Substation busbar insulation protection device and installation method thereof

Abstract

The invention discloses a transformer substation busbar insulation protection device which comprises two modularized device body units of an axisymmetric structure, each device body unit is composed of an arc-shaped shell, an n-shaped shell and a lug plate, and the two arc-shaped shells of the two device body units are fixed together through plastic bolts to form a circular cavity. The at least four lug plates of the two device body units are combined together in pairs to form at least two symmetrical extension parts, and the four n-shaped shells of the two device body units are combined together in pairs to form two symmetrical flat cavities. The invention further discloses an installation method of the transformer substation busbar insulation protection device. According to the transformer substation busbar insulation protection device and the installation method thereof, operation is easy, high-strength mechanical protection and insulation performance can be provided for a transformer substation busbar and an insulator, the assembly state and the assembly effect are monitored in real time, stability is good, and reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of substation busbar insulation protection, and specifically provides a substation busbar insulation protection device and an installation method thereof. Background Art

[0002] With the continuous and rapid growth of China's economy, the demand for electricity is increasing. Whether it is for daily household electricity consumption or for the production and operation activities of industries, commerce, and various enterprises, the dependence on electric energy is increasing day by day. As a key link in the power system, the main function of a substation is to convert high-voltage electric energy into voltage levels suitable for various users. In this process, the substation busbar plays a crucial role. As a channel for electric energy transmission, it not only undertakes the transmission tasks of high voltage and large current, but also must ensure high reliability and stability under various operating conditions.

[0003] The busbar insulation protection device is an electrical component commonly used in substations to protect busbars. During the operation of a substation, the medium and low voltage side busbars are in harsh environments such as high temperature and high humidity for a long time, which will accelerate the aging of the busbar insulation coating material and cause a decline in insulation performance; or due to accidental contact of external foreign objects such as iron wires and branches, faults such as short circuits may occur.

[0004] Most of the existing busbar insulation boxes use silicone rubber as the main material and are installed by snap-fastening. Their ability to withstand mechanical stress is not good, and problems such as loosening, skewing, and falling off are likely to occur after long-term use; after some snap-fastening assemblies are connected, since they cannot be seen from the outside, it is impossible to effectively judge the final connection state and effect, which is likely to cause the situation of improper manual assembly, thus greatly reducing the connection quality. When the original busbar insulation box uses silicone rubber material, when the insulation box component is deformed, the snap-fastening is likely to become loose or even break. Once it breaks, the entire insulation box cannot be restored or even scrapped. Summary of the Invention

[0005] The purpose of the present invention is to provide a substation busbar insulation protection device and an installation method thereof to solve the above defects.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A substation busbar insulation protection device, comprising: a modular two - half axially symmetric structure device body unit, where the device body unit is composed of an arc - shaped shell, an n - shaped shell, and ear plates. There are two n - shaped shells, and at least two ear plates are symmetrically installed on both side edges of the arc - shaped shell; the two arc - shaped shells of the two device body units are fixed together by plastic bolts to form a circular cavity. At least four ear plates of the two device body units are combined in pairs to form at least two symmetric extension parts, and the four n - shaped shells of the two device body units are combined in pairs to form two symmetric flat cavities. The extension parts and flat cavities are both arranged on the outer wall of the circular cavity.

[0008] Preferably, square notches are arranged on both side edges of the arc - shaped shell, the n - shaped shell is installed on the outer wall of the arc - shaped shell at the square notch, and the flat cavity formed by combining the two n - shaped shells penetrates through the square notch into the interior of the circular cavity.

[0009] Preferably, composite connection holes that penetrate each other are arranged on the two ear plates of the extension part. A conductive shielding layer and a stress - sensing optical fiber are installed in the composite connection holes; the plastic bolt passes through the composite connection hole and is locked and fixed in cooperation with an intelligent nut. A torque sensor and a wireless transmission module are installed in the intelligent nut to achieve precise fixation and real - time status monitoring of the two - half axially symmetric structure device body unit.

[0010] Preferably, at least two composite connection holes on the extension part are symmetrically arranged with each other.

[0011] Preferably, a diversion groove and a hydrophobic coating are arranged on the inner wall of the circular cavity.

