A ring main unit displacement electrical linkage protection control method

Abstract

The application relates to the general power distribution equipment technical field, in particular to a ring network box displacement electrical linkage protection control method and device, the method comprises the following steps: when the ring network box is installed, the fixed position data of a monitoring device fixed on the ground and the initial position data of a plurality of fixing devices fixed on the bottom surface of the ring network box are acquired; at a target monitoring moment, the change data of the relative position between the monitoring device and the fixing device is acquired; according to the fixed position data, the initial position data and the change data, the target position data of the fixing device at the target monitoring moment is determined, and according to the target position data and the initial position data, the displacement data of the ring network box at the target monitoring moment is determined; if the displacement data exceeds a displacement threshold value, a protection signal is sent to a control unit, so that the control unit starts an electrical linkage protection device in the ring network box, and the ring network box realizes circuit cutting.

Description

Technical Field

[0001] This application relates to the field of power distribution equipment technology, and in particular to a method for electrical linkage protection and control of ring main unit displacement. Background Technology

[0002] A ring main unit (RMU) is an outdoor complete set of equipment used for ring network power supply in a power distribution system. It typically consists of multiple RMU units integrated into a metal enclosure and has functions of power distribution, protection, and control. Unlike indoor RMU units, RMUs are designed specifically for outdoor environments and are widely used in urban power grids, residential communities, and industrial power supply scenarios.

[0003] During the installation of ring main units, installation problems such as insecure foundation fixation, inadequate leveling, and failure of the supporting structure are prone to occur. These installation problems can cause the ring main unit to shift relative to the concrete foundation below. For this type of ring main unit displacement, a low-cost, simple manual measurement method is typically used. However, this method has low accuracy, and minute displacements often go undetected. Therefore, a superior electrical linkage protection and control scheme for ring main unit displacement is needed to overcome these difficulties. Summary of the Invention

[0004] In view of this, this application provides a ring main unit displacement electrical linkage protection and control scheme to solve the above problems.

[0005] In a first aspect, this application provides a method for electrical linkage protection and control of ring main unit displacement, including: When the ring network box is installed, the fixed position data of the monitoring device fixed on the ground and the initial position data of the multiple fixed devices fixed on the bottom surface of the ring network box are obtained. The monitoring device is fixed below the bottom surface of the ring network box. At the target monitoring time, data on the change in the relative position between the monitoring device and the fixed device are acquired. The relative position includes distance change data and angle change data. The relative position changes with the displacement of the ring network box. Based on the fixed position data, the initial position data, and the change data, the target position data of the fixed device at the target monitoring time is determined, and based on the target position data and the initial position data, the displacement data of the ring network box at the target monitoring time is determined; If the displacement data exceeds the displacement threshold, a protection signal is sent to the control unit so that the control unit can activate the electrical linkage protection device in the ring network box, thereby disconnecting the circuit of the ring network box.

[0006] Furthermore, the fixing device includes a first fixing device, a second fixing device, and a third fixing device with different lines. Determining the displacement data of the ring network box at the target monitoring time based on the target position data and the initial position data includes: Based on the initial position data of the first fixing device, the second fixing device, and the third fixing device, determine the position data of the ring network box when it is installed. Based on the target position data of the first fixing device, the second fixing device, and the third fixing device, the position data of the ring network box at the target monitoring time is determined; Based on the position data of the ring network box when it is installed and the position data at the target monitoring time, the displacement data of the ring network box at the target monitoring time is determined.

[0007] Furthermore, when the monitoring device includes a wire displacement sensor and a rotation angle encoder, acquiring the change data of the relative position between the monitoring device and the fixed device at the target monitoring time includes: At the target monitoring time, distance change data of the relative position is acquired from the pull-wire sensor, the pull-wire sensor is fixed to the monitoring device, and the pull-wire in the pull-wire sensor is connected to the fixing device; The relative position angle change data is obtained from the rotary angle encoder, which is used to monitor the angle change of the pull wire in the pull wire sensor.

[0008] Furthermore, the tension of the pull wire in the pull wire sensor is less than a preset tension threshold.

