DTU station live-line rapid point-aligning method and DTU station live-line rapid point-aligning device

Abstract

The purpose of the invention is to solve the problem of long time consumption of graph and model transaction re-pointing work in the prior art. Therefore, the invention provides the DTU station live-line rapid point-aligning method and device, a plug of the DTU station live-line rapid point-aligning device is inserted into a DTU terminal screen, an on-site worker operates the DTU station live-line rapid point-aligning device, telemetering is carried out by pressing a button on the device, switching-on and switching-off of a switch and different position states of ground knife position operation are simulated, and the DTU station live-line rapid point-aligning device is operated by the on-site worker. Generating an analog electric signal; the analog electric signal is uploaded to a master station; field personnel confirm that the master station receives corresponding control information through communication connection; the background issues a pre-control instruction for remote control point checking, the corresponding change of the indicating lamp is observed according to the control instruction, and the change is fed back to the master station, so that the automatic point table checking work of the master station and the field terminal is completed. According to the technical scheme, a large amount of working time is saved. In addition, no technical threshold exists in use, and point alignment work can be easily carried out.

Description

Technical Field

[0001] The present invention belongs to the technical field of power distribution automation in an electric power system, and in particular relates to a method and a device for fast point-to-point alignment of a DTU site under power. Background Art

[0002] As an important part of the new power system, the distribution network is responsible for the balance, safety and stability of the system. In this process, DTU plays a key role in remote data transmission and is widely used in many fields such as power and environmental monitoring. It is responsible for sending the data collected by field equipment to the remote data center. The closely related graphics, namely the graphical model, covers the site geographical location map, equipment connection relationship map, network topology map and other contents, aiming to help operation and maintenance and engineering personnel to intuitively grasp the DTU site layout, equipment composition and operation status. However, in actual use, sometimes the graphics content does not match the actual situation due to changes. For example, in the daily operation and maintenance of the main station of the distribution automation system, due to line cutover, relocation, commissioning and other reasons, the site location and layout are adjusted, the site is moved due to engineering transformation, and the equipment installation location and orientation are changed; there are also changes in equipment parameters, such as the communication baud rate and IP address of DTU are modified. These parameters are marked in the graphics. Once changed, the graphics need to be updated to adapt to the actual situation, which causes the graphics to change. After the power supply station is completed and the background is re-uploaded, and the master station has reconfigured the automation point information associated with the diagram, the distribution automation operation and maintenance personnel need to go to the site to verify the three remote points. There are many situations in which changes are caused. For example, when there is an increase, decrease or replacement of equipment in the site, the new equipment is not presented in the diagram, or the new equipment does not match the old icon; the equipment connection relationship has changed, and the original RS-485 interface connection has been changed to an Ethernet connection, which makes the connection part of the diagram no longer true.

[0003] Corresponding processing solutions have also been developed in the prior art. For example, the invention patent "Automatic Identification Method for Feeder Sets Associated with Distribution Automation Graph Model Changes" with patent number 202110961266.2 records a method for automatic identification of feeder sets associated with distribution automation graph model changes. Starting from the planned power outage maintenance order of the OMS system, the distribution automation master station system interacts with the OMS system, and extracts key model information such as switchgear and its feeders to be added, deleted, and modified according to the change content and drawings of the planned work order. Relying on the equipment topology node number in the distribution automation master station system and using the deep graph traversal algorithm, the entire distribution network topology structure is automatically traversed in the distribution automation master station system, and all single-line diagrams associated with the change order are searched and identified to form a change feeder set, thereby guiding the source-end maintenance of the graph model on the PMS side. This invention greatly reduces the workload of manual identification, while improving the effectiveness and accuracy of distribution automation graph model changes.

[0004] However, in order to ensure safety, such a technical solution still needs to start with the OMS system planned power outage maintenance order for re-pointing. The specific process is roughly divided into three parts: the on-site personnel operate the actual equipment running with power, such as turning the switch to the closed or open position, and the built-in travel switch and other sensors of the equipment convert the equipment status into an electrical signal. The electrical signal is input to the on-site distribution terminal unit (DTU), and the terminal collects telemetry, telesignaling, remote control and other information, and then transmits the information to the main station through the communication mode. At this time, the on-site personnel communicate with the main station personnel by phone to check the information such as the switch closing and opening status collected by both sides, so as to verify whether the automation point table of the main station and the on-site terminal is consistent; the operation process requires manual disassembly of the secondary line, short-circuiting of the secondary line or the measurement node channel to assist in verification, which is relatively dangerous.