[0012] Preferably, the circular cavity is fixed by at least two extension parts, and the position of the extension part is effectively sealed by using a gradient sealing structure.

[0013] Preferably, an installation method of a substation busbar insulation protection device includes the following steps:

[0014] S1. Insulator assembly:

[0015] The lower end of the two - half device body unit of the substation busbar insulation protection device is sleeved on the upper end of the insulator at a preset angle of 45°±2°. After adjusting the position, ensure that the insulator is completely accommodated in the circular cavity;

[0016] S2. Busbar assembly:

[0017] The two - half device body unit is pre - assembled by the horizontal insertion method. Adjust the initial pressure of the flat cavity, and then slowly insert the busbar to be installed into the flat cavity from the preset direction. At the same time, monitor the real - time data of the stress - sensing optical fiber and dynamically adjust the assembly parameters to ensure that the busbar is completely accommodated and evenly stressed.

[0018] S3. Intelligent locking and calibration:

[0019] The tightening state of the plastic bolt is monitored in real - time through a torque sensor. A hierarchical locking strategy is adopted. First, pre - tighten to 50% of the rated torque, and then gradually increase to 100%. During the locking process, the real - time data is uploaded to the monitoring system through a wireless transmission module to complete the locking of the protection device, thus completing the installation process of the entire substation busbar insulation protection device.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) For the substation busbar insulation protection device of the present invention, through the fixed locking of the extension part formed by fixing multiple ear plates with plastic bolts, the circular cavity formed provides additional mechanical protection for the entire substation busbar insulation protection device. It has good stability and is not prone to damage such as loosening, skewing, and falling off, which can further ensure that the insulation performance of the entire device is not affected by external forces. Through this structural design, the protection device can effectively prevent foreign objects such as iron wires and branches from directly contacting the busbar, reducing the risks of short - circuit and arc flashover.

[0022] (2) In the substation busbar insulation protection device of the present invention, through the application of stress - sensing optical fibers installed in the composite connection holes of the extension part and torque sensors and wireless transmission modules installed in the intelligent nuts used in conjunction with plastic bolts, precise fixation and real - time status monitoring of the two - half axisymmetric structure device body unit are realized, and the assembly status and assembly effect are displayed in real - time, greatly improving the connection quality.

[0023] (3) The installation method of the substation busbar insulation protection device of the present invention is simple to operate. It can realize the assembly and installation of the substation busbar insulation protection device with the busbar and insulator, and provide high - strength mechanical protection and insulation performance for the busbar and insulator, with good stability and high reliability. Brief Description of the Drawings

[0024] Figure 1 : Schematic structural diagram of the substation busbar insulation protection device of the present invention. Detailed Embodiments

[0025] The following further illustrates the present invention in conjunction with embodiments. It should be noted that it is merely an example and explanation of the inventive concept. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the inventive concept or exceed the scope defined by the claims of the present invention, they should be regarded as falling within the protection scope of the present invention.

[0026] Embodiment 1:

[0027] Figure 1 It is a schematic structural diagram of the substation busbar insulation protection device according to the embodiment of the present invention. As Figure 1 shown, a substation busbar insulation protection device includes: a device body unit with a modular two - half axisymmetric structure.

[0028] The device body units are all composed of an arc - shaped shell 1, an n - shaped shell, and ear plates. There are two n - shaped shells, and at least two ear plates are symmetrically installed on both side edges of the arc - shaped shell 1. The two arc - shaped shells 1 of the two device body units are fixed together by plastic bolts to form a circular cavity 2. At least four ear plates of the two device body units are combined in pairs to form at least two symmetric extension parts 3. The four n - shaped shells of the two device body units are combined in pairs to form two symmetric flat cavities 5. The extension parts 3 and the flat cavities 5 are both arranged on the outer wall of the circular cavity 2. The busbar of the substation is installed in the circular cavity 2, and the insulator of the substation is installed in the flat cavity 5.