[0009] Furthermore, when the monitoring device includes a laser rangefinder and an inertial measurement module, acquiring the change data of the relative position between the monitoring device and the fixed device at the target monitoring time includes: At the target monitoring time, distance change data of the relative position is acquired from the laser ranging sensor. The laser ranging sensor is fixed to the monitoring device and is used to monitor the distance between the monitoring device and the fixed device. The inertial measurement module acquires the angular change data of the relative position. The inertial measurement module is used to monitor the angular change of the line connecting the monitoring device and the fixed device.

[0010] Furthermore, the displacement threshold includes a lateral displacement threshold, a longitudinal displacement threshold, and a rotational displacement threshold. When the displacement data exceeds the displacement threshold, a protection signal is sent to the control unit to activate the electrical linkage protection device in the ring main unit, thereby disconnecting the circuit of the ring main unit. This includes: The displacement data is decomposed to determine the lateral displacement, longitudinal displacement, and rotational displacement of the ring network box at the target monitoring time. If the lateral displacement of the ring network box is greater than the lateral displacement threshold, the longitudinal displacement is greater than the longitudinal displacement threshold, or the rotational displacement is greater than the rotational displacement threshold at the target monitoring time, a protection signal is sent to the control unit so that the control unit activates the electrical linkage protection device in the ring network box, thereby disconnecting the circuit of the ring network box.

[0011] Furthermore, the ring main unit displacement electrical linkage protection and control method further includes: When the ring network box and the supplementary ring network box are combined into a joint ring network box, the monitoring device of the ring network box is used as the monitoring device of the joint ring network box, and the monitoring device in the joint ring network box is used to monitor the fixed devices in the joint ring network box; From the fixing devices of the ring network box and the supplementary ring network box, select the fixing device of the combined ring network box, wherein at least one fixing device of the combined ring network box comes from the ring network box and at least one fixing device comes from the supplementary ring network box, and the fixing devices in the combined ring network box are not collinear; The displacement electrical linkage protection control of the combined ring network box is realized through the fixing device and monitoring device in the combined ring network box.

[0012] Secondly, this application provides a ring main unit displacement electrical linkage protection and control device, comprising: The data module is used to acquire the fixed position data of the monitoring device fixed on the ground and the initial position data of multiple fixed devices fixed on the bottom surface of the ring network box when the ring network box is installed. The monitoring device is fixed below the bottom surface of the ring network box. The change module is used to acquire the change data of the relative position between the monitoring device and the fixed device at the target monitoring time. The relative position includes distance change data and angle change data. The relative position changes with the displacement of the ring network box. The displacement module is used to determine the target position data of the fixed device at the target monitoring time based on the fixed position data, the initial position data, and the change data, and to determine the displacement data of the ring network box at the target monitoring time based on the target position data and the initial position data. The protection module is used to send a protection signal to the control unit when the displacement data exceeds the displacement threshold, so that the control unit can activate the electrical linkage protection device in the ring network box and disconnect the circuit of the ring network box.

[0013] Thirdly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above-described method.

[0014] Fourthly, this application provides a non-volatile computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0015] Fifthly, this application provides a computer program product, including a computer program or a non-volatile computer-readable storage medium carrying the computer program, wherein the computer program, when executed by a processor, implements the steps of the above-described method.

[0016] In the embodiments of this specification, the target data of the fixed device at the target inspection time is determined based on the change data of the relative position between the monitoring device and the fixed device. Then, based on the target position data, the displacement data of the ring main unit is determined. Thus, a protection signal can be sent based on the displacement data. This process determines the displacement data of the ring main unit by monitoring the change data of the relative position between the monitoring device and the fixed device. Since the relative position is easy to measure and multiple relative positions can be cross-checked and error compensated, the accuracy of the ring main unit displacement data can be improved, thereby enhancing the robustness of the ring main unit displacement electrical linkage protection control method. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] Figure 1 The diagram above illustrates a flow chart of a method for electrical linkage protection and control of displacement of a ring main unit.

[0019] Figure 2 The diagram above illustrates a structural schematic of a ring main unit displacement electrical linkage protection and control device.

