Characterization of suspension discharge photoelectric pulse in clean air insulated GIS

As an excellent insulating medium, SF6 gas has many advantages and has been widely used in electrical equipment. However, with the introduction of relevant regulations on carbon emission reduction and greenhouse gas emission reduction such as the "dual carbon" target, the pace of research on the replacement of SF6 gas insulation for high-voltage power equipment has been accelerated. At present, clean air, as one of the environmentally friendly alternative gases, has gradually begun to be used in electrical equipment. Therefore, the study of clean air insulated suspension discharge is of great significance for the operation and maintenance of electrical equipment. In this paper, a photoelectric joint detection platform was first built to detect the pulse current, ultraviolet band, visible light and infrared band signals of suspension discharge in clean air insulation. The development process of suspension discharge in clean air insulation was studied, and the change law of each signal was analyzed respectively, providing a reliable basis for fault diagnosis and pattern recognition of clean air insulation electrical equipment.