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A multilevel inverter structure with open circuit fault-tolerant capability Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Niraj Kumar Dewangan, Tarun Kumar Tailor, Rekha Agrawal, Pallavee Bhatnagar, Krishna Kumar Gupta
Modularity, efficiency, power quality, and high reliability are the attractive advantages of multilevel inverters (MLIs). But it has limitations in terms of an increased number of semiconductor devices as compared to conventional 2-level inverters. In this paper, a fault-tolerant single-phase 5-level MLI configuration is proposed. The proposed fault-tolerant configuration of the MLI can significantly
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Upgradation of grid-connected water pumping system integrating multifunction PV inverter with reduced sensor Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Rajan Vinodray Vamja, Mahmadasraf A. Mulla
This article presents upgradation of existing grid-connected direct online-start water pumping system by integration of multifunction photovoltaic inverter. The multifunction photovoltaic inverter is operated using a voltage-oriented control such that it delivers the reactive power in addition to the real solar photovoltaic power to deal with practical issues like steady-state grid voltage variation
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A new semi-analytical approach for self and mutual inductance calculation of hexagonal spiral coil used in wireless power transfer systems Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Emrullah Aydin, Emin Yildiriz, M. Timur Aydemir
Several methods have been proposed in the literature for the calculation of self and mutual inductance. These methods include the use of complex integral analysis, the necessity of having primary and secondary coils with the same dimensions and the limitations of the ratio of the coil dimension to the distance between the coils. To overcome these restrictions, a new semi-analytical estimation method
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Magnetic modeling, comparative study and prototyping of a Triple-speed coaxial magnetic gear Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Ali Moghimi, Mahmood Hosseini Aliabadi, Hassan Feshki Farahani
This paper proposes the electromagnetic modeling, prototype realization and test validation of a new triple-speed coaxial magnetic gear (TSCMG) for high torque/volume applications. The proposed magnetic gear is comprised of three rotors: inner rotor, middle rotor and outer rotor. The middle rotor has been changed to a new single-layer structure. Also, the proposed gear is compared with a conventional
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Comparison of low-frequency non-sinusoidal measurement for transformer no-load characteristics based on different interpolation methods Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Xuejun Chen, Ning Yang, Yongming Yang
As the calculation of transformer no-load characteristics measured by low-frequency test method is not perfect, different interpolation methods are explored to fit and convert the transformer's volt-ampere characteristics under power frequency (50 Hz) excitation to find the best interpolation fitting conversion method. The no-load test of transformer is carried out by using 10 Hz, 15 Hz, 20 Hz low-frequency
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Optimal management of electrical power systems for losses reduction in the presence of active distribution networks Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 D. Marujo, G. L. Zanatta, H. A. R. Floréz
Encouraged by the increasing electric energy consumption, the distributed generation has been widely included in the electrical power system. However, renewable energy resources have intermittent characteristics. When the distributed generation is high at certain times of the day, the energy generation at distribution systems can become higher than the required power. The surplus energy is returned
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Impact of wind power generation on ATC calculation with uncertain equal load Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Aishvarya Narain, S. K. Srivastava, S. N. Singh
Available transfer capability (ATC) is very important for system operators for a fair and transparent electricity market. There are many methods to calculate and to improve the ATC value in the power system. Due to green energy focus across the globe, renewable energy integration to the system to improve the ATC value need to be established. Lots of literature have been published on wind power integration
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IGBT open-circuit fault detection for voltage source inverters using DC bus magnetic field signal Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Hoang-Giang Vu, Hamed Yahoui
