Forthcoming and Online First Articles

International Journal of Power Electronics

International Journal of Power Electronics (IJPElec)

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International Journal of Power Electronics (11 papers in press)

Regular Issues

  • Power oscillations cancellation strategy control of DFIG wind turbine during grid voltage dip   Order a copy of this article
    by Hakima Bahlouli, Mansouri Abdellah, Mohamed Bouhamida, Ali Eltamaly, Larbi Djillali 
    Abstract: Wind energy conversion systems (WECSs) based on doubly fed induction generators (DFIGs) are considered prominent technologies in wind energy systems. However, complying with grid code requirements necessitates maintaining wind turbine connectivity during network voltage dips. As the stator of the DFIG is directly linked to the grid, the generator stability is mostly affected by grid voltage dips. This paper proposes a direct power control strategy based on a reference generation approach to enhance the transient behaviour of DFIG during grid voltage dips and the subsequent recovery period. By eliminating the reliance on sequential decomposition methods and reducing the need for crowbar protection, the proposed control method achieves improved performance. The control method employs a sliding mode control strategy to expedite convergence time, while the control parameters are tuned using a fuzzy logic strategy to facilitate adaptation to external disturbances. Results demonstrate that the proposed strategy reduces rotor overcurrent, ensures a stable reactive power supply during voltage dips, and preserves the grid connection of the wind turbine.
    Keywords: second order sliding mode; LVRT capability; robust control; symmetrical dip; doubly fed induction generator; DFIG.
    DOI: 10.1504/IJPELEC.2024.10059706
     
  • Decoupled Power Flow Management in TAB-IBDC Converter for HESS Application in EV System   Order a copy of this article
    by PRATHAMESH JADHAV, B.B. Pimple 
    Abstract: In this paper, the application of triple-active-bridge (TAB)- isolated bidirectional DC-DC (IBDC) converter for hybrid energy storage system (HESS) in electric vehicle (EV) is considered. The power flow analysis of proposed converter configuration involves coupling of power flow between dc ports. The design procedure involves decoupled power flow management which provides accessibility for independent port power sharing. Simultaneously, it enhances the degree of freedom of control. The objective of this paper is to apply a power decoupling method by which peak power feed by ultra-capacitor of HESS should not affect the continuous steady battery current flow. The proposed method is verified through simulation study as well as experimental study.
    Keywords: TAB-IBDC converter; Triple active bridge; Isolated DC to DC converter; Dual active bridge (DAB); Quad active bridge (QAB); Multi-active bridge converter (MAB); phase-shift modulation.
    DOI: 10.1504/IJPELEC.2024.10060294
     
  • An improved efficiency novel five switch 1Ø grid-tied non-isolated inverter topology   Order a copy of this article
    by Rushikesh Shahakar, Kawita Thakur, Nutan Thakare 
    Abstract: In lieu of rapidly decreasing fossil fuels and also to tackle the upcoming energy crisis, the challenge lies in developing technology that can spur the use of renewable energy sources. This research evaluates a high-reliability and improved efficiency 1Ø transformerless grid-tied inverter topology with superjunction MOSFETs for photovoltaic modules. There is not any requirement for dead time at the grid zero crossing which enhances the output AC current and boosts converter efficiency. This improves system reliability by avoiding the shoot-through hazard. The proposed inverter uses segmented inductor topologys ability to prevent issues with reverse recovery loss for the power switches which in turn giving the converter system a high California Energy Commission or European Union efficiency. The mathematical analysis for proposed topology was validated using simulation studies in the MATLAB/Simulink framework. Also, losses and efficiencies were estimated.
    Keywords: photovoltaic; non-isolated; efficiency; power loss.
    DOI: 10.1504/IJPELEC.2024.10062636
     
  • Stability analysis of selective inter-harmonic compensation approach for light flicker mitigation   Order a copy of this article
    by Archana Sharma, Anshul Kumar Mishra, Bharat Singh Rajpurohit 
    Abstract: In this paper, stability analysis of an approach for Light Flicker (LF) mitigation is proposed. Electric Arc Furnace (EAF) is one of the major sources of injecting inter-harmonics and contributing LF. Mathematical analysis of EAF current is done to determine the frequency components majorly responsible for LF. Based on the outcomes conventional control algorithm of Static Synchronous Compensator (STATCOM) is modified to mitigate the inter-harmonics between frequency range 30Hz-70Hz, which gives advantage of capacity and capital savings. Although the proposed system reduces the flicker level Pst below 1 but it increases the system's order. In this work, stability analysis of proposed system with STATCOM is done to authenticate its practical implementation. Impedance-based small-signal modelling of the system is used to analyse the effect of current loop and voltage loop individually and together. The performance of system reveals that the proposed system is stable and can be used in practical applications.
    Keywords: electric arc furnace; EAF; inter-harmonics; light flicker; LF; power quality; PQ; static synchronous compensator; STATCOM.
    DOI: 10.1504/IJPELEC.2024.10063142
     
