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  Subjects -> ELECTRONICS (Total: 207 journals)
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International Journal of Power Electronics
Journal Prestige (SJR): 0.233
Citation Impact (citeScore): 1
Number of Followers: 24  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1756-638X - ISSN (Online) 1756-6398
Published by Inderscience Publishers Homepage  [451 journals]
  • Development and implementation of a voltage harmonic elimination method
           for the single-phase inverter operating with nonlinear load

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      Authors: Bogdan Proca, Mihai Comanescu
      Pages: 263 - 282
      Abstract: Single-phase inverters are widely used in power conversion systems. When operating with linear loads, these inverters produce regulated quasi-sinusoidal output voltages. When feeding nonlinear loads, they absorb non-sinusoidal (distorted) currents and the inverter's output voltage deteriorates - it contains high levels of harmonics. This paper presents a method to reduce the harmonics in the output voltage. The control strategy is based on selective harmonic elimination - the method eliminates some of the low order harmonics of the output voltage. The method uses stationary reference frame voltage and current controllers. The voltage controller regulates the fundamental and eliminates certain harmonics using a modulation-demodulation technique. In the paper, the 3rd, 5th and 7th harmonics are eliminated. However, the scheme can be expanded to eliminate more higher-order harmonics. It is shown that the control proposed, significantly reduces the total harmonic distortion of the inverter's output voltage, from 5.8% to 1.64% (at full load).
      Keywords: single-phase inverter; total harmonic distortion; THD; harmonic elimination; sliding mode current control
      Citation: International Journal of Power Electronics, Vol. 16, No. 3 (2022) pp. 263 - 282
      PubDate: 2022-09-18T23:20:50-05:00
      DOI: 10.1504/IJPELEC.2022.125642
      Issue No: Vol. 16, No. 3 (2022)
       
  • Comparative analysis of unit template, SRF and the modified SRF technique
           for DSTATCOM-based distribution system

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      Authors: Aaqib Ahmad Qureshi, Abdul Hamid Bhat
      Pages: 283 - 314
      Abstract: This paper introduces a new hybrid control strategy called the modified synchronous reference frame theory (modified SRF theory) for power quality improvement of a DSTATCOM-based distribution system. This control strategy makes use of both synchronous reference frame (SRF) as well as unit template technique to generate the reference supply currents which are then compared with the sensed supply currents and fed to the hysteresis/PWM current controller to generate the necessary switching signals for switches of the voltage source converter (VSC) of the DSTATCOM for a three-phase, three-wire system. The proposed algorithm eliminates the need of a complex reverse Park's transformation and results in the most efficient harmonic diminution confirming to IEEE-519 standard. The proposed control algorithm is compared with the unit template-based algorithm and the SRF theory to mitigate a variety of problems such as low power factor, voltage regulation, current unbalance and harmonics in the system. The proposed algorithm is proved efficient and reliable when compared with conventional algorithms reported in the literature.
      Keywords: DSTATCOM; control technique; power quality; unit template; synchronous reference frame; SRF; modified SRF; custom power device
      Citation: International Journal of Power Electronics, Vol. 16, No. 3 (2022) pp. 283 - 314
      PubDate: 2022-09-18T23:20:50-05:00
      DOI: 10.1504/IJPELEC.2022.125627
      Issue No: Vol. 16, No. 3 (2022)
       
  • An improved grid integration technique for SPV-based CHB-MLI in
           distribution network

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      Authors: Prabir Ranjan Kasari, Subhadeep Bhattacharjee
      Pages: 315 - 344
      Abstract: The growing power electronics-based nonlinear load increases harmonic contribution in the power system leads to deterioration in the quality of power. The unbalance loading in three phase four wire (3P4W) system allows a neutral current flow, which is an escalating concern for the utility. In this paper, the instantaneous power balance method is employed for solar photovoltaic (SPV)-based nine-level cascaded H-bridge multilevel inverter (CHB-MLI). A modified instantaneous power balance method (PBT) is proposed for integrating SPV-based CHB-MLI with the arrangement specified here as solar photovoltaic shunt active power filter (SPV-SAPF). The zero sequence components have a significant effect on an unbalance 3P4W system, considered as a utility in this paper. FFT analysis done for different voltage levels of CHB-MLI shows that total harmonic distortion (THD) is within a permissible limit. Besides, simulation, experimental results are also provided to validate the performance of the proposed scheme.
      Keywords: active and reactive power; cascaded H-bridge multilevel inverter; CHB-MLI; harmonics compensation; instantaneous power balance theory
      Citation: International Journal of Power Electronics, Vol. 16, No. 3 (2022) pp. 315 - 344
      PubDate: 2022-09-18T23:20:50-05:00
      DOI: 10.1504/IJPELEC.2022.125629
      Issue No: Vol. 16, No. 3 (2022)
       