This paper proposes a detection method of open-circuit fault of insulated-gate bipolar transistor in the voltage source inverters. The magnetic field signal at the DC bus of the inverter is collected and analysed to detect the fault. First, the simulation is developed for a voltage source inverter-fed induction machine drive which operates in healthy state and single switch open-circuit conditions
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Domestic demand-side management: analysis of microgrid with renewable energy sources using historical load data Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Christian Hecht, David Sprake, Yuriy Vagapov, Alecksey Anuchin
This paper provides a high-accuracy assessment of domestic demand-side management (DSM) approach in the context of distributed renewable energy sources (RES). To determine the potential of domestic DSM for households, a microgrid model of a typical UK residential estate was developed to simulate the impact of RES. The microgrid model comprises 15 UK households with appropriate allocation of washing
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Optimization of overhead transmission lines insulation and grounding costs with respect to backflashover rate Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 P. M. De Oliveira-De Jesus, J. C. Amaya, A. L. Acevedo, A. J. Urdaneta U
In this paper, the optimization of transmission insulation and grounding is performed considering two backflashover rate (BFR) evaluation procedures widely applied in the industry. The optimization approach is based on the Lagrange formulation introduced by Hileman in late sixties. This method used the old AIEE procedure to evaluate the BFR of transmission lines. Since then a number of BFR evaluation
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Investigation on the thermal properties, space charge and charge trap characteristics of silicone rubber nano–micro composites Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Pabbati Vinod, Belaguppa Manjunath Ashwin Desai, R. Sarathi, Stefan Kornhuber
The micro-aluminium trihydrate (ATH) and nano-alumina fillers in the silicone rubber (SR) significantly improve the electrical, thermal and mechanical properties. ATH fillers improved the resistance to the corona ageing and water droplet-initiated erosion. Scanning electron microscopy (SEM) analysis was carried out to understand degradation condition caused due to corona ageing and damage caused due
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Ferromagnetic coil frequency response and dynamics modeling with fractional elements Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Marcin Sowa
The modeling of coils with ferromagnetic cores is considered. An attempt is made at the application of fractional derivatives because of the success in the modeling of real phenomena in various other fields. Three coils with ferromagnetic cores have been selected for the analysis. In order to obtain a basis for the study, measurements have been taken on a specially designed setup including an arbitrary
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Voltage Oriented Control and Direct Power Control Strategies in solving under and overvoltage conditions for heavy load application on Malaysian Distribution Representative Network Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Jun Yin Lee, Renuga Verayiah, Kam Hoe Ong, Agileswari Ramasamy, Marayati Bte Marsadek
This paper proposed two PWM control scheme which is the Voltage Oriented Control (VOC) and Direct Power Control (DPC) on a heavy loaded LV-distribution network with photovoltaic (PV) integration in Malaysia. The surge in demand of power supply is overcome by deploying more PV to fulfil the load demand. However, this could give rise to power quality issues that can affect the stability of the grid.
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Effect of permanent magnet material on the electromagnetic performance of switched-flux permanent magnet machine Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Chukwuemeka Chijioke Awah
The influence of permanent magnet materials on the electromagnetic performance of switched-flux permanent magnet (PM) machine having C-core stator assembly is investigated and compared. Both two-dimensional (2D) finite element analysis (FEA) and 3D-FEA are used in predicting the results. Presently, there has not been any study on the performance effect of using a wide range of different types of magnet
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Smart scheduling of transmission line switching: optimization of multi-objective microgrid’s day-ahead energy scheduling with considering high penetration of green energies and INVELOX Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Mohammad Shaterabadi, Mehdi Ahmadi Jirdehi
In recent years, distributed generation resources, especially renewable energies, have utilized in different situations; to solve the environmental pollution problems and lack of sufficient energies. In this regard, microgrid’s bi-objective energy scheduling and management are considered with INVELOX wind turbine, micro-turbine, boiler, CHP, photovoltaic, wind turbines, and also energy storage systems
