Research on Discharge Characteristics of Three-Electrode Load Under the Pulsed Power Supply

Low-temperature plasma water treatment technology has attracted more and more attention due to its nonselectivity and no secondary pollution. However, high energy consumption limits its further development. In this experiment, a three-electrode structure combining a needle-plate structure and a dielectric barrier discharge (DBD) structure is proposed. The discharge characteristics of the three-electrode structure are studied under the matched all-solid-state pulsed power supply. The results show that three discharges are generated at this three-electrode load within one pulse period. It greatly increases the number of discharges per pulse. Under the same pulse voltage condition, the injected power of the three-electrode load is much higher than the power of the single DBD load. When the voltage is 13 kV, the input power of three-electrode load is increased by 70% compared to single DBD load. When the needle-plate gap is constant, with the increase of DBD air gap, the injected power of the three-electrode load has a maximum value. When the DBD air gap remains unchanged, the injected power of the three-electrode load decreases with the increase of the needle-plate gap.