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 | IET Power Electronics Volume 17, Issue 2 Pages: 183-349 5 February 2024 |
ORIGINAL RESEARCH
Open AccessA modified control strategy for LCC with IGCT‐based full‐bridge submodules to solve the commutation failure issues
Pages: 183-198 | First Published: 13 December 2023
The paper proposes a hybrid solution combining the LCC inverter with the continuously controlled IGCT-based full-bridge submodules (FBSMs) to solve the CF issues. The scheme can provide the LCC inverter with an additional commutation area, and compensate for the phase-shift of the grid voltage under faults. With the decoupled control strategies of LCC and FBSMs, the proposed scheme can achieve better control effect and better CF resistance ability with less submodules compared with the existing controllable capacitor scheme.
Open AccessA family of Z‐source‐based half‐bridge inverters: Topology derivation
Pages: 199-212 | First Published: 04 January 2024
This paper presents a generalized structure from which 16 configurations can be derived. Once this topology has been introduced, one of the derived topologies, out of 16, is analyzed in detail based on the appropriate control method.
Open AccessExperimental evaluation of the backstepping‐based input resistance controller in step‐up DC–DC converter for maximum power point tracking of the thermoelectric generators
Pages: 213-229 | First Published: 09 December 2023
This paper introduces the research on the inductance-capacitor-capacitor-inductance grid-connected inverter using active disturbance rejection and grid voltage feedforward coordinated control technology. The pade approximation is performed on the inductance-capacitor-capacitor-inductance filter to derive the first-order discretization mathematical model of the system.
Open AccessBidirectional wide range and high voltage gain buck‐boost DC‐DC converter for EV chargers empowering V2G‐G2V applications
Pages: 230-250 | First Published: 10 December 2023
This paper proposes a new wide range bidirectional buck-boost dc-dc converter with improved voltage gain in either forward (discharging) or backward (charging) direction for electric vehicle (EV) applications. The converter has high-voltage gain ratio with no theoretical limits in the output voltage in both directions, and presents a good balance between the component count, number of conducting components, semiconductor device ratings, having common ground, and efficiency which makes it a practical solution for the EV charger levels 1, 2, and 3 power converter unit.
Open AccessA non‐isolated single‐switch ultra‐high step‐up DC–DC converter with coupled inductor and low‐voltage stress on switch
Pages: 251-265 | First Published: 20 December 2023
-This paper presents a non-isolated single-switch ultra-high step-up DC–DC converter with a three-winding coupled inductor which is utilized to achieve ultra-high voltage gain with a small amount of duty cycle leading to low conduction losses of the power switch and higher efficiency.
-Due to the utilization of the passive clamp circuit in the structure of the proposed converter, it is possible to select a power switch with low voltage rated and small ON-state resistance, further enhancing the converter efficiency.
-Finally, to accredit the performance of the proposed converter, a 150-W laboratory archetype with an input and output voltage of 20 and 300 V, respectively, at 50-kHz switching frequency is fabricated.
Open AccessPower and signal dual modulation‐based bidirectional communication between intrinsically safe converters
Pages: 266-280 | First Published: 20 December 2023
In harsh operating environments, intrinsically safe power converters are required for electronic devices. Reliable communication is the key to ensure good performance of monitoring and coordinated control for intrinsically safe converters. This paper proposes a power and signal dual modulation (PSDM)-based communication method by combining the frequency shift keying (FSK) and phase shift keying (PSK) methods for intrinsically safe parallel-connected converters.
Open AccessA bidirectional high voltage ratio DC–DC topology for energy storage systems in microgrid
Pages: 281-294 | First Published: 23 December 2023
This study proposes a bidirectional DC-to-DC converter with low voltage stress on its semiconductor elements and high voltage gain. In the proposed converter's structure, the coupled inductor not only offers large voltage gain, but it also decreases overall voltage stress through the switches.
Open AccessAnalysis and small‐signal modelling technique for support bus DC‐link of front‐end coupling inductance high step‐up single switch boost converter in low voltage renewable source
Pages: 295-311 | First Published: 21 December 2023
This paper presented the high output voltage conversion ratio non-isolated DC converter, which would be applied in the electricity generation system from the substitute source, to upgrade the low-voltage to the high-voltage DC, then series connected with DC–AC inverter. The presented converter had the topology development from DC boost converter with the limitation of the low-voltage conversion ratio, which was developed and corrected with the coupling inductance technique by adding the second winding L2 to coupling with the prototype winding and diode D2. This technique could increase the higher voltage ratio via the ratio operate (N) of both induction coils, with the operating of a single switch, at the constant frequency 60 kHz. It worked according to the pulse width modulation with the duty cycle ≤40%. This converter receives low voltage input 36 VDC provide to high voltage output 325 VDC, at the output power 125 W and the circuit efficiency equal to 92.48%, at the full load. And could maintain the output voltage by PI control under changing of output loading condition. According, it were found that the obtained close loop results from simulation and implementation results verified the proposed and design circuit. Both results agreed with the theoretical analysis.
Open AccessPower flow control in a modular converter with energy storage
Pages: 312-325 | First Published: 24 December 2023
This article proposes a novel energy flow control system for a modular and scalable power electronic converter that is used to electrify electromagnets in high-energy physics experiments at the European Organisation for Nuclear Research (CERN). The proposed control scheme is able to optimise the operation of the scalable converter for four different key metrics, which are validated experimentally in a full-scale, 800 kW laboratory prototype.
Open AccessDSP‐based energy optimization management of household single‐phase electric energy router with historical and real‐time data
Pages: 326-336 | First Published: 25 December 2023
An economic energy optimization management method of single-phase electric energy router (SPEER) with historical data of previous day and real-time data in the grid-connected mode is proposed, which can be realized by DSP. Based on the exchange power between the SPEER and the grid, the optimal charge and discharge power of the battery to make up for the energy difference between the previous day and the real time is obtained through the particle swarm intelligence algorithm, and the optimal economic model of SPEER operation is established.
Open AccessDual‐input single‐output high step‐up DC–DC converter for renewable energy applications
Pages: 337-349 | First Published: 04 January 2024
In this manuscript, a new dual-input single-output (DISO) non-isolated dc–dc converter is presented. In this converter, the bidirectional and unidirectional power flow is feasible. The DISO high-voltage gain converter provides flexible control options, decreases current and voltage stress on semiconductors, and there is no duty cycle limitation due to the proposed switching methods.
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