Optimization of Hybrid Current-Injection Circuit Breakers Including Mechanical Switch Limitations

Jehle, Andreas; Biela, J.

doi:10.23919/epe.2019.8915118

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…• Semiconductive element application, where the main switching branch consists of transistors, thyristors, triacs, and so on, and realizes the function of the main valve [7][8][9][10][11]; • Switching off by counter-current application methods [12]; • Passive component application for arc energy absorption (e.g., capacitors) [13].…”

Section: Research Topicsmentioning

confidence: 99%

Switching Arc Energy Limitation Approach for LV Circuit Breakers

Smugala

Bonk

2021

Energies

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This paper presents an experimentally verified approach to deriving switching arc energy limitations for low-voltage (LV) circuit breakers (CBs). Air-insulated contactors equipped with additional vacuum-insulated (VI) arcing contacts were tested for AC and DC current interruption efficiency, respectively. In the study, the contact arrangements of reed relay VI contact switches of low current breaking capacity combined with air-insulated contactors were examined. Tests were performed on selected LV CBs inductively loaded for LV power network rated voltages. A comparative analysis of the arc energy resulting from various arc time durations recorded during the switching-off operation was performed. Using a variety of either basic CB air-insulated contact systems or combined contact systems, a practical assessment of the proposed idea for enhancing the arc quenching efficiency was undertaken. As a result of the implementation of the proposed idea, the arc burning duration time was indicated as being hundreds of times shorter. In most cases, a complete arc reduction was achieved. Moreover, the resulting arc energy dissipation during the breaking operation was substantially minimized. Consequently, a significant increase in the total current breaking capacity of the tested CBs was achieved.

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Section: Research Topicsmentioning

confidence: 99%

Switching Arc Energy Limitation Approach for LV Circuit Breakers

Smugala

Bonk

2021

Energies

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“…Researchers have also optimized the parameters of the commutation circuit. In reference [23], considering the influence of mechanical switch characteristics and the currentlimiting inductance value on the breaking of the circuit breaker, the optimization design of the circuit breaker is carried out with the objective function of minimizing the number of semiconductors and the capacitor energy. In reference [24], the optimization design of the commutation circuit for the HDCCLCB is realized.…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization Design of the Commutation Circuit of a Hybrid DC-Current-Limiting Circuit Breaker

Lv,

Zhuang,

et al. 2023

Energies

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Aimed at the optimization design of the parameters of the commutation circuit of a hybrid DC-current-limiting circuit breaker (HDCCLCB), a parameter selection model considering the short-time withstand of the thyristor and the volume of the commutation circuit is proposed by simplifying the object, and the commutation circuit parameters were preliminarily obtained. In order to verify the correctness of the method of selecting the commutation circuit parameters, the circuit simulation model of the HDCCLCB was built. The experimental platform was built, and the breaking experiment was completed under the fault condition with the current rising rate of 20 A/μs. The correctness of the simulation model and parameter design method was verified by comparing the circuit model simulation results with the experimental results. In order to further optimize the parameters of the commutation circuit, a mathematical model for optimization design was established. Taking the maximum critical breakdown voltage under unit capacitance energy as the objective function, the arcing time before commutating and the current-limiting inductance and capacitance are enumerated to obtain the optimized commutation circuit parameters. By comparing this result with the result of the preliminary design, the objective function is improved by 20.7%, laying a solid foundation for further research and the development of current-limiting circuit breakers for medium-voltage DC systems.

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Optimization of Hybrid Current-Injection Circuit Breakers Including Mechanical Switch Limitations

Cited by 2 publications

References 22 publications

Switching Arc Energy Limitation Approach for LV Circuit Breakers

Switching Arc Energy Limitation Approach for LV Circuit Breakers

Parameter Optimization Design of the Commutation Circuit of a Hybrid DC-Current-Limiting Circuit Breaker

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