8 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 invention discloses a device and a method for enhancing a carbon dioxide absorption process by a streamer discharge method. The device comprises an insulating tower body, and an air inducing unit, a streamer discharge unit, a liquid accumulation disc, a magnetic field generator, an absorption section filler, an ultrasonic oscillation module, a spray head and a demisting unit which are sequentially arranged in the insulating tower body from bottom to top, the liquid accumulation disc is connected with the spray head through a pipeline with a pump, and liquid in the liquid accumulation disc is conveyed to the spray head. According to the invention, carbon dioxide in gas can be ionized and oxidized, the activity is enhanced, the absorption rate of the absorption liquid to the carbon dioxide is increased, and the escape quantity of the absorbent is effectively reduced.

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 present invention discloses a method for screening and designing additive molecules for optimizing the performance of ester-based insulating oil, and relates to the technical field of electrical insulating materials. In view of the problem that ester-based insulating oil is prone to generate rapid streamers under high-intensity lightning strikes, resulting in insufficient breakdown voltage performance and that it is time-consuming and laborious to find suitable additives through experiments, the present invention proposes a method for designing additive molecules in combination with a deep molecular generation model. The method comprises: obtaining molecular data with target electronic properties; using fragments of the molecular structure as input to the model, and designing new additive molecular structures using a molecular generation model; performing molecular screening according to target characteristics; and verifying the performance of the screened molecules through streamer discharge simulation. The present invention utilizes a deep autoregressive neural network to realize the generative design of ester-based insulating oil additive molecules, significantly improving the efficiency of molecular screening and providing a new technical route for improving the breakdown voltage performance of ester-based insulating oil.

The invention belongs to the technical field of low-temperature discharge plasma, and discloses an air pre-ionization jet discharge device with double grounding electrodes, which structurally comprises a pointed rod electrode, an insulating plug, an insulating sleeve, an upper end grounding electrode and a lower end grounding electrode. Pre-ionization is generated through the pre-ionization area between the upper end grounding electrode and the pointed rod electrode, seed electrons are provided for the main discharge area between the lower end grounding electrode and the pointed rod electrode, and the initial discharge voltage of the pointed rod electrode is reduced; under the action of preionization, the length of the plasma plume is longer than that of jet flow of a common needle-ring type single grounding electrode device under the same discharge parameter; meanwhile, two discharge areas, namely a pre-ionization area and a main discharge area, exist between the two grounding electrodes and the pointed rod electrode, so that the discharge area is increased, local overdischarge is prevented, and the jet discharge stability is improved. The air pre-ionization jet discharge device has practical value in the fields of water treatment, sterilization, biomedicine and the like.