[0020] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0021] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0022] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0023] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0024] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0025] Figure 1 A flowchart illustrating a ring main unit displacement electrical linkage protection control method according to an embodiment of this disclosure is provided. This method can be applied to a ring main unit displacement electrical linkage protection control device, which can be a terminal device, a server, or other processing equipment. The terminal device can be a user equipment (UE), mobile device, user terminal, terminal, cellular phone, cordless phone, personal digital assistant (PDA), handheld device, computing device, vehicle-mounted device, wearable device, etc.

[0026] In some possible implementations, the electrical linkage protection and control method for the displacement of the ring main unit can be implemented by a processor calling computer-readable instructions stored in memory.

[0027] like Figure 1 As shown, the ring main unit displacement electrical linkage protection and control method may include: In step S11, when the ring network box is installed, the fixed position data of the monitoring device fixed on the ground and the initial position data of the multiple fixed devices fixed on the bottom surface of the ring network box are obtained.

[0028] In step S12, at the target monitoring time, the change data of the relative position between the monitoring device and the fixed device is acquired.

[0029] The monitoring device is fixed below the bottom surface of the ring main unit and can be used to monitor changes in the relative position between the fixed device and the monitoring device. When the ring main unit is installed on a concrete foundation using support members, the monitoring device can be installed on the concrete foundation below the ring main unit, with space between the bottom surface of the ring main unit and the concrete foundation for installing the monitoring device. Installing the monitoring device below the bottom surface of the ring main unit helps to avoid damage to the monitoring device from external environmental factors (such as rain and snow) and improves the accuracy of the subsequently determined displacement of the ring main unit.

[0030] The fixed position data can be the Earth coordinates of the monitoring device when the ring network box is installed, and the initial position data can be the Earth coordinates of the fixed device when the ring network box is installed. After obtaining the fixed position data, the initial position data of the fixed device can be determined based on the relative position data between the ring network box and the monitoring device, and the relative position data of the fixed device on the ring network box.

[0031] The fixing device is a device that is fixed in position on the bottom surface of the ring network box. The data on the change in the relative position between the monitoring device and the fixing device can include distance change data, angle change data (i.e., the angle change data of the line connecting the monitoring device and the fixing device), etc. Clearly, the relative position changes with the displacement of the ring network box. This change data can be obtained using at least two measurement methods: a combination of a laser module and an inertial measurement unit (IMU), or a combination of a wire displacement sensor and a rotary angle encoder.

[0032] The monitoring device may include sensors, a processing unit, etc. The sensors can acquire data, and the processing unit can perform data calculations. The shape and structure of the fixing device, the type of sensor, and the data processing method of the processing unit can be set according to the selected measurement method. The specific construction of the monitoring device and the fixing device can be referred to in subsequent embodiments, and will not be elaborated here.

[0033] In step S13, the target position data of the fixed device at the target monitoring time is determined based on the fixed position data, the initial position data, and the change data, and the displacement data of the ring network box at the target monitoring time is determined based on the target position data and the initial position data.

[0034] The target monitoring time can be any moment after the ring network box is installed. For each fixed device, the target position data of that device at the target monitoring time can be obtained based on the fixed position data, initial position data, and change data. Then, the target position data of each fixed device can be integrated to determine the displacement data of the ring network box from the completion of installation to the target monitoring time.

[0035] Specifically, the number of fixed devices can be set to three, and the three fixed devices are not on the same line (i.e., not on the same straight line). Correspondingly, three sets of equipment can also be set in the monitoring device to monitor the relative position between each fixed device and the monitoring device. In one possible implementation, the fixed devices include a first fixed device, a second fixed device, and a third fixed device on different lines. Determining the displacement data of the ring network box at the target monitoring time based on the target position data and the initial position data includes: Based on the initial position data of the first fixing device, the second fixing device, and the third fixing device, determine the position data of the ring network box when it is installed. Based on the target position data of the first fixing device, the second fixing device, and the third fixing device, the position data of the ring network box at the target monitoring time is determined; Based on the position data of the ring network box when it is installed and the position data at the target monitoring time, the displacement data of the ring network box at the target monitoring time is determined.

[0036] The ring main unit can be positioned using the first, second, and third fixing devices on different lines. Specifically, the initial position data of the three fixing devices can be combined with their relative positions within the ring main unit to determine the position data of the ring main unit after installation; the target position data of the three fixing devices can be combined with their relative positions within the ring main unit to determine the position data of the ring main unit at the target monitoring time.