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Voltage quality improvement in electrical distribution networks using dynamic voltage restorers: design, simulation and experimental tests of a robust controller Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Toufik Toumi, Ahmed Allali, Othmane Abdelkhalek, Josep M. Guerrero, Yacine Terriche, Mohamed Amine Soumeur
This paper presents a simulation and implementation of a proportional integral (PI) and adaptive neuro-fuzzy inference system (ANFIS) control scheme of single-phase dynamic voltage restorer (DVR) for the mitigation of load voltage sag, swell and harmonics. The objective of the control strategies is to regulate the voltage of the DVR via an injection transformer to compensate for the voltage required
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An improved controller for reactive power sharing in islanded microgrid Electr. Eng. (IF 1.18) Pub Date : 2021-01-10 Xuan Hoa Thi Pham
The control to stabilize the frequency and voltage is the main goal of controlling the islanded microgrid. The microgrid can include different inverters, which are connected in parallel to each other by lines that have different impedances. The loads in the microgrid include local and public loads. With the different line impedances and local loads, it has made the voltage and current controller-type
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Analysis and validation of mathematical morphology filters for single-ended fault localization in VSC-HVDC links Electr. Eng. (IF 1.18) Pub Date : 2021-01-07 Mani Ashouri, Filipe Faria da Silva, Claus Leth Bak
Fast and accurate fault detection and localization are important topics in voltage source converter-based high-voltage direct current transmission (VSC-HVDC) grids in order to isolate the fault after the first milliseconds of occurrence. Common signal processing methods used for detecting fault traveling wave (TW) peaks like Fourier transform, S-transform and wavelet-based techniques transform the
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A novel full compensation method for the ground fault current of resonant grounded systems Electr. Eng. (IF 1.18) Pub Date : 2021-01-07 Kun Yu, Zhanlei Liu, Xiangjun Zeng, Jiazheng Li, Lei Yang
The traditional arc suppression coil cannot compensate for the active and harmonic component of the ground fault current nor fully suppress the intermittent arc. For improvement, a novel full compensation method for the ground fault current of resonant grounded systems is proposed. The impedance of the compensation component is calculated based on the phase-to-ground insulation parameters, which are
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Robust tracking control for permanent magnet linear servo system using intelligent fractional-order backstepping control Electr. Eng. (IF 1.18) Pub Date : 2021-01-06 Tian-He Wang, Xi-Mei Zhao, Hong-Yan Jin
In this paper, an intelligent fractional-order backstepping control (IFOBC) method combining fractional-order backstepping control (FOBC) and Takagi–Sugeno–Kang-type fuzzy neural network (TSKFNN) applicable to the permanent magnet linear synchronous motor (PMLSM) is adopted to achieve high-performance servo control fields. First, the global regulation and position tracking of the system are realized
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Time-dependent variations in current harmonic emission by LED lamps in the low-voltage network Electr. Eng. (IF 1.18) Pub Date : 2021-01-05 Muhammad Naveed Iqbal, Lauri Kütt, Bilal Asad, Noman Shabbir, Iftikhar Rasheed
This paper presents the variation in current harmonics injected by the LED lamps and their effect on harmonic estimation in the low-voltage network. Lighting consumes a significant portion of total electricity consumption in residential, commercial and industrial sectors. The energy-efficient lights, for example, light-emitting diode lamps, are reducing this share significantly over the last few years
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An improved TPM-based distribution network state estimation considering loads/DERs correlations Electr. Eng. (IF 1.18) Pub Date : 2021-01-05 Bahman Abedi, Ali Asghar Ghadimi, Amir Hossein Abolmasoumi, Mohammad Reza Miveh, Francisco Jurado
This paper proposes an improved probabilistic load and distributed energy resources (DERs) modeling as pseudo-measurements by considering the correlation to be used for distribution network state estimation. The two-point method (TPM) is applied for the modeling of pseudo-measurements. The proposed method has the ability to estimate the states of a distribution network with high accuracy and short
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Capacitor voltage ripple reduction in MMC-HVDC system using flat bottom current method Electr. Eng. (IF 1.18) Pub Date : 2021-01-04 Kamran Hafeez, Shahid A. Khan, Alex Van Den Bossche, Qadeer Ul Hasan
