MMC control optimization approach to facilitate DC-side interoperability in MTDC networks

Loku, Fisnik; Quester, Matthias; Brantl, Christina; Monti, Antonello

doi:10.1016/j.epsr.2021.107639

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…[30][31][32]). The control tuning of both structures is mostly oriented at steadystate operation and stability in dynamic events (refer to [28,33,34]), but the control implementation might also affect the transient DC fault behaviour. Especially the DC-side parts of the control system, that is, DC voltage and current controls, are expected to have an influence during DC-side events, and are therefore focussed in the following.…”

Section: Controls: Steady State and Fault Reactionmentioning

confidence: 99%

Interdependencies in HVDC grid protection: Impact of converter parameters and controls on DC fault‐ride‐through capabilities and protection system design

Düllmann

Brantl

Klein

et al. 2023

IET Generation Trans & Dist

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For future multi-terminal HVDC networks, protection systems based on DC circuit breakers (DCCBs) are envisioned to limit the loss of power transmission towards AC grid(s). Yet, HVDC protection system design is considered a major challenge-especially in a multi-vendor setup. In particular, protection systems shall enable HVDC converters to ride through DC faults without protective blocking. Several studies have performed sensitivity analyses to determine the DCCB properties and current-limiting inductor properties that are required to enable converter fault-ride-through (FRT), but the HVDC converters themselves have been simplified and kept identical. However, in a multi-vendor setup, the exact converter design is not known at the time of DC protection planning. Therefore, this paper investigates the impact of different converter properties on the DC-FRT behaviour, and reveals implications on HVDC protection design. Firstly, analytical approaches are proposed to mathematically derive potential impact factors on the converters' FRT characteristics, also considering different converter control architectures. Secondly, a comprehensive EMT study demonstrates a significant impact of the converter parameters on the FRT behaviour. Analytical approaches and EMT results are compared with regard to limitations and applicability, such that the paper's findings can support the development of functional requirements for multi-vendor multi-terminal HVDC networks.

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Section: Controls: Steady State and Fault Reactionmentioning

confidence: 99%

Interdependencies in HVDC grid protection: Impact of converter parameters and controls on DC fault‐ride‐through capabilities and protection system design

Düllmann

Brantl

Klein

et al. 2023

IET Generation Trans & Dist

Self Cite

View full text Add to dashboard Cite

show abstract

“…Methodologies to identify and mitigate control interactions have been developed and investigated in the literature [18], [30], [34]. Analyzing the stability of internal converter control loops in the control design stage serves a useful purpose as it attempts to ensure that harmonic instabilities do not occur due to incorrect tuning of the inner control loops [35], [36]. Nevertheless, harmonic stability can mainly be evaluated analytically if full knowledge of the control system is rendered.…”

Section: Control System Partitioningmentioning

confidence: 99%

DC-Side Impedance Estimation of a Modular Multilevel Converter Through System Identification of a Partially Black-Boxed Control System

Nahalparvari

Asoodar

Jahn

et al. 2022

IEEE Trans. Energy Convers.

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MMC control optimization approach to facilitate DC-side interoperability in MTDC networks

Cited by 2 publications

References 14 publications

Interdependencies in HVDC grid protection: Impact of converter parameters and controls on DC fault‐ride‐through capabilities and protection system design

Interdependencies in HVDC grid protection: Impact of converter parameters and controls on DC fault‐ride‐through capabilities and protection system design

DC-Side Impedance Estimation of a Modular Multilevel Converter Through System Identification of a Partially Black-Boxed Control System

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