[0037] Furthermore, the displacement data of the ring network box at the target monitoring time can be determined based on the position data of the ring network box when it is installed and the position data of the ring network box at the target monitoring time.

[0038] The above process uses three non-collinear fixing devices to determine the displacement data of the ring main unit. This process achieves the positioning of the ring main unit with a minimum number of fixing devices, reducing the cost of electrical linkage protection control for ring main unit displacement.

[0039] In step S14, if the displacement data exceeds the displacement threshold, a protection signal is sent to the control unit so that the control unit activates the electrical linkage protection device in the ring network box, thereby cutting off the circuit of the ring network box.

[0040] Specifically, a displacement threshold can be set for the displacement data, and protective measures can be taken when the displacement data exceeds the displacement threshold. The displacement of the ring network box can be simply divided into longitudinal displacement (linear translation along the front-to-back direction of the ring network box body), lateral displacement (linear translation along the left-to-right direction of the ring network box body), and rotational displacement (the box body deflects or twists around the central vertical axis in the horizontal plane, and the overall angle of the box body deviates).

[0041] Based on the above analysis, after obtaining the displacement data, the displacement data of the ring main unit can be decomposed. In one possible implementation, the displacement threshold includes a lateral displacement threshold, a longitudinal displacement threshold, and a rotational displacement threshold. When the displacement data exceeds the displacement threshold, a protection signal is sent to the control unit to activate the electrical linkage protection device in the ring main unit, thereby disconnecting the circuit of the ring main unit. This includes: The displacement data is decomposed to determine the lateral displacement, longitudinal displacement, and rotational displacement of the ring network box at the target monitoring time. If the lateral displacement of the ring network box is greater than the lateral displacement threshold, the longitudinal displacement is greater than the longitudinal displacement threshold, or the rotational displacement is greater than the rotational displacement threshold at the target monitoring time, a protection signal is sent to the control unit so that the control unit activates the electrical linkage protection device in the ring network box, thereby disconnecting the circuit of the ring network box.

[0042] Specifically, after decomposing the displacement data, the various displacement data (lateral displacement, longitudinal displacement, and rotational displacement) can be compared with the corresponding displacement thresholds (lateral displacement threshold, longitudinal displacement threshold, and rotational displacement threshold). To improve the safety of the ring network box, protective measures can be taken when one of the displacement data exceeds its corresponding displacement threshold.

[0043] It should be understood that because different types of displacement cause different hazards, the displacement thresholds corresponding to different types of displacement data also differ. In one example, the minimum displacement threshold (e.g., 0.8°) can be set for the most hazardous rotational displacement. The lateral and longitudinal displacement thresholds can be set to 10 mm.

[0044] The electrical linkage protection device is a device installed in the ring main unit (RMU) to disconnect the circuit within the RMU. It is controlled by the control unit within the RMU. In one example, when the displacement data exceeds a displacement threshold, a protection signal to disconnect the RMU circuit is sent to the control unit. This allows the RMU to achieve automatic safety protection through the control unit and the electrical linkage protection device, thus completing the electrical linkage protection control of the RMU. This electrical linkage protection device may include protective control logic such as operation interlocking, fault tripping, load isolation, and power transfer interlocking to prevent power distribution faults and improve the operational safety and power supply reliability of the RMU.

[0045] In scenarios where existing ring main units (RMUs) are insufficient in capacity or require improved reliability, it is necessary to supplement existing RMUs and perform operations such as merging existing RMUs into multiple units. In one possible implementation, the RMU displacement electrical linkage protection and control method further includes: When the ring network box and the supplementary ring network box are combined into a joint ring network box, the monitoring device of the ring network box is used as the monitoring device of the joint ring network box, and the monitoring device in the joint ring network box is used to monitor the fixed devices in the joint ring network box; From the fixing devices of the ring network box and the supplementary ring network box, select the fixing device of the combined ring network box, wherein at least one fixing device of the combined ring network box comes from the ring network box and at least one fixing device comes from the supplementary ring network box, and the fixing devices in the combined ring network box are not collinear; The displacement electrical linkage protection control of the combined ring network box is realized through the fixing device and monitoring device in the combined ring network box.

