Validation of the continuous model of the modular multilevel converter with blocking/deblocking capability

Ahmed, Noman; Ängquist, Lennart; Norrga, Staffan; Nee, Hans‐Peter

doi:10.1049/cp.2012.1979

Cited by 42 publications

(30 citation statements)

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“…• Average arm SFM (AVM): This model incorporates the switching effect by utilizing a discrete set of values for the insertion index using module level modulation, which improves accuracy [22,23] Moreover, further simplified models for MMC have been proposed in the literature [19][20][21][22]31,[107][108][109][110][111][112][113][114][115][116][117][118]. The works in [19][20][21][22] extend the classical average modeling technique for 2/3-level converters [119] to MMC and represent its terminal dynamics using controlled sources; [107,[111][112][113][114]120] present enhanced versions of this model that incorporate the blocked state of operation for DC fault simulations and/or consider the effects of distributed submodule capacitor voltage ripple in MMC's terminal dynamics.…”

Section: Average Modelmentioning

confidence: 99%

“…The works in [17,20,109,[123][124][125] compare the detailed and EIM models under various transient cases. 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%

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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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Section: Average Modelmentioning

confidence: 99%

Section: Model Validation In Literaturementioning

confidence: 99%

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

Khan

Tedeschi

2017

Energies

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“…The HVDC grid test system is simulated using the continuous MMC model [8,9]. The model is based on the equivalent branch model of an arm of the MMC as shown in Fig.…”

Section: Converter Modelmentioning

confidence: 99%

“…For the HVDC grid test system, standard parameters based on currently existing technology are proposed. Furthermore, the test system, including a continuous modular multilevel converter (MMC) model [8,9] and a frequency-dependent cable model is implemented in EMT-type software, namely PSCAD [7,10]. This model can be used for electromagnetic transient studies of the dc power system, such as dc fault transient and protection studies or grid and converter dynamic studies.…”

Section: Introductionmentioning

confidence: 99%

A new HVDC grid test system for HVDC grid dynamics and protection studies in EMT-type software

Leterme

Ahmed²,

Beerten

et al. 2015

11th IET International Conference on AC and DC Power Transmission

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116

108

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This paper proposes a new HVDC grid test system for electromagnetic transient analysis, suitable for HVDC power system studies ranging from protection to dynamic studies investigating converter behaviour and interactions. In the recent past research interest in HVDC grids has increased, leading to a multitude of studies concerning dc power flow and optimal power flow, dynamics and HVDC grid protection. However, each of these studies makes use of different grid topologies, configurations and transmission line parameters. In this paper, a standard HVDC grid test system is proposed and an implementation in EMT-type software is provided. The implementation in EMT-type software makes use of a frequency dependent cable model, continuous converter model and a reduced dc breaker model. By means of a protection study, the effectiveness and computational efficiency of the proposed HVDC grid test system is demonstrated. The model with its parameters will be made publicly available.

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“…The neutral point is solidly grounded. The converters are presented by a continuous model with anti-parallel diodes to represent their IGBT blocking capability [22]. The cables are represented with a frequency-dependent distributed parameter model.…”

Section: A Hvdc Grid Componentsmentioning

confidence: 99%

A Fast Local Bus Current-Based Primary Relaying Algorithm for HVDC Grids

Azad

Hertem

2017

IEEE Trans. Power Delivery

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Abstract-This paper proposes a fast, selective, reliable and local bus primary relaying algorithm for high voltage direct current (HVDC) grids. The proposed relaying algorithm only uses measurements obtained from current sensors to detect faults and identify their locations. This algorithm is local and requires only communication at the bus level rather than system level. Furthermore, the algorithm is not sensitive to system configuration and operating point and can be employed during line or converter outages with limited re-tuning and adjustments.The proposed algorithm is applied to a four-terminal HVDC grid. Study results show that the proposed algorithm i) detects faults on both transmission lines and DC buses, ii) identifies the faulted bus or transmission line, iii) requires insignificant computation capacity, iv) distinguishes between faults and other system transients to prevent erroneous circuit breaker trips, and v) is not sensitive to measurement noise.

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Validation of the continuous model of the modular multilevel converter with blocking/deblocking capability

Cited by 42 publications

References 0 publications

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

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

A new HVDC grid test system for HVDC grid dynamics and protection studies in EMT-type software

A Fast Local Bus Current-Based Primary Relaying Algorithm for HVDC Grids

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