Riccardi;Fernando Ortenzi;Marco di Benedetto;Luca Solero
{"title":"Advances in Two-Phase Cooling for Next Power Electronics Converters","authors":"Nicolas E. Lima Baschera;Alessandro Lidozzi;Giuseppe Zummo;Luca Saraceno;Fabio Riccardi;Fernando Ortenzi;Marco di Benedetto;Luca Solero","doi":"10.1109/OJIA.2024.3451990","DOIUrl":"10.1109/OJIA.2024.3451990","url":null,"abstract":"This article deals with a comprehensive analysis and performance evaluation of a fully integrated two-phase cooling system for power converters. A suitable test bed has been properly manufactured to perform the experimental campaign for the evaluation of the benefits and to deploy a dedicated management procedure of the two-phase cooling. The system is tested under real operating conditions, in which the system is employed for cooling a 1200-V 100-A insulated-gate bipolar transistor (IGBT) power module of an inverter controlling a permanent magnet synchronous machine. The experimental results show the inverter temperature behavior in start-up for different flow rates of coolant and different temperatures of the fluid on the secondary system. In the steady-state operation, using lower coolant flow rates in the primary circuit achieved equal or even better cooling for the IGBT module compared with higher flow rates. With respect to traditional cooling approaches, the proposed arrangement allows a greater extraction of the heat at a very low flow rate of the cooling fluid, even with standard industrial grade heat sinks, which motivates the use of this cooling technology for the next generation of power electronics converters.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"381-390"},"PeriodicalIF":7.9,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10663977","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Filipe Pinarello Scalcon;Gaoliang Fang;Cesar José Volpato Filho;Sumedh Dhale;Babak Nahid-Mobarakeh
{"title":"Optimization of Analytical TSFs for DC-Link Current Reduction in Switched Reluctance Motors","authors":"Filipe Pinarello Scalcon;Gaoliang Fang;Cesar José Volpato Filho;Sumedh Dhale;Babak Nahid-Mobarakeh","doi":"10.1109/OJIA.2024.3441308","DOIUrl":"https://doi.org/10.1109/OJIA.2024.3441308","url":null,"abstract":"The large dc-link current is a known issue in switched reluctance motor (SRM) drives, which often demand the use of a bulky dc-link capacitor. However, control techniques can be designed and optimized to lessen this issue. In this context, this article proposes the optimization of analytical torque sharing functions (TSFs) for dc-link current reduction in SRMs. Initially, the analytical TSFs are described, and the importance of adequate parameter selection is highlighted. Next, an optimization procedure based on the nondominated sorting genetic algorithm II is proposed to determine the optimal turn-\u0000<sc>on</small>\u0000 and overlap angles by solving a multiobjective optimization problem considering torque rms error and dc-link rms current as objectives to be minimized, something not previously reported in the literature. The pareto fronts for different operating conditions are presented, including both soft and hard chopping operation, as well as different sampling frequencies. Then, an approach for selecting a solution from within the pareto front is described, enabling the result from the pareto front that yielded the desired tradeoff between torque RMSE and dc-link current to be identified. Experimental results are provided to support the effectiveness of the proposal. A comparison between three different cases is shown, highlighting the tradeoff between objectives.","PeriodicalId":100629,"journal":{"name":"IEEE Open Journal of Industry Applications","volume":"5 ","pages":"356-368"},"PeriodicalIF":7.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10633794","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142013335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}