Virtual Capacitor Concept for Computationally Efficient and Flexible Real-Time MMC Model

Milovanović, Stefan; Luo, Min; Dujić, Dražen

doi:10.1109/access.2021.3121351

Cited by 5 publications

(5 citation statements)

References 33 publications

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“…The capacitor's effects on the waveforms are modelled in a way their charge is function of stored energy and arm current. A similar approach has been adopted in [28] aiming a Real-Time implementation. This work focusses solely on the DC grid related aspects and the impact of connecting numerous SSTs with symmetric and asymmetric loadings.…”

Section: Considerations On Modelling MMC and Ac Connectionmentioning

confidence: 99%

Continuous Time Simulation and System Level Control Model of a Modern MVDC Distribution Grid including SST and MMC Based AFE

Siemaszko,

Carpita

2024

Preprint

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The medium-voltage DC (MVDC) technology has gained increasing interests in recent years. Power electronics devices dominate those grids. Accurate simulation of such a grid, with detailed models of switching semiconductors, can quickly became very time-consuming, according to the number of connected devices to be simulated. A simulation approach based on interactions on a continuous time model can be very interesting, especially for developing a system level control model of such a modern MVDC distribution grid. Aim of this paper is to present all the steps required for obtaining a continuous time modelling of a +/- 10 kV MVDC grid case study, including Solid State Transformer (SST) and Modular Multilevel Converter (MMC) based Active Front End (AFE). Additional aim of this paper is to supply an educational content about the use of the continuous time simulation approach, thanks to a detailed description of the various devices modelled into the presented MVDC grid. The results of a certain number of simulation scenarios are eventually presented.

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Section: Considerations On Modelling MMC and Ac Connectionmentioning

confidence: 99%

Continuous Time Simulation and System Level Control Model of a Modern MVDC Distribution Grid including SST and MMC Based AFE

Siemaszko,

Carpita

2024

Preprint

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“…The capacitor's effects on the waveforms are modelled in a way that their charge is a function of stored energy and arm current. A similar approach has been adopted in [32], aiming for real-time implementation. This work focusses solely on the DC grid-related aspects and the impact of conn ing numerous SSTs with symmetric and asymmetric loadings.…”

Section: Considerations On Modelling MMC and Ac Connectionmentioning

confidence: 99%

Continuous Time Simulation and System-Level Model of a MVDC Distribution Grid Including SST and MMC-Based AFE

Siemaszko,

Carpita

2024

Electronics

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Medium-voltage DC (MVDC) technology has gained increasing attention in recent years. Power electronics devices dominate these grids. Accurate simulation of such a grid, with detailed models of switching semiconductors, can quickly became very time-consuming, according to the number of connected devices to be simulated. A simulation approach based on interactions on a continuous time model can be very interesting, especially for developing a system-level control model of such a modern MVDC distribution grid. The aim of this paper is to present all the steps required for obtaining a continuous time modelling of a +/−10 kV MVDC grid case study, including a solid-state transformer (SST)- and modular multilevel converter (MMC)-based active front end (AFE). An additional aim of this paper is to supply educational content about the use of the continuous time simulation approach, thanks to a detailed description of the various devices modelled into the presented MVDC grid. The results of a certain number of simulation scenarios are eventually presented.

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“…The schematics of the HIL platform that is used in this paper is shown in Fig. 2 and is based on the interconnection of 10 RT Boxes to model the M3C, but shares the same control hardware as the setup used for IMMC described in [13] and [21]. One RT Box, hosting the input ac grid as well as the ac output application (ac machine or ac grid), will be referred to as Application RT Box.…”

Section: Description Of the Real-time Hil Systemmentioning

confidence: 99%

“…Where L Σx = L x + L br 3 for the equivalent circuit seen from the input ac side, and L Σy = L y + L br 3 for the equivalent circuit seen from the output ac side. Equations ( 16) to (21) are equivalent as the equations from the initial model seen in Fig. 6, thus this initial model can be interchanged with the one from Fig.…”

Section: Splitting Of the M3c Modelmentioning

confidence: 99%

Distributed Real-Time Model of the M3C for HIL Systems Using Small-Scale Simulators

Bontemps¹,

Milovanović²,

Dujić³

2021

IEEE Open J. Power Electron.

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Hardware-in-the-loop systems are an essential tool to verify controllers and deployed control algorithms in a risk-free environment. The inaccessibility of the converters used in applications such as pumped hydro storage power plants due to their high ratings, require the development of a hardware-in-the-loop platform to perform the validation of the deployed control structures and algorithms. This paper presents the modeling and splitting of the model of the matrix modular multilevel converter to allow the usage of small-scale simulators, such as the RT Boxes, to deal with the complex system exceeding capabilities of a single unit. To achieve an acceptable simulation step-size, this paper demonstrates the splitting of the model into multiple independent instances using the concept of virtual capacitance implementation. The verification of the proposed concept is done on a hardware-in-the-loop system compromising ten RT Boxes, where the physical model of the matrix modular multilevel converter is deployed, and control algorithms are implemented on the ABB PEC800 industrial controllers.

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Virtual Capacitor Concept for Computationally Efficient and Flexible Real-Time MMC Model

Cited by 5 publications

References 33 publications

Continuous Time Simulation and System Level Control Model of a Modern MVDC Distribution Grid including SST and MMC Based AFE

Continuous Time Simulation and System Level Control Model of a Modern MVDC Distribution Grid including SST and MMC Based AFE

Continuous Time Simulation and System-Level Model of a MVDC Distribution Grid Including SST and MMC-Based AFE

Distributed Real-Time Model of the M3C for HIL Systems Using Small-Scale Simulators

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