Research on the Overcurrent-Short Circuit Protection Method of Nanosecond Pulse Power Supply Applied in the Field of Gliding Arc Discharge

Abstract

Atmospheric pressure gliding arc discharge has a wide range of applications in the fields of energy environment and material processing. During the discharge process, with the conversion of the gliding arc discharge mode, for the driving power supply, the output of the discharge process is from an open circuit to a near short circuit. There are two kinds of work. The switching of states requires an additional design of overcurrent-short-circuit protection methods suitable for gliding arc discharge applications. The nanosecond pulse power supply is the most potential excitation power source in the field of gliding arc discharge, and has broad application research prospects. In order to solve the problem of overcurrent and short circuit at the output terminal caused by gliding arc discharge, this paper proposes an over-current-short-circuit protection solution based on a Marx generator-based nanosecond pulse power current-limiting protection module and an automatic quick-cutting protection module. By analyzing the working process of the Marx pulse power supply and the working characteristics of the MOSFET, a current-limiting scheme to transfer the switch from the saturation region to the variable resistance region is designed, and the calculation method of the parameter design of the current-limiting resistor network is designed. At the same time, in order to solve the problem that the current-limiting protection scheme cannot cope with the normal short-circuit of the output terminal, an automatic quick-cut protection module is designed, including a short-circuit detection circuit, a fault latch circuit and an action circuit, which realizes the high-reliability triggering of the short-circuit fault signal, thereby solving the problem of a normal short-circuit at the output terminal. Finally, through the simulation experiment method, the feasibility of the over-current short-circuit protection scheme proposed in this paper is verified.