Three-dimensional magnetic field analysis of electrodes for VCBs [vacuum circuit breakers]

Nitta, Koichi; Watanabe, Kenji; Kagenaga, K.; Mori, Toshiyuki; Kaneko, Eiji; Somei, H.; Takahashi, Hidekazu

doi:10.1109/61.634170

Cited by 29 publications

(5 citation statements)

References 3 publications

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“…Analysis of the performance indexes of the vacuum interrupter under the structural parameters of groups a, b, and c indicates that the more B is increased, the smaller R is reduced. To allow a comparison of B and R on the same horizontal line, this paper normalizes the multi-objective optimization results and introduces the appropriate weight proportion of objective parameters to evaluate the comprehensive performance of the system, as shown in (18).…”

Section: Analysis Of Optimization Resultsmentioning

confidence: 99%

“…Here, k 1 = k 2 = 0.5. The optimized results of groups a, b, and c are brought into Equation (18). The CP value of the contact system of group b is 17.8%, and the comprehensive performance is improved significantly.…”

Section: Analysis Of Optimization Resultsmentioning

confidence: 99%

“…In the magnetic field analysis, the influence of arc diameter on the longitudinal magnetic field can be ignored. It is assumed that the arc is a cylinder, its diameter is equal to the diameter of dynamic and static contacts, and its length and contact opening distance are equal [17,18]. The simplified physical model of magnetic field analysis of vacuum interrupter is shown in Fig.…”

Section: Physical Model Of Vacuum Interrupter Contact Systemmentioning

confidence: 99%

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Multi‐Objective Optimization Design of Vacuum Interrupter Structure Based on Improved Artificial Jellyfish Search Algorithm

Dai

2023

IEEJ Transactions Elec Engng

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An improved multi‐objective optimization method based on artificial jellyfish search algorithm is proposed to solve the multivariable and multi‐objective optimization problem of vacuum interrupter with mutual coupling of structural parameters and mutual restriction of performance indexes. The finite element model of 40.5 kV/31.5kA vacuum interrupter is established. The structural parameters of seven important parts such as contact diameter and contact sheet thickness in vacuum interrupter are taken as optimization variables. The optimization objective is to maximize the longitudinal magnetic field strength and minimize the conductor resistance at the peak breaking short‐circuit current of vacuum interrupter. The artificial jellyfish search algorithm is improved on the population position initialization strategy and the population mutation cross‐update strategy. The Pareto front solution of the structural parameters of the vacuum interrupter is obtained by the joint simulation of finite element analysis and numerical calculation software. Finally, the multi‐parameter and multi‐objective optimization design of vacuum interrupter structure is realized. The comprehensive performance index is introduced into the optimal parameter group of jellyfish on the Pareto front. Under the constraint of weight variables, the optimal structural parameters of contact system are obtained. The axial magnetic induction intensity of the optimized vacuum interrupter contact is increased by 13.2%, and the conductor resistance is reduced by 25.4%. The comprehensive performance of vacuum interrupter is improved by 17.8%, and the stability and reliability of the power system are further improved. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Section: Analysis Of Optimization Resultsmentioning

confidence: 99%

Section: Analysis Of Optimization Resultsmentioning

confidence: 99%

Section: Physical Model Of Vacuum Interrupter Contact Systemmentioning

confidence: 99%

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Multi‐Objective Optimization Design of Vacuum Interrupter Structure Based on Improved Artificial Jellyfish Search Algorithm

Dai

2023

IEEJ Transactions Elec Engng

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“…1, but the copper conductor rod was replaced by a vacuum arc. Because the arc diameter has little effect on AMF, it was set to be the same as the contact [11,12] . The arc conductivity was set to be 2800 S/m [1,12] .…”

Section: Comparison Of Resultsmentioning

confidence: 99%

Arc Behaviours in Vacuum Interrupters with Axial Magnetic Field Electrodes

Wang

Zheng

Liu

et al. 2008

Plasma Sci. Technol.

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To improve the limiting current interruption capability and minimizing vacuum interrupter with axial magnetic field (AMF) electrodes, it is significant to investigate the vacuum arc behaviours between the contacts. AMF distributions of the slot type electrodes were studied by both numerical analysis and experiments. Furthermore, the behaviours of vacuum arcs for different parameters of the slot type AMF electrodes were investigated by using high-speed CCD camera. The influences of gap distance, contact diameter and phase shift time between AMF and arc current on the vacuum arc were investigated. The results provide a reference for research and development of vacuum interrupters with slot type or other types of AMF electrode.

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“…A set of measurement equipment which was similar to Nitta et al [4] was used. An AC current of 100 A flowed from upper electrode to the lower one via two copper conducting rods that simulated the two vacuum arc columns.…”

Section: Verification Of the Improvement Of Isbementioning

confidence: 99%

Analysis of axial magnetic field of an iron style bipolar axial magnetic field vacuum interrupter

Liu

Wang

et al. 2001

IEEE Trans. Plasma Sci.

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An axial magnetic field (AMF) electrode for a vacuum interrupter iron style bipolar electrode (ISBE), is improved in order to distribute vacuum arc over contact plate as much as possible and reduce eddy current in iron cores. The improvements include increasing iron core area to the edge of contact plate and using laminated iron core (1.2 mm in our case), based on analysis of AMF in the gap and eddy current in iron cores. AMF measurement results show that axial magnetic flux density of improved ISBE is almost two times stronger than that of original one, and there is only a little loss at edge of contact plate. However, the axial magnetic flux density of original ISBE at edge of contact plate is much lower. The vacuum arc picture recorded by a high speed CCD camera proves that AMF of improved ISBE has ability to distribute vacuum arc over most area of the entire contact surface, even at the edge region. Eddy current induces phase shift. The maximum value of phase shift in middle plane of contact gap of the original ISBE is 3.5 ms and it is reduced to 2.0 ms in the improved one, which is similar to other AMF electrodes.Index Terms-Axial magnetic field, eddy current, vacuum arc, vacuum interrupter.

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Three-dimensional magnetic field analysis of electrodes for VCBs [vacuum circuit breakers]

Cited by 29 publications

References 3 publications

Multi‐Objective Optimization Design of Vacuum Interrupter Structure Based on Improved Artificial Jellyfish Search Algorithm

Multi‐Objective Optimization Design of Vacuum Interrupter Structure Based on Improved Artificial Jellyfish Search Algorithm

Arc Behaviours in Vacuum Interrupters with Axial Magnetic Field Electrodes

Analysis of axial magnetic field of an iron style bipolar axial magnetic field vacuum interrupter

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