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 | IET Power Electronics Volume 16, Issue 14 Pages: 2287-2448 4 November 2023 |
ORIGINAL RESEARCH
Open AccessAn improved passivity‐based control for suppressing the traction motor torque ripples due to traction network voltage fluctuation in high‐speed railways
Pages: 2287-2300 | First Published: 09 July 2023
Interharmonics on the grid-side of the traction power supply system can propagate through the electric traction drive system to the mechanical transmission system, causing torque ripples and vibrations of key train components. An improved passivity-based control is designed for the inverter-motor system of the high-speed train in this paper to suppress the torque ripples and vibrations caused by the interharmonics.
Open AccessActive power filter with enhanced echo state network in radar power supply system
Pages: 2301-2310 | First Published: 04 July 2023
This paper designs a hybrid optimization shunt active power filter, which adopts enhanced echo state network to predict harmonics and reduce the delay problem in traditional control.
Open AccessA mutually decoupled coil system to improve sensitivity of inductively coupled communication
Pages: 2311-2319 | First Published: 07 July 2023
This paper proposes a mutually decoupled transmission and receiver coil (MDC) system to improve the sensitivity of inductively coupled communication. The proposed communication system is intended to be mounted on the frame of a spectacle and used to communicate through weak inductive coupling with an implant measuring intraocular pressure (IOP).
Open AccessThird harmonic injection control for co‐phase traction power supply system using direct AC/AC full‐bridge modular multilevel converter
Pages: 2320-2335 | First Published: 13 July 2023
A general voltage balancing control based on third harmonic injection for direct AC/AC full-bridge modular multilevel converter (FB-MMC) is proposed and the optimized range of voltage ratio and phase difference are investigated to minimize arm currents increment.
Open AccessBroyden's method assisted differential evolution (BMADE) based selective harmonic elimination in a cascaded H‐bridge multilevel inverter
Pages: 2336-2355 | First Published: 01 August 2023
This paper implements Broyden's Method Assisted Differential Evolution algorithm for eliminating third and fifth harmonics in the output voltage of 7-level cascaded H-Bridge multilevel inverter (CHB-MLI) using selective harmonic elimination technique. Calculations of switching angles are done for various modulation index values (M). Initial guess for Broyden's method is calculated by Differential Evolution (DE). Exact value of switching angles is then calculated by Broyden's method using initial guess obtained from DE.
Open AccessAnalytical models of the crosstalk voltage in SiC MOSFETs under different loads
Pages: 2356-2368 | First Published: 16 July 2023
This paper established analytical models of the crosstalk voltage of SiC MOSFETs under resistive load and inductive load. Moreover, this paper analyzed the mechanism, process and influencing factors of crosstalk issue under different loads through the established analytical models. The results were verified by experiments and will provide guidance for the design of gate circuit parameters to regulate the crosstalk issue of SiC MOSFETs under different loads.
Open AccessA novel 4H‐SiC accumulation mode MOSFET with ultra‐low specific on‐resistance and improved reverse recovery capability
Pages: 2369-2377 | First Published: 05 September 2023
A novel 1440-V 4H-SiC accumulation mode MOSFET (ACCUFET) with ultra-low specific on-resistance and improved reverse recovery performance is proposed in this article. The specific on-resistance (Ron,sp) of the proposed ACCUFET is reduced by more than 64%. The high-frequency figures-of-merit HFOM [Ron,sp × Cgd] and HFOM [Ron,sp × Qgd] of the proposed device are improved by 53.19% and 58.74%, respectively. The reverse recovery time (trr), and reverse recovery charge (Qrr) are reduced by 23.28% and 82.73%, respectively.
Open AccessModified indirect rotor field‐oriented control strategies for wye‐connected three‐phase induction motor drives under an open‐phase fault
Pages: 2378-2391 | First Published: 09 August 2023
In this paper the stationary reference frame model is presented and utilized to propose a modified field-oriented control method for induction motor drives against the stator winding open circuit fault based on the symmetrical/traditional transformation and using the bi-voltage controller. The performances of the presented control methods are confirmed via simulations and experiments.
Open AccessAn analogous carrier‐based implementation of virtual space vector modulation with low common‐mode voltage and neutral‐point voltage oscillation elimination for three‐level NPC inverter
Pages: 2392-2408 | First Published: 01 August 2023
This paper proposes a virtual space vector modulation strategy for NPC inverter, which can both eliminate NPV oscillation and reduce CMV.
Open AccessStudy on a hybrid algorithm for accurate ripple detection in DC microgrids
Pages: 2409-2422 | First Published: 18 August 2023
In order to improve the power quality of the DC microgrids and realize high-accuracy ripple detection on the DC side, this paper proposed a hybrid algorithm for ripple detection based on a whale optimization algorithm, to optimize the variational modal decomposition parameters. The proposed algorithm is able to determine the optimal decomposition layers and penalty factors, to avoid the generation of false components and under-decomposition. The DC signal can be decomposed into main DC components and ripple signals of different frequencies, and then the instantaneous frequency and amplitude of ripple signals of different frequency bands can be detected. Compared with traditional solutions, the proposed algorithm has higher accuracy in amplitude and frequency of ripple signals detection.
Open AccessModelling and analysis of LCC‐HVDC converter station for harmonic coupling of AC/DC power grid during geomagnetic storm
Pages: 2423-2434 | First Published: 06 August 2023
This paper proposes to study the harmonic coupling between the converter transformer and converter on geomagnetically induced current′s (GIC) effect. The coupling harmonic calculation model of the line commutated converter high voltage direct current (LCC-HVDC) converter station based on harmonic state space (HSS) is established, which considers the half-wave saturation of bias magnetic field of the converter transformer being affected by GIC.
Open AccessA cascaded three‐level buck‐LLC DC/DC converter with high power density for high‐frequency applications
Pages: 2435-2444 | First Published: 18 August 2023
In distributed generation systems, converters play a vital role and DC/DC converter technology is constantly being promoted with the increasing demand for electrical equipment in various industries. A cascaded topology of DC/DC converter has been proposed in this paper, named three-level Buck-LLC(TL-BLLC) converter. In the proposed TL-BLLC, Buck and LLC circuit are cascaded by a switch and a diode, so that the input voltage of the LLC can be adjusted to three levels. The stability of the output voltage of the whole system depends on the three-level weight, so the LLC works at fixed frequency, which simplifies the control and ensures the efficiency. At the same time, compared with the traditional cascaded Buck-LLC, this structure can reduce the processing power and reduce the size of passive elements of the previous Buck. Finally, a 980 W experimental prototype was established and the results of the experiment verified the correctness of the theoretical analysis.
RAPID COMMUNICATION
Open AccessModular multilevel converter‐based voltage source converter high‐voltage direct current valve operating test circuit
Pages: 2445-2448 | First Published: 07 August 2023
This paper proposes a new test circuit for modular multilevel converter (MMC)-based high-voltage direct current (HVDC) valve. The proposed scheme has good features of adequate test current generation, considerably reduced power supply voltage, simplified test circuit topology, and minimized switching loss compared to the conventional test circuits. The validity of the proposed scheme is verified through experimental results.
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