[0005] Although this ensures that the final detection results are more accurate, the process takes a very long time and it is difficult to reduce this time through conventional technology. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the re-pointing work of the image model change takes a long time in the prior art. To this end, the present invention provides a DTU site live fast point-to-point method, including the steps of:

[0007] Bring the DTU site live fast point-to-point device to the distribution station, unplug the plug on the DTU terminal screen to be connected, and then plug in the DTU site live fast point-to-point device. The on-site personnel call the master station backstage to check the dual naming of the site and switch cabinet;

[0008] The on-site staff operates the DTU site live fast point-to-point device, performs telemetry by pressing the button on the device, simulates the closing and opening of the switch, and the different position states of the ground knife position operation, and generates analog electrical signals; the analog electrical signals are uploaded to the master station; at this time, the on-site staff confirms through communication that the master station has received the corresponding control information;

[0009] Before remote control, on-site personnel connect to the main station personnel through communication to check the switch status, determine the current switch position and obtain confirmation from the background; the background issues pre-control instructions, and according to the control instructions, observe the corresponding changes of the indicator lights, and feed back the changes to the main station; in this way, the automated point table verification work between the main station and the on-site terminal is completed. The operation is convenient and efficient, and a single interval operation can generally be completed within 6 minutes.

[0010] After completing the work, reconnect the plug on the original DTU terminal screen.

[0011] Preferably, after inserting the aviation plug of the DTU site's energized rapid point-to-point device into the corresponding interval of the DTU on site, the specific steps for operating the DTU site's energized rapid point-to-point device to simulate closing the switch are: pressing the closing button, the relay is energized, and its normally open auxiliary contacts are closed, and the switch closing information is obtained through the communication connection background verification, which means that the remote signal closing is successful; the specific steps for operating the DTU site's energized rapid point-to-point device to simulate opening the switch are: the two auxiliary contacts are connected to the remote signal opening circuit through the aviation plug, and an opening signal is sent to the background, and the switch opening information is obtained through the communication connection background verification; it means that the remote signal opening is successful.

[0012] Preferably, the universal rotary switch is manually turned to close the "remote", "local" and "ground switch closing" contacts respectively, and then connected to the remote signal input circuit through the aviation plug, and the corresponding state change with the background master station is obtained through the communication connection background check. In this way, the remote signal signals such as the opening and closing positions of each interval load switch, the opening and closing positions of the ground switch, and the opening and closing positions of the remote local handle can be smoothly simulated in the remote signal stage, and sent to the background to confirm the completion of the remote signal matching.

[0013] Preferably, before remote control, the DTU site's live fast point-to-point device is adjusted to the state of waiting for the control-on command to be issued, and after verifying that the control-on command has been issued through the communication connection background, the indicator light is observed to change from the open position to the closed position; after verifying that the control-off command has been issued through the communication connection background, the indicator light is observed to change from the closed position to the open position. In this way, during the remote control stage of the master station, the on-site operator only needs to observe the changes in the device indicator light to determine whether the remote control point and the remote control contact action are correct, and then complete the remote control point-to-point.

[0014] Preferably, the communication connection between the on-site personnel and the main station backend includes telephone communication and preset verification process options on the operation panel.

[0015] Before unplugging the plug on the DTU terminal screen to be connected, use the DTU device's built-in detection software to check the operating status of the DTU device, and then plug in the DTU site's powered fast connection device's aviation plug to confirm the connection is successful again. This can avoid subsequent work instability caused by the DTU device's own failure.

[0016] The present invention also includes a DTU site live rapid point-to-point device, including a shell, on which an opening and closing indicator light is installed, and at least a power supply circuit function module, a remote signal circuit function module, and a remote control circuit function module are arranged in the shell. All functional modules in the shell are connected to the main aviation plug, and the portable aviation plug is used to connect with each interval in the DTU screen. The power supply circuit module converts the external 220V AC into 48V DC, which is used to power the entire device to ensure the normal operation of the three functional circuit modules. The remote signal circuit module realizes the simulated transmission of the load switch opening and closing positions and the earth knife opening and closing positions through the opening and closing buttons and switches; the remote control circuit module connects a pair of opening and closing control contacts of the DTU in series into the circuit, and lights the opening and closing indicator light when the remote control opening and closing is successful.

