Analysis and Control of the Modular Multilevel Matrix Converter Under Unbalanced Grid Conditions

Liu, Shenquan; Saeedifard, Maryam; Wang, Xifan

doi:10.1109/jestpe.2018.2812723

Cited by 25 publications

(26 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first one is fundamental current and does not need to be analyzed. The expression of the second component is calculated and shown in (14). As it shows, the first of the three terms of the arm currents at 60 Hz has the same magnitude and phase angle for all nine arms of M 3 C. As a result, it behaves as zero-sequence current for AC systems at both sides and it flows into both systems with equal magnitude if no countermeasure was implemented.…”

Section: B Arm Current Harmonicsmentioning

confidence: 99%

“…The topology is similar with the traditional matrix converter but there are significant differences with the inclusion of multilevel H-bridge sub-modules. Two main applications of M 3 C are motor driving [11]- [13] and wind energy transmission [9], [14], [15]. In [11], a control strategy for M 3 C based on dq transformation was proposed for motor driving and it was validated by experiment using a 400 V, 15 kW prototype.…”

mentioning

confidence: 99%

“…In [9], this method was further improved for FFTS by introducing the cross synchronous rotating frames, so that DC values are dealt with at most time in current loops. In [14], a feedforward compensation strategy was proposed. Simulation results show that with the proposed control method, M 3 C can cope with unbalanced grid conditions.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Harmonic Analysis of Modular Multilevel Matrix Converter for Fractional Frequency Transmission System

Luo

Zhang

Xue

et al. 2020

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

Fractional Frequency Transmission is a competitive technology for offshore wind power transmission. Modular Multilevel Matrix Converter (M 3 C) plays a key role in a Fractional Frequency Transmission System (FFTS) as the frequency changer. M 3 C is broadly considered as the AC-AC converter for the future with its attractive advantages in high voltage and high power applications. Due to the lack of a DC link, electrical quantities at different frequencies from two AC systems couple in M 3 C, resulting in a complex harmonic condition. Harmonics can lead to stability issues and its analysis is of great importance. This paper focuses on the harmonic analysis of M 3 C. The arm capacitor voltage ripples and the harmonic currents are analyzed at various frequencies. Major factors influencing the harmonics magnitude are discussed. Analysis is conducted on sub-module capacitance and arm inductance selection. A zero-sequence current mitigation controller for M 3 C is implemented and tested. It is found that for a FFTS, some current harmonics flow into AC systems even though the system is balanced, while the others circulate within the converter. The theoretical harmonic analysis is verified by simulations in Real Time Digital Simulator (RTDS) of a M 3 C system where each arm consists of forty sub-modules. Index Terms-Fractional frequency transmission system, harmonic analysis, modular multilevel matrix converter (M 3 C), offshore wind power, energy storage. I. INTRODUCTION U NDER the pressure of fossil energy depletion and environmental pollution, renewable energy development has drawn worldwide attention. Offshore wind power is favored with merits of not taking up land in cities, rich and stable resource and suitability for large-scale development. Three main offshore Manuscript

show abstract

Section: B Arm Current Harmonicsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Harmonic Analysis of Modular Multilevel Matrix Converter for Fractional Frequency Transmission System

Luo

Zhang

Xue

et al. 2020

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

show abstract

“…Multilevel converters are one of the promising topologies in providing better output waveform quality with lower harmonic distortions . It involves the concept of utilizing various small DC voltage levels in producing AC voltage waveform.…”

Section: Categories Of Mcsmentioning

confidence: 99%

“…Multilevel converters are one of the promising topologies in providing better output waveform quality with lower harmonic distortions. [73][74][75] It involves the concept of utilizing various small DC voltage levels in producing AC voltage waveform. The smaller the voltage step, the smaller will be the harmonic distortion and lower switching losses.…”

Section: Multilevel Matrix Convertersmentioning

confidence: 99%

Matrix converters for electric power conversion: Review of topologies and basic control techniques

Alammari

Aleem

Iqbal

et al. 2019

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary A matrix converter (MC) is a topology for ac‐ac power conversion that has been widely investigated and compared with conventional ac‐dc‐ac topologies because of its attractive features. The MC is formed of controlled active devices and does not include any sizeable passive components. The converter can be used to directly control single/three/multiphase loads. MCs are highly effective in controlling the power factor and providing sinusoidal input and output currents. This paper provides a comprehensive state of the art review of the MC and discusses the main topology variations including single‐phase conventional and isolated MCs, three‐phase direct and indirect MCs, impedance source (Z‐source) MCs, multiphase MCs, and multilevel MCs (MMCs). The aim of this research article is to provide a one‐stop information on single/three/multiphase matrix, Z‐source matrix, and multilevel MCs for potential readers, researchers, and practicing engineers.

show abstract

Dual‐passivity‐based control strategy of modular multilevel matrix converter

Cheng

et al. 2020

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Analysis and Control of the Modular Multilevel Matrix Converter Under Unbalanced Grid Conditions

Cited by 25 publications

References 16 publications

Harmonic Analysis of Modular Multilevel Matrix Converter for Fractional Frequency Transmission System

Harmonic Analysis of Modular Multilevel Matrix Converter for Fractional Frequency Transmission System

Matrix converters for electric power conversion: Review of topologies and basic control techniques

Dual‐passivity‐based control strategy of modular multilevel matrix converter

Contact Info

Product

Resources

About