Circuit-breakers for medium-voltage DC grids

Heidemann, Matthias; Nikolic, Gregor; Schnettler, Armin; Qawasmi, Ala; Soltau, Nils; Donker, Rik W. De

doi:10.1109/tdc-la.2016.7914153

Cited by 12 publications

(13 citation statements)

References 9 publications

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“…Off-the-shelf DCCB for MVdc shipboard power systems and traction application are not suitable due to low fault current handling capabilities. In the family of DCCBs, solid-state circuit-breaker has the overall best performance with respect to technical and reliability parameters compared to different variants of mechanical and hybrid dc breakers [29]. However, ongoing efforts should be made to improve the DCCB technology for high-power MVdc grids.…”

Section: Existing Challenges and Perspectivesmentioning

confidence: 99%

A Review on MVdc Collection Systems for High-Power Offshore Wind Farms

Abeynayake

Liang

et al. 2019

2019 14th Conference on Industrial and Information Systems (ICIIS)

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Recently, offshore renewable technologies have shown a rapid growth with the advancement in technology together with reduction of capital investment per unit size. This movement is further catalyzed by various government policy decisions and new set targets on renewable energy (RE) production. Due to higher wind speed, limited land availability and flexibility of transporting very large structures (with the increased size of a single wind turbine) offshore wind power plants provide commendable benefits over onshore wind plants. At present, only medium voltage ac is used in the offshore wind collection systems. However, the use of medium voltage direct current (MVdc) at the collection level is becoming more attractive due to advantages like lower systems losses, zero reactive power compensation and flexibility of power flow control compared to traditional ac collection systems. This paper intends to review opportunities and key challenges associated with the emerging MVdc technology for offshore wind collection systems. Attention is given to the DC wind turbine concept and selecting a suitable MVdc collection system topology with appropriate control modes. Index Terms-Medium voltage dc (MVdc), offshore wind, wind power collection systems, dc wind turbine (dcWT), research challenges. I.

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Section: Existing Challenges and Perspectivesmentioning

confidence: 99%

A Review on MVdc Collection Systems for High-Power Offshore Wind Farms

Abeynayake

Liang

et al. 2019

2019 14th Conference on Industrial and Information Systems (ICIIS)

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“…Different DC CB concepts have been analysed concerning their suitability for MVDC application [4]. These circuit breakers (CBs) are: hybrid concepts based on a mechanical switch in the conducting path and a solid‐state device in parallel for turn off active) resonance concepts, where a current zero crossing is created for the utilisation of conventional AC CB or pure solid‐state devices. …”

Section: Realisation Options For Mvdc Distribution Networkmentioning

confidence: 99%

“…In total, three hybrid concepts [ snubbered mechanical CB (SMCB) , conventional hybrid CB and hybrid HVDC CB ], the active current injection CB and two solid‐state devices ( solid‐state DC CB (SSCB) and Z‐source CB ) are analysed in [4]. Each CB concept is evaluated concerning technical behaviour, reliability, acquisition costs and operating expenses, mainly due to losses.…”

Section: Realisation Options For Mvdc Distribution Networkmentioning

confidence: 99%

“…Next to a good reliability, the fast switching capabilities result in a fast turn off time and low current amplitudes. However, the solid‐state DC CBs have high losses, making the conventional hybrid CB and the SMCB promising concepts with a good overall performance [4]. Nevertheless, the switching times of these CBs vary significantly due to the presence or absence of mechanical components, resulting in different requirements for fault detection.…”

Section: Realisation Options For Mvdc Distribution Networkmentioning

confidence: 99%

“…Instead, MMCs with half‐bridge submodules (SMs) need CBs for fault clearing. Several DC CB concepts are presented for medium voltage application [4]. The usage of mechanical CBs causes longer switching times compared to solid‐state switches or breakers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Grid topology and technology influences on selective protection concepts for multi‐terminal medium voltage DC grids

Stumpe

Tünnerhoff

Schnettler

et al. 2018

J. eng.

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Recent trends and developments in protection systems for microgrids incorporating distributed generation

Ashraf,

Hasan,

Evkay

et al. 2024

WIREs Energy & Environment

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Microgrids are integral to power grids; they enhance grid reliability by integrating distributed generators (DGs) to fulfill the local load requirements, lowering energy generation costs, and providing eco‐friendly energy resources to reduce carbon emissions. Despite their benefits, new capabilities also introduce protection‐related complexities, including bidirectional power flow, varying fault currents, false tripping, relay reach limitations, coordination issues, and the requirement for proper grounding. This article offers a detailed review of protection issues in AC, DC, and hybrid AC–DC microgrids, investigating existing approaches to address these issues. Furthermore, the constraints and hurdles associated with these approaches and the future trends and intelligent approaches required to develop a reliable and efficient protection strategy are also identified in this article.This article is categorized under: Energy and Power Systems > Microgrids Energy and Power Systems > Distributed Generation

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Circuit-breakers for medium-voltage DC grids

Cited by 12 publications

References 9 publications

A Review on MVdc Collection Systems for High-Power Offshore Wind Farms

A Review on MVdc Collection Systems for High-Power Offshore Wind Farms

Grid topology and technology influences on selective protection concepts for multi‐terminal medium voltage DC grids

Recent trends and developments in protection systems for microgrids incorporating distributed generation

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