Modular-multilevel converters (MMCs) are considered a useful technology in high-voltage direct current (hvdc) transmission systems. Since it offers many advantages like modular configuration with scalable output voltage. Voltage ripples on sub-module (SM) capacitors in MMC and circulating currents are two major challenges, which can affect the converter stability and performance. Conventionally, direct
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Speed sensorless fault-tolerant control of induction motor drives against current sensor fault Electr. Eng. (IF 1.18) Pub Date : 2021-01-04 Azizollah Gholipour, Mahmood Ghanbari, Esmaeil Alibeiki, Mohammad Jannati
Current sensors are needed in conventional field-oriented control (FOC) in 3-phase induction motor (3-PIM) drives. Nevertheless, these sensors are exposed to different faults which reduce the reliability of drive systems. To solve this problem, a current sensor fault-tolerant control (FTC) for 3-PIM drives without speed measurement is proposed in this paper. In the proposed scheme, a sensorless FOC
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Design and performance analysis of a novel mechanical flux-adjusting interior permanent magnet motor Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Xiping Liu, Yongling Zou, Tongze Sun
In this paper, a novel mechanical flux-adjusting interior permanent magnet (MFA-IPM) motor is proposed. The key is to employ an additional mechanical flux-adjusting (MFA) device attached to one side of the rotor, which can achieve flexible adjustment of the air-gap flux and obtain a wide speed range. This system with appropriate gears uses centrifugal force to set the cylindrical PMs in a required
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A novel switched capacitor-based multilevel inverter with symmetrical and asymmetrical configurations Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Chiranjeevi Sadanala, Swapnajit Pattnaik, Vinay Pratap Singh
In this paper, a novel single phase switched capacitor-based multilevel inverter topology is presented. The proposed topology is able to generate nine-level and 21-level output voltages for symmetric and asymmetric configuration of dc sources, respectively. The auxiliary H-bridge is not necessary to generate negative voltage levels, which reduces the voltage stress on the switches. The proposed switching
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Performance of wide-area power system stabilizers during major system upsets: investigation and proposal of solutions Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Mokhtar Benasla, Mouloud Denaï, Jun Liang, Tayeb Allaoui, Mostefa Brahami
Wide-area damping controllers (WADCs) are effective means of improving the damping of inter-area oscillations and thereby ensuring a secure operation of modern highly stressed interconnected power systems; however, their implementation costs are high. Therefore, the controller must be well configured and designed to ensure its cost-effectiveness. Several techniques have been proposed in the literature
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Determination of single-phase transformer saturation characteristic by using Nelder–Mead optimization method Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Amir Tokić, Mensur Kasumović, Marina Pejić, Viktor Milardić, Tahir Cetin Akinci
Correctly modelling the nonlinear saturation characteristics of the transformer iron core is of great importance in steady-state calculations (harmonics and power quality) and calculations of the electromagnetic transients (inrush current, ferroresonance, temporary overvoltages). Thus, this paper presents an original estimation algorithm for determining the transformer nonlinear saturation characteristic
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Implementation of SPV-powered water pumping system using non-isolated SC converter topology Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 K. Vamshi Krishna Varma, A. Ramkumar
Plentiful accessibility of fuels, non-erratic, reliable performance, low maintenance, low cost and high life are the significant factors for solar-PV-powered water pumping scheme for irrigation applications. It is highly used in irrigation system for cultivation where the utility-grid is non-available, hilly areas, forests, etc., by utilizing solar source with energy conversion methodology. However
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Improvement of the induction motor sensorless control based on the type-2 fuzzy logic Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Idriss Benlaloui, Larbi Chrifi-Alaoui, Mohammed Ouriagli, Abderrahmane Khemis, Dalila Khamari, Said Drid
This paper presents MRAS speed sensorless control of induction motor using type-2 fuzzy logic controller (T2FLC). These controllers replace the PI ones, in the new MRAS strategy proposed in Benlaloui et al. (IEEE Trans Energy Convers 30(2):588–595, 2015), in order to improve the induction motor performances and robustness at low speed region. Indeed, the choice of these controllers is made because
