Analysis of underwater plasma discharge based on equivalent circuit parameters

Abstract

The control of discharge mode and the optimization of energy efficiency are of particular concern as the significant impact on the application of the underwater plasma discharge system. In this paper, the RLC parameters of each part of the underwater discharge system are investigated, and the equivalent circuit is obtained. Typical waveforms of current and voltage for different underwater discharge modes are displayed. The correlation between the equivalent RLC parameters of the discharge system and the discharge modes and energy is illustrated. The equivalent circuit of the underwater plasma discharge system is utilized to analyze the effects of the power source, electrode, and liquid dielectric parameters. The influences of these parameters can be identical to the impacts on the RLC parameters of the underwater discharge system equivalent circuit simultaneously, and then, the effects on the discharge modes and energy can be better understood. It can be concluded that the relative relationship of system equivalent RLC parameters determines the discharge mode, and the impedance matching between the discharge channel and the external circuit determines the discharge energy.

Improvement of circuit oscillation generated by underwater high voltage pulse discharges based on pulse power thyristor

“…It can be seen from figure 9 that, when R<2(L/C) 1/2 , the system exhibits underdamped oscillation, and the peak oscillation will cause great damage to the system. When the electrode breaks down in the discharge process, the system meets the damping oscillation condition according to the simulation results, which were also consistent with the relevant research [35,36]. When circuit oscillation occurs, the capacitor voltage and current satisfy where A and K are constants, j and β are angles, the capacitor voltage and the current show oscillation attenuation trend.…”