Comparison of Detailed Modeling Techniques for MMC Employed on VSC-HVDC Schemes

Beddard, Antony; Barnes, Mike; Preece, Robin

doi:10.1109/tpwrd.2014.2325065

Cited by 102 publications

(69 citation statements)

References 10 publications

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“…This model allows to access each individual SM voltage providing enough accuracy compared to a fully-detailed model [21]. Each sub-module is represented by its equivalent capacitor that is charged and discharged depending on its insertion state.…”

Section: A Simulation Model Descriptionmentioning

confidence: 99%

Control of Modular Multilevel Converters Under Singular Unbalanced Voltage Conditions With Equal Positive and Negative Sequence Components

Prieto‐Araujo

Junyent-Ferré

Clariana-Colet³

et al. 2017

IEEE Trans. Power Syst.

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Abstract-This article focuses on the control of Modular Multilevel Converters (MMC) for High Voltage DC (HVDC) applications during unbalanced AC grid voltage sags where positive and negative sequence voltages are equal. The control scheme is based on six arm energy regulators, six independent current controllers and two reference calculation stages that convert the power references into grid and inner current references. Conventional inner AC currents reference calculation fails if the amplitude of the positive and the negative sequence AC grid voltages are equal, a state which is referred to in this paper as singular voltage condition. This article discusses the types of network faults that cause this condition and proposes three different solutions to operate the converter in such scenarios. The adequacy of the proposed solutions is validated through simulations considering each of the problematic fault scenarios.

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Section: A Simulation Model Descriptionmentioning

confidence: 99%

Control of Modular Multilevel Converters Under Singular Unbalanced Voltage Conditions With Equal Positive and Negative Sequence Components

Prieto‐Araujo

Junyent-Ferré

Clariana-Colet³

et al. 2017

IEEE Trans. Power Syst.

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“…There are many techniques for modelling a HB-MMC [5,6]. Average Value Models (AVMs) are used to represent the HBMMCs for this work since their accuracy is sufficient for the studies being conducted and they are significantly more computationally efficient than the more detailed models [5].…”

Section: A Voltage Source Convertermentioning

confidence: 99%

HVDC grid control system based on autonomous converter control

Barnes¹,

Beddard²,

Barker³

et al. 2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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In this paper, the main layers of a HVDC control architecture based on autonomous converter control have been implemented and a range of tests have been conducted to assess the system's steady-state and transient performance.The simulation results show that the control system is able to accurately control DC power flow in steady-state and to maintain grid stability for fast transient events without exceeding the dynamic operating limits.

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“…In terms of the MMC modelling, different types of MMC model have been proposed in [23][24][25]. Notably are the Accelerated Model (AM), Detailed Equivalent Model (DEM) and Traditional Detailed Model (TDM).…”

Section: Modellingmentioning

confidence: 99%

“…Notably are the Accelerated Model (AM), Detailed Equivalent Model (DEM) and Traditional Detailed Model (TDM). In this paper, the DEM is used for the MMC modelling, as the DEM can provide identical system response when compared to the TDM, but takes less time to run and the DEM can give more accurate simulation results than the AM [25]. In this paper, in the implemented MMC model, there are 30 sub-modules in each phase arm which could provide 31 voltage levels.…”

Section: Modellingmentioning

confidence: 99%

Impact of Fault Current Limiter on VSC-HVDC DC Protection

Chang¹,

Cwikowski²,

Pei³

et al. 2016

12th IET International Conference on AC and DC Power Transmission (ACDC 2016)

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Multi-terminal Voltage-Sourced Converter (VSC) High Voltage Direct Current (HVDC) transmission is expected to play a key role in future power transmission grids. Compared with AC transmission, DC transmission is more vulnerable to faults due to the lower DC side impedances and sensitive power electronics used in the converters. DC protection issues must be solved before any multi-terminal VSC-HVDC grid can be established. In terms of DC protection, apart from using a DC circuit breaker to interrupt and isolate a DC fault, a Fault Current Limiter (FCL) may be employed to limit the fault current. FCLs could potentially form an important part of any future DC protection system. This paper investigates such a FCL. The main contribution of this paper is that, the resistive type superconducting FCL (SCFCL) is modelled in detail to perform DC protection with the ABB hybrid circuit breaker, in a high fidelity four-terminal VSC-HVDC system model. The simulation results show that the SCFCL has great potential to be employed for DC protection.

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Comparison of Detailed Modeling Techniques for MMC Employed on VSC-HVDC Schemes

Cited by 102 publications

References 10 publications

Control of Modular Multilevel Converters Under Singular Unbalanced Voltage Conditions With Equal Positive and Negative Sequence Components

Control of Modular Multilevel Converters Under Singular Unbalanced Voltage Conditions With Equal Positive and Negative Sequence Components

HVDC grid control system based on autonomous converter control

Impact of Fault Current Limiter on VSC-HVDC DC Protection

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