Research on the breaking branch for a hybrid DC circuit breaker in±500 kV voltage‐sourced converter high‐voltage direct current grid

Liu, Feng; Gou, Ruifeng; Zhuo, Fang; Yang, Xiaoping; Zhang, Fang

doi:10.1049/iet-pel.2020.0146

Cited by 17 publications

(6 citation statements)

References 20 publications

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“…7, the DC fault current reaches 12.3 kA in 10 ms after the DC fault. An engineering prototype of 500kV DCCB has been developed, and the experimental verification of ± 25kA fault current interrupting has been completed [9,27]. Thus, the DCCB is able to interrupt the DC fault current within 10 ms without blocking the MMC.…”

Section: Validation Of the Proposed Criteria On The First Test Systemmentioning

confidence: 99%

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Quantitative criteria of considering AC infeed in DC fault assessment of modular multilevel converters

Zhang

Qin

et al. 2022

International Journal of Electrical Power & Energy Systems

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Section: Validation Of the Proposed Criteria On The First Test Systemmentioning

confidence: 99%

“…According to (27), idc(t) reaches the maximum when ω 1 t=arctan(K) and the maximum value is √ 1+K 2 . Combined with (26), the maximum value of σ 2 satisfies…”

mentioning

confidence: 99%

Quantitative criteria of considering AC infeed in DC fault assessment of modular multilevel converters

Zhang

Qin

et al. 2022

International Journal of Electrical Power & Energy Systems

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“…Augustin, M. Becerra, and H.-P. Nee are with KTH Royal Institute of Technology, Teknikringen 33, 10044 Stockholm, Sweden (e-mail: timau@kth.se; marley@kth.se; hansi@kth.se). interrupt the DC [11]- [20]. Hybrid DCCBs have substantially lower on-state losses than solid-state DCCBs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Enhanced Active Resonant DC Circuit Breakers

Augustin

Becerra²,

Nee

2022

IEEE Trans. Power Electron.

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Enhanced active resonant (EAR) DC circuit breakers (DCCBs) are a novel type of DCCB that use a discharge closing switch as interruption medium. A technical limitation of discharge closing switches is the minimum voltage across the main gap required for successful triggering. A novel commutation process creating the minimum voltage internally is proposed, which allows to simplify the EAR DCCB configuration and to reduce its component count. In the prototype, the discharge closing switch is implemented with a triggered vacuum gap. Experiments show that the triggered vacuum gap can be triggered reliably down to a voltage of 50 V and that the discharge in the triggered vacuum gap is highly oscillatory at low current. The originally proposed EAR DCCB configuration has to be tuned such that the commutation to the triggered vacuum gap succeeds at low current. Conversely, the novel commutation process decouples the minimum voltage from the current level by adjusting the triggering delay. This allows reliable commutation irrespective of the operating conditions. It is shown that the novel commutation process does not adversely affect DC interruption. Proactive commutation operation and auto-reclosing strategies are demonstrated.

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“…This structure has been used for the Zhangbei 500kV/25kA HCB, the world's largest capacity HVDC circuit breaker [7]. Currently, most HCB system is designed for the HVDC application, which focuses on the conduction loss, manufacturing cost, current interruption capability and maintenance convenience [8]. However, in the MV range, the power density is also an important factor to shrink the size and volume.…”

Section: Introductionmentioning

confidence: 99%

High Power Density Design of Power Electronic Interrupter in Hybrid DC Circuit Breaker

Liu

Ravi

Dong

et al. 2021

2021 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Circuit protection is a key enabler for future medium-voltage direct-current (MVDC) distribution systems. Hybrid dc circuit breaker (HCB) offers low conduction losses and reasonably fast response times, but suffers from large size. In this paper, a high power density power electronic interrupter design is introduced for the HCB. The device selection and tradeoff analysis of voltage clamping circuit are investigated. A small sized module with two parallel 1.7 kV discrete IGBTs are selected as main switches. The RC snubber and MOV are carefully designed to guarantee no tail current bump and sufficient turn-off voltage margin. Experimental results at 12 kV and 1 kA are provided to verify the operation of the prototype.

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Research on the breaking branch for a hybrid DC circuit breaker in±500 kV voltage‐sourced converter high‐voltage direct current grid

Cited by 17 publications

References 20 publications

Quantitative criteria of considering AC infeed in DC fault assessment of modular multilevel converters

Quantitative criteria of considering AC infeed in DC fault assessment of modular multilevel converters

Experimental Study of Enhanced Active Resonant DC Circuit Breakers

High Power Density Design of Power Electronic Interrupter in Hybrid DC Circuit Breaker

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