Experimental investigation on HVDC vacuum circuit breaker based on artificial current zero

Zhang, Yingkui; Shi, Zongqian; Wang, Qiaosen; Gao, Zhao; Jia, Shenli; Wang, Lijun

doi:10.1109/deiv.2016.7763995

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…1 MOV In this section, the structure and the turn-off procedure of the current-injection DC-CB in Fig. 1 is shortly explained [3,6]. The current-injection DC-CB can basically be divided into three parallel branches:…”

Section: Current Injection Branchmentioning

confidence: 99%

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Jehle

Biela

2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

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In hybrid DC circuit breakers with current-injection, the arc in the mechanical switch is extinguished with a current pulse. After the arc extinction, the voltage increase across the mechanical switch must be limited in order to avoid an arc reignition. The voltage across the MS is usually assumed to be equal to the voltage across the capacitor C CI in the current-injection circuit, which increases slowly due to slow charging of the capacitor by the fault current. However, in reality the voltage across capacitor C CI is usually not zero at the point in time of the arc extinction. This results in high transient voltages across the mechanical switch, the so called so-called initial transient interruption voltage (ITIV) after the arc extinguishes. However, a fast increasing ITIV can lead to a thermal reignition of the arc. Therefore, it is crucial for the design of a DC-CB to understand, which effects contribute to a high ITIV. In this paper, these causes and the influence of the ITIV are investigated. Furthermore, the beneficial influence of grading capacitors parallel to the MS is investigated. Finally, an optimization of a DC-CB including the ITIV and its results are presented for a typical implementation of a current-injection DC-CB.

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Section: Current Injection Branchmentioning

confidence: 99%

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Jehle

Biela

2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

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“…The existing mechanical DC CB module includes 80 kV/10.5 kA/5 ms and 55 kV/16 kA/5 ms, which can be connected in a series to gain the mechanical HVDC CB. In 2018, the mechanical HVDC CB with the rated voltage of 160 kV has been designed and applied in the China Southern Power Grid [9,10]. The on state resistance and cost of the mechanical HVDC are low while the synchronism and the serial structure of the HVDC CB are complex.…”

Section: Introductionmentioning

confidence: 99%

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

Cheng¹,

Yang²,

Ge³

et al. 2019

Plasma Sci. Technol.

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Vacuum gaps have rapid dynamic dielectric recovery speed while SF 6 gaps have high insulation strength. The series-connected vacuum and SF 6 gaps are used as the main switch (MS), which combines their advantages. The work aims to verify the feasibility of serial vacuum and SF 6 gaps in mechanical HVDC interruption. The test circuit of the dynamic dielectric recovery performance (DDRP) is set up. The DDRP is tested under free recovery condition by the high voltage pulse source. The DDRP of the vacuum circuit breaker (VCB) and SF 6 gas circuit breaker (GCB) in DC interruption with active current injection is analyzed and compared. The test results indicate that the dielectric recovery duration of the VCB is below 30 μs while that of the GCB is above 100 μs. In order to achieve the cooperation between the VCB and GCB, a novel hybrid HVDC circuit breaker (CB) based on series-connected vacuum and SF 6 gaps is proposed. The 'voltage-zero' duration is created by introducing the follow current loop and there more recovery time for the dielectric recovery of the MS. The voltage distribution is controlled by the voltage dividing method so that the VCB undertakes the initial transient recovery voltage (TRV) and the later TRV is took by the GCB. The theoretical synergy characteristic of the novel HVDC CB is obtained. The paper supplies a new method to improve the custom mechanical HVDC CB, which is useful to achieve the HVDC CB with less serial breaks.

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“…Thus, the burning arc in the vacuum interrupter (VI) [8] can be extinguished by the FCZ. Then, the breaker in the main circuit can successfully interrupt the DC current [9,10]. A successful interruption is significantly influenced by the transient characteristics of the current-commutation process, such as the rates of the current and voltage at zero-crossing (|di/dt| and |dv/dt|).…”

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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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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Experimental investigation on HVDC vacuum circuit breaker based on artificial current zero

Cited by 10 publications

References 7 publications

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method

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

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Experimental investigation on HVDC vacuum circuit breaker based on artificial current zero

Cited by 10 publications

References 7 publications

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Impact of the Initial Transient Interruption Voltage (ITIV) on the Design and Operation of Hybrid Current-Injection DC Circuit Breakers

Dynamic dielectric recovery performance of serial vacuum and SF6 gaps in HVDC interruption and its regulation method

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

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Product

Resources

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Dynamic dielectric recovery performance of serial vacuum and SF₆ gaps in HVDC interruption and its regulation method