Modular transmission line de-icing system, de-icing method, electronic equipment and storage medium

Abstract

This invention discloses a modular transmission line de-icing system, comprising an de-icing device module, a parallel interface module, a combined disconnect switch module, and a control module. The de-icing device module connects to an external de-icing power supply to acquire de-icing energy and outputs a corresponding de-icing current. The parallel interface module connects the de-icing current output from the de-icing device module and outputs it to the combined disconnect switch module, while simultaneously sampling the de-icing current and uploading it to the control module. The combined disconnect switch module receives control signals from the control module and outputs the de-icing current to the transmission line to be de-iced, thereby achieving de-icing of the transmission line. The control module receives the sampling signals from the parallel interface module and controls the operation of the de-icing device module and the combined disconnect switch module. This invention also discloses a de-icing method for the modular transmission line de-icing system, as well as electronic equipment and a storage medium incorporating the de-icing method. This invention not only enables de-icing of transmission lines but also makes the de-icing system more reliable and safer.

Description

Technical Field

[0001] This invention belongs to the field of electrical automation, and specifically relates to a modular power transmission line de-icing system, de-icing method, electronic equipment, and storage medium. Background Technology

[0002] With economic and technological development and the improvement of people's living standards, electricity has become an indispensable secondary energy source in people's production and daily life, bringing endless convenience. Therefore, ensuring a stable and reliable supply of electricity has become one of the most important tasks of the power system.

[0003] Icing on transmission lines is one of the major natural disasters that seriously affects the safe operation of the power grid. DC de-icing technology is currently the most effective active de-icing method. It melts the ice by applying a DC voltage to the line and utilizing the heat generated by the resistance of the conductors. Based on the deployment method, it is mainly divided into fixed DC de-icing devices and mobile DC de-icing devices. Fixed devices have a large capacity but suffer from problems such as large footprint, high investment costs, and inflexible deployment. Mobile devices rely on vehicle-mounted platforms, offering advantages such as flexible deployment and rapid response, but the capacity of a single device is limited by the load-bearing capacity and space constraints of the vehicle platform.

[0004] As the backbone of the power grid, 500kV transmission lines are characterized by long lines, large conductor cross-sections, numerous conductors, and low resistance. The required de-icing current and voltage are high, often exceeding the capacity of a single mobile DC de-icing device. Therefore, fixed DC de-icing devices are generally used. However, on the one hand, some substations cannot construct large-scale fixed DC de-icing devices due to land constraints; on the other hand, some substations only have one or two lines requiring de-icing, making the expensive fixed DC de-icing devices uneconomical. Moreover, such temporary parallel operation schemes are not only complex to operate but also difficult to monitor during the de-icing process, resulting in poor safety and reliability. Summary of the Invention

[0005] One of the objectives of this invention is to provide a modular power transmission line de-icing system that is highly reliable and safe.

[0006] The second objective of this invention is to provide a de-icing method for the modular transmission line de-icing system.

[0007] A third objective of this invention is to provide an electronic device that incorporates the aforementioned ice-melting method.

[0008] The fourth objective of this invention is to provide a storage medium that includes the aforementioned modular power line de-icing system.

[0009] The modular power transmission line de-icing system provided by this invention includes: a de-icing device module for acquiring de-icing electrical energy and outputting a corresponding de-icing current;

[0010] The parallel interface module is used to connect the received de-icing current in parallel and output it to the combined disconnect switch module, while sampling the de-icing current and uploading it to the control module.

[0011] The control module is used to receive the sampling signals from the parallel interface module, control the start and stop of the ice melting device module, and control the operation of the combined knife switch module.

[0012] The combined disconnect switch module is used to receive control signals from the control module and output de-icing current to the transmission line to be de-iced, so as to achieve de-icing of the transmission line. The positive terminals of several DC de-icing power outputs from the de-icing device module are connected together, and the negative terminals of several DC de-icing power outputs from the de-icing device module are also connected together.

