{"title":"Physics-Informed Graph Neural Networks for Collaborative Dynamic Reconfiguration and Voltage Regulation in Unbalanced Distribution Systems","authors":"Jingtao Qin;Rui Yang;Nanpeng Yu","doi":"10.1109/TIA.2025.3529799","DOIUrl":"https://doi.org/10.1109/TIA.2025.3529799","url":null,"abstract":"Network reconfiguration has long been employed as a strategic approach to minimize power distribution system losses and effectively regulate voltage levels. Tap-changing voltage regulators are also critical for controlling bus voltages, especially in accommodating the increasing integration of distributed energy resources (DERs) with intermittent outputs. This paper introduces novel methodologies to address the challenges of dynamic reconfiguration and optimal tap setting in unbalanced three-phase distribution systems. We propose an approximated mixed-integer quadratically constrained program (MIQCP) to model dynamic reconfiguration, along with a pioneering formulation for voltage regulator (VR) tap-setting based on Special Ordered Set type 1 (SOS1). To mitigate computational complexity, we propose a physics-informed spatial-temporal graph convolutional network (STGCN) with an integrated link classifier. The proposed approach enables efficient solution generation by fixing specific variables in the MIQCP instance and solving the simplified sub-MIP using an MIP solver. Numerical studies demonstrate the superior prediction accuracy of our STGCN model compared to baseline neural network models, resulting in reduced DER curtailment and voltage deviation with shorter computation time.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"2538-2548"},"PeriodicalIF":4.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seyedmilad Kazemisangdehi;Z. Q. Zhu;Yanjian Zhou;Hailong Liu;Liang Chen;Lei Yang
{"title":"Novel Parallel Hybrid Rare-Earth and Ferrite Magnets in V-Spoke Interior PM Synchronous Machine","authors":"Seyedmilad Kazemisangdehi;Z. Q. Zhu;Yanjian Zhou;Hailong Liu;Liang Chen;Lei Yang","doi":"10.1109/TIA.2024.3524978","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524978","url":null,"abstract":"This paper introduces a novel interior permanent magnet synchronous machine (IPMSM) using a parallel configuration of hybrid rare-earth and ferrite permanent magnets (HPMs) and V-shape arrangement of spokes. Aiming at the same torque with lower volume of rare-earth PMs (REPMs) than a double V-shape IPMSM for EV application, the proposed parallel HPM V-spoke IPMSM is designed and optimized by genetic algorithm. In addition, the electromagnetic performance, mechanical strength at high speed and demagnetization withstand capability of ferrite magnets are analyzed using finite element analyses (FEA). It is shown that at the same torque, the REPM volume can be reduced by 37% leading to about 30% reduction of total PM cost. Although the total mass of PMs is almost doubled, the introduced verge and gap in the proposed parallel HPM V-spoke design can significantly reduce the maximum von-mises stress on ribs and keep it close to that of the benchmark. In addition, the demagnetization withstand capability of ferrite magnet proves a high tolerance against irreversible demagnetization except a small region close to the REPM. A scaled prototype is made and tested to verify the FEA.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"2972-2982"},"PeriodicalIF":4.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bi-Level Optimal Design of Integrated Energy System With Synergy of Renewables, Conversion, Storage, and Demand","authors":"Lizhi Zhang;Hui Zhang;Fan Li;Bo Sun","doi":"10.1109/TIA.2024.3524950","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524950","url":null,"abstract":"Integrated energy systems (IESs) that combine biogas, solar, and wind energy sources demonstrate considerable potential for effective utilization of renewable energy, which is instrumental for achieving carbon neutrality. The enhancement in their energetic and economic performances relies on optimal design methods that need to consider the combined optimization of capacity and operation and synergy between biogas production, energy conversion, storage, and demand. Therefore, this study proposes a bi-level optimal design method for a biogas–solar–wind IES. First, an exergy hub model is established to accurately describe the variations in the energy quantity and quality resulting from energy conversion processes. Then, the combined capacity and operation optimization problem of the IES is formulated as a bi-level