[0017] Preferably, in the AC power supply part of the power circuit function module, the live wire is connected to one end of the switch through the terminal, and the neutral wire is connected to the other end. The switch is used to control whether the AC power supply can be connected to the power module; the power module outputs DC 48V, and its positive and negative poles are connected to the corresponding ends of another switch through the terminals. In this way, the 220V AC is converted into a DC 48V power supply and output from the module.

[0018] Preferably, a plurality of terminals are arranged on one side of the remote signaling circuit function module, and the terminals are connected to relays for realizing the functions of signal conversion and circuit on-off; the other side of the remote signaling circuit function module is connected to the DTU, and is provided with a normally open auxiliary contact for the open state, a normally closed auxiliary contact for the closed state, a conversion switch for switching between local and remote control, and a remote signaling common point. The entire remote signaling circuit function module can flexibly realize the switching between local and remote operation modes, accurately monitor the real-time status of the equipment, and efficiently complete the transmission of remote signaling signals.

[0019] Preferably, the remote control circuit function module is a dual-position self-holding remote control module, and the dual-position self-holding remote control module is connected to the power supply circuit function module; the local closing and remote control closing modules meet different operation requirements to realize the equipment closing action, the local closing is controlled by the closing button, after pressing, the current causes the contactor to be attracted through the relevant components, and the remote control closing is driven by an external control signal to drive a specific relay, and other components are linked to achieve closing; correspondingly, there are also local opening and remote control opening modules, the local opening presses the opening button to disconnect the contactor circuit, and the remote control opening controls the corresponding relay through an external signal to realize opening; the circuit end is provided with a closing indication and an opening indication module for connecting the opening and closing indicator lights, and the opening and closing indicator lights present the current working state of the circuit. The opening and closing indicator lights include a closing indicator light and an opening indicator light; the closing indicator light is on when closing, and the opening indicator light is on when opening.

[0020] Compared with the prior art, the technical solution described in the present invention has the following advantages:

[0021] Beneficial effects:

[0022] 1. The point-to-point method in the prior art requires the live disconnection and connection of relevant secondary lines in the secondary compartment of the ring main unit for point-to-point, which poses personal safety risks such as mistaken disconnection, wrong wiring, and electric shock. The present invention uses a DTU site live fast point-to-point device, which does not require live disconnection and connection of secondary lines. It can directly unplug and plug the aviation plug, without any safety risks.

[0023] 2. The existing point-to-point method requires the use of a multimeter to measure the on / off and short-circuit of the remote control contacts to verify the correctness of the remote control and remote signaling points, which requires at least two people to cooperate. The present invention uses a DTU site live fast point-to-point device to save a lot of working time.

[0024] 3. In the prior art, it is necessary to be very familiar with the secondary circuit wiring conditions in the ring main unit in order to perform point alignment. The DTU site live fast point alignment device of the present invention does not have any technical threshold and can easily carry out point alignment work.

[0025] The above invention content is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0027] Figure 1 This is a schematic diagram of the time consumption of each link of the DTU single-interval point-to-point work in the prior art.

[0028] Figure 2 It is intended to analyze the situation in which each link of the DTU single-interval point-to-point work in the prior art results in excessive time consumption.

[0029] Figure 3 It is a schematic diagram of an overall module of a DTUDTU site live rapid point-to-point device provided in an embodiment of the present invention.

[0030] Figure 4 The present invention provides a circuit diagram of a power supply circuit function module of a DTUDTU site live rapid point-to-point device provided in an embodiment of the present invention.

[0031] Figure 5 The present invention provides a circuit diagram of a remote signaling circuit function module of a DTUDTU site live rapid point-to-point device.

[0032] Figure 6 The present invention provides a circuit diagram of a remote control loop function module of a DTUDTU site live fast point-to-point device provided by an embodiment of the present invention.

[0033] Figure 7 This is a comparison chart of the average time consumption of a single-interval DTU point-to-point in the present invention and the prior art. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. A process can be terminated when its operations are completed, but can also have additional steps not included in the accompanying drawings; a process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0036] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. It should also be understood that in various embodiments of the present invention, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0037] It should be understood that, in the present invention, "multiple" means two or more. "And / or" is only a variable relationship that describes associated objects, indicating that three relationships may exist. It should be understood that, in the present invention, "B corresponding to A", "B corresponding to A", "A corresponds to B" or "B corresponds to A" means that B is associated with A, and B can be determined based on A. Determining B based on A does not mean determining B based only on A, but B can also be determined based on A and / or other information. The match between A and B means that the similarity between A and B is greater than or equal to a preset threshold.