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Reducing LMP and resolving the congestion of the lines based on placement and optimal size of DG in the power network using the GA-GSF algorithm Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Masoud Dashtdar, Mojtaba Najafi, Mostafa Esmaeilbeig
One of the important factors in the discussion of power transmission is filling the capacity of network lines, which limits the transmission of power and increases the locational marginal price (LMP) in the network. Today, one of the techniques for resolving congestion and reducing LMP is to install DG units in the network, taking into account two factors: place and optimal size of DG based on operating
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Utilization of zirconia nanoparticles for improving the electrical and physical characteristics of HV porcelain insulating material Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 T. Eliyan, Osama A. Desouky, Eman Belal, M. A. Abd-Allah, S. M. El-Gamal
The effect of zirconium oxide nanoparticles (NZ) addition on the electrical and physical properties of porcelain insulators over high different sintering temperatures was investigated. Different amount of zirconia nanoparticles (0–8 wt%) was added to porcelain sample that obtained from local raw materials found in large quantities and excellent quality in the Sinai and Aswan (Egypt). Samples were produced
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Least square estimator and IEC-60891 procedure for parameters estimation of single-diode model of photovoltaic generator at standard test conditions (STC) Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Albert Ayang, René Wamkeue, Mohand Ouhrouche, Mohamad Saad, Tommy Andy Tameghe, Kodji Deli, Pierre Tchakoua Takoutsing
Like some previous works, it is shown that (I–V) curve analysis can be applied to photovoltaic (PV) modules and to PV plants. Generally, manufacturers give data at standard test conditions (STC); therefore, for performance analysis and diagnosis of PV modules it is useful to extrapolate data and parameters at STC according to the International Electrotechnical Commission (IEC)-60891 procedures. Review
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An improved particle swarm optimization using simplex-based deterministic approach for economic-emission power dispatch problem Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Namarta Chopra, Y. S. Brar, J. S. Dhillon
An improved particle swarm optimization integrated with a simplex search method (MPSO_SSM) is suggested as an efficient technique applied to economic-emission power dispatch (EEPD) problems. The particle swarm optimization (PSO) is a stochastic population search approach to locate a global solution in the exploration area that is refined by adding the local search using a simplex search method (SSM)
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Wide area power system transient stability prediction incorporating dynamic capability curve and generator bus coherency Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Anant Milan Khalkho, Dusmanta Kumar Mohanta
Any disturbance in the grid affects the real and reactive power outputs of the generators. The capability of producing real and reactive power is usually known as capability curve. The conventional static capability uses predefined operating constraints pertaining to mechanical power, rotor angle, terminal voltage, rated power factor and field voltage of the generator. However, the generators connected
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Increasing the transmission performance of a conventional 110 kV cable line by combining a hydronic concrete pavement system with photovoltaic floor tiles Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Dardan Klimenta, Miroljub Jevtić, Darius Andriukaitis, Vladica Mijailović
By combining the photovoltaic (PV) effect, heat exchanger principle, heat storage capability and phenomena of heat generation in PV cells and power cables, it is possible to increase significantly the transmission performance (i.e. the ampacity) of any 110 kV underground cable line. This can be achieved by installing power cables in a trench which is completely filled with high thermal conductivity
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Implementation of the ACO algorithm in an electrical vehicle system powered by five-level NPC inverter Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Waad Rtibi, Lotfi M’barki, Mohamed Yaich, Moez Ayadi
The ant colony optimization (ACO) algorithm is generally used to create an optimal PI regulator added to the pulse width modulation (PWM) strategy for a five-level neutral-point-clamped (NPC) inverter implemented in electric vehicle (EV). As heavy transportation is our main focus, the proposed system was formed by two induction motors (IMs); each of which was fed by one NPC inverter. The two IMs were