iterative model, and a full-time-series clustering method based on multi-attribute weighting is employed to obtain typical source–load scenarios. The first level is designed to maximize the cost and exergy savings and determine the rated capacities of renewables, energy conversion and storage components; the second level synergistically optimizes the operation schemes of energy conversion, storage, and demand components by incorporating a thermodynamic model of biogas production along with an electrical demand response program. And the iterative optimization mechanisms between these two levels are established. Moreover, a hybrid algorithm combining a genetic algorithm and sequential quadratic programming method is developed to solve the bi-level model. Finally, the feasibility and effectiveness of the proposed method are verified through case studies.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"2170-2181"},"PeriodicalIF":4.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Hybrid Modulation Approach for Step-Up/Down Partial Power Converter With Improved MPPT Efficiency Around Zero Partiality","authors":"Neelesh Yadav;Andrii Chub;Naser Hassanpour;Andrei Blinov;Dmitri Vinnikov;Ilya Galkin","doi":"10.1109/TIA.2025.3525607","DOIUrl":"https://doi.org/10.1109/TIA.2025.3525607","url":null,"abstract":"Step-up/down partial power converters (PPCs) offer lower partiality and increased efficiency, as evidenced by the literature. However, their operation near zero partiality, i.e., with the same source and load voltage, is challenging if the converter maintains the same modulation technique. This is because the capacitor does not have enough energy to provide the required voltage gain when a PPC operates at zero series port voltage. This renders a step-up/down PPC unsuitable for practical use in photovoltaic (PV) applications, resulting from using a conventional modulation. At near-zero partiality operation, the maximum power point tracking (MPPT) efficiency drops around zero voltage in the series port. The paper proposes a hybrid modulation MPPT method that allows PPC to operate smoothly near zero partiality coefficient, enhancing MPPT efficiency. The proposed hybrid modulation utilizes a reverse power flow, i.e., the circulating energy, to charge the inductor with energy, enabling current controllability near zero partiality. However, PPC employs PSM outside the low partiality region due to the higher efficiency provided. Experiment studies confirm the effectiveness of the proposed approach. A 2.5 kW PPC prototype connected to a 350 V dc bus demonstrates MPPT efficiency of 99.56% during transitions between operating quadrants. A comparative assessment of the proposed approach with some existing methods is also carried out to justify its superiority.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"3259-3268"},"PeriodicalIF":4.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexandros Y. Hadjicostas;Evangelos T. Staikos;Zacharias G. Datsios;George D. Peppas;Thomas Tsovilis
{"title":"Surge Protection of Charging Stations Against Impinging Overvoltages Due to Lightning Strikes to Incoming Medium Voltage Overhead Line","authors":"Alexandros Y. Hadjicostas;Evangelos T. Staikos;Zacharias G. Datsios;George D. Peppas;Thomas Tsovilis","doi":"10.1109/TIA.2024.3524952","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524952","url":null,"abstract":"A typical 1 MVA charging station for electric cars connected to the overhead distribution system through underground medium voltage cables is modeled in the ATP-EMTP environment. Fast-front overvoltages impinging on the AC and DC sides of charging station equipment due to a wide range of lightning strikes to the incoming overhead medium voltage line are computed; positive and negative recorded lightning stroke currents are also considered. The risk of failure is evaluated by considering the rated impulse withstand voltage level of the charging station equipment by assessing the effects of lightning polarity, peak current, and soil resistivity. A protection scheme involving the installation of surge protective devices is investigated to diminish the risk of failure of equipment and interconnected charging cars. The energy absorption capability of surge protective devices against remote lightning strikes is assessed and the necessity of integrating surge protective devices to electric vehicles offering dedicated surge protection is discussed.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"2324-2335"},"PeriodicalIF":4.