Automatic SF6 gas charging system and method of GIS equipment

Abstract

The invention discloses an automatic SF6 gas charging system and method of GIS equipment. The automatic charging system comprises a charging control unit, automatic charging of the GIS equipment is realized and charging conditions are monitored automatically, then the system stops automatically after charging is completed, labor and material consumption is reduced, furthermore, the working efficiency of SF6 gas charging in the GIS equipment is improved effectively, by cooperation of a density relay and a body electronic pressure gauge, whether an alarming contact and a latching contact of thedensity relay act reliably or not can be verified in the charging process through the monitoring result of the body electronic pressure gauge, a working process is simplified while it ensures that theGIS equipment is used safely and reliably, and the efficiency is improved indirectly; according to the automatic charging method, the GIS equipment is automatically charged with SF6 gas by successively carrying out pipe vacuumizing, SF6 gas charging and pressure drop detection operation, the process is simple, the method is convenient and speedy to control, the reliability of the charging processis ensured fully, and thus, the stable performance and safe and reliable use of the GIS equipment are ensured.

Description

technical field [0001] The invention relates to the technical field of GIS equipment in electric power equipment, in particular to a SF6 gas automatic filling system and filling method for GIS equipment. Background technique [0002] In the power industry, GIS equipment refers to sulfur hexafluoride enclosed combined electrical appliances, which is called "Gas Insulated Switchgear" (Gas Insulated Switchgear) internationally, or GIS for short. , including circuit breakers, isolating switches, grounding switches, voltage transformers, current transformers, surge arresters, busbars, cable terminals, inlet and outlet bushings, etc., are organically combined into a whole through optimized design. Since GIS uses SF6 gas with excellent insulation performance and arc extinguishing performance as the insulation and arc extinguishing medium, and seals all high-voltage electrical components in grounded metal cylinders, it has the advantages of small footprint, high operational reliabil...

AI Technical Summary

Problems solved by technology

[0003] As we all know, GIS equipment needs to fill the gas chamber with SF6 gas after vacuuming. The current filling work is mostly done by manpower, which not only needs to be on duty day and night, causing a lot of waste of manpower and material resources. All are manually checked through the pressure gauge and adjusted through the pressure reducing valve. After the filling reaches the rated pressure, manual judgment and related operations are required. The error is large, the controllability is poor, and the reliability is low, which poses a huge safety hazard to the use of DIS equipment.

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