5 results about "Streamer discharge" patented technology

The invention relates to the technical field of lasers, and discloses a corona-based creeping spark discharge strong pre-ionization pulse gas laser which comprises a main frame chamber, a pre-ionization device is fixedly mounted at the top of an inner cavity of the main frame chamber, a cathode electrode is arranged at the top of the inner cavity of the main frame chamber, and a connecting copper sheet is fixedly mounted on the lateral upper portion of the inner wall of the main frame chamber. A flow guide plate is fixedly installed on the connecting copper sheet, and an anode electrode is fixedly installed at the top end of the flow guide plate. A corona-based creeping spark discharge strong pre-ionization pulse gas laser is characterized in that a pre-ionization area can be formed on a pre-ionization device and structures on the pre-ionization device, electrons in the pre-ionization area move in an accelerated manner under the action of electric field force, and in the movement process, the electrons in the pre-ionization area are separated from the pre-ionization device. And the electrons and other gas particles are subjected to inelastic collision and ionization or excitation, so that high-concentration and uniform initial electrons are generated, a micro-discharge channel is formed, and continuous seed electrons are provided for a core discharge region of the micro-discharge channel.

The invention discloses a modeling method for a streamer discharge process in natural ester insulating oil by considering ionization in bubbles. The modeling method comprises the following steps: 1) constructing a two-dimensional non-axisymmetric model for simulating discharge of bubbles to streamers in the natural ester insulating oil under lightning impulse voltage; 2) introducing a plasma chemical reaction, and constructing a natural ester insulating oil stream discharge electrohydrodynamic model coupled with an ionization process of gas molecules in bubbles; and after a set voltage is applied to the two-dimensional non-axisymmetric model, the natural ester insulating oil streamer discharge electro-hydrodynamic model simulates a natural ester insulating oil streamer morphology evolution process. According to the method, the drift-diffusion-reaction process of the plasma in the bubble and the Poisson equation are subjected to self-consistent solution, and the plasma generation process in the bubble under the strong electric field is integrated into the existing streamer discharge model, so that the method is beneficial to understanding the liquid dielectric breakdown theory.

This application relates to the field of laser technology and discloses a corona-based surface spark discharge high-intensity pre-ionization pulsed gas laser, including a main frame chamber. A pre-ionization device is fixedly installed on the top of the main frame chamber, and a cathode electrode is provided on the top of the main frame chamber. A connecting copper plate is fixedly installed on the upper side of the inner wall of the main frame chamber, and a guide plate is fixedly installed on the connecting copper plate. An anode electrode is fixedly installed on the top of the guide plate. In this corona-based surface spark discharge high-intensity pre-ionization pulsed gas laser, the pre-ionization device and its structure can form a pre-ionization region on the pre-ionization device. Under the action of an electric field, electrons in the pre-ionization region accelerate. During this motion, electrons collide with other gas particles inelastically and undergo ionization or excitation, thereby generating a high-concentration and uniform initial electron and forming a micro-discharge channel, providing a continuous supply of seed electrons to its core discharge region.

The application belongs to the technical field of equipment insulation influence evaluation considering streamer discharge, and provides a streamer discharge simulation modeling method, system, medium and equipment of charge behavior under complex working condition coupling, which is based on the theory of shearing separation of double electric layer, and an oil-paper-interface multi-region charge dynamic transport simulation model is established by coupling oil flow convection term, shearing term and temperature effect; based on the established transport simulation model, the whole evolution process of streamer discharge from diffusion, longitudinal evolution to transverse migration under the coupling of electric field, fluid field and thermal field is simulated by combining the charge injection and extraction boundary conditions at the electrode, the charge density distribution and electric field strength distribution data in the streamer evolution process are obtained; the streamer evolution law is analyzed based on the charge density distribution and electric field strength distribution data, so as to evaluate the oil-paper insulation state or optimize the oil-paper insulation structure. The coupling effects of electric field, fluid field and thermal field are comprehensively considered, and the actual operating condition of the converter transformer is more accurately simulated.

The application belongs to the technical field of equipment insulation influence evaluation considering streamer discharge, and provides a streamer discharge simulation modeling method, system, medium and equipment of charge behavior under complex working condition coupling, which is based on the theory of shearing separation of double electric layer, and an oil-paper-interface multi-region charge dynamic transport simulation model is established by coupling oil flow convection term, shearing term and temperature effect; based on the established transport simulation model, the whole evolution process of streamer discharge from diffusion, longitudinal evolution to transverse migration under the coupling of electric field, fluid field and thermal field is simulated by combining the charge injection and extraction boundary conditions at the electrode, the charge density distribution and electric field strength distribution data in the streamer evolution process are obtained; the streamer evolution law is analyzed based on the charge density distribution and electric field strength distribution data, so as to evaluate the oil-paper insulation state or optimize the oil-paper insulation structure. The coupling effects of electric field, fluid field and thermal field are comprehensively considered, and the actual operating condition of the converter transformer is more accurately simulated.