Modular multilevel converter electrical circuit model for HVdc applications

Ferreira, Abel; Collados, Carlos; Gomis‐Bellmunt, Oriol; Teixido, Miquel

doi:10.1109/epe.2015.7309386

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…The energy difference controller is depicted in Fig. 5, where V G is the RMS value of the AC grid voltage, R is defined in (10) and K is defined in (11) . This controller guarantees the specification 3 (i.e.…”

Section: Fig 4 Energy Sum Controller (Phase J)mentioning

confidence: 99%

“…The three common-mode currents (for each phase j) are corrected to their references via PI controllers as well [11]. Finally, the modulation signals m U j and m L j are obtained according to:…”

Section: Fig 4 Energy Sum Controller (Phase J)mentioning

confidence: 99%

“…For multiplying the output of the energy-difference controller by the matrix R and K defined in (10) and (11) respectively, it is necessary to obtain the three-phase vector I Σ * abc,ac as a function of the components dqZ, which is obtained as:…”

Section: Energy-difference Controller Reformulationmentioning

confidence: 99%

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State-space modelling with steady-state time invariant representation of energy based controllers for modular multilevel converters

Freytes

Bergna-Diaz

Suul

et al. 2017

2017 IEEE Manchester PowerTech

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The average value model of the Modular Multilevel Converter (MMC) is in general non-linear with time periodic variables. Recent developments demonstrated how the MMC model can be transformed into a a Steady-State Time Invariant (SSTI) representation allowing for linearization of the model. While previous modeling efforts for small-signal eigenvalue analysis considered mainly the classical Circulating Current Suppressing Controller (CCSC), this paper presents an approach for representing a complete energy-based control system in a set of Synchronously Rotating Frames (SRFs). This is obtained by separating the state variables according the their frequency components and applying corresponding Park transformations. The resulting model is based on existing controllers implemented in the stationary abc frame, and enables small-signal stability studies of MMCs with such control systems. Simulations results comparing an EMT type MMC model with the complete SSTI system validate the proposed approach.

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Section: Fig 4 Energy Sum Controller (Phase J)mentioning

confidence: 99%

Section: Fig 4 Energy Sum Controller (Phase J)mentioning

confidence: 99%

See 1 more Smart Citation

State-space modelling with steady-state time invariant representation of energy based controllers for modular multilevel converters

Freytes

Bergna-Diaz

Suul

et al. 2017

2017 IEEE Manchester PowerTech

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show abstract

“…The continuous variant of EIM has been validated against laboratory prototypes in [110,126]. Similarly, the switching function and average models have been validated against detailed models or EIM in the literature [19,20,100,101,106,107].…”

Section: Model Validation In Literaturementioning

confidence: 99%

“…Based on the assumption of the identical construction of submodules and instantaneous voltage balance control, Refs. [20,101,106,107] represent all N submodules in an arm by an equivalent module. Despite their idealistic assumptions, these models inherently capture internally-stored energies and are suited for large signal analysis of the MMC.…”

Section: Average Modelmentioning

confidence: 99%

Modeling of MMC for Fast and Accurate Simulation of Electromagnetic Transients: A Review

Khan

Tedeschi

2017

Energies

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Over the past decade, modular multilevel converters have evolved as the preferred choice for high voltage conversion systems. The design of the converter poses a computational challenge to the classical electromagnetic transient simulation techniques, for which the existing literature proposes numerous simplified and computationally-efficient equivalent representations. Despite the extensive collection of proposed models, the literature lacks a systematic comparison of these representations, which could enable their appropriate selection based on the specific simulation objectives. In light of these requirements, this article presents a comprehensive review of MMC models and discusses their applicability for parallel and real-time simulation. Using PSCAD/EMTDC simulations, the models are objectively compared with regards to computational efficiency and accuracy for various transient conditions. In addition, the paper also presents a brief account of MMC operation and the associated control and modulation system.

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Small-signal state-space modeling of an HVDC link with modular multilevel converters

Freytes¹,

Akkari²,

Dai³

et al. 2016

2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL)

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Modular multilevel converter electrical circuit model for HVdc applications

Cited by 11 publications

References 8 publications

State-space modelling with steady-state time invariant representation of energy based controllers for modular multilevel converters

State-space modelling with steady-state time invariant representation of energy based controllers for modular multilevel converters

Modeling of MMC for Fast and Accurate Simulation of Electromagnetic Transients: A Review

Small-signal state-space modeling of an HVDC link with modular multilevel converters

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