[0013] The parallel interface module includes:

[0014] The isolation protection terminal is used to connect the positive terminal to the positive input terminal of the combined knife switch module and the negative terminal to the negative input terminal of the combined knife switch module, while isolating and protecting the de-icing current output by the parallel interface module.

[0015] Several circuit transformers are used to collect the output current signal of each DC ice-melting power source and upload it to the parallel interface processing unit.

[0016] The parallel interface arithmetic unit is used to calculate the imbalance rate between several DC de-icing currents based on the received current signal, and upload the calculation results to the control module.

[0017] The combined disconnect switch module includes an A-phase positive disconnect switch, an A-phase negative disconnect switch, a B-phase positive disconnect switch, a B-phase negative disconnect switch, a C-phase positive disconnect switch, and a C-phase negative disconnect switch. The A-phase positive disconnect switch is connected in series between the positive input terminal and the A-phase output terminal of the combined disconnect switch module; the A-phase negative disconnect switch is connected in series between the negative input terminal and the A-phase output terminal of the combined disconnect switch module; the B-phase positive disconnect switch is connected in series between the positive input terminal and the B-phase output terminal of the combined disconnect switch module; the B-phase negative disconnect switch is connected in series between the negative input terminal and the B-phase output terminal of the combined disconnect switch module; the C-phase positive disconnect switch... The positive input terminal of the combined disconnect switch module and the C-phase output terminal are connected in series; the negative input terminal of the C-phase disconnect switch module and the C-phase output terminal are connected in series; the A-phase output terminal is used to connect to the A-phase line of the transmission line to be melted; the B-phase output terminal is used to connect to the B-phase line of the transmission line to be melted; the C-phase output terminal is used to connect to the C-phase line of the transmission line to be melted; the positive A-phase disconnect switch, the negative A-phase disconnect switch, the positive B-phase disconnect switch, the negative B-phase disconnect switch, the positive C-phase disconnect switch, and the negative C-phase disconnect switch are used to receive the drive signal output by the control module and to open or close the circuit.

[0018] The control module includes a controller and an alarm. The controller receives imbalance rate data between several DC de-icing currents uploaded by the parallel interface module and controls the corresponding mobile DC de-icing device in the de-icing device module to operate based on the imbalance rate data. The controller also outputs control signals and controls the knife switch in the combined knife switch module to operate. The controller also controls the alarm to sound an alarm.

[0019] A de-icing method for a modular transmission line de-icing system includes the following steps:

[0020] Obtain parameter information for the line to be melted;

[0021] Based on the acquired data, the ice-melting current and voltage ranges were determined according to the ice-melting technology guidelines, and the number of mobile DC ice-melting devices and the ice-melting mode of the lines to be melted were also determined.

[0022] The modular power line de-icing system is transported to the substation corresponding to the line to be de-iced.

[0023] The de-icing modification is carried out on the line to be de-iced, and the modular power line de-icing system is connected to the de-icing power supply and the line to be de-iced.

[0024] The modular power transmission line de-icing system is in operation, de-icing the lines that need to be de-iced.

[0025] After the de-icing is completed, disconnect the de-icing power supply, restore the circuit to be de-iced, and complete the de-icing operation.

[0026] The acquisition of parameter information for the line to be melted includes conductor parameters, environmental conditions, and target melting time.

[0027] The present invention also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the ice-melting method.

[0028] The present invention also provides a storage medium storing a computer program, which, when executed by a processor, implements the ice-melting method.

[0029] The modular transmission line de-icing system, de-icing method, electronic equipment, and storage medium provided by this invention, through the construction and assembly of the modular transmission line de-icing system, not only can de-icing of transmission lines be achieved, but the de-icing system is also more reliable and safer. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the functional modules of the system of the present invention.

[0031] Figure 2 This is a schematic diagram of an embodiment of the system of the present invention.

