Modular multilevel inverter: pulse width modulation and capacitor balancing technique

Adam, Grain Philip; Anaya‐Lara, Olimpo; Burt, Graeme; Telford, D.; Williams, B.W.; McDonald, J.R.

doi:10.1049/iet-pel.2009.0184

Cited by 221 publications

(132 citation statements)

References 13 publications

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“…In order to a higher reduction of bulky components, high voltage high power converters are gaining popularity for STATCOM applications. In this case, modular multilevel converter (MMC) topologies are the basic of the technology [44], [45]. Another advantage of HV topologies is that they offer more flexibility to be placed at many points of the WPP circuit.…”

Section: B Power Converter Topologiesmentioning

confidence: 99%

Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

Freijedo

Chaudhary

Teodorescu

et al. 2015

2015 IEEE Eindhoven PowerTech

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Abstract-This work reviews the state-of-the-art in the field of harmonic resonance problems in Wind Power Plants (WPPs). Firstly, a generic WPP is modeled according to the equivalent circuits of its passive and active components. Main focus is put on modeling active components, i.e. the ones based on power converters. Subsequently, pros and cons of frequency and time domain analysis methods are outlined. The next sections are devoted to mitigation methods implemented in the power electronics converters. From the wind turbine perspective, different techniques to enhance the robustness of the controller are analyzed. Subsequently, the suitability for active damping of harmonics using STATCOM devices is assessed, with focus both on control techniques and power converter technologies.

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Section: B Power Converter Topologiesmentioning

confidence: 99%

Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

Freijedo

Chaudhary

Teodorescu

et al. 2015

2015 IEEE Eindhoven PowerTech

View full text Add to dashboard Cite

show abstract

“…Arm inductance L limits the inrush and circulating currents between the phases that the converter switches may experience during the balancing process. Proper converter operation requires a robust capacitor voltage balancing strategy to ensure that the voltage across each switching device is controlled over the entire operating range [3,6]. 2 shows one phase of a three-level modular multilevel converter.…”

Section: Three-level M2cmentioning

confidence: 99%

“…By using phase disposition (PD) carrier strategy, n-level MMC needs (n-1) triangular carrier, and they are displayed with same frequency and same amplitude from 1 to -1. A sinusoidal reference wave (with triplens if desired) is then compared to these triangular waveforms and according to the results the gate signal to each IGBT is controlled [3], [4]. Fig.…”

Section: B Sinusoidal Pulse Width Modulationmentioning

confidence: 99%

Mathematical Analysis and Experiment Validation of Modular Multilevel Converters

Zhang¹,

Adam²,

Lim³

et al. 2012

Journal of Power Electronics

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This paper describes operating and capacitor voltage balancing of the modular multilevel converter. The paper focuses on sizing of the cell capacitor and establishes approximate expressions for the capacitor voltage. Simulations and experiments results obtained from three-level modular converter are used to demonstrate its viability in medium voltage applications. It is shown that the modular converter can operate over the full modulation index linear range independent of load power factor.

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“…The calculation and measurement units increases with extension. Reference [11] gives detailed analysis on the combination of PWM and the capacitor voltage balance. The capacitor voltage is introduced as the control signals to modulation wave in [12] and the sequencing process of voltage can be cancelled.…”

Section: Introductionmentioning

confidence: 99%

An Improved MMC Control Strategy with Single-Phase to Ground Fault-Tolerance Capability

Miao¹,

Mashino²,

Zheng³

et al. 2016

Journal of Electrical Engineering and Technology

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-In this paper, an improved modular multilevel converter (MMC) control strategy based on one-cycle control (OCC) is proposed. With the introduction of OCC, the stability, rapidity and disturbance rejection of MMC is greatly improved. Based on the volt-second equilibrium, the control is distributed to every single submodule (SM). For further stability, an unbalanced OCC strategy is designed based on feed-forward control for negative sequence voltage with no need for measuring the positive and negative current sequence, considering single phase to ground fault and the second harmonic ripples of the DC voltage. As the switch frequency of every SM is different, the virtual loop mapping is used in this paper to balance the capacitor voltage with less hardware dependence. And a new simplified structure is also proposed with RS flip-flop abandoned. At last, simulation and experiment results prove the validity of the control theory.

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Modular multilevel inverter: pulse width modulation and capacitor balancing technique

Cited by 221 publications

References 13 publications

Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

Mathematical Analysis and Experiment Validation of Modular Multilevel Converters

An Improved MMC Control Strategy with Single-Phase to Ground Fault-Tolerance Capability

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