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Composite E-HVAC and CSC-HVDC system: control and its fault analysis Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Salman Salman, Ai Xin, Aamir Shahzad, Arsalan Masood, Sheeraz Iqbal
Efficient and economic power delivery through HVAC transmission system over long distance is a great challenge due to its physical and operational constraints. HVDC systems are preferable for long-distance transmission due to the technical and economic superiority over HVAC systems. This paper further efforts supporting long-distance power transmission using bipolar HVDC system based on current source
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A simple magnetic equivalent circuit model for switched reluctance machine Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Payam Vahedi, Babak Ganji
In the present paper, a simple model based on magnetic equivalent circuit (MEC) method is introduced for the switched reluctance machine to predict the phase flux linkage characteristic. All equations required to build up the model are given, and therefore, someone can use it easily for different types of the switched reluctance machines. Because of large speed of the suggested model, it can be utilized
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Multi-objective energy management of smart homes considering uncertainty in wind power forecasting Electr. Eng. (IF 1.18) Pub Date : 2021-01-03 Masoud Alilou, Behrouz Tousi, Hossein Shayeghi
Smart homes are one of the effective parts of a smart grid. A residential smart grid operates properly when each of smart homes is managed appropriately. The energy management system of a home has to simultaneously manage the operational time of appliances and how to use the energy of an electric vehicle and home renewable distributed generation units like a wind turbine. So, the energy management
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Cascaded HVDC gaseous circuit breaker performance using black box arc model Electr. Eng. (IF 1.18) Pub Date : 2021-01-02 Osama E. Gouda, Ghada Amer, Mohamed Awaad, Manar Ahmed
The development of renewable sources of electrical energy represents the main goal of the most countries. This energy has to be transmitted for a long distance for the utilization in populated areas. The need of high-voltage direct current circuit breakers represents the key of the development of high-voltage direct current transmission systems. High and extra high-voltage six sulfur hexafluoride circuit
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A new meta-heuristic programming for multi-objective optimal power flow Electr. Eng. (IF 1.18) Pub Date : 2021-01-02 Fatima Daqaq, Mohammed Ouassaid, Rachid Ellaia
In this paper, a new multi-objective approach is suggested, known as multi-objective backtracking search algorithm (MOBSA) in order to formulate and solve the optimal power flow (OPF) problem in power systems. Many objective functions are considered like fuel cost, power losses, and voltage deviation. The structure of the proposed method is simple and has one control parameter. In addition, MOBSA is
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Curvature scale space-based signatures for electrical load classification in NILM Electr. Eng. (IF 1.18) Pub Date : 2021-01-02 Rodrigo de Paula Rodrigues, Paulo Márcio da Silveira
Non-intrusive load monitoring (NILM) systems have gained extensive interest due to their potential role regarding power savings for residential customers. These systems, which are mostly based on stages of detection and classification of transients on aggregated signals, rely heavily on load signatures. In the literature, the image-based voltage–current (V–I) trajectory representation is claimed as
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Photo-voltaic power intra-day and daily statistical predictions using sum models composed from L-transformed PDE components in nodes of step by step developed polynomial neural networks Electr. Eng. (IF 1.18) Pub Date : 2020-12-21 Ladislav Zjavka
Precise forecasts of photo-voltaic (PV) energy production are necessary for its planning, utilization and integration into the electrical grid. Intra-day or daily statistical models, using only the latest weather observations and power data measurements, can predict PV power for a plant-specific location and condition on time. Numerical weather prediction (NWP) systems are run every 6 h to produce
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Modeling and stability analysis of three- and six-phase asymmetrical grid-connected induction generator Electr. Eng. (IF 1.18) Pub Date : 2020-12-17 Arif Iqbal, Girish Kumar Singh
This paper presents the development of linearized model of asymmetrical six-phase grid-connected induction generator (GCIG) for small-signal stability. The developed linearized model has been used to obtain the eigenvalue to evaluate generator stability with respect to parameter variation of the machine in comparison with its three-phase counterpart. During the analysis, suitability of six-phase induction
