Integral connection method and apparatus for grounding transformer and arc suppression coil

Abstract

The invention relates to an integral connection method and apparatus for a ground transformer and an arc suppression coil. A primary neutral point of an oil-immersed grounding transformer can be connected with a head end of an arc suppression coil; a grounding transformer oil tank can be connected with an arc suppression coil oil tank via an enclosed connection cylinder; the connection cylinder is filled with transformer oil; in the connection cylinder, a cable lead out of the primary neutral point of the grounding transformer is connected with a cable lead out of the head end of the arc suppression coil via a joint device and a current-carrying connection member to achieve current carrying; and the current-carrying connection member is formed by an internal hard metal conductor and an external insulation layer. The arc suppression coil oil tank is communicated with the grounding transformer oil tank via the enclosed connection cylinder; the current-carrying wiring device is disposed in the connection cylinder; compared with a traditional casing pipe connection way, the connection way is reliable and possesses high operation safety coefficient; small land is occupied; the integral connection apparatus structure is compact; and little equipment investment is required and simple installation and maintenance can be realized.

Description

technical field [0001] The invention relates to the technical field of current-carrying connection between an oil-immersed grounding transformer and an arc suppression coil, in particular to an integrated connection method and device for a grounding transformer and an arc suppression coil. Background technique [0002] In modern power systems, it is required that the grounding transformer must be connected to the arc-suppression coil at the same time. At present, when the oil-immersed grounding transformer is connected to the arc-suppression coil, the isolation knife switch is usually used. The grounding transformer must be equipped with a neutral point bushing, and the arc-suppression coil It is also necessary to set up the high-voltage bushing at the head end, and the two are connected by an overhead cable. The overhead connection needs to be installed with post insulators. The wiring is more complicated, which increases the area of ​​the line corridor of the substation and...

AI Technical Summary

Problems solved by technology

[0002] In modern power systems, it is required that the grounding transformer must be connected to the arc-suppression coil at the same time. At present, when the oil-immersed grounding transformer is connected to the arc-suppression coil, the isolation knife switch is usually used. The grounding transformer must be equipped with a neutral point bushing, and the arc-suppression coil The high-voltage bushing at the head end must also be installed, and the two are connected by overhead cables. The overhead connection needs to be installed with post insulators. The wiring is more complicated, which increases the area of ​​the line corridor of the substation and increases the workload of equipment maintenance.

The maintenance cost is high and the operation safety factor is low, so the best effect cannot be achieved in the electrical operation

Images