[0032] Figure 3 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0033] like Figure 1 The diagram shown is a functional module diagram of the system of the present invention: This invention discloses a modular power transmission line de-icing system.

[0034] Includes: an ice-melting device module, used to acquire ice-melting electrical energy and output the corresponding ice-melting current;

[0035] The parallel interface module is used to connect the received de-icing current in parallel and output it to the combined disconnect switch module, while sampling the de-icing current and uploading it to the control module.

[0036] The control module is used to receive the sampling signals from the parallel interface module, control the start and stop of the ice melting device module, and control the operation of the combined knife switch module.

[0037] The combined disconnector module is used to receive control signals from the control module and output de-icing current to the transmission line to be de-iced, so as to realize the de-icing of the transmission line.

[0038] In specific implementation, the ice-melting device module includes several mobile DC ice-melting devices.

[0039] In practice, the positive terminals of several DC de-icing power outputs from the de-icing device module are connected together, and the negative terminals of several DC de-icing power outputs from the de-icing device module are also connected together.

[0040] The parallel interface module includes:

[0041] The isolation protection terminal is used to connect the positive terminal to the positive input terminal of the combined knife switch module and the negative terminal to the negative input terminal of the combined knife switch module, while isolating and protecting the de-icing current output by the parallel interface module.

[0042] Several circuit transformers are used to collect the output current signal of each DC ice-melting power source and upload it to the parallel interface processing unit.

[0043] The parallel interface arithmetic unit is used to calculate the imbalance rate (imbalance rate = (maximum current - minimum current) / average current) between several DC de-icing currents based on the received current signal, and upload the calculation results to the control module.

[0044] In specific implementation, the combined disconnect switch module includes an A-phase positive disconnect switch, an A-phase negative disconnect switch, a B-phase positive disconnect switch, a B-phase negative disconnect switch, a C-phase positive disconnect switch, and a C-phase negative disconnect switch. The A-phase positive disconnect switch is connected in series between the positive input terminal and the A-phase output terminal of the combined disconnect switch module; the A-phase negative disconnect switch is connected in series between the negative input terminal and the A-phase output terminal of the combined disconnect switch module; the B-phase positive disconnect switch is connected in series between the positive input terminal and the B-phase output terminal of the combined disconnect switch module; the B-phase negative disconnect switch is connected in series between the negative input terminal and the B-phase output terminal of the combined disconnect switch module; the C-phase positive disconnect switch... The disconnect switch is connected in series between the positive input terminal and the C-phase output terminal of the combined disconnect switch module; the C-phase negative disconnect switch is connected in series between the negative input terminal and the C-phase output terminal of the combined disconnect switch module; the A-phase output terminal is used to connect to the A-phase line of the transmission line to be melted; the B-phase output terminal is used to connect to the B-phase line of the transmission line to be melted; the C-phase output terminal is used to connect to the C-phase line of the transmission line to be melted; the A-phase positive disconnect switch, A-phase negative disconnect switch, B-phase positive disconnect switch, B-phase negative disconnect switch, C-phase positive disconnect switch, and C-phase negative disconnect switch are used to receive the drive signal output by the control module and to open or close the circuit.

[0045] In practice, a controlled switch can be selected as the knife switch.

[0046] In practical implementation, the control module includes a controller and an alarm. The controller receives imbalance rate data between several DC de-icing currents uploaded by the parallel interface module and controls the corresponding mobile DC de-icing device in the de-icing device module to operate based on the imbalance rate data. Specifically, if the imbalance rate exceeds a set value, the power supply to the de-icing device is disconnected. The controller also controls the specific operating status of the mobile DC de-icing device (including whether it is operating or not). The controller also outputs control signals and controls the knife switch in the combined knife switch module. Furthermore, the controller controls the alarm to sound. In addition, the control module includes a display module (such as an industrial touchscreen), which is connected to the controller. Operators can obtain data information about the de-icing process and control the system through the display module.

