SIGNAL EXTRACTION DEVICE AND METHOD FOR ULTRAHIGH-FREQUENCY PARTIAL DISCHARGE SENSOR IMPLANTED IN SULFUR HEXAFLUORIDE CURRENT TRANSFORMER

摘要

A signal extraction device and method for an ultrahigh-frequency partial discharge sensor implanted in a sulfur hexafluoride current transformer. The signal extraction device comprises a connector installation base (15) welded on a transformer base near a through-hole; and a connector (16) fixedly installed on the connector installation base. The connector is composed of a casing, a bush (6), a glass insulator (3) and an internal conductor (1), and the bush, the glass insulator and the internal conductor are formed integrally by cooling adhered glass after sintering and fusing. The casing is composed of an upper casing body (8) and a lower casing body (7) connected through screw threads, and the bush is welded on the inner wall of the upper casing body or the lower casing body. The signal extraction device and method can extract an ultrahigh-frequency signal outputted by the partial discharge sensor arranged inside the sulfur hexafluoride current transformer out of the transformer, and have good electrical performance and sealing performance.