  • Walrus optimization algorithm based bidirectional long short term memory for DC microgrid protection   Order a copy of this article
    by Ramaprasanna Dalai, Sarat Chandra Swain 
    Abstract: Protection for direct current microgrids (MG) is critical, especially when they are subjected to renewable resources. When treated to several distributed generators, the MG experiences various renewable generator events, as previously reported by researchers. However, the MG also suffers due to the problem with load, cables and converters used in distributed systems. The existing deep learning algorithms failed to detect different faults with high accuracy; thus, the protection mechanism used violates safe operation. Hence, to detect and identify various events on MG with high accuracy, a fault detection and identification system concerning the deep learning algorithm is adopted. The voltage and current signal from the system is observed and used for detection using bidirectional long short-term memory (BLSTM). For enhanced accuracy and ease in detection performance, the voltage and current signal are processed by using Hilbert hung transform; based on the decomposed features, the BLSTM accurately identifies the faults in the system. As a result, the proposed model yielded improved performance with 98.71% precision, 99.89% F1-score, 99.93% recall and 99.99% accuracy under 17.36 ms of detection time.
    Keywords: microgrid; shunt arc fault; ShAF; series arc fault; SAF; line to line fault; LLF; pole to pole fault; PPF; Hilbert-Huang transform; HHT; fault detection; FD.
    DOI: 10.1504/IJPELEC.2024.10063212
     
  • Performance assessment of a new reduced component multilevel inverter with discrete modulation techniques   Order a copy of this article
    by Krishna Kumari Karri, Varsha Singh, Swapnajit Pattnaik 
    Abstract: Multilevel inverter (MLI) has been widely used in industrial applications over the last few decades, however economical MLI design with compatible pulse width modulation needs attention. This paper proposes a new MLI with three sources and eight switches, producing seven and a maximum of 11 levels with symmetrical and asymmetrical DC sources. Novel topology features are lesser component count, fewer DC-link switches, lower total standing voltage, and cost function. A comparative analysis of the proposed configuration with existing topologies is presented for single and cascaded connections of multiple modules. Further, discrete modulation approaches are used to investigate the influence of modulation index variation on the proposed inverter's output voltage, total harmonics distortion, power, and efficiency while considering static and dynamic load changes. The performance of MLI with optimised staircase modulation using PSO technique surpasses high-frequency multi-carrier level shift modulation methods. Extensive simulation tests are carried out in MATLAB and validated with experimental results.
    Keywords: multilevel inverter; MLI; optimised staircase modulation; total harmonic distortion; THD; total standing voltage; TSV; cost function; efficiency.
    DOI: 10.1504/IJPELEC.2024.10059146
     
  • Delay-based droop control in DC-DC converters: a novel technique to overcome the DC microgrid stability problems with constant power loads   Order a copy of this article
    by P. Balakumar, T. Vinopraba, Geetha Chandrasekaran, S. Sankar 
    Abstract: With the development of distributed renewable energy sources (DREs), DC microgrids are gaining popularity because of their high efficiency, reliability, and ease of connecting DREs. The negative incremental impedance caused by connecting multiple constant power loads (CPLs) at the DC microgrid generates voltage oscillations. To eliminate the effect of CPLs, a technique is proposed to suppress the oscillations created by the disturbance in the DC bus. In this paper, a delay-based control technique has been developed at the source side controller. The proposed approach is integrated with the existing maximum power point tracking (MPPT) algorithm with a droop controller to suppress the oscillations at the DC bus. This approach enhances the power quality of the multiple CPLs connected in the DC microgrid.
    Keywords: constant power loads; distributed renewable energy sources; DC microgrid; MPPT with droop control; modelling of cascaded converter.
    DOI: 10.1504/IJPELEC.2024.10059144
     
