A 10kv distribution network cable line fault self-healing protection control method and intelligent complete equipment

Abstract

The invention provides a 10kV distribution network cable line fault isolation and self-healing protection control method and intelligent complete set of equipment, which decomposes the distribution network structure into small area distribution networks, and each small area distribution network topology structure The information is automatically generated by GPS positioning technology, and an intelligent decision-making center is set up in the small-area distribution network, and information is exchanged safely with other equipment in the area through a wireless communication network, and analyzed according to the regional topology, distributed algorithms, and transient quantity analysis methods Judging, determining the fault area, and completing the isolation and power restoration of the fault area can greatly improve the automation level of the cable network feeder, quickly remove and isolate various faults, and realize rapid power restoration of the non-fault area.

Description

technical field [0001] The invention relates to the field of distribution network automation, in particular to a protection control method and intelligent complete equipment suitable for self-healing faults of 10kV distribution network cable lines. Background technique [0002] 10kV distribution network overhead line feeder automation has been developed for more than ten years. Its technology and products have been very mature and widely used. A high-speed and reliable communication network is difficult to build on a large scale, and its development has been relatively slow over the years. With the in-depth construction of intelligent distribution network, it can be predicted that improving the automation level of cable network feeders will be another major development direction in the next ten years. Cable network feeder automation mode, and based on this mode, carried out in-depth research on related technologies, and designed distributed intelligent automatic ring networ...

AI Technical Summary

Problems solved by technology

[0003] (1) The operation mode of the conventional distribution network automation system mainly relies on the distribution network master station system to realize the fault handling. Once the distribution network master station system has a problem, the entire distribution network automation will be paralyzed

[0004] (2) Large-scale centralized communication methods are prone to data broadcast storms and information congestion, which will also lead to paralysis of distribution network automation

[0005] (3) The construction of optical fiber communication lines in the distribution network can only be transformed on the basis of the existing distribution network structure, which requires coordination of various aspects of work, including urban planning, etc., and the structure of the power grid is complex, with many points and wide areas, and laying optical fibers Complicated communication, long construction period and high construction cost

[0006] (4) Conventional wireless communication uses the public mobile communication network. Although it has the advantages of large signal coverage area, low construction cost, low operating cost, convenient implementation, and convenient maintenance, there are security problems

[0007] (5) Reconstruction and expansion of power distribution lines lead to changes in the grid structure, and the topology of the distributed automation system also needs to be adjusted accordingly, and the maintenance is more complicated and cumbersome

[0008] (6) Various types of switch cabinets at home and abroad coexist, which is troublesome to operate, manage and maintain. At the same time, the action characteristics of various switch manufacturers are not the same, and the energy required for the operating mechanism is also not the same. It is easy to have a complete set of matching problems, resulting in unsuccessful opening and closing.

[0009] (7) The accuracy of single-phase ground fault location and isolation needs to be further improved;

[0010] To sum up, the current existing cable network feeder automation technology has the defects of not having an effective, practical, reliable, advanced cable network feeder automation mode, multiple types of switches, complicated management, single or impractical protection algorithms

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