[0046] When the relative displacement difference between adjacent ring main units exceeds the standard, it may cause stress damage to the busbars and secondary lines of the hard connection between the ring main units. Therefore, in addition to the displacement electrical linkage protection control of individual ring main units (including existing ring main units and newly added supplementary ring main units), it is also necessary to carry out displacement electrical linkage protection control of the entire joint ring main unit formed by multiple ring main units.

[0047] Specifically, the determination of displacement data for a combined ring main unit (specifically, a combined ring main unit comprising two ring main units in this specification) should utilize existing ring main unit devices and data as much as possible. As mentioned earlier, determining the displacement data of a single ring main unit requires at least one monitoring device and three fixing devices. Therefore, the monitoring device for the combined ring main unit can be the same as the existing ring main unit, and the fixing devices for the combined ring main unit can be fixing devices from different ring main units, and the fixing devices for the combined ring main unit should not be collinear.

[0048] It should be understood that for fixed devices that are different from the ring network box to which the monitoring device belongs, an additional device (such as a combination of a wire displacement sensor and a rotary angle encoder, or a combination of a laser rangefinder and a rotary angle encoder) needs to be added to the monitoring device to monitor the fixed devices that are different from the ring network box to which the monitoring device belongs.

[0049] Thus, after determining the monitoring and fixing devices for the combined ring main unit, the same electrical linkage protection and control method for ring main unit displacement as for a single ring main unit can be used to achieve electrical linkage protection and control of the combined ring main unit displacement. For details, please refer to the aforementioned electrical linkage protection and control method for ring main unit displacement, which will not be elaborated upon here.

[0050] In the embodiments of this specification, the target data of the fixed device at the target inspection time is determined based on the change data of the relative position between the monitoring device and the fixed device. Then, based on the target position data, the displacement data of the ring main unit is determined. Thus, a protection signal can be sent based on the displacement data. This process determines the displacement data of the ring main unit by monitoring the change data of the relative position between the monitoring device and the fixed device. Since the relative position is easy to measure and multiple relative positions can be cross-checked and error compensated, the accuracy of the ring main unit displacement data can be improved, thereby enhancing the robustness of the ring main unit displacement electrical linkage protection control method.

[0051] As mentioned above, the acquisition of change data can employ at least two measurement methods. In one possible implementation, when the monitoring device includes a wire displacement sensor and a rotary angle encoder, acquiring the change data of the relative position between the monitoring device and the fixed device at the target monitoring time includes: At the target monitoring time, distance change data of the relative position is acquired from the pull-wire sensor, the pull-wire sensor is fixed to the monitoring device, and the pull-wire in the pull-wire sensor is connected to the fixing device; The relative position angle change data is obtained from the rotary angle encoder, which is used to monitor the angle change of the pull wire in the pull wire sensor.

[0052] Specifically, a pull-wire sensor can be used to measure the distance changes between the monitoring device and each fixed device. The fixed device can be a structure (such as a screw or clip) that secures the end of the pull wire in the pull-wire sensor. The angular change data of the relative position can be obtained by measuring the angular change of the pull wire in the fixed pull-wire sensor using a rotary angle encoder.

[0053] To reduce the error of this method, the tension of the pull wire in the fixed pull wire sensor can be limited to be less than a preset tension threshold (e.g., 1-2 kgf). During use, the pull wire in this fixed pull wire sensor must remain naturally straight, without sagging or tautness.

[0054] In the above process, the relative position change data is determined by using a pull-wire sensor and a rotary angle encoder, providing a low-cost, vibration-resistant electrical linkage protection and control method for the displacement of a ring main unit.

[0055] In another possible implementation, where the monitoring device includes a laser rangefinder and an inertial measurement module, acquiring the change data of the relative position between the monitoring device and the fixed device at the target monitoring time includes: At the target monitoring time, distance change data of the relative position is acquired from the laser ranging sensor. The laser ranging sensor is fixed to the monitoring device and is used to monitor the distance between the monitoring device and the fixed device. The inertial measurement module acquires the angular change data of the relative position. The inertial measurement module is used to monitor the angular change of the line connecting the monitoring device and the fixed device.