[0038] The present invention is used for the master station to reconfigure the automation point information associated with the model, and the distribution automation operation and inspection personnel go to the site to check the three remote points to ensure the consistency of the master station and the on-site DTU point number sequence. For easy understanding, some of the terms involved are explained below:

[0039] DTU: Distribution Terminal Unit, used for multi-circuit data collection, communication and management of ring network cabinets and substations.

[0040] Diagram model change: specifically refers to the situation where the automation point number associated with the primary equipment topology diagram of the DTU site of the distribution automation master station is deleted or overwritten due to various reasons, resulting in the inability to upload and issue automation information normally.

[0041] Point-to-point: Through the cooperation between the site and the master station, various methods are used to simulate the displacement of the three-remote information of the primary equipment on site to verify the correctness of the automated three-remote information uploaded and issued at each interval.

[0042] The above-mentioned point-to-point process takes actual work as an example in the prior art. The work time is based on the end time of the work ticket and the permission time of the work ticket. Considering that the workload of point-to-point after each model change is not necessarily the same, after statistics on the average time spent on point-to-point in a single interval, it is found that the average time spent on point-to-point by maintenance personnel in a single interval is 12.2 minutes. The applicant conducts statistical analysis on the average time spent on each link of the point-to-point work after the model change, such as Figure 1 shown.

[0043] T 单间隔对点平均耗时 =T 工作准备 +T 安措布置 +T 遥测对点 +T 遥信对点 +

[0044] T 遥控对点 +T 工作终结 =0.7+1.1+2.1+3.2+4.6+0.5=12.2min

[0045] It can be seen that in the entire process of point-to-point, due to the involvement of multiple operation steps such as on-site diagram verification, secondary disconnection safety measures, contact on-off measurement, etc., the telesignaling and remote control point-to-point took the longest time, a total of 7.8 minutes, accounting for 64% of the total time of the entire point-to-point work, and the telemetering point took an average of 2.1 minutes, accounting for 17% of the total time of the entire point-to-point work. The on-site investigation found that the telemetering point-to-point needs to use test equipment to add current to the secondary circuit. After multiple tests, the team found that there is no room for compression in the time of telemetering point-to-point.

[0046] On this basis, the applicant conducted a technical analysis and identified and confirmed the main reasons for the long time required for the re-pointing work of the distribution network model change in the existing technology, such as Figure 2 shown.

[0047] In this regard, the applicant has designed a device specifically for DTU rapid alignment, such as Figure 3 As shown, it includes a shell, on which an opening and closing indicator light is installed. At least a power supply circuit function module, a remote signal circuit function module, and a remote control circuit function module are arranged in the shell. All the function modules in the shell are connected to the main aviation plug. The portable aviation plug is used to connect with each interval in the DTU screen. The power supply circuit module supplies power to the entire device. The remote signal circuit module realizes the analog transmission of the opening and closing positions of the load switch and the opening and closing positions of the earth switch through the opening and closing buttons and switches; the remote control circuit module connects a pair of opening and closing control contacts of the DTU in series into the circuit, and lights the opening and closing indicator light when the remote control opening and closing is successful.

[0048] like Figure 4 The power module (DY1) is shown. In the power input link, the AC power is connected to the module, where the live wire ACL is connected to one end of the switch K1 through terminal 1D:25, and the neutral wire AC N is connected to the other end of the switch K1 through terminal 1D:24. Switch K1 controls the on and off of the AC power. Its internal circuit is that pins ① and ② are related to the live wire path, and pins ③ and ④ are related to the neutral wire path, thereby controlling whether the AC power can enter the power module smoothly. The output of the power module is DC 48V, marked as +KM1 and -KM1.

[0049] +KM1 is connected to one end of switch K2 via terminal 1D:1, and -KM1 is connected to the other end of switch K2 via terminal 1D:5; switch K2 is responsible for controlling the output of the DC 48V power supply, and its pins ② and ④ correspond to the + and - output terminals of the DC power supply respectively. By operating switch K2, it can be determined whether the DC 48V power supply is output from the power module. Overall, the figure clearly shows the input and output connections of the power module, as well as the working principle of flexibly controlling the power on and off with the help of the switch.

