Results 31 to 40 of about 203 (153)
The analytical model of modular multilevel converter based on the harmonic balance theory
Energy Reports, 2020 This paper proposes an analytical model for the modular multilevel converter (MMC) based on the theory of harmonic balance, which removes the iteration process for traditional models. The proposed model considers dynamic harmonic interactions between the
Lijun Xie +5 more
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IET Generation, Transmission & Distribution, 2023 The Fractional Frequency Transmission System (FFTS) operates with low frequency to decrease the electrical length of AC transmission lines, consequently enhancing transmission capacity.
Zhongqi Cai +6 more
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Analysis of two-phase operation characteristics of a flexible low-frequency transmission system
Zhejiang dianli, 2022 The two-phase operation mode of a flexible low-frequency transmission system is based on the M3C （modular multilevel matrix converter）. This paper establishes a complex sequence network for the low-frequency system to analyze the steady-state operation ...
LU Yi +6 more
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IEEE Open Journal of Power ElectronicsStaircase modulation is a switching technique ubiquitous in multilevel inverters utilizing large number of output voltage levels. With tens of levels, the output of a multilevel inverter employing staircase modulation approaches a sinusoid without ...
Rami F. Yehia +3 more
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World Electric Vehicle Journal, 2023 Aiming at the stability of a medium-voltage DC network based on a modular multilevel converter (MMC), this paper proposes an admittance stability criterion considering the influence of current-limiting inductors at the medium voltage side, which prevents
Jinggang Yang +5 more
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Novel modular multilevel matrix converter topology for efficient high-voltage AC-AC power conversion
Electrical engineering & ElectromechanicsIntroduction. This paper delves into the practical application of multilevel technology, particularly focusing on the capacitor-clamped converter as a promising solution for medium-to-high voltage power conversion, with specific emphasis on direct AC-AC ...
F. Saidi +4 more
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Energies, 2019 In this paper, the impact of a double-sided press-pack insulated-gate-bipolar-transistor (PP IGBT) cooling structure on its thermal impedance distribution is studied and explored. A matrix thermal impedance network model is built by considering the multi-
Yao Chang +6 more
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Zhejiang dianli, 2022 Due to the long delay of their control chains， voltage source converters （VSCs） in the high frequency band tend to show negative damping， which may give rise to high-frequency resonance when VSCs are connected to power systems.
HUA Wen +6 more
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电力工程技术Variable speed pumped storage units have obvious advantages in efficiency and adaptability under various operation conditions compared with traditional fixed-speed pumped storage units.
Bo ZHAO +5 more
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A Modular Multilevel Matrix Converter for High Speed Drive Applications
, 2016 The Modular Multilevel Matrix Converter (M3C) performs a direct three-phase AC to AC power conversion and is highly suitable for medium voltage high power drive applications. One area of application are high speed drives such as compressors. However, additional balancing power components which reduce the output power capability of the M3C when input ...
Bräckle, Dennis +4 more
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