[0029] For the substation busbar insulation protection device of the present invention, the extension parts 3 formed by fixing multiple ear plates with plastic bolts are fixed and locked. The formed circular cavity 2 provides additional mechanical protection for the entire substation busbar insulation protection device, with good stability and not easily prone to damage phenomena such as loosening, skewing, and falling off. When the substation busbar insulation protection device is subjected to external forces, due to the existence of the extension parts, any force is directed to the circular cavity 2, and the insulator inside the circular cavity 2 is not stressed, thus playing a role of protection and greatly improving the anti - deformation or anti - displacement ability of the entire substation busbar insulation protection device; more importantly, it can further ensure that the insulation performance of the entire device is not affected by external forces. Through this structural design, the protection device can effectively prevent foreign objects such as iron wires and tree branches from directly contacting the busbar, reducing the risks of short - circuit and arc flashover.

[0030] Embodiment 2:

[0031] Figure 1 It is a schematic structural diagram of the substation busbar insulation protection device according to the embodiment of the present invention. As Figure 1 shown, a substation busbar insulation protection device includes: a device body unit with a modular two - half axisymmetric structure.

[0032] The device body unit is composed of an arc-shaped housing 1, an n-shaped housing, and ear plates. There are two n-shaped housings, and at least two ear plates are symmetrically installed on both side edges of the arc-shaped housing 1.

[0033] The two arc-shaped housings 1 of the two device body units are fixed together by plastic bolts to form a circular cavity 2, and the busbars of the substation are installed in the circular cavity 2. A diversion groove and a hydrophobic coating are provided on the inner wall of the circular cavity 2 to optimize the installation environment and heat dissipation performance of the insulator.

[0034] At least four ear plates of the two device body units are combined in pairs to form at least two symmetrical extension parts 3, and the extension parts 3 are arranged on the outer wall of the circular cavity 2. The circular cavity 2 is fixed by at least two extension parts 3, and the position of the extension parts 3 is effectively sealed by using a gradient sealing structure.

[0035] Compound connection holes 4 that penetrate each other are provided on the two ear plates of the extension part 3. There are at least two compound connection holes 4 on the extension part 3 and they are symmetric to each other. A conductive shielding layer and a stress sensing optical fiber are installed in the compound connection holes 4. The plastic bolt passes through the compound connection holes 4 and is locked and fixed in cooperation with the intelligent nut. A torque sensor and a wireless transmission module are installed in the intelligent nut to achieve precise fixation and real-time status monitoring of the device body unit with a semi-split axisymmetric structure.

[0036] Square notches are provided on both side edges of the arc-shaped housing 1. The n-shaped housing is installed on the outer wall of the arc-shaped housing 1 at the square notch. The four n-shaped housings of the two device body units are combined in pairs to form two symmetrical flat cavities 5, which are both arranged on the outer wall of the circular cavity 2, and the flat cavities 5 penetrate through the square notches to the inside of the circular cavity 2. The insulators of the substation are installed in the flat cavities 5.

[0037] The substation busbar insulation protection device of the present invention is fixed and locked to the extension part 3 formed by fixing multiple ear plates through plastic bolts. The formed circular cavity 2 provides additional mechanical protection for the entire substation busbar insulation protection device, with good stability and not prone to damage phenomena such as loosening, skewing, and falling off. When the substation busbar insulation protection device is subjected to external forces, due to the existence of the extension part, any force is directed to the circular cavity 2, and the insulators inside the circular cavity 2 are not stressed, thus playing a role of protection, greatly improving the anti-deformation or displacement ability of the entire substation busbar insulation protection device; more importantly, it can further ensure that the insulation performance of the entire device is not affected by external forces. Through this structural design, the protection device can effectively prevent foreign objects such as iron wires and tree branches from directly contacting the busbars, reducing the risks of short circuits and arc flashovers.

[0038] In the substation busbar insulation protection device of the present invention, through the application of the stress sensing optical fiber installed in the composite connection hole 4 of the extension part 3 and the torque sensor and wireless transmission module installed in the intelligent nut used in cooperation with the plastic bolt, the precise fixation and real-time status monitoring of the device body unit with a two-half axisymmetric structure are realized, the assembly status and assembly effect are displayed in real time, and the connection quality is greatly improved.