[0050] and Figure 5The figure shows a universal transfer switch type telesignal module, which includes input and output connections. There are multiple terminals marked as 1D:13, 1D:14, 1D:15, 1D:16, and 1D:17 on the left side of the circuit. These terminals are connected to different components respectively. The right side is connected to the DTU. There are normally open auxiliary contacts (open position), normally closed auxiliary contacts (closed position), and connection points with different functions such as transfer switch normally closed (local), transfer switch normally open (remote), transfer switch normally open (ground knife closed position) and telesignal common point. KA1 and KA2: These two relays are set between terminals 1D:13 and 1D:14 to realize signal conversion and amplification. KN: There are multiple KN components in the circuit, which are connected between different terminals. These may be contactors or relays, which are used to control the on and off of the circuit. X-COM: This is a common point used to connect other external circuits or as a reference potential. Normally open auxiliary contacts (open position) and normally closed auxiliary contacts (closed position) are used to realize the connection and disconnection of the circuit in different states. The transfer switch normally closed (local), transfer switch normally open (remote) and transfer switch normally open (ground switch closed position) are used to realize the switching between local and remote control, as well as the monitoring of the ground switch closed position. The remote signal common point (X-COM) is used to transmit the remote signal signal, and transmit the status signal of the local device to the master station.

[0051] like Figure 6 Two-position self-retaining remote control module shown.

[0052] As shown in the figure, from left to right, the functional modules include control power supply, local closing, remote closing, local opening, remote opening, closing indication and opening indication. There are two contactors, marked as +KM and -KM. They are used to control the on and off of the circuit. +KM and -KM control the positive and negative poles of the circuit or different power supply lines respectively. There are multiple relays KA in the figure, which are used to realize the logic control of the circuit and play a role in different control paths. The closing circuit includes local closing and remote closing. Local closing is controlled by HG (closing button), and remote closing is controlled by HG (closing button) and KA (13), KA (14) relays. The opening circuit includes local opening and remote opening. Local opening is controlled by HR (opening button), and remote opening is controlled by HR (opening button) and KA (11), KA (12) relays. The indication circuit also includes closing indication: the closing status is displayed by HR and HG indicator lights. And opening indication: the opening status is displayed by the HR and HG indicator lights.

[0053] When working, the control power is connected to the circuit through the +KM and -KM contactors to provide power for the entire control circuit. Local closing: Press HG (local closing button), and the current passes through HG, KA (13), KA (14) and other components to make the contactors +KM and -KM close and realize the closing operation. Remote closing: Through the external control signal, the KA (13) and KA (14) relays are closed, and the current passes through HG, KA (13), KA (14) and other components to realize the closing operation.

[0054] Opening operation: Local opening: Press HR (local opening button), and the current will flow through HR, KA (11), KA (12) and other components, disconnecting the contactors +KM and -KM to achieve opening operation. Remote opening: The KA (11) and KA (12) relays are closed by an external control signal, and the current will flow through HR, KA (11), KA (12) and other components to achieve opening operation.

[0055] The closing and opening indications display the circuit working status through the HR and HG indicators. When the circuit is closed, the closing indicator lights up; when the circuit is open, the opening indicator lights up.

[0056] Through the above structure, the whole device can realize remote signaling and remote control on-site on the DTU screen. Insert the device's aviation plug into the corresponding interval of the DTU on site, press the control-on button or issue a control-on command in the background, and the relay KA1 is energized, its normally open auxiliary contacts are closed, and the closing indicator HG in the circuit lights up, indicating that the remote control closing is successful. At this time, the contacts 9-10 of the KA1 relay are closed, and the contacts 9-10 of the KA2 relay are disconnected. The two pairs of contacts are connected to the remote signaling input circuit through the aviation plug, and the position signal 0 1 is sent. The background displays the switch closing position; after pressing the control-off button or issuing a control-off command in the background, the relay KA2 is energized, its normally open auxiliary contacts are closed, and the closing indicator HR in the circuit lights up, indicating that the remote control opening is successful. At this time, the contacts 9-10 of the KA2 relay are closed, and the contacts 9-10 of the KA1 relay are disconnected. The two pairs of contacts are connected to the remote signaling input circuit through the aviation plug, and the position signal 1 is sent. 0, the backstage displays the switch position; manually turning the universal conversion switch can realize the closing of the three auxiliary contacts 1-2, 3-4, and 5-6 in sequence. These three auxiliary contacts correspond to the "remote", "local", and "ground switch closing" signals of the backstage master station respectively. These three auxiliary contacts are connected to the remote signal input circuit through the aviation plug, so as to realize the ground switch opening and closing position and the remote and local handle position simulation of the cabinet.

