The South-West Scheme: a new HVAC and HVDC transmission system in Sweden

Ingemansson, Dag; Wheeler, Joy; MacLeod, Norman; Gallon, F; Ruiton, O

doi:10.1049/cp.2012.1943

Cited by 16 publications

(8 citation statements)

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“…The use of a specific type per project is dependent on the HVDC link terrain, and influenced by adopted policies and regulations. [143]. Cables are also not exposed to transient faults induced by lightning or ambient environment condition as compared to OH lines, thus providing more operational reliability [144].…”

Section: Transmission Assetsmentioning

confidence: 99%

HVDC Transmission: Technology Review, Market Trends and Future Outlook

Alassi

Bañales

Ellabban

et al. 2019

Renewable and Sustainable Energy Reviews

277

104

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HVDC systems are playing an increasingly significant role in energy transmission due to their technical and economic superiority over HVAC systems for long distance transmission. HVDC is preferable beyond 300-800 km for overhead point-to-point transmission projects and for the cable based interconnection or the grid integration of remote offshore wind farms beyond 50-100 km. Several HVDC review papers exist in literature but often focus on specific geographic locations or system components. In contrast, this paper presents a detailed, up-to-date, analysis and assessment of HVDC transmission systems on a global scale, targeting expert and general audience alike. The paper covers the following aspects: technical and economic comparison of HVAC and HVDC systems; investigation of international HVDC market size, conditions, geographic sparsity of the technology adoption, as well as the main suppliers landscape; and high-level comparisons and analysis of HVDC system components such as Voltage Source Converters (VSCs) and Line Commutated Converters (LCCs), etc. The presented analysis are supported by practical case studies from existing projects in an effort to reveal the complex technical and economic considerations, factors and rationale involved in the evaluation and selection of transmission system technology for a given project. The contemporary operational challenges such as the ownership of Multi-Terminal DC (MTDC) networks are also discussed. Subsequently, the required development factors, both technically and regulatory, for proper MTDC networks operation are highlighted, including a future outlook of different HVDC system components. Collectively, the role of HVDC transmission in achieving national renewable energy targets in light of the Paris agreement commitments is highlighted with relevant examples of potential HVDC corridors.

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Section: Transmission Assetsmentioning

confidence: 99%

HVDC Transmission: Technology Review, Market Trends and Future Outlook

Alassi

Bañales

Ellabban

et al. 2019

Renewable and Sustainable Energy Reviews

277

104

View full text Add to dashboard Cite

show abstract

“…In Germany, precedence has been given to power cables over OHLs for new HVDC onshore corridors by law [11]. Further examples for mixed transmission topologies can be found worldwide [16, 17]. To guarantee high system availability, fault clearing strategies in these systems should incorporate automatic re‐energisation procedures, since most OHL faults are temporary [12, 18].…”

Section: Next Generation Vsc‐mmc Systemsmentioning

confidence: 99%

Power cable stresses caused by transmission line faults in next generation VSC‐MMC systems

Tünnerhoff

Ruffing

Puffer

2019

J. eng.

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“…Another four-terminal dc grid pilot project interconnecting Beijing and Zhangjiakou will be commissioned in 2018 [3]. In Europe, several HVDC grid topologies have been proposed to represent the building blocks of a future pan-European grid [4], [5]. Other notable VSC-based multi-terminal system projects include the Tres Amigas Superstation and the Atlantic Wind Connection, which are still under construction [6].…”

Section: Introductionmentioning

confidence: 99%

Coordination of MMCs With Hybrid DC Circuit Breakers for HVDC Grid Protection

Wang

Adeuyi

et al. 2019

IEEE Trans. Power Delivery

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A high-voltage direct-current (HVDC) grid protection strategy to suppress dc fault currents and prevent overcurrent in the arms of modular multilevel converters (MMCs) is proposed in this paper. The strategy is based on the coordination of half-bridge MMCs and hybrid dc circuit breakers (DCCBs). This is achieved by allowing MMC submodules to be temporarily bypassed prior to the opening of the DCCBs. Once the fault is isolated by the DCCBs, the MMCs will restore to normal operation. The performance of the proposed method is assessed and compared to when MMCs are blocked and when no corrective action is taken. To achieve this, an algorithm for fault detection and discrimination is used and its impact on MMC bypassing is discussed. To assess its effectiveness, the proposed algorithm is demonstrated in PSCAD/EMTDC using a four-terminal HVDC system. Simulation results show that the coordination of MMCs and DCCBs can significantly reduce dc fault current and the absorbed current energy by more than 70% and 90%, respectively, while keeping MMC arm currents small.

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The South-West Scheme: a new HVAC and HVDC transmission system in Sweden

Cited by 16 publications

References 0 publications

HVDC Transmission: Technology Review, Market Trends and Future Outlook

HVDC Transmission: Technology Review, Market Trends and Future Outlook

Power cable stresses caused by transmission line faults in next generation VSC‐MMC systems

Coordination of MMCs With Hybrid DC Circuit Breakers for HVDC Grid Protection

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