Ground wire DC (direct current) deicing method based on discharge gap insulator

Abstract

The invention provides a ground wire DC deicing method based on a discharge gap insulator. The ground wire DC deicing method based on the discharge gap insulator comprises the steps of (1) searching an ice-covered overhead ground wire; (2) connecting a piece of insulator between the overhead ground wire and an iron tower in series; (3) connecting a fitting or an arrester between the insulator and the iron tower in parallel; (4) shortcircuiting the tail end of a double-circuit insulation overhead ground wire of a discharge gap; (5) configuring a DC deicing device; (6) disconnecting the grounding of a head end and a tail end of the insulation overhead ground wire; (7) starting the DC deicing device; (8) closing the DC deicing device during ice shedding; (9) disconnecting and grounding the double-circuit insulation overhead ground wire; and (10) disconnecting and grounding the shortcircuited tail end of the double-circuit insulation overhead ground wire. The ground wire DC deicing method based on the discharge gap insulator has the advantages of effectively avoiding line breaking and tower collapse, improving the efficiency and the safety of ground wire deicing and greatly reducing the system capacity required by deicing.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a ground wire DC ice-melting method based on a discharge gap insulator. Background technique [0002] In recent years, ice disasters have occurred frequently in the power system, and the phenomenon of downed towers and broken lines of transmission lines has been serious, which has brought huge economic losses to our country and seriously affected people's production and life. [0003] The use of the ice-melting device has completely changed the situation in which transmission lines could only passively resist ice in the face of ice disasters, alleviated the disaster situation, and prevented tower collapse and line disconnection accidents. However, it should be pointed out that at present, ice melting is mainly carried out on wires, and ground wires cannot be melted due to the use of segmented insulation or direct grounding and limited operating conditio...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a DC deicing method for ground wires based on discharge gap insulators, aiming at the defect that current overhead ground wires cannot be thawed due to the limitations of segmental insulation or direct grounding operating conditions. , when the overhead ground wire is ice-covered, this method can be used to implement DC icing, thereby improving the ability of the overhead ground wire to resist freezing from rain and snow, and ensuring the safety of the overhead ground wire under severe icing conditions