[0057] In this way, by pressing the device's opening and closing buttons and turning the universal transfer switch, the remote signaling signals such as the opening and closing positions of each interval load switch, the opening and closing positions of the ground knife, and the opening and closing positions of the remote local handle can be easily simulated and sent to complete the remote signaling point-to-point; when the master station remotely controls the device, the correctness of the remote control point position and the remote control contact action can be judged by observing the changes in the device indicator lights to complete the remote control point-to-point.

[0058] After completing the work, reconnect the plug on the original DTU terminal screen.

[0059] It should be noted that it is different from the traditional DTU point-to-point method in the prior art. In the prior art, it is necessary to dismantle the wire ends in the running ring network cabinets one by one to simulate the point-to-point, which poses risks of electric shock, accidental disconnection and connection of secondary lines, and equipment malfunction. When using the newly developed portable DTU point-to-point device for point-to-point operations, you only need to complete the aviation plug connection on the DTU to align the points, and there is no need to disconnect the secondary lines in each interval secondary compartment to simulate the point-to-point. This completely avoids the safety risks of accidental disconnection, misconnection, and even equipment malfunction of the traditional point-to-point method, greatly improving the safety of point-to-point work.

[0060] As an important part of the new power system that "supports the main grid and connects users", the distribution network bears the responsibility of system balance, safety and stability. The social benefit of the newly developed portable DTU point-to-point device is that it promotes the improvement of the level of lean management of distribution network automation, and has a good role in reducing power outages and improving power supply reliability. For the company, it improves customer service satisfaction, effectively reduces complaints, and establishes a good corporate image; for users, it shortens the power outage duration, improves the power supply reliability of the line, reduces corporate economic losses, and improves the living standards of residents; for society, it avoids the risk of public opinion caused by excessive power outages and maintains social stability.

[0061] In terms of improving work efficiency, the developed point-to-point device is used for verification work, which simultaneously reduces the workload of the distribution master station support personnel and on-site terminal operation and inspection personnel, and greatly shortens the DTU single-interval point-to-point time. Figure 7 As shown in the figure, the time has been reduced from 12.2 minutes to 5.8 minutes, a reduction of 52%, which greatly improves work efficiency.

[0062] In terms of saving labor costs, the newly developed portable DTU point-to-point device is light in weight and easy to operate. Two people can easily complete the remote signaling and remote control point verification of all intervals of the DTU site (one person monitors, one person operates). Compared with the traditional point-to-point method that requires three people to cooperate (one person monitors, two people operate), the labor cost of point-to-point work is reduced by 1 / 3; since the adoption of the technical solution of the present invention, the point-to-point work can save 1 person's labor cost (about 300 yuan) every day, and a district power company can save 42,000 yuan for about 140 point-to-point work per year. And the device is low-cost. Calculated based on the service life of 1,000 times for one device, a single portable DTU point-to-point device can save 300,000 yuan in its entire life cycle.

[0063] The above specific implementation is a preferred implementation of a method and device for rapid point-to-point connection of a DTU site under power on, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A method for fast point-to-point connection of DTU sites, characterized in that: The steps include: Bring the DTU site live fast point-to-point device to the distribution station, unplug the plug on the DTU terminal screen to be connected, and then plug in the DTU site live fast point-to-point device. The on-site personnel communicate with the main station manager and the main station backstage to check the dual naming of the site and the switch cabinet; On-site staff operate the DTU site live fast point-to-point device, perform telemetry by pressing buttons on the device, simulate the closing and opening of switches, and different position states of ground knife position operation, and generate analog electrical signals; The analog electrical signal is uploaded to the master station; the on-site personnel confirm through the communication connection that the master station has received the corresponding control information; Before remote control, the on-site personnel connect to the main station personnel through communication to check the switch status, determine the current switch position and obtain confirmation from the background; the background issues the pre-control command, and according to the control command, observes the corresponding changes of the indicator light and feeds back the change to the main station; After completing the work, reconnect the plug on the original DTU terminal screen.