[0056] Specifically, a laser rangefinder can be used to measure the distance changes between the monitoring device and each fixed device, which can be a reflector. The angular changes in relative position can be obtained by measuring the angular changes of the line connecting the monitoring device and the fixed devices (i.e., the rotation angle of the fixed devices) using an inertial measurement module.

[0057] In the above process, a laser rangefinder and an inertial measurement module are used to determine the relative position change data, providing a high-precision electrical linkage protection and control method for the displacement of a ring network box without mechanical tension.

[0058] The present invention also provides a ring main unit displacement electrical linkage protection and control device. Figure 2 This diagram illustrates a block diagram of a ring main unit displacement electrical linkage protection and control device according to an embodiment of this specification. The ring main unit displacement electrical linkage protection and control device can be a terminal device, a server, or other processing equipment. The terminal device can be a user equipment (UE), mobile device, user terminal, terminal, cellular phone, cordless phone, personal digital assistant (PDA), handheld device, computing device, vehicle-mounted device, wearable device, etc.

[0059] In some possible implementations, the ring main unit displacement electrical linkage protection and control device can be implemented by a processor calling computer-readable instructions stored in memory.

[0060] like Figure 2 As shown, the ring main unit displacement electrical linkage protection and control device 20 may include: Data module 21 is used to acquire, when the ring network box is installed, the fixed position data of the monitoring device fixed on the ground and the initial position data of multiple fixed devices fixed on the bottom surface of the ring network box, wherein the monitoring device is fixed below the bottom surface of the ring network box; The change module 22 is used to acquire the change data of the relative position between the monitoring device and the fixed device at the target monitoring time. The relative position includes distance change data and angle change data. The relative position changes with the displacement of the ring network box. The displacement module 23 is used to determine the target position data of the fixed device at the target monitoring time based on the fixed position data, the initial position data and the change data, and to determine the displacement data of the ring network box at the target monitoring time based on the target position data and the initial position data. Protection module 24 is used to send a protection signal to the control unit when the displacement data exceeds the displacement threshold, so that the control unit can activate the electrical linkage protection device in the ring network box and disconnect the circuit of the ring network box.

[0061] Thirdly, embodiments of this application also provide a ring main unit displacement electrical linkage protection and control system, the system including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of any of the methods described above.

[0062] Fourthly, embodiments of this application also provide a computer-readable storage medium storing computer program instructions thereon, which, when executed by a processor, implement the above-described method. The computer-readable storage medium may be volatile or non-volatile.

[0063] Fifthly, embodiments of this application also provide an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the above-described method when executing instructions stored in the memory.

[0064] Sixthly, this application provides a computer program product including computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code, wherein when the computer-readable code is run in a processor of an electronic device, the processor in the electronic device performs the above-described method.

[0065] This invention is now complete.

[0066] In summary, in the embodiments of this specification, the target data of the fixed device at the target inspection time is determined based on the change data of the relative position between the monitoring device and the fixed device. Then, based on the target position data, the displacement data of the ring main unit is determined. Thus, a protection signal can be sent based on the displacement data. This process determines the displacement data of the ring main unit by monitoring the change data of the relative position between the monitoring device and the fixed device. Since the relative position is easy to measure and multiple relative positions can be mutually verified and error compensated, the accuracy of the ring main unit displacement data can be improved, thereby enhancing the robustness of the ring main unit displacement electrical linkage protection control method.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for electrical linkage protection and control of displacement of a ring main unit, characterized in that, include: When the ring network box is installed, the fixed position data of the monitoring device fixed on the ground and the initial position data of multiple fixed devices fixed on the bottom surface of the ring network box are obtained. The monitoring device is fixed below the bottom surface of the ring network box. At the target monitoring time, data on the change in the relative position between the monitoring device and the fixed device are acquired. The relative position includes distance change data and angle change data. The relative position changes with the displacement of the ring network box. Based on the fixed position data, the initial position data, and the change data, the target position data of the fixed device at the target monitoring time is determined, and based on the target position data and the initial position data, the displacement data of the ring network box at the target monitoring time is determined; If the displacement data exceeds the displacement threshold, a protection signal is sent to the control unit so that the control unit can activate the electrical linkage protection device in the ring network box, thereby disconnecting the circuit of the ring network box.