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10820998","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Efficient Energy Management in Seawater Pumping Systems: Solar Hybridization and Storage for Demand Optimization","authors":"Franco Cekalovic;Daniel Sbarbaro;Luis Moran","doi":"10.1109/TIA.2024.3524985","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524985","url":null,"abstract":"This paper investigates the use of demand-side management (DSM) strategies based on economic model predictive control (EMPC) to optimize the operation of seawater pumping systems, focusing on integrating solar energy and battery storage. The study considers both real-time pricing (RTP) and maximum demand (MD) tariff types. The proposed model combines reservoirs, photovoltaic (PV) energy source, and batteries to perform load shifting and manage peak demand. Four scenarios were analyzed for a grid connected pumping system: load shifting with reservoirs; load shifting with reservoirs and PV energy sources; load shifting with reservoirs and energy storage; and load shifting with reservoirs, energy storage, and PV energy sources. Simulation results for a large mining water supply pump station demonstrate that operational costs can be significantly reduced through load shifting with reservoirs, utilizing solar energy to lower maximum demand, and including batteries for further load shifting and increased flexibility in peak demand management. The use of batteries alone for energy storage results in the least cost reduction compared to the other scenarios. DSM strategies based on EMPC enable the plant to respond to changing energy prices and demand patterns, leading to cost savings while ensuring reliable operation.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"1854-1862"},"PeriodicalIF":4.2,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comprehensive Design and Performance Analysis of Series Dual Axial Flux Permanent Magnet Machine","authors":"Zhenxing Guo;Bing Peng;Haiying Wu;Dongfang Zhen","doi":"10.1109/TIA.2024.3524486","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524486","url":null,"abstract":"In order to solve the problems of high slot leakage, low power factor and low electromagnetic torque of deep-slot axial flux permanent magnet machine (AFPM), a series dual axial flux permanent magnet machine (SD-AFPM) with four stators was proposed. Firstly, the electromagnetic properties of the SD-AFPM, inner rotor machine (IR-AFPM) and multi-disc series machine (SMD-AFPM) are compared comprehensively to demonstrate the effectiveness of the proposed SD-AFPM in improving power factor and electromagnetic torque. Secondly, a three-channel cooling system for the SD-AFPM, based on the structural characteristics, is designed, and the heat dissipation capacity of the cooling system is analyzed by three dimensions finite element analysis (3D-FEA). Then, the strength of the rotor is checked under the consideration of electromagnetic force, centrifugal force and temperature. Finally, a 36kW prototype is manufactured, and the feasibility of the SD-AFPM and the effectiveness of the three-channel cooling system are verified by experiments and finite element analysis.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"2961-2971"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Implementation of Underwater Inductive Power Transfer Systems With An Accurate Eddy Current Loss Model Approach","authors":"Sadjad Shafiei;Seyed Saeid Heidari Yazdi;Adilkhan Kapanov;Mostafa Kermani;Almaz Saukhimov;Arsalan Hekmati;Mehdi Bagheri","doi":"10.1109/TIA.2024.3524480","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524480","url":null,"abstract":"This study analyzes an underwater inductive wireless power transfer (UIWPT) to be used in offshore vehicles. Fixating on inadvertent eddy current losses (ECLs), this study offers an approach to tackle this concern based on the optimal selection of main design parameters of Archimedean magnetic coils. An accurate analytical electromagnetic field model is derived for directly calculating ECLs, and based on the ECL model, the main design parameters of coils are selected. The electrical fundamental components of coils are calculated as a function of the selected design parameters. A numerical metaheuristic optimization method along with the formulation of a multi-objective function and inequality constraints is utilized to estimate the selected parameters of coils. This function addresses various design objectives simultaneously, considering the water medium and inequality constraints. For optimization purposes, an electrical equivalent circuit model is derived, considering the ECLs impact by reflecting these losses in the equivalent circuit model. The ECL model is verified through Finite Element Analysis (FEA). Finally, a laboratory scale setup is developed and UIWPT experiments are conducted to validate the equivalent circuit and analytical modeling, the calculation of components, and the simulation study.