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Three-phase

About: Three-phase is a research topic. Over the lifetime, 16801 publications have been published within this topic receiving 159477 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, an adaptive notch filter-based multipurpose control scheme for grid interfacing DG inverter under corrupted grid conditions is proposed, which is capable of extracting instantaneous symmetrical components and harmonic components of three-phase signals.
Abstract: The power electronic converter and its control system form an integral part of distributed generation (DG) systems interfacing renewable energy sources to the utility network. This paper proposes an adaptive notch filter-based multipurpose control scheme for grid interfacing DG inverter under corrupted grid conditions. The proposed control scheme uses a frequency adaptive sequence components extractor, which is capable of extracting instantaneous symmetrical components and harmonic components of three-phase signals. The DG inverter in this study consists of three single-phase voltage source inverters with common dc bus and coupled to utility grid via three single-phase transformers. The proposed control scheme enables the DG inverter to perform multiple tasks such as reference power injection to grid, low voltage ride through, load reactive power support, and compensation of harmonic, unbalanced, and neutral currents. The efficacy of the proposed control scheme is evaluated through MATLAB/Simulink simulations and experimentally verified using a hardware-in-the-loop based system.

64 citations

Journal ArticleDOI
TL;DR: It is shown that the three-phase -switch rectifier (comprising three -connected bidirectional switches) is well suited for this application and a novel PWM current controller modulation concept is presented, where all three phases are controlled simultaneously.
Abstract: In the course of the More Electric Aircraft program frequently active three-phase rectifiers in the power range of several kilowatts are required. It is shown that the three-phase -switch rectifier (comprising three -connected bidirectional switches) is well suited for this application. The system is analyzed using space vector calculus and a novel PWM current controller modulation concept is presented, where all three phases are controlled simultaneously; the analysis shows that the proposed concept yields optimal switching sequences. Analytical relationships for calculating the power components average and rms current ratings are derived to facilitate the rectifier design. A laboratory prototype with an output power of 5 kW is built and measurements taken from this prototype confirm the operation of the proposed current controller. Finally, initial EMI-measurements of the system are also presented.

64 citations

Proceedings ArticleDOI
06 Nov 2009
TL;DR: In this article, the authors analyzed the performance of a three phase flying capacitor multilevel converter under the spectrally optimal phase disposition (PD) PWM strategy and showed that PD PWM has superior balancing characteristics compared to the phase shifted carrier (PSC)PWM strategy, because it places more spectral energy into the differential mode sideband harmonics.
Abstract: This paper analyses the natural voltage balancing characteristic of a three phase flying capacitor multilevel converter when it is operated under the spectrally optimal Phase Disposition (PD) PWM strategy. Using this analysis, it is shown that PD PWM has superior balancing characteristics compared to the Phase Shifted Carrier (PSC)PWM strategy, because it places more spectral energy into the differential mode sideband harmonics that drive the voltage balancing process. From this understanding, an enhanced balance booster filter network connection is proposed that significantly improves the natural balancing response of a flying capacitor converter for either PWM strategy. The analysis is confirmed by extensive simulation and experimental studies.

63 citations

Journal ArticleDOI
TL;DR: A modulation and controller design method for paralleled Z-source inverter systems applicable for alternative energy sources like solar cells, fuel cells, or variable-speed wind turbines with front-end diode rectifiers is presented in this paper.
Abstract: This paper presents a modulation and controller design method for paralleled Z-source inverter systems applicable for alternative energy sources like solar cells, fuel cells, or variable-speed wind turbines with front-end diode rectifiers. A modulation scheme is designed based on simple shoot-through principle with interleaved carriers to give enhanced ripple reduction in the system. Subsequently, a control method is proposed to equalize the amount of power injected by the inverters in the grid-connected mode and also to provide reliable supply to sensitive loads on-site in the islanding mode. The modulation and controlling methods are proposed to have modular independence so that redundancy, maintainability, and improved reliability of supply can be achieved. The performance of the proposed paralleled Z-source inverter configuration is validated with simulations carried out using Matlab/Simulink/Powersim. Moreover, a prototype is built in the laboratory to obtain the experimental verifications.

63 citations

Proceedings ArticleDOI
15 Sep 2013
TL;DR: In this paper, a state-space current control method for active damping of the resonance frequency of the LCL filter and setting the dominant dynamics of the converter current through the direct pole placement is presented.
Abstract: This paper presents a state-space current control method for active damping of the resonance frequency of the LCL filter and setting the dominant dynamics of the converter current through the direct pole placement. A state observer is used, whereupon additional sensors are not needed compared to the conventional L filter design. The relationship between the system delay and instability caused by the resonance phenomenon is considered. Nyquist diagrams are used to examine the parameter sensitivity of the proposed method, and the method is validated with simulations and experiments.

63 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023111
2022291
2021475
2020826
20191,037
20181,103