2. A method for fast point-to-point connection of DTU sites powered on according to claim 1, characterized in that: After inserting the aviation plug of the DTU site live fast point-to-point device into the corresponding interval of the DTU on site, the specific steps of operating the DTU site live fast point-to-point device to simulate the closing of the switch are as follows: press the closing button, the relay is energized, and its normally open auxiliary contact is closed. The switch closing information is obtained through the communication connection background check. It means that the remote signal closing is successful; the specific steps of operating the DTU site energized fast point-to-point device to simulate the opening of the switch are: the two contacts are connected to the remote signal opening circuit through the aviation plug, the opening signal is sent to the background, and the switch opening information is obtained through the communication connection background verification; it means that the remote signal opening is successful.

3. A DTU site live fast point-to-point method according to claim 2 or 3, characterized in that: Manually turn the universal rotary switch to make the "distant" The "local" and "ground switch closing" contacts are closed respectively, and then connected to the remote signal input circuit through the aviation plug, and the corresponding status changes with the background master station are obtained through the communication connection background verification.

4. A method for fast point-to-point connection of DTU sites with power supply according to claim 1, characterized in that: Before remote control pointing, the DTU site's energized quick pointing device is adjusted to the state of waiting for the control-on command to be issued. After verifying through the communication connection background that the control-on command has been issued, observe and confirm that the indicator light changes from the open position to the closed position; after verifying through the communication connection background that the control-off command has been issued, observe and confirm that the indicator light changes from the closed position to the open position.

5. A DTU site live fast point-to-point method according to any one of claims 1-4, characterized in that: The communication connection between the on-site personnel and the main station backend includes telephone communication and preset verification process options on the operation panel.

6. A DTU site live fast point-to-point method according to any one of claims 1-4, characterized in that: Before unplugging the plug on the DTU terminal screen to be connected, check the operating status of the DTU device through the detection software provided by the DTU device, and confirm the connection is successful again after plugging in the aviation plug of the DTU site's powered fast connection device.

7. A DTU site live fast point-to-point device, used for a DTU site live fast point-to-point method as claimed in claim 1, characterized in that: It comprises a shell, on which an opening and closing indicator light is installed. The shell is provided with at least a power supply circuit function module, a remote signal circuit function module and a remote control circuit function module. All the function modules in the shell are connected to the main aviation plug. The portable aviation plug is used to connect with each interval in the DTU screen. The power supply circuit module supplies power to the whole device. The remote signal circuit module realizes the simulation transmission of the opening and closing positions of the load switch and the opening and closing positions of the earth switch through the opening and closing buttons and switches. The remote control circuit module connects a pair of opening and closing control contacts of the DTU in series into the circuit, and lights the opening and closing indicator light when the remote control opening and closing is successful.

8. A DTU site live fast point-to-point device as claimed in claim 7, characterized in that: The AC power supply part in the power circuit functional module has a live wire connected to one end of the switch through a terminal, and a neutral wire connected to the other end. The switch is used to control whether the AC power supply can be connected to the power module; the power module outputs DC 48V, and its positive and negative poles are respectively connected to the corresponding ends of another switch through terminals.

9. A DTU site live fast point-to-point device as claimed in claim 7, characterized in that: A plurality of terminals are arranged on one side of the remote signaling circuit function module, and the terminals are connected to relays to realize the functions of signal conversion and circuit on-off; the other side of the remote signaling circuit function module is connected to the DTU, and is provided with normally open auxiliary contacts for the open state, normally closed auxiliary contacts for the closed state, a switching switch for switching between local and remote control, and a remote signaling common point.

10. A DTU site live fast point-to-point device as claimed in claim 7, characterized in that: The remote control circuit function module is a dual-position self-holding remote control module, which is connected to the power supply circuit function module; the local closing and remote control closing modules are used to meet different operating requirements to realize the equipment closing action. The local closing is controlled by the closing button. After pressing it, the current passes through the relevant components to cause the contactor to close. The remote control closing is driven by an external control signal to drive a specific relay, which links other components to achieve closing; corresponding local opening and remote control opening modules are also provided. The local opening presses the opening button to disconnect the circuit of the contactor, and the remote control opening controls the corresponding relay through an external signal to realize opening; the circuit end is provided with a closing indication and an opening indication module for connecting the opening and closing indicator lights, and the current working status of the circuit is presented through the opening and closing indicator lights.

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