Integration of small taps into (existing) HVDC links

Bahram, M.; Baker, M.H.; Bowles, J. P.; Bunch, Ryan; Lemay, J.; Long, W.F.; McConnach, J.; Menzies, R.W.; Reeve, J.; Szechtman, M.

doi:10.1109/61.400959

Cited by 48 publications

(16 citation statements)

References 6 publications

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“…In [17] the author mentions series tapping using energy storage units. A tap using energy storage units will be able to operate during low current conditions.…”

Section: B Energy Storagementioning

confidence: 98%

An investigation into series power tapping options of HVDC transmission lines

Hartshorne

Mouton

Madawala

2013

2013 1st International Future Energy Electronics Conference (IFEEC)

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The first commercial success in HVDe transmission was made in 1954 and it has since become popular as attempts have also been made to tap energy from the HVDe line itself. This paper discusses technical issues that are related to series energy tapping options for HVDe lines, with possible solutions. The performance and behavior of four different design options for a 2 MW series tap are investigated through simulations. Results are presented with comparisons, highlighting the key characteristics of each design, as proof of concept and as well as to demonstrate that series power tapping from HVDe lines is viable.

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“…In [17] the author mentions series tapping using energy storage units. A tap using energy storage units will be able to operate during low current conditions.…”

Section: B Energy Storagementioning

confidence: 98%

An investigation into series power tapping options of HVDC transmission lines

Hartshorne

Mouton

Madawala

2013

2013 1st International Future Energy Electronics Conference (IFEEC)

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“…Taps can be split into either series or parallel connected arrangements [8][9]. Series taps are directly integrated into the line and therefore have to be able to withstand the full current rating of the line.…”

Section: The Hvdc Tapmentioning

confidence: 99%

“…En-route connections from the link to local loads or generators are not necessarily rated at the full link power. Such partial power connections are referred to as HVDC taps and are typically rated at 1-10 % of the link's capacity [8]. This paper presents four architectures of DC/DC converters for use in HVDC VSC taps.…”

Section: Introduction To Hvdc Transmissionmentioning

confidence: 99%

Modular multilevel DC/DC converter architectures for HVDC taps

Luth

Merlin

Green

2014

2014 16th European Conference on Power Electronics and Applications

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DC/DC connections between DC voltage levels in High Voltage Direct Current (HVDC) schemes are useful for interconnection between links and as taps to inject/extract relatively small amounts of power. Taps with high voltage transformation ratios (such as 500 kV to 50 kV) are particularly challenging to achieve with reasonable use of semiconductor ratings. Four architectures of DC/DC converter covering both direct connection and transformer-interfaced are analysed and compared in terms of the ratio of their apparent power rating (rated current times rated current summed across all stacks of the cells) to the throughput power. It is found that the direct conversion architectures have reasonable power capacity factor only for low transformation ratios (of 2:1 or less) but the inclusion of a transformer and intermediate square-wave operation allows much wider transformation ratios with a reasonable power capacity factor. For each design the nature of the cell-balancing currents has been determined since this is a major factor in determining the total current flow in each cell stack.

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“…The proposed HVDC taps in literature can be separated into two categories: series and parallel taps [3]. A series tap inserts a DC voltage in-line with HVDC transmission line.…”

Section: Introductionmentioning

confidence: 99%

A Novel Multi-Modular Series HVDC Tap

Tang¹,

Watson²,

Wheeler³

et al. 2017

13th IET International Conference on AC and DC Power Transmission (ACDC 2017)

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Tapping energy from a HVDC transmission line to serve small remote communities has been considered by researchers and HVDC manufacturers since the 1960s. Many HVDC taps proposed consider the performance of diodes, Thyristors and GTOs and the utilization of bulky and expensive high voltage transformers. This paper proposes a novel HVDC tap topology, the n-phase multi-modular series tap (MMST), which utilises capacitors to decouple HV voltage and IGBT H-bridge sub-modules typically found in modular multilevel converters to transfer HVDC to MVAC. The number of phases and operating frequency can be picked according to the requirement of the application. The feasibility of n-phase MMST has been verified by the results from simulation carried out in PLECS software.

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Integration of small taps into (existing) HVDC links

Cited by 48 publications

References 6 publications

An investigation into series power tapping options of HVDC transmission lines

An investigation into series power tapping options of HVDC transmission lines

Modular multilevel DC/DC converter architectures for HVDC taps

A Novel Multi-Modular Series HVDC Tap

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