Overhead line power failure operation site safety verification method based on power grid diagram

Abstract

The invention provides an overhead line power failure operation site safety verification method based on a power grid diagram. The method comprises the following steps: acquiring a power distribution network overhead line diagram of a target area; after a power failure operation instruction is received, traversing each line in the overhead line diagram of the power distribution network to find a target node; marking a grounding wire icon beside the target node; an electric power worker hangs a ground wire at a target node according to the position of a ground wire icon in the overhead line diagram of the power distribution network; and when grounding wires are hung on all the target nodes, performing power-off operation on each line. According to the method, the target node is found by traversing each line in the overhead line diagram of the power distribution network, and the grounding wire is hung on the target node, so that potential safety hazards caused by wrong hanging of the grounding wire or missing hanging of the grounding wire can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution safety, and in particular to a method for on-site safety verification of overhead line power outage operations based on a power grid diagram. Background Art

[0002] The frequency of on-site operations in the distribution network has led to a large proportion of safety accidents in the distribution network. Therefore, preventing on-site accidents in the distribution network has become the main work content of power grid companies at all levels. Due to insufficient investigation of the current status of the frequently changing distribution network, changes in the grid structure in the working area have not been discovered in time, resulting in insufficient safety measures to prevent reverse power transmission, resulting in frequent personal injury and death accidents. Therefore, a scientific tool is needed to remind on-site staff to ensure the perfection of grounding protection measures and prevent personal accidents. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a method for on-site safety verification of overhead line power outage operations based on a power grid diagram.

[0004] To achieve the above objectives, the present invention provides the following solutions:

[0005] A method for on-site safety verification of an overhead line power outage operation based on a power grid diagram, comprising:

[0006] Obtain the overhead line map of the distribution network in the target area;

[0007] When receiving the power outage operation instruction, traverse each line in the overhead line diagram of the distribution network to find the target node;

[0008] Mark the ground line icon next to the target node;

[0009] The power staff installs the grounding wire at the target node according to the position of the grounding wire icon in the overhead line diagram of the distribution network;

[0010] When all target nodes are equipped with grounding wires, power outage operations are performed on each line.

[0011] Preferably, during the traversal process, when the starting node, public transformer and dedicated transformer of the line are detected, they are used as target nodes.

[0012] Preferably, the traversal is performed sequentially from the trunk line to the branch line.

[0013] Preferably, when the traversed line belongs to a trunk line, a grounding wire icon is marked at the public transformer, dedicated transformer or connecting switch at the end of the trunk line, and the section switch in the middle of the trunk line is not marked.

[0014] Preferably, when the traversed line belongs to a branch line, it is necessary to mark a grounding line icon at the public transformer, dedicated transformer or tie switch at the end of the branch line.

[0015] Preferably, each time the power workers install a set of grounding wires at a target node, they take photos and upload the photos to a host computer to check whether the grounding wires are installed correctly.

[0016] Preferably, after the power outage operation is completed, the power workers remove all the grounding wires in sequence, take photos again, and upload the photos to the host computer to verify whether the grounding wires are correctly removed.

[0017] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0018] The present invention provides a method for on-site safety verification of overhead line power outage operations based on a power grid diagram. Compared with the prior art, the present invention traverses each line in the overhead line diagram of the distribution network, finds the target node, and hangs a ground wire on the target node, thereby reducing the safety hazards caused by wrong or missed ground wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A flow chart of a method for on-site safety verification of overhead line power outage operations based on a power grid diagram provided by the present invention;

[0021] Figure 2 A typical schematic diagram of power outage operation of overhead lines in a distribution network provided by the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a series of steps, processes, methods, etc. are not limited to the listed steps, but may optionally include steps that are not listed, or may optionally include other step elements inherent to these processes, methods, products or devices.

[0025] In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] See also Figure 1 , a method for on-site safety verification of overhead line power outage operations based on a power grid diagram, comprising:

[0027] Step 1: Obtain the overhead line map of the distribution network in the target area;

[0028] Step 2: After receiving the power outage operation instruction, traverse each line in the overhead line diagram of the distribution network to find the target node;

[0029] The traversal of the present invention follows the sequence from the trunk line to the branch line.

[0030] During the traversal process, when the starting node, common transformer and dedicated transformer of the line are detected, they are taken as the target node.

[0031] When the traversed line belongs to the trunk line, the grounding wire icon will be marked at the public transformer, dedicated transformer or connecting switch at the end of the trunk line, and the section switch in the middle of the trunk line will not be marked.

[0032] When the traversed line is a branch line, it is necessary to mark the grounding wire icon at the public transformer, dedicated transformer or tie switch at the end of the branch line.

[0033] Step 3: Mark the ground line icon next to the target node;

[0034] Step 4: The power staff installs the grounding wire at the target node according to the position of the grounding wire icon in the overhead line diagram of the distribution network;

[0035] Every time the power workers install a set of grounding wires at a target node, they take photos and upload the photos to the host computer to verify whether the grounding wires are installed correctly.

