Advanced integration of multilevel converters into power system

Dang, H.Q.S.; Watson, Alan J.; Clare, John; Wheeler, Patrick; Kenzelmann, Stephan; Novaes, Yales Rômulo de; Rufer, A.

doi:10.1109/iecon.2008.4758471

Cited by 19 publications

(15 citation statements)

References 7 publications

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“…(2) Method proposed in [27] The method adopted in [27], which is the same with the one used in [20], is shown in (17). The idea is to distribute the duty cycle to each H-bridge so that the total power transferred is guaranteed.…”

Section: B Comparison Of Proposed Methods With Previous Methodsmentioning

confidence: 99%

A new voltage-balancing controller in cascaded multilevel converters

She

Huang

Wang

et al. 2011

2011 IEEE Energy Conversion Congress and Exposition

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Voltage-balancing controller in cascaded multilevel converters has been discussed extensively in previous literatures where several effective methods have been proposed. The coupling effect between a voltage-balancing controller and the original system controller is however not addressed comprehensively. This paper proposes a new voltage-balancing controller for single-phase cascaded multilevel converters in a dq coordinate. The theoretical finding shows that the proposed method can effectively eliminate the coupling between two controllers in both steady and dynamic state. Simulation and experimental results validate the proposed method.

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Section: B Comparison Of Proposed Methods With Previous Methodsmentioning

confidence: 99%

A new voltage-balancing controller in cascaded multilevel converters

She

Huang

Wang

et al. 2011

2011 IEEE Energy Conversion Congress and Exposition

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“…The red and green lines set the active power limits on Port 2 and on Port 3 beyond which a unity power factor operation is not allowed. In the operating areas A and D reactive power on Port 1 is not required, whereas, in the operating areas B and C it is necessary to provide a certain amount of reactive power [8]. The equations that link P 2 and P 3 , identifying the operative areas, can be expressed as:…”

Section: A System Limitation Overviewmentioning

confidence: 99%

“…However, an in-depth analysis have shown limitations on the power flow capability [8] which can be highlighted accounting the simplified model of one phase of Port 1, shown in Figure 4. The AC/DC converter on Port 1 is divided in two converters: one 3-cell Cascaded H-Bridge enabling power flow to Port 2 and an H-Bridge connected to Port 3.…”

Section: A System Limitation Overviewmentioning

confidence: 99%

“…(5) the ratio is independent of the value of the active powers. In [8] [9] it is suggested that having to fix at least two reactive power values, for example, to fix one of Q 1 and one of Q 2 and Q 3 obtaining the last reactive power from one of the proposed methods. However, considering the simplified circuit in Figure 4 it is possible to write the equation that links the reactive power as:…”

Section: Reactive Power Control Strategiesmentioning

confidence: 99%

“…In [7] a control of Power flow profiles has been studied in different network conditions, but the UNIFLEX converter has been allowed to operate with only two ports. In [8] the limitations that the UNIFLEX configuration present when the converter works with all three ports in certain working conditions are investigated. In such conditions, the authors have shown that it is not possible to reach a unitary power factor, as it is necessary to supply a certain amount of reactive power to ensure the active power demand.…”

Section: Introductionmentioning

confidence: 99%

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Reactive power control strategies for UNIFLEX-PM Converter

Pipolo

Bifaretti

Bonaiuto

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-The paper presents various control strategies for an advanced multilevel-based power converter. A Fuzzy Logic Control, based on power balance constrains and Proportional Reactive Power control based on a more rigorous approach, have been proposed. Two different ways to assign reactive powers have been illustrated for both the control strategies and then compared in Matlab/Simulink environment accounting two active power sets. Finally, advantages and drawbacks of the proposed strategies have been highlighted.

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