[0047] This invention enables "plug-and-play" parallel operation of multiple mobile ice-melting devices. Users can flexibly increase or decrease the number of parallel devices according to the ice-melting needs of different lines, quickly constructing an ice-melting system of the required capacity like building blocks, greatly improving resource utilization efficiency and emergency response capabilities. This invention also enables centralized monitoring, unified scheduling, and collaborative management of multiple parallel mobile ice-melting devices, fundamentally simplifying system control logic and reducing the complexity and safety risks of parallel operation. Furthermore, this invention allows for automatic ice melting through a controller, resulting in higher reliability, safety, and efficiency.

[0048] like Figure 3 The diagram shown is a flowchart of the method of the present invention: The de-icing method of the modular transmission line de-icing system disclosed in this invention includes the following steps:

[0049] Obtain parameter information for the line to be melted; specifically, this includes conductor parameters, environmental conditions, and target melting time.

[0050] Based on the acquired data, the ice-melting current and voltage ranges were determined according to the ice-melting technology guidelines, and the number of mobile DC ice-melting devices and the ice-melting mode of the lines to be melted were also determined.

[0051] The modular power line de-icing system is transported to the substation corresponding to the line to be de-iced.

[0052] The de-icing modification is carried out on the line to be de-iced, and the modular power line de-icing system is connected to the de-icing power supply and the line to be de-iced.

[0053] The modular power transmission line de-icing system is in operation, de-icing the lines that need to be de-iced.

[0054] After the de-icing is completed, disconnect the de-icing power supply, restore the circuit to be de-iced, and complete the de-icing operation.

[0055] The present invention will be further described below with reference to an embodiment:

[0056] Taking the de-icing task of a line prone to icing in a 500kV substation as an example; the conductor type of this line is 4×JL3 / G1A-630 / 45, and the length is... Single-phase resistor .

[0057] According to the "Technical Guidelines for Ice Melting of Transmission Lines" and related calculations, the ice melting method of this line is determined to be "two-phase series". The required ice melting current range is 4400A~7200A, and the corresponding required DC voltage range is 3161V~6898V.

[0058] The existing mobile DC ice-melting device, model ZYDRB-E-18MW / 10kV, has a maximum output current in parallel output mode. Maximum output voltage A single unit cannot meet the minimum current requirement of 4400A.

[0059] Using the topology of this invention, two identical devices are selected for parallel operation. Based on the parallel characteristics, the theoretical maximum output current of the system is... (Minimum required current), maximum output voltage (Minimum required voltage). Therefore, it was decided to adopt the "dual-machine parallel" mode.

[0060] Two mobile DC ice-melting devices (referred to as device #1 and device #2) were transported to the vicinity of the reserved ice-melting power supply access point within the substation. The input sides of devices #1 and #2 were connected to the 10kV ice-melting power supply switchgear within the substation. Cables were used to connect the "positive output terminal" of device #1 and the parallel interface module to the corresponding "positive input terminal" of device #2, as well as their "negative output terminals." At this point, the two devices were electrically connected in parallel on the DC side. The isolation protection terminal of the parallel interface module was connected to the input terminal of the combined disconnect switch module. The system connection was then as follows. Figure 3 As shown.

[0061] On-site personnel confirmed that the end of the line to be melted was reliably short-circuited before starting the melting process. After the melting was completed, the power supply to the line was disconnected, and the melting operation was restored, thus completing the melting process.

[0062] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0063] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0064] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0065] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0066] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A modular power transmission line de-icing system, characterized in that, include: The ice-melting device module is used to acquire ice-melting electrical energy and output the corresponding ice-melting current; The parallel interface module is used to connect the received de-icing current in parallel and output it to the combined disconnect switch module, while sampling the de-icing current and uploading it to the control module. The control module is used to receive the sampling signals from the parallel interface module, control the start and stop of the ice melting device module, and control the operation of the combined knife switch module. The combined disconnector module is used to receive control signals from the control module and output de-icing current to the transmission line to be de-iced, so as to realize the de-icing of the transmission line.

