Design of a bi-directional 600 V/6 kA ZVS hybrid DC switch using IGBTs

Polman, H.; Ferreira, J.A.; Kaanders, M.; Evenblij, B.H.; Gelder, P. van

doi:10.1109/ias.2001.955596

Cited by 24 publications

(20 citation statements)

References 6 publications

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“…(b), adding impedance will result in an increase in the duration of vacuum arc commutation. However, an increase in the duration of vacuum arc commutation leads to an increase in arcing time and may result in an increase in the interruption time , and the excessive arcing time and increase of interruption time are not conducive to DC interruption . Therefore, the duration of vacuum arc commutation should not be too long to reduce or avoid the impact on arcing and interruption times.…”

Section: Discussionmentioning

confidence: 99%

“…The parameters in Formula (9) are simplified as shown in Formula (10), where the values of the parameters k and x R satisfy Formula (8): Fig. 4.…”

Section: Analysis On Effect Of Adding Impedance On Vacuum Arc Commutamentioning

confidence: 99%

“…Therefore, if parallel‐connected IGBTs adopt a method of adding impedance for current balancing, it will not increase power loss. Meanwhile, the low‐voltage DC hybrid circuit breaker designed in previous studies was also accompanied by a proposal to include a method of adding impedance for current balancing. Therefore, considering the operating characteristics of a DC MHCB, adding impedance has obvious advantages compared with other current‐balancing methods.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of adding impedance for current balancing on the vacuum arc commutation characteristics of DC microgrid hybrid circuit breakers

Liao

Wang

Leng

et al. 2020

IEEJ Transactions Elec Engng

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To achieve current balance between parallel‐connected insulated gate bipolar transistors (IGBTs) of a DC microgrid hybrid circuit breaker (DC MHCB), it is a simple and effective method to add impedance in parallel‐connected IGBTs, but this will also affect the vacuum arc commutation of the DC MHCB. The focus of this paper is the effects of adding impedance on vacuum arc commutation characteristics. By constructing a simplified model of vacuum arc commutation in the case of adding impedance, the effect of adding impedance on vacuum arc commutation is theoretically derived. The test circuit of vacuum arc commutation is established, and the effect of adding impedance on vacuum arc commutation in the presence or absence of the externally applied transverse magnetic field (TMF) is investigated using the electrical measure. The theoretical formula and related formulas of the effect of adding impedance on the duration of vacuum arc commutation are obtained. A method combining adding impedance and an externally applied TMF is proposed. The constraint formula for adding impedance during vacuum arc commutation is obtained. The main factors that limit the value of adding impedance are obtained. Research on the effect of adding impedance on vacuum arc commutation characteristics can provide theoretical guidance for the application of the method of adding impedance in a DC MHCB. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Discussionmentioning

confidence: 99%

“…The parameters in Formula (9) are simplified as shown in Formula (10), where the values of the parameters k and x R satisfy Formula (8): Fig. 4.…”

Section: Analysis On Effect Of Adding Impedance On Vacuum Arc Commutamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of adding impedance for current balancing on the vacuum arc commutation characteristics of DC microgrid hybrid circuit breakers

Liao

Wang

Leng

et al. 2020

IEEJ Transactions Elec Engng

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“…That is, both have respective advantages and weaknesses. A number of studies were done recently on hybrid dc switches in which the mentioned devices are connected in parallel to reduce power loss during conduction, while supporting high‐speed interruption …”

Section: Introductionmentioning

confidence: 99%

“…A number of studies were done recently on hybrid dc switches in which the mentioned devices are connected in parallel to reduce power loss during conduction, while supporting highspeed interruption. 4,5 The authors did a research on hybrid dc switches using SiC (silicon carbide) MOSFET-devices that have been increasingly commercially developed as low-loss high-speed semiconductor switches. As a result, it was found that arcless commutation in which no arc discharge occurs between electrical contacts can be realized if commutation to a semiconductor switch is completed when a molten metal bridge has been formed during contact breaking.…”

Section: Introductionmentioning

confidence: 99%

Development of copper‐tungsten clad‐contacts for 400 A‐arc‐less switching of hybrid dc switch

Yamada

Chen

Yasuda

2020

Electrical Engineering Japan

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A hybrid dc switch has been studied extensively due to the increasing demand for photovoltaic plants or dc power distribution systems. The advantages of the hybrid dc switch are low contact resistance and high‐speed interruption. We have demonstrated an arc‐less commutation of current from copper‐based tungsten contacts to a SiC‐MOSFET. The arc‐less commutation prevents the contact erosion that is one of the drawbacks of conventional dc mechanical switches. This report shows the experiment results on the threshold current of the arc‐less commutation and the contact resistance with different material contacts up to 400A in a hybrid dc switch.

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A fast LVDC vacuum hybrid circuit breaker: Dielectric recovery and design consideration

Liu

Liang

et al. 2021

IET Generation Trans & Dist

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Aiming at the fast protection requirements of electrical ships LVDC distribution system, this paper studies a topology of unidirectional vacuum hybrid circuit breaker. The hybrid circuit breaker is an improved current injection LVDC breaker based on precharged capacitor, which improves the dielectric recovery capability of vacuum interrupter after artificial current zero by using a freewheel diode. A synthetic test platform is built to study the dielectric strength recovery characteristics of a 45 mm diameter CuCr50 butt contact vacuum interrupter (driven by Thomson coil actuator, average opening speed of about 3 m/s)under high current(about 20 kA) and small gap(about 1 mm). The experimental results indicate that the dielectric strength of the contact can recover at a very fast speed within the arc time of 100 µs; when the arc time is increased to 320 µs, the dielectric strength of the contact cannot recover for a long time. Therefore, the design principle of the circuit breaker is obtained: within the arc time of 100 µs, by increasing the arc time can increase the contact distance, so the transient interruption voltage tolerance margin of the circuit breaker can be improved. Based on the results of the test, this paper also proposes a calculation method of forced commutation circuit parameters, which is verified by the simulation. The research results show that the DC circuit breaker can realise the rapid breaking of 20 kA fault current within 2 ms, and has a good application prospect in the LVDC distribution system.

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Design of a bi-directional 600 V/6 kA ZVS hybrid DC switch using IGBTs

Cited by 24 publications

References 6 publications

Effect of adding impedance for current balancing on the vacuum arc commutation characteristics of DC microgrid hybrid circuit breakers

Effect of adding impedance for current balancing on the vacuum arc commutation characteristics of DC microgrid hybrid circuit breakers

Development of copper‐tungsten clad‐contacts for 400 A‐arc‐less switching of hybrid dc switch

A fast LVDC vacuum hybrid circuit breaker: Dielectric recovery and design consideration

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