High Voltage Electric Pulse Drilling: A Study of Variables through Simulation and Experimental Tests

Wang, Guanglin; Pan, Xudong; Li, Yuefeng; He, Jianqi; Qi, Yue; Yang, Jin‐Hui

doi:10.3390/en16031174

Cited by 3 publications

(2 citation statements)

References 26 publications

(34 reference statements)

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“…Li et al [4] established a shock wave model and a damage model of high voltage EPB in granite based on the Particle Flow Code two-dimensional program, and analyzed the time-varying waveforms of shock waves with different electrical parameters and the breakage process of the rock surface and internally. Zhang et al [17] used simulation experiments analyze the effect of rock samples (bubble volume, spacing, and rock thickness) and different factors (voltage and electrode spacing) on the effect of high-voltage electric pulses on rock breaking. Zhu et al [18] introduced an electric breakdown model to nd that the breakdown channel originated from the weak electric strength in the rock, and the development of the channel was highly dependent on the heterogeneity of the rock medium.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Effect of Initial Generator Capacitor Voltage on Granite Fragmentation by High Voltage Pulse Discharge

Che,

Pan,

2023

Preprint

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High voltage pulse discharge technology has been proven to have good prospects in rock fragmentation and drilling, yet its mechanisms are not fully understood and there are many influencing factors, which are the main obstacles to restricting the commercialization of this method. This study investigates the discharge channel responses in the process of high voltage pulse discharge crushing granite by using physical-mathematical model and numerical simulation model, which includes the state, electrical characteristics and physical feature of the discharge channel, and analyzes the effect of the initial generator capacitor voltage. The results show the discharge voltage and current, the maximum depth and width of the discharge channel developing into the granite obtained based on the simulation can effectively reflect the experimental results. In addition, the simulation of the initial generator capacitor voltage from 240kV to 420kV illustrates the number, time, cross-sectional area of the main discharge channel between the two discharge electrodes, power and energy of injection into discharge channel, the maximum conductivity, length, pressure, radius of the discharge channel and the extended maximum depth of the main discharge channel increase as the initial generator capacitor voltage increases. This suggests that to enlarge the initial voltage of the high voltage pulse discharge power supply can improve the fragmentation effect. This study has a certain guiding significance for improving crushing efficiency, optimization of the discharge electrode structure and selection of the power supply parameters in the process of high voltage pulse discharge crushing granite.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Effect of Initial Generator Capacitor Voltage on Granite Fragmentation by High Voltage Pulse Discharge

Che,

Pan,

2023

Preprint

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“…The ability to quickly release the accumulated energy is crucial for powerful pulse devices. Such types of devices include laser installations and devices for processing materials by the electrophysical method [4]. [3].…”

Section: Introductionmentioning

confidence: 99%

Battery Dynamic Balancing Method Based on Calculation of Cell Voltage Reference Value

et al. 2023

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The article is devoted to solving the problem of charge equalization of multi-element batteries with rated voltage up to 1000 V, operating in dynamic modes with different charge and discharge depths. This article proposes a method of balancing the voltages of power battery elements. The essence of the proposed method is to form a reference signal equivalent to the reference voltage of the battery element for the current state of charge. The novelty of the method presented in this article, in comparison with relevant existing techniques, lies in active control over the balancing circuit proportional to real cell voltage deviation from the reference value. The proposed method can be used both for passive balancing techniques based on ballast resistors, and for circuits made on electromagnetic energy redistribution systems between galvanic cells. A number of Simulink models were developed to determine the electrical parameters of active and passive balancing circuits. Performance and accuracy study of balancing a multi-element battery in charge and discharge modes was conducted by Simulink models. It was established that, compared to classical methods, the proposed balancing method enhances the accuracy by 1.43 times and improves dynamic indices of the balancing process at any state of charge of batteries. The proposed balancing method is a perspective for energy storage systems based on multi-element batteries for power supply nodes of high-power loads with pulsed and repeated short-term operation modes.

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Experimental and numerical study on the facture behavior of heated-granite subjected to high-voltage electric pulse

Yin,

Liu,

Chen

et al. 2024

Engineering Fracture Mechanics

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High Voltage Electric Pulse Drilling: A Study of Variables through Simulation and Experimental Tests

Cited by 3 publications

References 26 publications

Numerical Simulation of the Effect of Initial Generator Capacitor Voltage on Granite Fragmentation by High Voltage Pulse Discharge

Numerical Simulation of the Effect of Initial Generator Capacitor Voltage on Granite Fragmentation by High Voltage Pulse Discharge

Battery Dynamic Balancing Method Based on Calculation of Cell Voltage Reference Value

Experimental and numerical study on the facture behavior of heated-granite subjected to high-voltage electric pulse

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