Distribution line fault processing method based on 5G communication modules

A fault handling method and power distribution line technology, which is applied to circuit devices, AC network circuits, electrical components, etc., can solve problems such as difficulty in coordinating fixed values ​​between switches, incoordination of time level differences, abnormal line fault handling, etc., to achieve It is convenient for equipment commissioning, installation and maintenance, reduces workload, and has the effect of fast fault isolation time

Pending Publication Date: 2021-06-22
西安兴汇电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Centralized feeder automation has high flexibility and strong adaptability, but if the distribution lines adopt the centralized feeder automation mode, not only laying optical cables will consume a lot of resources, but the main power distribution station will also be under tremendous pressure
Recloser-type in-situ feeder automation requires the substation outlet switch to be overlapped multiple times to cooperate, resulting in multiple impacts on the primary grid and multiple short-term incoming calls at the user end, which is likely to cause damage to the primary grid and to users. Bring bad electricity experience
[0004] Distributed on-site feeder automation can quickly handle faults, but it has high requirements for network communication and requires the laying of optical cables, which is expensive and difficult to operate and maintain
[0005] Traditional on-site feeder automation needs to cooper

Method used

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  • Distribution line fault processing method based on 5G communication modules
  • Distribution line fault processing method based on 5G communication modules
  • Distribution line fault processing method based on 5G communication modules

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0078] Example 1

[0079] Method of short-circuit fault processing:

[0080]Its fault judgment principle: When the line is short-circuited, the upstream current of the short-circuit fault point increases. The current changed in the downstream of the fault point is not large, so the terminal device at the upper reaches of the fault point will detect the fault large current, located downstream of the fault point downstream The terminal device is detected or the load current at the normal operation of the line. If the terminal device detects the fault large current, the switch is separated, the terminal device downstream of the fault point can detect the line in an outstanding state, and the two terminal devices connected to the topology detected the fault large current and line loss, respectively. When pressed, the fault point is located between the two terminal devices.

[0081] Treatment implementation Figure 3 to 8 As shown: If the substation protection is free, and the value is ...

Example Embodiment

[0082] Example 2;

[0083] The method of grounding fault processing, the principle of fault judgment is that the overhead line can be divided into a large current grounding system and a small current grounding system in accordance with the substation neutral point. The large current grounding system refers to the neutral point direct grounding system and The neutral point is subjected to a small-resistant grounding system, and the small current grounding system refers to the neutral point unwaffed system and the neutral point through the arc coil grounding system. In the distribution line, the application is the most small current grounding system, but in recent years, with the increase in urban cable lines, it is increasingly possible.

[0084] In the distribution line, for the neutral point is not grounding system, when the line is uniformly fault, the zero sequence voltage on the line occurs, the zero sequence current direction upstream of the ground point is the line flow to t...

Example Embodiment

[0088] Example 3:

[0089] The method of disconnection fault is: the principle of fault judgment is: As the application of insulation wire applications, ground faults and short-circuit faults in distribution line failures are less and less, and the proportion of disconnection faults But more and more. In the distribution line, the single-phase disconnection can be divided into three types: the first is the breakpoint is not grounded; the second is the side of the breakpoint power supply; the third is a breakpoint load side. When the breakpoint is not connected, the three-phase voltage upstream of the breakpoint is still in a balanced state, and the three line voltage constant, but the current of the fault loop fault phase decreases, and the current reduction of the fault loop fault phase and The location of the disconnection fault occurs, the closer of the fault occurs, the more the substation is reduced, and the non-fault phase current angle will become large. The three-phase vol...

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Abstract

The invention discloses a power distribution line fault processing method based on 5G communication modules. A power distribution master station, terminal equipment, 5G network communication modules and a line tower are included, the power distribution master station, a regional terminal and a unit terminal are all provided with the 5G network communication modules, the power distribution master station is wirelessly connected with the regional terminal through the 5G network communication modules, and the regional terminal and the unit terminal are wirelessly connected through the 5G network communication module. The beneficial effects of the method are that the unit type terminal and the regional type terminal cooperate with each other through the 5G network communication module, so the accuracy of fault judgment can be improved, the time for fault isolation and non-fault area power supply recovery is shortened, and the workload of operation and maintenance personnel is reduced; the operation states of the line and the intelligent transformer area can be monitored in real time, so operation and maintenance personnel are reminded of problems and risk points existing in line operation, and the frequency of line faults is reduced; and the frequency of short-time power failure of lines is reduced, the service time of equipment is prolonged, and the power utilization experience of users is improved.

Description

technical field [0001] The invention relates to the technical field of fault handling of power distribution lines, in particular to a fault handling method for power distribution lines based on a 5G communication module. Background technique [0002] In the existing technology, 10kV distribution lines are widely distributed, the operating environment is complex, and faults occur frequently. For the problem of how to quickly locate and isolate the fault after a short-circuit fault occurs on the distribution line, and restore the power supply in the non-faulty area, the current solution is to use a centralized feeder Automatic and on-site feeder automation are solved, such as Chinese patents: 1. Distribution network fault handling method using area blocking (public number: CN105552858B;); 2. Adaptive on-site feeder automatic fault handling based on area serial number Method (publication number: CN109245072B); 3. The technical solutions of a deep learning-based distribution net...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J13/00
CPCH02J3/0012H02J3/00125H02J13/00022Y02E60/00Y04S40/126
Inventor 郭琳云甘兴林潘琦张建涛班诗淇
Owner 西安兴汇电力科技有限公司
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