[0039] Embodiment 3:

[0040] Figure 1 It is a schematic structural diagram of the substation busbar insulation protection device according to the embodiment of the present invention. As Figure 1 shown, a substation busbar insulation protection device includes: a modular device body unit with a two-half axisymmetric structure.

[0041] Each device body unit is composed of an arc-shaped shell 1, an n-shaped shell and ear plates. There are two n-shaped shells, and at least two ear plates are symmetrically installed on both side edges of the arc-shaped shell 1.

[0042] The two arc-shaped shells 1 of the two device body units are fixed together by plastic bolts to form a circular cavity 2, and the busbar of the substation is installed in the circular cavity 2. A diversion groove and a hydrophobic coating are provided on the inner wall of the circular cavity 2 to optimize the installation environment and heat dissipation performance of the insulator.

[0043] At least four ear plates of the two device body units are combined in pairs to form at least two symmetric extension parts 3, and the extension parts 3 are arranged on the outer wall of the circular cavity 2. The circular cavity 2 is fixed by at least two extension parts 3, and the position of the extension parts 3 is effectively sealed by using a gradient sealing structure.

[0044] On the two ear plates of the extension part 3, there are mutually penetrating composite connection holes 4. There are at least two composite connection holes 4 on the extension part 3 and they are symmetric to each other. A conductive shielding layer and a stress sensing optical fiber are installed in the composite connection holes 4. The plastic bolt penetrates through the composite connection holes 4 and is locked and fixed in cooperation with the intelligent nut. A torque sensor and a wireless transmission module are installed in the intelligent nut to realize the precise fixation and real-time status monitoring of the device body unit with a two-half axisymmetric structure.

[0045] Square notches are provided on both side edges of the arc-shaped shell 1. The n-shaped shell is installed on the outer wall of the arc-shaped shell 1 at the square notch. The four n-shaped shells of the two device body units are combined in pairs to form two symmetric flat cavities 5, which are both arranged on the outer wall of the circular cavity 2, and the flat cavities 5 penetrate through the square notches to the inside of the circular cavity 2, and the insulators of the substation are installed in the flat cavities 5.

[0046] The insulating and protective device for the substation busbar of the present invention fixes and locks the extension part 3 formed by fixing multiple ear plates through plastic bolts. The formed circular cavity 2 provides additional mechanical protection for the entire insulating and protective device of the substation busbar, with good stability and not prone to damage phenomena such as loosening, skewing, and falling off. When the insulating and protective device of the substation busbar is subjected to external forces, due to the existence of the extension part, any force is directed to the circular cavity 2, while the insulator inside the circular cavity 2 is not stressed, thus playing a role of protection, greatly improving the anti-deformation or anti-displacement ability of the entire insulating and protective device of the substation busbar; more importantly, it can further ensure that the insulation performance of the entire device is not affected by external forces. Through this structural design, the protective device can effectively prevent foreign objects such as iron wires and tree branches from directly contacting the busbar, reducing the risks of short circuit and arc flashover.

[0047] In the insulating and protective device for the substation busbar of the present invention, through the application of the stress sensing optical fiber installed in the composite connection hole 4 of the extension part 3 and the torque sensor and wireless transmission module installed in the intelligent nut used in conjunction with the plastic bolt, precise fixation and real-time status monitoring of the device body unit with a two-half axisymmetric structure are realized, and the assembly status and assembly effect are displayed in real time, greatly improving the connection quality.

[0048] An installation method for an insulating and protective device for a substation busbar includes the following steps:

[0049] S1. Insulator assembly:

[0050] Tilt the lower ends of the two-half device body units of the insulating and protective device for the substation busbar and socket them on the upper ends of the insulators at a preset angle of 45° ± 2°. After adjusting the position, ensure that the insulators are completely accommodated in the circular cavity 2;

[0051] S2. Busbar assembly:

[0052] Adopt the horizontal insertion method to pre-assemble the two-half device body units, adjust the initial pressure of the flat cavity 5, and then slowly insert the busbar to be installed into the flat cavity 5 from the preset direction. At the same time, monitor the real-time data of the stress sensing optical fiber and dynamically adjust the assembly parameters to ensure that the busbar is completely accommodated and evenly stressed;

[0053] S3. Intelligent locking and calibration:

[0054] Real-time monitor the tightening state of the plastic bolt through the torque sensor, adopt a hierarchical locking strategy, first pre-tighten to 50% of the rated torque, and then gradually increase to 100%; during the locking process, upload the real-time data to the monitoring system through the wireless transmission module to realize the locking of the protective device, thereby completing the installation process of the entire insulating and protective device for the substation busbar.

