Design and numerical investigation of A HVDC vacuum switch based on artificial current zero

Shi, Zenan; Zhang, Y. K.; Jia, Shenli; Song, Xiaochuan; Wang, L. J.; Chen, M.

doi:10.1109/tdei.2014.004533

Cited by 87 publications

(26 citation statements)

References 12 publications

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“…First, the capacitor in the RC branch, whose capacitance is much higher than the stray capacitance of the VI, can uniformly distribute the transient recovery voltage across the break of each interruption. Second, the resistor in the RC branch can dampen the high-frequency oscillations in the transient recovery voltage, and can consequently suppress the rising rate of the transient recovery voltage [11].…”

Section: Interrupion Scheme and Simulation Modelmentioning

confidence: 99%

“…To reduce the size and cost of the forced-commutation branch, a high frequency is usually selected for the commutation branch. However, this condition is unfavorable for the recovery of dielectric strength, as well as for the thermal interruption capability of the VI after current zero [11]. Thus, an optimal design for the forced-commutation branch is important.…”

Section: Introductionmentioning

confidence: 99%

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Direct-Current Forced Interruption and Breaking Performance of Spiral-Type Contacts in Aero Applications

Huo

Jia

et al. 2017

Applied Sciences

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This paper analyses the transient characteristics and breaking performance of direct-current (DC) forced-interruption vacuum interrupters in 270 V power-supply systems. Three stages are identified in forced interruption: the DC-arcing stage, current-commutation stage, and voltage-recovery stage. During the current-commutation stage, the reverse peak-current coefficient k, which is a key design factor, is used to calculate the rate of current at zero-crossing (di/dt). MATLAB/Simulink simulation models are established to obtain the transient characteristics influenced by the forced-commutation branch parameters and the coefficient k. To study the breaking performance of spiral-type contacts, experiments are conducted for different contact materials and arcing times for currents less than 3.5 kA. During the DC-arcing stage, a locally intensive burning arc is observed in the CuW80 contact; however, it is not observed in the CuCr50 contact. On examining the re-ignition interruption results of the CuW80 contact, the intensive burning arc is found to be positioned within a possible re-ignition region. When the arcing time is longer than 1 ms, the intensive burning arc occurs and affects the breaking performance of the spiral-type contacts. If the DC-arcing stage is prolonged, the total arcing energy increases, which leads to a lower breaking capacity.

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Section: Interrupion Scheme and Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct-Current Forced Interruption and Breaking Performance of Spiral-Type Contacts in Aero Applications

Huo

Jia

et al. 2017

Applied Sciences

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“…To accelerate the operation speed of the interrupter, an electromagnetic actuator is introduced. References [5]- [6] demonstrated active resonant mechanical DCCBs driven by electromagnetic actuator that can interrupt dc fault current of up to 16kA within 5ms. However, it might be technologically challenging to achieve fast auto-reclose within 200-500ms [7] for mechanical DCCBs since the capacitors need to be recharged.…”

Section: Introductionmentioning

confidence: 99%

A novel HVDC circuit breaker for HVDC application

Zhou

Xiang

Zuo

et al. 2019

International Journal of Electrical Power & Energy Systems

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Hybrid high voltage direct current circuit breakers (DCCBs) are capable of interrupting fault current within a few milliseconds, but this technology has high capital cost, especially in a meshed HVDC grid. To increase the economic competitiveness of hybrid DCCBs, this paper proposes a capacitor commutated dc circuit breaker (CCCB). The CCCB mainly comprises an auxiliary branch with a fast dis-connector in series with semiconductor devices and the main branch with the series connection of a dc capacitor and diode valves. This paper provides a detailed depiction of the CCCB. The topology and operating principles are discussed. The impact of snubber circuits and stray inductances on the commutation process is analyzed. The general sizing method for the main components in the CCCB is detailed. Reclosing to transmission lines with different operating conditions is studied. Several extended topologies are proposed to further reduce the semiconductor cost and on-state operation power loss. The power loss and cost of CCCB are assessed. Extensive simulations on PSCAD/EMTDC verified the dc fault isolation and reclosing of the CCCB.

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“…High voltage DC Circuit Breakers have recently been developed and prototype tested at voltages around 100kV [4]- [7]. There are three main groups of DC CB: mechanical DC CBs [8], [9] which have operating time of around 7-10 ms, IGBT-based hybrid DC CBs [4] with operating time around 2-3 ms, and thyristor based hybrid DC CBs [6], [10], [11] which operate within 2-5 ms.…”

Section: Introductionmentioning

confidence: 99%

Design, Modeling and Control of Hybrid DC Circuit Breaker Based on Fast Thyristors

Far

Jovcic

2018

IEEE Trans. Power Delivery

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This paper presents a systematic study on designing hybrid direct current (DC) circuit breaker (CB) based on fast thyristors. As an illustration, the DC CB main parameters are calculated for a 120kV, 1.5kA test breaker with interrupting current of 10kA. The studies indicate that the opening time of 2.3ms can be achieved only if fast thyristors are employed. It is further illustrated that there is a design tradeoff between minimum interrupting current capability and discharge time for the internal capacitors (reclosing speed). The DC CB control system for opening and closing is presented based on different levels of protection and the self-protection. The DC CB is modelled in PSCAD and simulation results are used to evaluate the breaker performance under different operating conditions. It is concluded that the model represents well the DC CB and can be employed for DC grid protection studies. It is further shown that opening time becomes longer as interrupting current reduces, and it is very long in case of load current interruption.

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Design and numerical investigation of A HVDC vacuum switch based on artificial current zero

Cited by 87 publications

References 12 publications

Direct-Current Forced Interruption and Breaking Performance of Spiral-Type Contacts in Aero Applications

Direct-Current Forced Interruption and Breaking Performance of Spiral-Type Contacts in Aero Applications

A novel HVDC circuit breaker for HVDC application

Design, Modeling and Control of Hybrid DC Circuit Breaker Based on Fast Thyristors

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