Power grid partial discharge monitoring equipment based on gas detection

Abstract

The utility model relates to the technical field of partial discharge monitoring, in particular to power grid partial discharge monitoring equipment based on gas detection, which comprises a power supply, a plurality of monitoring devices, an alarm and a remote host, each monitoring device comprises an installation box, the installation box is movably connected with a cable, a gas sensor is installed inside the installation box, and the alarm is connected with the remote host. A monitoring hole is formed in the top of the mounting box, the monitoring end of each gas sensor is located on the inner side of the monitoring hole, the multiple monitoring devices with the gas sensors are arranged and used for monitoring the situation that rubber and other parts are subjected to high temperature to generate gas due to the local phenomenon in the electric power facility, the generated gas can be detected, and the safety of the electric power facility is improved. According to the monitoring device, gas is detected, detection signals are output outwards, the detection precision is improved, and the problems that an existing monitoring device adopts a sound amplification function and utilizes decibel values to distinguish difference of partial discharge, initial partial discharge and partial discharge of a closed switch cannot be monitored, and the detection precision is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of partial discharge monitoring, in particular to a power grid partial discharge monitoring device based on gas detection. Background Art

[0002] The power facilities in the power grid include high-voltage circuit breakers or switches, high-voltage buses, high-voltage cable joints, low-voltage high-current switches, low-voltage buses and transformers, etc. These facilities are generally formed by joints or windings, and are insulated by insulating layers such as insulating paint, air, etc., so that the current can flow completely through the set path without leakage when the load is fixed or changing. At this time, no partial discharge occurs. If the insulation deteriorates and the contact is incomplete, the current cannot flow completely through the set path when the load is fixed or changing, and leakage arcs are generated, which is the so-called partial discharge. Partial discharge will cause the temperature of the power facilities to rise abnormally and generate ultrasonic waves due to the arc, thereby shortening the life of the power facilities in the power grid and even causing failure of the power facilities in the power grid.

[0003] Existing partial discharge monitoring solutions generally use ultrasonic monitoring to monitor the sound waves appearing in partial discharge, and convert the monitored sound waves appearing in partial discharge into electrical signals, which are recorded on tape for analysis. The difference in transmission time between the electrical signal and the acoustic signal can be used to obtain the distance from the detection point to the partial discharge point. This is different from using sound amplification and using decibel values ​​to distinguish partial discharge. In the early stages of partial discharge and partial discharge of closed switches may not be monitored, affecting the accuracy of detection.

[0004] Therefore, it is necessary to provide a power grid partial discharge monitoring device based on gas detection to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a power grid partial discharge monitoring device based on gas detection.

[0006] The utility model provides a power grid partial discharge monitoring device based on gas detection, comprising: a power supply, a plurality of monitoring devices, an alarm and a remote host, wherein the monitoring device comprises an installation box, the installation box is movably connected to a cable, a gas sensor is installed inside the installation box, a monitoring hole is provided on the top of the installation box, a monitoring end of the gas sensor is located on the inner side of the monitoring hole, the gas sensor is electrically connected to a signal amplifier, the signal amplifier is electrically connected to a microprocessor through an A / D conversion module, the signal amplifier, the A / D conversion module and the microprocessor are installed inside the installation box, the microprocessor is connected to the alarm and the remote host through a network, and the remote host is connected to a portable device through a network.

[0007] Preferably, the power supply includes a power supply, a resonant circuit, a step-down circuit and a voltage stabilizing circuit, the resonant circuit is connected to the power supply and the step-down circuit respectively, and the step-down circuit is connected to the resonant circuit and the voltage stabilizing circuit respectively.

[0008] Preferably, the installation box includes a box body, the end face of the box body is connected to the installation plate, the end face of the installation plate is provided with a connecting groove, the upper end of the inner wall of the connecting groove is slidably connected to the upper fixing plate, the upper part of the upper fixing plate is provided with a fixing hole, and the fixing hole is threadedly connected to the fixing rod.

[0009] Preferably, the lower end of the inner wall of the connecting groove is an arc-shaped structure, the bottom end of the upper fixing plate is an arc-shaped structure, and the top of the upper fixing plate is provided with a limiting screw hole that cooperates with the fixing rod.

[0010] Preferably, the top of the upper fixed plate is connected to a U-shaped sliding plate, the sliding plate is slidably connected to a sliding groove, and the fixing hole is arranged on the inner side of the sliding groove.

[0011] Preferably, a plurality of photovoltaic panels are installed on the outer surface of the box body, the photovoltaic panels are electrically connected to a battery charging module, the battery charging module is connected to a power supply, and the battery charging module is installed inside the box body.

