Results 21 to 30 of about 150,728 (293)
Energies, 2017 This paper analyses the effects of doubly fed induction generator (DFIG) tidal current turbines on a distribution grid under unbalanced voltage conditions of the grid.
Dahai Zhang +5 more
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Improved DPC Strategy of Grid-connected Inverters under Unbalanced and Harmonic Grid Conditions [PDF]
Journal of international Conference on Electrical Machines and Systems, 2013 This paper presents an improved direct power control (DPC) strategy for grid-connected voltage source inverter (VSI) under unbalanced and harmonic grid voltage conditions. Based on the mathematic model of VSI with the negative sequence, 5th and 7th harmonic voltage components consideration, a PI controller is used in the proposed DPC strategy to ...
null Yongbo Shen, null Heng Nian
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IET Power Electronics, 2023 The operational stability of grid‐connected converters is affected by unbalanced grid voltage, which often leads to overcurrent. The traditional control method maintains the grid‐into current within the rated limit by adjusting the current reference ...
Qi Wang, Peng Yu, Peng Wang
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Energy Reports, 2022 In the DC power distribution systems, One-cycle control (OCC) based three-phase VIENNA rectifiers achieves high power factor (PF) easily. However, under unbalanced grid conditions, the fundamental phase shift between the input current and corresponding ...
Jianguo Lyu +5 more
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, 2021 A modular multilevel converter’s (MMC’s) submodule (SM)-capacitor voltage will increase under unbalanced grid conditions. Depending on the imbalance level, the voltage ripple can be considerably high, and it can exceed the pre-defined safe limits.
Songda Wang +4 more
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Passive Sliding Mode Controlled UPFC and its Treatment Strategy of Unbalanced Grid Conditions
Frontiers in Energy Research, 2021 Modular multilevel converter based unified power flow controller (MMC-UPFC) can provide flexible power regulation and plays an important role in the smart grid and future distribution networks.
Yang Chen +5 more
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Advanced Vector Controller for a Four-Switch Three-Phase Rectifier under Unbalanced Grid Voltage
International Transactions on Electrical Energy Systems, 2022 One of the main challenges of a four-switch three-phase rectifier (FSTPR) is a DC imbalance in capacitor voltages. On the other hand, under unbalanced grid voltage conditions, unbalanced three-phase input current and the DC-link voltage affect the ...
M. Alizadeh Bidgoli, S. Honarbari
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Energy Reports, 2022 Normally, a grid-tied inverter with model predictive power control (MPPC) possesses a fast dynamic response and outstanding static performance. However, under unbalanced and distorted grid conditions, such a grid-tied inverter is troubled by considerable
Zhi Zhang, Longyun Kang, Bihua Hu
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Journal of Modern Power Systems and Clean Energy, 2021 The grid-connected converter (GCC) is widely used as the interface between various distributed generations and the utility grid. To achieve precise power control for GCC, this paper presents a model predictive direct power control (MPDPC) with ...
Weichen Yang +5 more
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Experimental Evaluation of Grid-Forming Inverters Under Unbalanced and Fault Conditions
IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, 2020 With inverter-based distributed energy resources (DERs) becoming more prevalent in grid-connected or islanded distribution feeders, a better understanding of the performance of these devices is needed. Increasing the amount of inverter-based generation, and therefore reducing conventional generation, i.e.
Nicholas S. Gurule +4 more
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