[0036] Step 5: When all target nodes are connected to ground wires, power off each line.

[0037] When the power outage is over, the power workers remove all the grounding wires one by one, take photos again, and upload the photos to the host computer to verify whether the grounding wires are removed correctly.

[0038] The present invention traverses each line in the overhead line diagram of the distribution network, finds the target node, and hangs the grounding wire on the target node, thereby reducing the safety hazards caused by wrongly hanging the grounding wire or missing the grounding wire.

[0039] See also Figure 2 , Figure 2 The figure shows a typical overhead line diagram of a power distribution network. Line 1 and Line 2 are two different lines that are interconnected and connected by switch 3. Switch 3 is a connecting switch in the normally disconnected state. Switch 1 and Switch 2 are both sectional switches in the normally closed state, which are used to control the power supply status of the trunk line and branch line. The switches are all installed on poles and coexist with surrounding poles in the figure. The public transformer in the figure is a public transformer belonging to the power grid company, which supplies power to 380 / 200 volt low-voltage users, and the private transformer is a 10 kV transformer belonging to the user. When line 1 is out of power, the part from pole F to pole D, including the private transformer branch line, is the working area.

[0040] The present invention is combined with Figure 2 The power outage operation site safety verification method of the present invention is further described as follows:

[0041] 1) After receiving the power outage order, enter the power outage task, determine the power outage line and work area, and immediately start traversing and searching the power line tree; at the same time, prepare to copy the grounding wire symbol.

[0042] 2) Start the traversal method of the power line tree, and the traversal follows the order from the trunk line to the branch line, and then to the next level branch. During the traversal process, when the starting node of the line and key equipment such as the public transformer (public transformer) and the dedicated transformer (special transformer) are detected, a red grounding wire icon is marked next to it.

[0043] 3) For the trunk line: Figure 2The working range is from pole F to pole D. First, the trunk line equipment is retrieved: switch 1, switch 2, public transformer, pole D and switch 3. Since switch 1 and switch 2 are both intermediate nodes of the line, they are ignored. Pole F is the initial node of the working area, pole C is equipped with a public transformer, and pole D with switch 3 is the end node of the line. Therefore, red grounding wire symbols are marked on poles F, C and D respectively.

[0044] 4) After traversing the main line, start traversing the branch line. Figure 2 There is only one branch line in the line, and there is a special transformer on the pole at the end of the line. Therefore, a red grounding wire symbol is marked at pole M.

[0045] 5) After each set of grounding wires is installed, on-site workers need to take photos and upload them to the system to verify the images of the connecting wires and the pole number. After confirmation, the status icon of the grounding wire will change from red to green.

[0046] 6) When all the predetermined grounding marks in the work area turn green, the system will complete the safety verification and issue a message allowing the power outage operation to begin.

[0047] 7) When the work is finished, the workers remove the ground wires one by one and take photos and upload them again. After the system checks the photos again, the ground wire symbol changes color again.

[0048] 8) After the system receives the command to prepare for power supply in the working area, all grounding wire symbols are deleted uniformly. The system can supply power normally. At this point, all work is completed.

[0049] The present invention marks a grounding mark at a place where leakage may occur, and has on-site workers install the grounding wire, thereby avoiding the problem of insufficient protection of the power outage area caused by missing or wrongly hanging the grounding wire.

[0050] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the method disclosed in the embodiment, since it corresponds to the device disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the device part description.

[0051] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram, characterized in that: include: Obtain the overhead line map of the distribution network in the target area; When receiving the power outage operation instruction, traverse each line in the overhead line diagram of the distribution network to find the target node; Mark the ground line icon next to the target node; The power staff installs the grounding wire at the target node according to the position of the grounding wire icon in the overhead line diagram of the distribution network; When all target nodes are equipped with grounding wires, power outage operations are performed on each line.

2. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram as claimed in claim 1, characterized in that: During the traversal process, when the starting node, common transformer and dedicated transformer of the line are detected, they are taken as the target node.

3. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram as claimed in claim 2, characterized in that: The traversal is carried out sequentially from the main line to the branch line.

4. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram as claimed in claim 3, characterized in that: When the traversed line belongs to the trunk line, the grounding wire icon will be marked at the public transformer, dedicated transformer or connecting switch at the end of the trunk line, and the section switch in the middle of the trunk line will not be marked.

5. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram as claimed in claim 3, characterized in that: When the traversed line is a branch line, it is necessary to mark the grounding wire icon at the public transformer, dedicated transformer or tie switch at the end of the branch line.

6. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram as claimed in claim 1, characterized in that: Every time the power workers install a set of grounding wires at a target node, they take photos and upload the photos to the host computer to verify whether the grounding wires are installed correctly.

7. A method for on-site safety verification of overhead line power outage operations based on a power grid diagram as claimed in claim 1, characterized in that: When the power outage is over, the power workers remove all the grounding wires one by one, take photos again, and upload the photos to the host computer to verify whether the grounding wires are removed correctly.

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