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"3359-3370"},"PeriodicalIF":4.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zachary J. Lythgoe;Thomas F. Long;Michael J. Buchholz;Anthony R. Livernois;Kebba Kanuteh;David R. Allee;Anamitra Pal;Ian R. Graham;Zachary D. Drummond
{"title":"Design and Validation of a Very Low-Power Phasor Measurement Unit for the Distribution System","authors":"Zachary J. Lythgoe;Thomas F. Long;Michael J. Buchholz;Anthony R. Livernois;Kebba Kanuteh;David R. Allee;Anamitra Pal;Ian R. Graham;Zachary D. Drummond","doi":"10.1109/TIA.2024.3524494","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524494","url":null,"abstract":"Phasor measurement units (PMUs) provide a high-resolution view of the power system at the locations where they are placed. As such, it is desirable to place them in bulk in low-voltage distribution circuits. However, the power consumption of a PMU/micro-PMU is on the order of Watts (W), requiring an external power supply, which both increases the overall cost as well as limits the locations where they can be placed. This work details the hardware design of a PMU capable of measuring and reporting voltage and current phasors for a single-phase system at an average power consumption of only 30.8 mW—one to two orders of magnitude lower than existing academic and commercial PMUs. This enables the proposed PMU to run for two weeks using an 11-Wh battery or indefinitely if paired with an inexpensive solar panel. A test bench developed in accordance with the 2018 IEC/IEEE 60255-118-1 PMU Standard confirms the accuracy of this PMU, and a Fluke 6135A PMU calibration system evaluates its performance under realistic conditions. Given its low power consumption, the proposed design is expected to accelerate adoption of PMUs in modern distribution grids.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"3553-3562"},"PeriodicalIF":4.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sheikh T. Meraj;Samson S. Yu;Kamrul Hasan;Hieu M. Trinh;Peng Shi
{"title":"An Advanced Frequency Adaptive PLL for Grid Connected Inverters Under Abnormal Grid Conditions","authors":"Sheikh T. Meraj;Samson S. Yu;Kamrul Hasan;Hieu M. Trinh;Peng Shi","doi":"10.1109/TIA.2024.3524481","DOIUrl":"https://doi.org/10.1109/TIA.2024.3524481","url":null,"abstract":"The necessity to expand the use of distributed renewable energy sources (DERS) with grid-connected inverters has emphasized the critical role of phase-locked loop (PLL) controllers in swiftly and accurately acquiring grid voltage phase angles, particularly under abnormal grid conditions. Frequency adaptive PLL has gained popularity due to its low computational burden, fast phase angle detection, and excellent harmonic rejection at nominal grid frequency. Unfortunately, due to spectral leakage at abnormal frequencies, conventional frequency adaptive PLLs bears inaccuracies in both magnitude and phase angle estimation. To resolve this situation, this study proposes an advanced frequency-adaptive PLL (AFA-PLL), which can work under abnormal grid frequencies or harmonics and avoid spectral leakage by implementing a variable window length phase detector. To achieve frequency adaptivity, the AFA-PLL innovatively employs a Fourier transformation-based sliding-mode controller (FTSMC). FTSMC utilizes a recursive interpretation of Fourier transform method by filtering the double frequency oscillations of the abnormal grid. Therefore, making the AFA-PLL highly capable of coping with abnormalities rapidly and effectively. Through extensive simulations and experiments under various abnormal grid conditions, the superior performance of the AFA-PLL is validated, which shows a 56 ms transient response, ±0.03 Hz oscillations and 3.23%. harmonics. Moreover, comprehensive comparison studies with recently proposed PLLs are conducted to further verify its effectiveness.","PeriodicalId":13337,"journal":{"name":"IEEE Transactions on Industry Applications","volume":"61 2","pages":"1863-1875"},"PeriodicalIF":4.2,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}