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Calculation of the overhead transmission line conductor temperature in real operating conditions Electr. Eng. (IF 1.18) Pub Date : 2020-09-30 Ľubomír Beňa, Vladimír Gáll, Martin Kanálik, Michal Kolcun, Anastázia Margitová, Alexander Mészáros, Jakub Urbanský
The integration of fluctuating renewable sources, load growth and aging of the current power system is the major reasons for the development of the electric power engineering. Transmission lines are recently facing new technical and economic challenges. The immediate utilization of advanced technologies and modern methods could solve these issues. This study deals with the transmission and distribution
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Parameter design of governor power system stabilizer to suppress ultra-low-frequency oscillations based on phase compensation Electr. Eng. (IF 1.18) Pub Date : 2020-09-24 Xin Zhou, Muhammad Usman, Peng He, Muhammad Shahid Mastoi, Shaobo Liu
In a few of the isolated DC power-transmission systems with hydropower units (and the associated water hammer effect), inappropriate governor control parameters may weaken the system damping and stability. It has the potential to result in ultra-low-frequency oscillations (ULFO) which is below 0.1 Hz. To carry out this issue, a linearized state-space model of a multi-machine system that includes hydropower
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Strategy and implementation of controlled reclosing: harmless reclosing Electr. Eng. (IF 1.18) Pub Date : 2020-09-23 Zhihui Huang, Kai Wang, Yongxing Wang, Lin Zou, Jiyan Zou
This paper describes a new technique named controlled reclosing in which the peak value and duration time of reclosing current can be controlled to reduce the enormous pressure to power system when reclosing in permanent fault. Based on the analysis to the reclosing current in different voltage phase angles and a fast estimation algorithm for current parameters, a new reclosing strategy named controlled
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An efficient model predictive control based on Lyapunov function for doubly fed induction generator fed by a T-type inverter Electr. Eng. (IF 1.18) Pub Date : 2020-09-22 Tien A. Nguyen, Hoang Tung Nguyen, Gia Anh Vu Phan, V. Pham, Van On Vo, Phuc Thinh Doan, Viet-Tuan Pham, Kim Anh Nguyen, Pedro Rodriguez-Ayerbe, Van-Quang-Binh Ngo
This paper proposed an efficient model predictive control strategy for a three-level T-type inverter connected to a doubly fed induction generator. A dynamic model is utilized to track the power reference, preserve the DC-link voltage balancing and reduce the inverter switching frequency and common-mode voltage. Unlike the traditional finite control set model predictive control, the stability of the
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Two VHDL-AMS-based models of multi-conductor power cables for EMI simulations Electr. Eng. (IF 1.18) Pub Date : 2020-09-19 Ali Krim, Adberrazak Lakrim, Driss Tahri
Due to the fast switching of the commutation cell in a motor drive system, high-frequency electromagnetic disturbances propagate through cables to reach the loads. Mismatched impedances lead to an overvoltage at the loads terminals. In order to study this EMI issue, accurate circuit models of power cables are required. In this context, this paper proposes two multi-conductor cable models. Our approach
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Optimal distributed generation allocation in unbalanced radial distribution networks via empirical discrete metaheuristic and steepest descent method Electr. Eng. (IF 1.18) Pub Date : 2020-09-18 Francisco Carlos Rodrigues Coelho, Ivo Chaves da Silva Junior, Bruno Henriques Dias, Wesley Peres, Vitor Hugo Ferreira, André Luiz Marques Marcato
Loss minimization and voltage improvement through distributed generation (DG) planning is a well-established problem. However, a careful review of the literature shows that there is still room for the development of efficient algorithms for this purpose. In special, hybridization between optimization techniques is suitable for this complex problem, as it allows taking advantage of the positive features
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Determination of electric motor losses and critical temperatures through an inverse approach Electr. Eng. (IF 1.18) Pub Date : 2020-09-16 Amal Zeaiter, Etienne Videcoq, Matthieu Fénot
In this study, a practical numerical method is proposed to estimate losses of high specific power density electric motors, using few simulated temperature data. In such electric motors, these losses generate high heat fluxes inside the motor components that can be critically sensitive to temperature. Electromagnetic and mechanical friction phenomena are behind the occurring of these thermal dissipations
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Non-intrusive load monitoring using multi-label classification methods Electr. Eng. (IF 1.18) Pub Date : 2020-09-15 Ding Li, Scott Dick