  • Versatile current controller suitable for two-level as well as three-level
           converters of shunt active power filters: part 1

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      Authors: Siddharthsingh K. Chauhan, P.N. Tekwani
      Pages: 345 - 370
      Abstract: Current control strategy dominates shunt active power filter (SAPF) performance. Versatile current error space phasor (CESP)-based hysteresis controller (HC) for SAPF is presented. Controller keeps CESP within hexagon shaped boundary by selecting appropriate SAPF voltage vector. Optimal voltage vector switching is ensured unlike non-optimum selection in conventional HC based SAPFs. Proposed SAPF generates compensating currents by coordinating sector changeovers and supply frequency. Two different sector change detection schemes are presented. The concept is simulated and implemented using digital signal processor (DSP) TMS320LF2407A. Experimental results depicting steady-state and transient performance are presented. Effect of hysteresis band variation on SAPF performance is also reported. Adequate compensation by SAPF is evident from presented results. However, complex voltage space phasor structure of multi-level converter (MLC) limits proposed controller's sector change detection ability. For application of proposed controller to MLC-based SAPF a versatile controller using outer hysteresis band is described in part-2 of this paper.
      Keywords: current error space phasor; hexagonal boundary; multi-level converter; sector change detection; shunt active power filters; SAPFs; versatile hysteresis current controller; HCC
      Citation: International Journal of Power Electronics, Vol. 16, No. 3 (2022) pp. 345 - 370
      PubDate: 2022-09-18T23:20:50-05:00
      DOI: 10.1504/IJPELEC.2022.125633
      Issue No: Vol. 16, No. 3 (2022)
       
  • Model reference adaptive system-based precise online inertia
           identification of induction motor with error utilisation technique

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      Authors: Jay D. Mistry, P.N. Tekwani, Chirag H. Raval, Vinod Patel
      Pages: 371 - 384
      Abstract: Time varying parameters can be estimated using either adaptive control or robust control. Robust control can be used only when the control law is fixed and varying parameters are bounded. Adaptive control is concerned with control law changing itself. Model reference adaptive system (MRAS) is an adaptive control method that can be used to identify initially unknown parameters. Variation in load and machine vibrations affect the control system performance of any motor drive system when it is in operating condition. Estimation of moment of inertia becomes essential to improve the dynamic response characteristics of any high-performance asynchronous machine (ASM) drive system. A novel method using model reference adaptive system (MRAS) with error utilisation technique (EUT) for precise identification of online varying inertia is presented in this article. The proposed method uses an interesting relation between the estimation error and actual inertia, to compensate for the error and provide high precision online inertia identification.
      Keywords: asynchronous machine; ASM; model reference adaptive system; MRAS; error utilisation technique; EUT; inertia identification
      Citation: International Journal of Power Electronics, Vol. 16, No. 3 (2022) pp. 371 - 384
      PubDate: 2022-09-18T23:20:50-05:00
      DOI: 10.1504/IJPELEC.2022.125635
      Issue No: Vol. 16, No. 3 (2022)
       
  • BSA-based analysis of three-phase standalone asynchronous generator using
           two-port network

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      Authors: Sambaran Ray, Himadri Sekhar Chatterjee, Dipanjan Samajpati, Sankar Narayan Mahato, Nirmal Kumar Roy
      Pages: 385 - 398
      Abstract: This paper presents the analysis of steady-state behaviour of a three-phase standalone asynchronous generator (SAG) supplying three-phase load based on binary search algorithm (BSA). The concept of two-port network is used to model the generator system along with the load. Two model equations developed from the modelling of SAG are solved by BSA to get the frequency (<i>a</i>) and magnetising reactance (<i>X<SUB align="right">m</i>). The performance equations are formed with the help of frequency, magnetising reactance and magnetising characteristics of the machine to understand the steady-state behaviour of SAG. The waveforms of generated voltages and currents in the generator are also investigated and their corresponding harmonic contents are recorded. The simulated results are verified through the experimentation, and it shows that the experimental results closely agree with the simulated results. The BSA-based analysis of three-phase SAG is easier, more efficient and accurate.
      Keywords: self-excited induction generator; SEIG; binary search algorithm; BSA; standalone asynchronous generator; SAG; steady-state performance; waveform; two-port network
      Citation: International Journal of Power Electronics, Vol. 16, No. 3 (2022) pp. 385 - 398
      PubDate: 2022-09-18T23:20:50-05:00
      DOI: 10.1504/IJPELEC.2022.125643
      Issue No: Vol. 16, No. 3 (2022)
       
 
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