Operating method and device for replacing 10kV pole-mounted drop-out fuse

Abstract

The invention relates to the technical field of 10kV distribution network load operation, in particular to an operating method and device for replacing a 10kV pole-mounted drop-out fuse. A self-extinguishing bypass drop-out fuse is taken as temporary bypass equipment for shunting a drop-out fuse to be replaced in order to fulfill the aim of converting charge, so that the drop-out fuse to be replaced is replaced after exiting from operation. Compared with the prior art, the method has the beneficial effects that (1) the self-extinguishing drop-out fuse is taken as shunting equipment, so that the technical condition for charged replacement of the drop-out fuse is satisfied, and the operation difficulty is lowered; (2) stable connection of the shunting equipment and an electric pole is completed by adopting an insulating lifting bracket, so that enough safety distance can be provided for operating personnel, and the problems of small equipment interval and incapability of mounting the shunting equipment are solved; (3) the method is consistent with the technical characteristics of the national charged operation in China, charged replacement of the drop-out fuse is realized, and economic losses of downstream power utilization enterprises and residents caused by power cut are avoided.

Description

technical field [0001] The invention relates to the technical field of 10kV distribution network under-load operation, in particular to an operation method and device for replacing a 10kV drop-out fuse on a column. Background technique [0002] At present, the live operation of distribution network is the main research direction of distribution network operation technology, and the live operation is the main means to solve the non-stop operation of distribution network. In the operation method of replacing a 10kV drop-out fuse with load, it is conventional to use an insulated drain wire to short-circuit and shunt to replace the fuse. Since the drop-out fuse has the characteristic of cutting off current, the shunt device must be considered when replacing the drop-out fuse with load. There are potential safety hazards in shunting operations directly with insulated drain wires. For example, when the drop-out fuse to be replaced is in the cut state and the other two-phase drop-o...

AI Technical Summary

Problems solved by technology

In the operation method of replacing a 10kV drop-out fuse with load, it is conventional to use an insulated drain wire to short-circuit and shunt to replace the fuse. Since the drop-out fuse has the characteristic of cutting off current, the shunt device must be considered when replacing the drop-out fuse with load. There are potential safety hazards in shunting operations directly with insulated drain wires. For example, when the drop-out fuse to be replaced is in the cut state and the other two-phase drop-out fuse is in the closed position (this is the most common situation), if using Connecting the lead wire with load on the insulated drain wire will generate arc light at the lead position, and when the arc light is too large, it will cause burns to the operator. Therefore, it is currently forbidden to connect the lead wire with load in live work. In the cut state, it is impossible to use the insulated drain wire to short-circuit the equipment and perform load replacement

[0003] At the same time, this operation method is not suitable for many applications, such as the replacement of ordinary double-column transformers, insulating transformers, and drop-out fuses in branch lines. There are generally insufficient safety distances for operators, small gaps in equipment, and inability of shunt equipment. Technical difficulties such as installation are not conducive to the promotion and use of this operation method

Images