Design considerations and performance evaluation of hybrid DC circuit breakers for HVDC grids

Peftitsis, Dimosthenis; Jehle, Andreas; Biela, J.

doi:10.1109/epe.2016.7695513

Cited by 14 publications

(4 citation statements)

References 8 publications

(11 reference statements)

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“…: Tech. XX(Y) 2016 (5) where i c0j is the DC component of the circulating current in phase j, v sj is the output voltage of phase j and φ ij is the phase angle of the output current vector in phase j. Usually, the DC component of the circulating current i c0j is controlled to exchange active power between the converter legs.…”

Section: Leg Energy Balancing Controllermentioning

confidence: 99%

“…As a result, many studies have focused on investigating the DC fault current characteristics [2,3] and the stages of the grid natural response to the fault [1]. Moreover, research has been conducted on the design of DC breakers [4,5], as well as on the design of different MMC submodules [6,7], as adaptations to the main half-bridge valve concept, to ride through a DC fault.…”

Section: Introductionmentioning

confidence: 99%

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Full-bridge MMC DC fault ride-through and STATCOM operation in multi-terminal HVDC grids

Kontos

Tsolaridis²,

Teodorescu³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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This paper investigates a control structure to enhance the DC fault ride-through capability of a full-bridge modular multilevel converter (MMC) station, while ensuring a stable controlled operation as a STATCOM during DC faults without the need for fault isolation. Taking advantage of the switching states of a full-bridge submodule, a DC current controller is proposed, which provides the DC voltage reference for the modulation when a DC fault is detected. By changing the outer controllers strategy from DC voltage or active power control to converter energy control during a fault, the decoupling of the converter operation from the DC side dynamics is realized. In this paper, the focus is on the control methodology at all times of operation and the evaluation of the STATCOM control during a fault. To this end, extensive simulations were performed on a three-terminal high voltage direct current (HVDC) grid in radial configuration and a pole-to-pole DC fault case was investigated. The results showed that the AC voltage and current were controlled within limits at all times, while the full-bridge MMC was able to provide reactive power support to the AC grid. Moreover, using the proposed control methodology, the transients at the operation transition points between STATCOM and inverter/rectifier operation were minimized and the stations were able to safely ride through the fault.

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Section: Leg Energy Balancing Controllermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Full-bridge MMC DC fault ride-through and STATCOM operation in multi-terminal HVDC grids

Kontos

Tsolaridis²,

Teodorescu³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The response speed of DC circuit breaker (DCCB) is more quickly, at the same time, only the MMC of the fault pole blocks and the DCCB is tripped [14], so the disturbance to the AC side will be less. This study adopts the method of tripping DCCB because this approach can insulate the DC fault, recovery the system rapidly, and has fewer disturbances to the AC side [15].…”

Section: Introductionmentioning

confidence: 99%

Improved active and reactive power control for symmetrical bipolar MMC‐HVDC systems during DC side PTG fault

Lin

et al. 2017

J. eng.

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“…For generating a zero current crossing in the MS several possibilities exist [6,7]. For example, some topologies use a load commutating switch (LCS) (typical semiconductors), which commutates the current to a parallel breaker branch consisting only of semiconductors [8,9] or capacitors [10].…”

Section: Introductionmentioning

confidence: 99%

Hybrid circuit breaker for HVDC grids with controllable pulse current shape

Jehle

Biela

2017

2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)

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In this paper, two new hCB concepts for DC-grids are presented, which use a pulse current to extinguish the arc in the mechanical switch after opening. Both concepts are capable to adjust the pulse current amplitude/waveform to the fault current amplitude and so generate a slow current slope di /dt directly before the zero current crossing without large passive components for a fast and reliable fault clearing. By improving the controllability of the hCB and with a new control concept the capacitor volume of the first concept could be reduced by 60% and the inductor volume by 88% compared to the existing solution. At the cost of more active components, the capacitor volume could be even more reduced by 98.4% compared to the first concept (99.4% compared to the existing solution).

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Design considerations and performance evaluation of hybrid DC circuit breakers for HVDC grids

Cited by 14 publications

References 8 publications

Full-bridge MMC DC fault ride-through and STATCOM operation in multi-terminal HVDC grids

Full-bridge MMC DC fault ride-through and STATCOM operation in multi-terminal HVDC grids

Improved active and reactive power control for symmetrical bipolar MMC‐HVDC systems during DC side PTG fault

Hybrid circuit breaker for HVDC grids with controllable pulse current shape

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