Dec 11, 2024 · Circulating current suppression can effectively improve the reliability and redundancy of parallel inverter systems. The mechanism and influencing factors of the low-
Aug 16, 2025 · Unlike conventional centralized frequency control strategies, this approach allows for flexible and modular power system operation, significantly improving grid reliability under
Jul 27, 2016 · A control strategy for input-series-output-parallel (ISOP) connected modular high frequency isolated AC–AC converter is proposed in this study. The circulating currents among
Nov 1, 2016 · The parallel inverters are destined to achieve certain attributes such as proper current distribution, voltage regulation, accurate load sharing and synchronization of
Nov 1, 2012 · This paper presents a control strategy for input-series–output-parallel (ISOP) modular inverters. Each module is a high-frequency (HF) ac link (HFACL) inverter composed
Jul 12, 2024 · Abstract This paper presents a full digital control strategy for parallel connected modular inverter systems. Each modular inverter is a high frequency (HF) AC link inverter
Aug 20, 2019 · In this study, a circulating current suppression strategy is proposed using high-frequency voltage compensation when asynchronous carriers exist between modules in
Apr 18, 2025 · This study presents a novel multilevel inverter drive topology, which is powered by a single battery source and uses a small, affordable high-frequency link (HFL) to generate
Nov 2, 2011 · This paper presents a control strategy for input-series-output-parallel (ISOP) modular inverters. Each module is a high-frequency (HF) ac link (HFACL) inverter composed
Jul 12, 2024 · This paper presents a full digital control strategy for parallel connected modular inverter systems. Each modular inverter is a high frequency (HF) AC link inverter which is...
Mar 14, 2023 · A four-module 13.56 MHz high-frequency inverter prototype is built and tested. The results show that the inverter can operate at high efficiency and wide output power range with
Jul 11, 2022 · Research results of induction heating transistor high - frequency series resonant inverters with modular structure on the base of parallel – series connection are presented in
Jan 28, 2025 · Abstract: High-Frequency Link inverters (HFLIs) have attracted significant research attention owing to their compact design, high power density, and high efficiency. HFLI systems
Jul 20, 2012 · PDF | This paper presents a full digital control strategy for parallel connected modular inverter systems. Each modular inverter is a high frequency... | Find, read and cite all
Feb 1, 2025 · However, its drawback lies in the requirement of customization to develop appropriate modulation strategies. In interleaved paralleling, the circulating current is primarily
Aug 27, 2019 · Abstract—In order to provide high and extendable power levels for inductive power transfer (IPT) system, a parallel multi-inverter system based on modular inverter is presented.
Feb 27, 2023 · By contrast, the carrier wave discrepancy of inverters can result in asynchronous switching sequences in each module, generating high-frequency circulating cur-rent [20–22].
Parallel-connected modular inverters are widely used in high-power applications to increase the power capacity of the system. These modular inverters ofer convenient maintenance and an adjustable power rating.
Various modulation methods, such as double reference PWM (DRPWM) and interleaved discontinuous PWM (IDPWM), have been proposed to reduce the high-frequency circulating current of various modular inverters .
For integrated modulation, it is necessary to decompose each switching state into parallel three-level inverters, thus requiring a special design to ensure that the distribution of the parallel bridge states contributes to an increase in the output current quality and a reduction in the circulating current.
Compared with traditional interleaved paralleling, the integrated paralleling of three-level inverters can further reduce the output harmonics. Moreover, a well-designed switching sequence ensures that the average circulating current is zero, which provides a superior and feasible solution to satisfy the demands of high-power operations.
Modular inverters have a closed circuit when each inverter shares the common DC source and AC bus. The cir-culating current is generated by diferences in each inverter, such as hardware parameters and control process. The circulating current deteriorates the output current quality and degrades the reliability of the parallel system [12–15].
There are two types of circulating current in parallel inverters: low-frequency and high-frequency circulating current. The low-frequency cir-culating current is parameter related, such as imperfect sym-metry in hardware and dependent control of parallel inverter dead time [18, 19].
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