Non-intrusive load monitoring is a technique to help power companies monitor and analyze residential energy usage. Aggregated power load measurements for a household (i.e., the signal on the main powerline) are disaggregated into individual appliance loads by examining the appliance-specific power consumption characteristics. These data can then be used to modify consumer behaviors via detailed billing
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A frequency adaptive control scheme for a three-phase shunt active power filter Electr. Eng. (IF 1.18) Pub Date : 2020-09-12 Saad F. Al-Gahtani, R. M. Nelms
The propagation of nonlinear loads and distributed power generation systems can cause power quality problems such as harmonic distortion, system imbalance, and resonance problems. Shunt active power filters are used to eliminate these power quality problems. A recently proposed control scheme for a shunt active power filter utilized a time-domain transformation to extract positive and negative sequence
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Conception and control of a new hybrid four-level inverter associated with a multi-source system Electr. Eng. (IF 1.18) Pub Date : 2020-09-11 Sabri Mansouri, Slim Tnani, Olivier Bachelier
In the recent years, the introduction of an alternative energy such as clean energy has become a major challenge. In this context, several sources of energy are often associated to provide the required energy to the grid. However, output of photovoltaic system and wind turbine is influenced by meteorological conditions. As a result, the power quality exchanged between those sources and the grid might
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Developing the coyote optimization algorithm for extracting parameters of proton-exchange membrane fuel cell models Electr. Eng. (IF 1.18) Pub Date : 2020-09-11 Hamdy M. Sultan, Ahmed S. Menesy, Salah Kamel, Francisco Jurado
Developing a precise semiempirical mathematical model based on multi-nonlinear equations for the proton-exchange membrane fuel cell (PEMFC), which guarantees suitable and accurate simulation of the electrical characteristics of typical PEMFC stacks under various operating scenarios, is the main target of this study. The unknown parameters of the PEMFC model are extracted using a novel efficient optimization
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A novel algorithm for increased power balance in cascaded H-bridge multilevel cells in a hybrid power amplifier Electr. Eng. (IF 1.18) Pub Date : 2020-09-10 Luccas M. Kunzler, Luiz A. C. Lopes
This paper concerns the issue of unbalanced output power among cells in cascaded H-bridge multilevel (CHBM) converters with conventional staircase modulation techniques under low modulation signals. This is a common condition in high-voltage/frequency hybrid power amplifiers (HPAs) consisting of a CHBM converter in series with a linear power amplifier (LPA). The online implementation of a modulation
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An intelligent recognition system for insulator string defects based on dimension correction and optimized faster R-CNN Electr. Eng. (IF 1.18) Pub Date : 2020-09-09 Tao Lin, Xiaowei Liu
In this paper, an intelligent recognition system for insulator based on dimension correction and optimized faster region with convolutional neural network (R-CNN) is proposed. In the process of insulator pictures shooting, a laser radar is used to calculate the UAV correction vector. The position of the UAV is adjusted to ensure the consistency of the spatial dimensions of the pictures taken in different
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A proposal for analysis of operating reserve requirements considering renewable sources on supergrids Electr. Eng. (IF 1.18) Pub Date : 2020-09-05 Sérgio P. dos Santos, Ronaldo R. B. de Aquino, Otoni Nobrega Neto
Hydroelectric and thermal generation provides a safe and regular operation in front of load shape. However, changes in the expansion policy that includes wind and solar power plants modify the path of transmission power flow and load response requirements. In order to accommodate these new renewable sources, long-term systemic approach is complex and should be based on hydrothermal optimization and
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Analysis of stator and rotor currents and torque of induction machine with rotor-bar faults Electr. Eng. (IF 1.18) Pub Date : 2020-09-04 L. Schreier, J. Bendl, M. Chomat
The paper analyzes a case of the induction motor in which one or more rotor bars in the rotor cage are broken. The method of space vectors and symmetrical components of instantaneous values of currents and voltages is used in the analysis. The solution obtained makes it possible to determine the currents in each of the healthy rotor bars, the stator currents, and the electromagnetic torque of the machine
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