  • Red deer optimisation based asymmetrical reduced switch MLI with low switching loss and minimum voltage harmonics   Order a copy of this article
    by Rupali Mohanty, Debashis Chatterjee, Swati Suman 
    Abstract: In this research, an improved reduced multilevel inverter (MLI) design with a single active voltage source and the lowest possible power switches is proposed. Asymmetrical voltage sources power this reduced MLI using series capacitors connected to a single photo voltaic (PV) module. Due to the use of a minimal number of switching devices and input voltage sources, this MLI design also can be appropriate for integrating PV sources with low voltage grids. The constraints of the cascade H-bridge MLI and traditional two-level inverter have been overcome by the offered approach due to low switching loss and minimum switching stress. The variable capacitance ratio with respect to a reference value and the required switching pulses is calculated using a new metaheuristic technique called red deer optimisation (RDO) algorithm. The total harmonics distortion (THD) of the MLI output voltage has been reduced by this technique to 3.52%. To demonstrate the usefulness of the RDO method, its performance was compared to that of particle swarm optimisation (PSO) and Grey Wolf optimisation (GWO). In addition to simulation and experiment, the usefulness and productivity of this reduced MLI have been supported by these results.
    Keywords: reduced H-bridge multilevel inverter; ML; red deer optimisation algorithm; RDO; total harmonics distortion; THD; asymmetrical voltage supply; modulation index; voltage grading.
    DOI: 10.1504/IJPELEC.2024.10056817
     
  • A new switching method for multi-level asymmetric CHB to reduce THD and torque ripple in IM drive   Order a copy of this article
    by Ladan Abootorabi, M.R. HasanZadeh Aghdam, Hossein Torkaman 
    Abstract: This paper presents a new switching method for a multi-level asymmetrical cascaded H-bridge inverter that feeds an induction motor (IM). This strategy aims to reduce the total harmonic distortion (THD), torque ripple, and stress on switches. In this inverter, there are three H-bridges in each phase, whose voltage sources are unequal, so the number of levels reaches 27. The H-bridges modules with different voltage sources are switched separately by considering the reference voltage obtained from the control method. In this technique, the motor supplies load from low operating frequencies to the nominal value with the minimum torque ripple and currents' THD in all load conditions. Moreover, this technique has essential advantages including more simplified implementation, less switching losses, longer equipment lifetime as the result of a minimised voltage stress, higher voltage levels achievement, and independent operation of each H-bridge. Finally, different performance indices of this method as compared to the other ones go to show the high efficiency and applicability of the proposed technique.
    Keywords: multilevel inverter; induction motor drive; reduction THD; improve torque ripple.
    DOI: 10.1504/IJPELEC.2024.10057356
     
  • Design, simulation and analysis of solar electric vehicle charging station   Order a copy of this article
    by Abdeali A. Challawala, Manisha T. Shah 
    Abstract: Integration of a photovoltaic (PV) system into an electric vehicle charging infrastructure is an effective solution for reducing carbon footprint. The proposed charging station is equipped with a solar system to charge three distinct types of EV batteries. Modified incremental conduction algorithm is implemented to extract maximum power from the PV panel. If the generation from PV is more than excessive power, it can be sent back to the grid. This increases the grid's stability during high load demand. In this paper, power balancing between the solar PV system, grid, and battery chargers has been achieved during the different charging conditions. Due to the insertion of many power electronics converters, the grid current is distorted and offers a low power factor. In the proposed work overall control technique is developed to maintain an almost unity power factor and total harmonic distortion is under the limit given by IEEE Standard 519-2014.
    Keywords: constant current constant voltage; CCCV method; electric vehicle; grid tied inverter; maximum power point tracking; MPPT; power balancing; renewable energy.
    DOI: 10.1504/IJPELEC.2024.10059246
     
  • A reliable DC-DC converter topology for vehicle applications   Order a copy of this article
    by Kirti Mathuria, Harpal Tiwari 
    Abstract: In this work, an efficient bridge DC-DC converter is described for vehicular applications. By utilising the auxiliary circuit of the bridge DC-DC converter, zero voltage switching (ZVS) for active switches can be achieved. A modified pulse width modulation (MPWM) is used for switching. The proposed work is compared with the conventionally used PWM technique. The auxiliary and the inductance values of the bridge DC converter are reduced. The detailed simulation and test results described the converter's functional aspects. A hardware setup of 540 W at 80 kHz has been described to verify the simulation result. A DSP controller board (TMS320F28379D) is used to generate the real-time gating signals.
    Keywords: DC-DC converter; soft switching; electric vehicle; EV; zero voltage switching; ZVS; modified pulse width modulation; MPWM.
    DOI: 10.1504/IJPELEC.2024.10062012