[0012] Compared with the related art, the power grid partial discharge monitoring device based on gas detection provided by the utility model has the following beneficial effects:

[0013] 1. The utility model is provided with a plurality of monitoring devices with gas sensors, which are used to monitor the gas generated by rubber and other parts under high temperature due to the local phenomenon in the power facilities. The generated gas can be detected and the detection signal can be output externally to improve the detection accuracy. In addition, by detecting the gas, the existing monitoring device adopts the sound amplification function and uses the decibel value to distinguish the difference of partial discharge, and the initial partial discharge and the partial discharge of the closed switch cannot be detected, which affects the detection accuracy;

[0014] 2. This novel method uses an installation box that is movably connected to the cable. The installation box can be moved forward and backward according to needs, and the distance between the installation boxes can be changed to improve the monitoring accuracy of the monitoring equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A connection diagram of a power grid partial discharge monitoring device based on gas detection provided by the utility model;

[0016] Figure 2 for Figure 1 A schematic structural diagram of a power grid partial discharge monitoring device based on gas detection is shown;

[0017] Figure 3 for Figure 1 The structural schematic diagram of the installation box shown;

[0018] Figure 4 for Figure 1 The connection diagram of the monitoring device shown;

[0019] Figure 5 for Figure 1 The structural schematic diagram of the power supply shown;

[0020] Numbers in the figure: 1, cable; 2, installation box; 3, fixing rod; 4, photovoltaic panel; 5, monitoring hole; 6, gas sensor; 7, box body; 8, mounting plate; 9, upper fixing plate; 10, fixing hole; 11, sliding plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", "third", etc. appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] A new type of specific implementation of a power grid partial discharge monitoring device based on gas detection is described in detail below in conjunction with specific embodiments.

[0028] refer to Figure 1 , Figure 4 The utility model provides a power grid partial discharge monitoring device based on gas detection, comprising: a power supply, a plurality of monitoring devices, an alarm and a remote host, wherein the monitoring device comprises an installation box 2, wherein the installation box 2 is movably connected to a cable 1, wherein a gas sensor 6 is installed inside the installation box 2, wherein a monitoring hole 5 is provided on the top of the installation box 2, wherein a monitoring end of the gas sensor 6 is located on the inner side of the monitoring hole 5, wherein the gas sensor 6 is electrically connected to a signal amplifier, wherein the signal amplifier is electrically connected to a microprocessor through an A / D conversion module, wherein the signal amplifier, the A / D conversion module and the microprocessor are installed inside the installation box 2, wherein the microprocessor is connected to the alarm and the remote host through a network, and wherein the remote host is connected to a portable device through a network.

[0029] It should be noted that: the power supply can be used to provide stable power supply to multiple monitoring devices, the installation box 2 can protect the gas sensor 6 and other components in the monitoring device to prevent damage caused by foreign objects and external forces during use, affecting subsequent use, and the gas sensor 6 can be used to monitor the local phenomenon in the power facilities, causing rubber and other parts to produce gas due to high temperature, and can detect the generated gas and output the detection signal to the outside, and amplify the detection signal through the signal amplifier, filter the amplified signal, and transmit the filtered signal to the A / D conversion module, and feed the electrical signal converted from the detection signal into the microprocessor. The microprocessor calculates the gas concentration based on the received electrical signal, and makes a judgment based on the gas concentration to obtain the judgment result, and sends the judgment result to the alarm through the network. According to the judgment result, the alarm is activated to send an alarm signal to remind the monitoring personnel, and the remote host can send an alarm signal to the portable device, so that the monitoring personnel outside can be informed at the first time, thereby improving the monitoring efficiency. The portable device can be a mobile phone.

[0030] In the embodiments of the present invention, reference is made to Figure 5 As shown, the power supply includes a power supply, a resonant circuit, a step-down circuit and a voltage stabilizing circuit. The resonant circuit is connected to the power supply and the step-down circuit respectively, and the step-down circuit is connected to the resonant circuit and the voltage stabilizing circuit respectively.

[0031] It should be noted that: the power supply is a direct current power supply, which is used to provide power supply energy; the resonant circuit is used to filter the provided power supply energy; the step-down circuit is used to step down the filtered power supply energy; and the voltage stabilizing circuit is used to stabilize the stepped-down power supply energy into a stable power supply energy.

[0032] In the embodiments of the present invention, reference is made to Figure 3 As shown, the installation box 2 includes a box body 7, the end face of the box body 7 is connected to the installation plate 8, the end face of the installation plate 8 is provided with a connecting groove, the upper end of the inner wall of the connecting groove is slidably connected to the upper fixing plate 9, and a fixing hole 10 is provided above the upper fixing plate 9, and the fixing hole 10 is threadedly connected to the fixing rod 3.

[0033] In the embodiments of the present invention, reference is made to Figure 3 As shown, the lower end of the inner wall of the connecting groove is an arc-shaped structure, the bottom end of the upper fixing plate 9 is an arc-shaped structure, and the top of the upper fixing plate 9 is provided with a limiting screw hole that cooperates with the fixing rod 3.