[0055] The installation method of the substation busbar insulation protection device of the present invention is simple in operation, can realize the assembly and installation of the substation busbar insulation protection device with the busbar and the insulator, and provides high-strength mechanical protection and insulation performance for the busbar and the insulator, with good stability and high reliability.

[0056] The above is an exemplary description of the invention. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An insulating protection device for a substation busbar, characterized in that, Comprising: A modular two - half axially symmetric structure device body unit, each of the device body units is composed of an arc - shaped housing (1), an n - shaped housing and ear plates. There are two n - shaped housings, and at least two ear plates are symmetrically installed on both side edges of the arc - shaped housing (1); the two arc - shaped housings (1) of the two device body units are fixed together by plastic bolts to form a circular cavity (2), at least four ear plates of the two device body units are combined in pairs to form at least two symmetric extension parts (3), and the four n - shaped housings of the two device body units are combined in pairs to form two symmetric flat cavities (5). The extension parts (3) and the flat cavities (5) are both arranged on the outer wall of the circular cavity (2).

2. The insulating and protecting device for substation busbars according to claim 1, characterized in that, Square notches are arranged on both side edges of the arc - shaped housing (1), the n - shaped housing is installed on the outer wall of the arc - shaped housing (1) at the square notch, and the flat cavity (5) formed by combining the two n - shaped housings penetrates through the square notch into the interior of the circular cavity (2).

3. The insulation protection device for the substation busbar according to claim 1, characterized in that, Compound connection holes (4) that communicate with each other are arranged on the two ear plates of the extension part (3), and a conductive shielding layer and a stress - sensing optical fiber are installed in the compound connection holes (4); the plastic bolts pass through the compound connection holes (4) and are locked and fixed in cooperation with intelligent nuts. A torque sensor and a wireless transmission module are installed in the intelligent nuts to achieve precise fixation and real - time status monitoring of the two - half axially symmetric structure device body unit.

4. The insulation protection device for substation busbars according to claim 3, characterized in that, There are at least two compound connection holes (4) on the extension part (3) and they are symmetric with each other.

5. The insulating and protecting device for substation busbars according to claim 1, characterized in that, Flow - guiding grooves and hydrophobic coatings are arranged on the inner wall of the circular cavity (2).

6. The insulation protection device for substation busbars according to claim 1, wherein, The circular cavity (2) is fixed by at least two extension parts (3), and the position of the extension part (3) is effectively sealed by using a gradient sealing structure.

7. An installation method of an insulating protection device for a substation busbar, based on the insulating protection device for a substation busbar according to any one of claims 1-6, characterized in that, Including the following steps: S1. Insulator assembly: Tilt the lower ends of the two - half device body units of the substation busbar insulation protection device at a preset angle of 45° ± 2° and socket them on the upper end of the insulator. After adjusting the position, ensure that the insulator is completely accommodated in the circular cavity (2); S2. Busbar assembly: Pre - assemble the two - half device body units by the horizontal insertion method, adjust the initial pressure of the flat cavity (5), then slowly insert the busbar to be installed into the flat cavity (5) from the preset direction, and at the same time monitor the real - time data of the stress - sensing optical fiber, dynamically adjust the assembly parameters to ensure that the busbar is completely accommodated and evenly stressed; S3. Intelligent locking and calibration: Real - time monitor the tightening state of the plastic bolts through the torque sensor, adopt a hierarchical locking strategy, first pre - tighten to 50% of the rated torque, and then gradually increase to 100%; during the locking process, upload the real - time data to the monitoring system through the wireless transmission module to complete the locking of the protection device, thus completing the installation process of the entire substation busbar insulation protection device.

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