Optimal operation mode for Modular Multilevel Converter based HVDC

Maragliano, G.; Marchesoni, M.; Vaccaro, Luis

doi:10.1109/speedam.2014.6872067

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…However, including higher order harmonics in the circulating current [17]- [19] provides secondary benefits to the MMC, predominantly in reducing the SM capacitor voltage ripple [17], allowing for a reduction in the size of the SM capacitors and the energy stored within the MMC topology. The off-line optimisation of [18] calculates the optimal level of even-order harmonics (a second and a combination of a second and fourth order harmonics) in the circulating current for all operating points and load conditions leading to a minimum in the SM capacitor voltage ripple.…”

Section: Circulating Current and Control In Modular Multilevel Comentioning

confidence: 99%

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Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels

Konstantinou

Pou

Ceballos

et al. 2016

IEEE Trans. Power Electron.

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Amongst the main control targets in a modular multilevel converter (MMC) is the control of the circulating currents within the phase-legs of the topology. This paper presents a controller for the circulating current of the MMC that utilises the available redundancies of the multilevel waveform in 2N + 1 modulated MMCs in order to regulate the circulating current to its reference. The main advantages of the approach are the elimination of control loops that generate the reference voltages for the control of the circulating current, simple implementation and very fast dynamic performance. The controller is implemented at the modulation stage and its operation is independent of the circulating current reference. An extension of the controller to track large deviations in the circulating current is also demonstrated. The simplicity and effectiveness of the proposed controller is illustrated through detailed simulations and experimental results from a single-phase laboratory prototype.

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Section: Circulating Current and Control In Modular Multilevel Comentioning

confidence: 99%

“…Analytical methods of calculating these harmonics [17], [19] can provide similar performance. An issue of these methods is the high computational cost or complexity when more than two harmonics are included in the current reference and the overall increase in the rms value of the arm current.…”

Section: Circulating Current and Control In Modular Multilevel Comentioning

confidence: 99%

Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels

Konstantinou

Pou

Ceballos

et al. 2016

IEEE Trans. Power Electron.

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“…The reason is the ned only by increasing the number of its cells. HVDC applications is very high, with V DC highe inimizing the AC filter and in many cases elimina ing efficiency and also minimizing capacitors v ws the analytical results of [4] indicating the infl ple, and consequently gives the conditions minim…”

Section: Ating Current For Optimal Operation Applicationsmentioning

confidence: 99%

“…In [4] the authors have analyzed the system considering the first terms of the Taylor expansion for the leg currents , , as shown in (5) and (6); then, they have found the working conditions that minimize the capacitor energy ripple,…”

Section: Converter Analysismentioning

confidence: 99%

Study of the MMC circulating current for optimal operation mode in HVDC applications

Marchesoni¹,

Vaccaro²

2015

2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe)

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“…More submodules can be put side by side or on top of each, with a great exploitation of the available space. On the contrary, the MMC concept attracts the attention in high-power and high-voltage applications [40,62,63,[77][78][79]: electrical drives [80], HVDC [81][82][83][84][85], photovoltaic [86] and in stationary installations that supply the primary lines of German railways (i.e., from 110 kV-50 Hz three-phase to 110 kV-16.7 Hz single-phase).…”

mentioning

confidence: 99%

Solid-State Transformers in Locomotives Fed through AC Lines: A Review and Future Developments

et al. 2019

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One of the most important innovation expectation in railway electrical equipment is the replacement of the on-board transformer with a high power converter. Since the transformer operates at line-frequency (i.e., 50 Hz or 16 2/3 Hz), it represents a critical component from weight point of view and, moreover, it is characterized by quite poor efficiency. High power converters for this application are characterized by a medium frequency inductive coupling and are commonly referred as Power Electronic Transformers (PET), Medium Frequency Topologies or Solid-State Transformers (SST). Many studies were carried out and various prototypes were realized until now, however, the realization of such a system has some difficulties, mainly related to the high input voltage (i.e., 25 kV for 50 Hz lines and 15 kV for 16 2/3 Hz lines) and the limited performance of available power electronic switches. The aim of this study is to present a survey on the main solutions proposed in the technical literature and, analyzing pros and cons of these studies, to introduce new possible circuit topologies for this application.

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Optimal operation mode for Modular Multilevel Converter based HVDC

Cited by 10 publications

References 3 publications

Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels

Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels

Study of the MMC circulating current for optimal operation mode in HVDC applications

Solid-State Transformers in Locomotives Fed through AC Lines: A Review and Future Developments

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