[0034] In the embodiments of the present invention, reference is made to Figure 3As shown, the top of the upper fixing plate 9 is connected to a U-shaped sliding plate 11, the sliding plate 11 is slidably connected to the sliding groove, and the fixing hole 10 is arranged on the inner side of the sliding groove.

[0035] It should be noted that: by sliding the top of the inner wall of the connecting groove to connect the upper fixing plate 9, the cable 1 can be placed inside the connecting groove, and the upper fixing plate 9 is moved downward to contact the cable 1, and the fixing rod 3 is rotated downward to connect with the upper fixing plate 9 to achieve the limitation of the upper fixing plate 9, thereby realizing the connection between the connecting groove and the cable 1 and ensuring the stability of the connection.

[0036] In the embodiments of the present invention, reference is made to Figure 1 As shown, a plurality of photovoltaic panels 4 are installed on the outer surface of the box body 7 , and the photovoltaic panels 4 are electrically connected to a battery charging module, and the battery charging module is connected to a power supply, and the battery charging module is installed inside the box body 7 .

[0037] It should be noted that: the photovoltaic panel 4 can convert sunlight into the electrical energy required for the operation of the entire monitoring device, and the battery charging module can be used to charge the power supply with the electrical energy generated by the photovoltaic power taking module, thereby improving the applicability of the device.

[0038] The working principle of the power grid partial discharge monitoring device based on gas detection provided by the utility model is as follows:

[0039] Through the power supply, it can be used to provide stable power supply to multiple monitoring devices. The installation box 2 can protect the gas sensor 6 and other components in the monitoring device to prevent them from being damaged by foreign objects and external forces during use, which will affect the subsequent use. The gas sensor 6 can be used to monitor the local phenomenon in the power facilities, which causes rubber and other parts to produce gas under high temperature. The generated gas can be detected and the detection signal can be output to the outside. The detection signal can be amplified through the signal amplifier, and the amplified signal can be filtered, and the filtered signal can be transmitted to the A / D conversion module; the electrical signal converted from the detection signal is fed into the microprocessor, and the microprocessor calculates according to the received electrical signal to obtain the gas concentration, and makes a judgment according to the gas concentration to obtain the judgment result, and sends the judgment result to the alarm through the network. According to the judgment result, the alarm is activated to send an alarm signal to remind the monitoring personnel, and the remote host can send an alarm signal to the portable device, so that the monitoring personnel outside can be informed at the first time, thereby improving the monitoring efficiency.

[0040] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power grid partial discharge monitoring device based on gas detection, characterized in that: include: A power supply, a plurality of monitoring devices, an alarm and a remote host, wherein the monitoring device comprises an installation box (2), the installation box (2) is movably connected to a cable (1), a gas sensor (6) is installed inside the installation box (2), a monitoring hole (5) is provided on the top of the installation box (2), a monitoring end of the gas sensor (6) is located inside the monitoring hole (5), the gas sensor (6) is electrically connected to a signal amplifier, the signal amplifier is electrically connected to a microprocessor via an A / D conversion module, the signal amplifier, the A / D conversion module and the microprocessor are installed inside the installation box (2), the microprocessor is connected to the alarm and the remote host via a network, and the remote host is connected to a portable device via a network.

2. A power grid partial discharge monitoring device based on gas detection according to claim 1, characterized in that: The power supply includes a power supply, a resonant circuit, a step-down circuit and a voltage stabilizing circuit. The resonant circuit is connected to the power supply and the step-down circuit respectively, and the step-down circuit is connected to the resonant circuit and the voltage stabilizing circuit respectively.

3. A power grid partial discharge monitoring device based on gas detection according to claim 1, characterized in that: The installation box (2) comprises a box body (7), the end face of the box body (7) is connected to a mounting plate (8), the end face of the mounting plate (8) is provided with a connecting groove, the upper end of the inner wall of the connecting groove is slidably connected to an upper fixing plate (9), a fixing hole (10) is provided above the upper fixing plate (9), and the fixing hole (10) is threadedly connected to a fixing rod (3).

4. A power grid partial discharge monitoring device based on gas detection according to claim 3, characterized in that: The lower end of the inner wall of the connecting groove is an arc-shaped structure, the bottom end of the upper fixing plate (9) is an arc-shaped structure, and the top of the upper fixing plate (9) is provided with a limiting screw hole that cooperates with the fixing rod (3).

5. A gas detection-based partial discharge monitoring device for power grid according to claim 4, characterized in that: The top of the upper fixing plate (9) is connected to a U-shaped sliding plate (11), the sliding plate (11) is slidably connected to a sliding groove, and the fixing hole (10) is arranged on the inner side of the sliding groove.

6. A gas detection-based partial discharge monitoring device for power grid according to claim 5, characterized in that: A plurality of photovoltaic panels (4) are mounted on the outer surface of the box body (7); the photovoltaic panels (4) are electrically connected to a battery charging module; the battery charging module is connected to a power supply; and the battery charging module is mounted inside the box body (7).

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