2. The modular transmission line de-icing system according to claim 1, characterized in that, Connect the positive terminals of several DC de-icing power outputs from the de-icing device module together, and simultaneously connect the negative terminals of several DC de-icing power outputs from the de-icing device module together. The parallel interface module includes: The isolation protection terminal is used to connect the positive terminal to the positive input terminal of the combined knife switch module and the negative terminal to the negative input terminal of the combined knife switch module, while isolating and protecting the de-icing current output by the parallel interface module. Several circuit transformers are used to collect the output current signal of each DC ice-melting power source and upload it to the parallel interface processing unit. The parallel interface arithmetic unit is used to calculate the imbalance rate between several DC de-icing currents based on the received current signal, and upload the calculation results to the control module.

3. The modular transmission line de-icing system according to claim 2, characterized in that... The combined disconnect switch module includes an A-phase positive disconnect switch, an A-phase negative disconnect switch, a B-phase positive disconnect switch, a B-phase negative disconnect switch, a C-phase positive disconnect switch, and a C-phase negative disconnect switch. The A-phase positive disconnect switch is connected in series between the positive input terminal and the A-phase output terminal of the combined disconnect switch module; the A-phase negative disconnect switch is connected in series between the negative input terminal and the A-phase output terminal of the combined disconnect switch module; the B-phase positive disconnect switch is connected in series between the positive input terminal and the B-phase output terminal of the combined disconnect switch module; the B-phase negative disconnect switch is connected in series between the negative input terminal and the B-phase output terminal of the combined disconnect switch module; the C-phase positive disconnect switch... The positive input terminal of the combined disconnect switch module and the C-phase output terminal are connected in series; the negative input terminal of the C-phase disconnect switch module and the C-phase output terminal are connected in series; the A-phase output terminal is used to connect to the A-phase line of the transmission line to be melted; the B-phase output terminal is used to connect to the B-phase line of the transmission line to be melted; the C-phase output terminal is used to connect to the C-phase line of the transmission line to be melted; the positive A-phase disconnect switch, the negative A-phase disconnect switch, the positive B-phase disconnect switch, the negative B-phase disconnect switch, the positive C-phase disconnect switch, and the negative C-phase disconnect switch are used to receive the drive signal output by the control module and to open or close the circuit.

4. The modular transmission line de-icing system according to claim 3, characterized in that... The control module includes a controller and an alarm. The controller receives imbalance rate data between several DC de-icing currents uploaded by the parallel interface module and controls the corresponding mobile DC de-icing device in the de-icing device module to operate based on the imbalance rate data. The controller also outputs control signals and controls the knife switch in the combined knife switch module to operate. The controller also controls the alarm to sound an alarm.

5. A de-icing method for a modular transmission line de-icing system, comprising the following steps: Obtain parameter information for the line to be melted; Based on the acquired data, the ice-melting current and voltage ranges were determined according to the ice-melting technology guidelines, and the number of mobile DC ice-melting devices and the ice-melting mode of the lines to be melted were also determined. The modular power line de-icing system is transported to the substation corresponding to the line to be de-iced. The de-icing modification is carried out on the line to be de-iced, and the modular power line de-icing system is connected to the de-icing power supply and the line to be de-iced. The modular power transmission line de-icing system is in operation, de-icing the lines that need to be de-iced. After the de-icing is completed, disconnect the de-icing power supply, restore the circuit to be de-iced, and complete the de-icing operation.

6. The ice-melting method according to claim 5, characterized in that, The acquisition of parameter information for the line to be melted includes conductor parameters, environmental conditions, and target melting time.

7. An electronic device comprising a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the ice-melting method of claim 5 or 6.

8. A storage medium storing a computer program that, when executed by a processor, implements the ice-melting method of claim 5 or 6.

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