2. The method according to claim 1, characterized in that, The fixing device includes a first fixing device, a second fixing device, and a third fixing device with different lines. Determining the displacement data of the ring network box at the target monitoring time based on the target position data and the initial position data includes: Based on the initial position data of the first fixing device, the second fixing device, and the third fixing device, determine the position data of the ring network box when it is installed. Based on the target position data of the first fixing device, the second fixing device, and the third fixing device, the position data of the ring network box at the target monitoring time is determined; Based on the position data of the ring network box when it is installed and the position data at the target monitoring time, the displacement data of the ring network box at the target monitoring time is determined.

3. The method according to claim 2, characterized in that, When the monitoring device includes a wire displacement sensor and a rotation angle encoder, acquiring the change data of the relative position between the monitoring device and the fixed device at the target monitoring time includes: At the target monitoring time, distance change data of the relative position is acquired from the pull-wire sensor, the pull-wire sensor is fixed to the monitoring device, and the pull-wire in the pull-wire sensor is connected to the fixing device; The relative position angle change data is obtained from the rotary angle encoder, which is used to monitor the angle change of the pull wire in the pull wire sensor.

4. The method according to claim 3, characterized in that, The tension of the pull wire in the pull wire sensor is less than a preset tension threshold.

5. The method according to claim 2, characterized in that, When the monitoring device includes a laser rangefinder and an inertial measurement module, acquiring the change data of the relative position between the monitoring device and the fixed device at the target monitoring time includes: At the target monitoring time, distance change data of the relative position is acquired from the laser ranging sensor. The laser ranging sensor is fixed to the monitoring device and is used to monitor the distance between the monitoring device and the fixed device. The inertial measurement module acquires the angular change data of the relative position. The inertial measurement module is used to monitor the angular change of the line connecting the monitoring device and the fixed device.

6. The method according to claim 1, characterized in that, The displacement thresholds include lateral displacement thresholds, longitudinal displacement thresholds, and rotational displacement thresholds. When the displacement data exceeds the displacement threshold, a protection signal is sent to the control unit to activate the electrical linkage protection device in the ring main unit, thereby disconnecting the circuit of the ring main unit. This includes: The displacement data is decomposed to determine the lateral displacement, longitudinal displacement, and rotational displacement of the ring network box at the target monitoring time. If the lateral displacement of the ring network box is greater than the lateral displacement threshold, the longitudinal displacement is greater than the longitudinal displacement threshold, or the rotational displacement is greater than the rotational displacement threshold at the target monitoring time, a protection signal is sent to the control unit so that the control unit activates the electrical linkage protection device in the ring network box, thereby disconnecting the circuit of the ring network box.

7. The method according to claim 1, characterized in that, The ring main unit displacement electrical linkage protection and control method further includes: When the ring network box and the supplementary ring network box are combined into a joint ring network box, the monitoring device of the ring network box is used as the monitoring device of the joint ring network box, and the monitoring device in the joint ring network box is used to monitor the fixed devices in the joint ring network box; From the fixing devices of the ring network box and the supplementary ring network box, select the fixing device of the combined ring network box, wherein at least one fixing device of the combined ring network box comes from the ring network box and at least one fixing device comes from the supplementary ring network box, and the fixing devices in the combined ring network box are not collinear; The displacement electrical linkage protection control of the combined ring network box is realized through the fixing device and monitoring device in the combined ring network box.

8. A ring main unit displacement electrical linkage protection and control device, characterized in that, include: The data module is used to acquire the fixed position data of the monitoring device fixed on the ground and the initial position data of multiple fixed devices fixed on the bottom surface of the ring network box when the ring network box is installed. The monitoring device is fixed below the bottom surface of the ring network box. The change module is used to acquire the change data of the relative position between the monitoring device and the fixed device at the target monitoring time. The relative position includes distance change data and angle change data. The relative position changes with the displacement of the ring network box. The displacement module is used to determine the target position data of the fixed device at the target monitoring time based on the fixed position data, the initial position data, and the change data, and to determine the displacement data of the ring network box at the target monitoring time based on the target position data and the initial position data. The protection module is used to send a protection signal to the control unit when the displacement data exceeds the displacement threshold, so that the control unit can activate the electrical linkage protection device in the ring network box and disconnect the circuit of the ring network box.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 7.

10. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

Images