Study on Static and Dynamic Voltage Distribution Characteristics and Voltage Sharing Design of a 126-kV Modular Triple-Break Vacuum Circuit Breaker

Huang, Daochun; Gao, Wu; Ruan, Jiangjun

doi:10.1109/tps.2015.2449075

Cited by 24 publications

(4 citation statements)

References 17 publications

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“…The values of the grading capacitors were set in the range of 700 to 12,000 pF. The authors of [13] indicated that grading capacitors of 1000 pF can meet the opening requirements of a 126 kV triple-break VCB. However, for the 363 kV VCB, the first break shared 23.3% of the applied voltage when the grading capacitor was 1000 pF.…”

Section: Grading Capacitor Designmentioning

confidence: 99%

“…Conversely, multi-break VCBs, which are several vacuum interrupters connected in series, can eliminate the saturation effect and increase the breaking capacity [10]. Hence, the multi-break VCB has drawn more attention [11][12][13][14][15]. The total interruption time of VCBs with an ultra-fast electromagnetic repulsion mechanism and a fault current detection system can be reduced to 10-20 ms [13].…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the multi-break VCB has drawn more attention [11][12][13][14][15]. The total interruption time of VCBs with an ultra-fast electromagnetic repulsion mechanism and a fault current detection system can be reduced to 10-20 ms [13]. Based on this technology, several features of double-and triple-break VCBs have been investigated, including the open velocity, voltage distribution, and synchronization of each VCB; additionally, a breaking test has been conducted on prototypes [13,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…The total interruption time of VCBs with an ultra-fast electromagnetic repulsion mechanism and a fault current detection system can be reduced to 10-20 ms [13]. Based on this technology, several features of double-and triple-break VCBs have been investigated, including the open velocity, voltage distribution, and synchronization of each VCB; additionally, a breaking test has been conducted on prototypes [13,16,17]. Vertical series connected structures of doubleand triple-break VCBs have been investigated with the purpose of analyzing their static voltage distribution.…”

Section: Introductionmentioning

confidence: 99%

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Static Voltage Sharing Design of a Sextuple-Break 363 kV Vacuum Circuit Breaker

Yang

et al. 2019

Energies

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A balanced voltage distribution for each break is required for normal operation of a multi-break vacuum circuit breaker (VCB) This paper presented a novel 363 kV/5000 A/63 kA sextuple-break VCB with a series-parallel structure. To determine the static voltage distribution of each break, a 3D finite element method (FEM) model was established to calculate the voltage distribution and the electric field of each break at the fully open state. Our results showed that the applied voltage was unevenly distributed at each break, and that the first break shared the most voltage, about 86.3%. The maximum electric field of the first break was 18.9 kV/mm, which contributed to the reduction of the breaking capacity. The distributed and stray capacitance parameters of the proposed structure were calculated based on the FEM model. According to the distributed capacitance parameters, the equivalent circuit simulation model of the static voltage distribution of this 363 kV VCB was established in PSCAD. Subsequently, the influence of the grading capacitor on the voltage distribution of each break was investigated, and the best value of the grading capacitors for the 363 kV sextuple-break VCB was confirmed to be 10 nF. Finally, the breaking tests of a single-phase unit was conducted both in a minor loop and a major loop. The 363 kV VCB prototype broke both the 63 kA and the 80 kA short circuit currents successfully, which confirmed the validity of the voltage sharing design.

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Section: Grading Capacitor Designmentioning

confidence: 99%