Results 21 to 30 of about 5,668 (267)
Zhongguo dianli, 2019 Three-phase four-switch rectifier has the problem of unbalanced capacitor voltage because one phase of its AC side is directly connected between two capacitor neutral points on the DC side.
Baoge ZHANG, Weijie MA
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Energy Reports, 2022 The imbalance of capacitor voltage on the DC side of the inverter will cause the third-order current harmonics and the device will be damaged greatly with the increase of voltage stress.
Yingjun Guo +7 more
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Research of control strategy of modular multilevel rectifier
Gong-kuang zidonghua, 2014 In view of problem that capacitor voltage balance control strategy of common modular multilevel converter has a large fluctuation of capacitance voltage, a composite capacitor voltage control strategy was proposed on the basis of analysis of mechanism of
LI Shuai +3 more
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IET Power Electronics, 2023 This study presents a submodule capacitor voltage self‐balancing method for modular multilevel converters (MMCs) based on switching state matrix construction, which has an advantage over eliminating massive sensor demanding and alleviating computational ...
Zhou Yiyuan +7 more
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Control strategy of the modular multilevel matrix converter under unbalanced grid condition
电力工程技术, 2023 Modular multilevel matrix converter (M3C) is a new topology of AC-AC power converter, which has very broad application in low frequency transmission system, high-power asynchronous motor speed regulation and low offshore wind power transmission.
LU Yu +5 more
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Analysis of Maximum Load Unbalancing Limits of Cascaded H-Bridge Rectifier Under Unity Power Factor
IEEE Access, 2019 In a cascaded H-bridge rectifier (CHBR), the dc capacitor voltages need to be controlled to balance by the voltage balance controller when the loads are unbalanced.
Zhixuan Gao +5 more
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Capacitor Voltages Measurement and Balancing in Flying Capacitor Multilevel Converters Utilizing a Single Voltage Sensor [PDF]
IEEE Transactions on Power Electronics, 2017 This paper proposes a new method for measuring capacitor voltages in multilevel flying capacitor (FC) converters that requires only one voltage sensor per phase leg. Multiple dc voltage sensors traditionally used to measure the capacitor voltages are replaced with a single voltage sensor at the ac side of the phase leg.
Farivar, Glen +4 more
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Zhongguo dianli, 2019 The capacitor voltage balance of modular multilevel converter is the key to its stable operation, aiming at problem of large calculation amount and high switching frequency existing in traditional capacitor voltage balancing strategy. This paper proposes
Fengyang GAO +3 more
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Hybrid DC Converter with Current Sharing and Low Freewheeling Current Loss
Energies, 2020 A new hybrid high-frequency link pulse-width modulation (PWM) converter using voltage balance capacitor and current balance magnetic coupling is proposed to realize low freewheeling current loss and wide load range of soft switching operation.
Bor-Ren Lin, Guan-Yi Wu
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A Single-Phase Transformerless Nine-Level Inverter and Its Control Strategy
Energies, 2022 To reduce the device number per unit level of the existing nine-level inverters, a topology of single-phase transformerless nine-level inverter was proposed. The proposed topology consists of only 10 switching devices and 4 capacitors.
Yuan Li +4 more
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