GIS withstand voltage test monitoring device

Abstract

The utility model belongs to GIS pressure test technical field relates to a kind of GIS pressure test monitoring devices.The device includes mechanism box and control cabinet ontology;Control cabinet ontology is equipped with PLC controller, and control cabinet door is equipped with the display screen connected with PLC controller;Mechanism box is set outside GIS ontology, and drive motor and screw rod are equipped in mechanism box;Drive motor input end is connected with PLC controller, and output end is connected with screw rod;Screw rod is equipped with sliding block, and sliding block bottom connects operating mechanism;First position sensor and second position sensor respectively connected with PLC controller are installed on the inner wall of mechanism box, when sliding block displacement reaches first position sensor position, operating mechanism is in the state of switch off to place;When sliding block displacement reaches second position sensor position, operating mechanism is in the state of switch on to place.Solve the efficiency low, inconvenient operation, monitoring is not intuitive and other problems existing in operating mechanism switch control and state detection.

Description

Technical Field

[0001] This utility model belongs to the field of GIS pressure resistance testing technology, specifically relating to a GIS pressure resistance testing monitoring device. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) plays a crucial role in the transmission and distribution of power in modern power systems due to its excellent insulation performance, high reliability, and compact structural design. To ensure the safety and stability of GIS equipment after it is put into operation, withstand voltage testing is an essential and important testing step. During the withstand voltage test, the opening and closing control and status monitoring of the operating mechanism are the core operations of the entire test process.

[0003] Traditional GIS withstand voltage testing and monitoring devices have many limitations. From an operational perspective, operators need to frequently travel between the control terminal and the GIS equipment site, manually operating the mechanism to open and close the circuit. This operation method not only consumes a lot of manpower and time, but also poses certain risks to the personal safety of operators. At the same time, the high-intensity physical labor can easily lead to operator fatigue, thereby affecting the accuracy of operation and testing efficiency.

[0004] In terms of monitoring, there has been a lack of effective real-time monitoring methods in the past. Operators find it difficult to obtain accurate status information of the opening and closing of the operating mechanism intuitively and quickly, and usually can only rely on visual judgment. If the operating mechanism is not properly opened or closed, it can easily cause problems such as partial discharge and insulation breakdown during the withstand voltage test. This will not only interrupt the test process and delay the commissioning time of the power equipment, but may also cause equipment damage or even serious safety accidents, threatening the stable operation of the power system and the safety of people's lives and property.

[0005] With the advancement of the trend of intelligent and automated development of power systems, traditional GIS withstand voltage test monitoring devices can no longer meet the needs of modern power engineering for efficient, safe and accurate testing. It is necessary to develop new monitoring devices, solve existing problems through technological innovation, and improve the overall level of GIS withstand voltage testing.

[0006] For controlling the operating mechanism of GIS withstand voltage tests, the most suitable solution typically combines on-site manual operation with simple status monitoring. Operators must be physically present at the GIS equipment site to directly control the operating mechanism for opening and closing the circuit breaker via manual buttons or mechanical devices. Status monitoring often relies on simple devices such as the equipment's built-in mechanical position indicators. While this approach enables basic test operations, it lacks remote control capabilities and real-time, intuitive monitoring methods, failing to meet the high-efficiency and safe requirements of modern power testing. Utility Model Content

[0007] The purpose of this utility model is to provide a GIS withstand voltage test monitoring device to solve the problems of low efficiency, inconvenient operation, and unintuitive monitoring in the traditional GIS withstand voltage test, which are caused by the operation mechanism's opening and closing control and status detection.

[0008] This utility model is achieved through the following technical solution: This utility model discloses a GIS pressure resistance test monitoring device, including a mechanism box and a control cabinet body; the control cabinet body is located on one side of the GIS body; A PLC controller is fixedly installed inside the control cabinet body. A control cabinet door is rotatably installed on the front side of the control cabinet body, and a display screen is installed on the control cabinet door. The display screen is connected to the PLC controller and is used to display the status information of the operating mechanism. The mechanism box is located on the outside of the GIS body. The mechanism box contains a drive component for opening and closing the circuit breaker. The drive component includes a drive motor and a lead screw. The input end of the drive motor is connected to the PLC controller, and the output end is connected to the lead screw. A slider is installed on the lead screw, and an operating mechanism is connected to the bottom of the slider. A first position sensor and a second position sensor are installed on the inner wall of the mechanism box. The two position sensors are respectively connected to the PLC controller. When the slider moves to the position of the first position sensor, the operating mechanism is in the open position. When the slider moves to the position of the second position sensor, the operating mechanism is in the closed position.

[0009] Furthermore, the mechanism box is provided with an inner box, which includes a cover plate and two fixed plates fixedly installed on the inner wall of the mechanism box. The cover plate is perpendicularly connected to the two fixed plates; the drive motor is fixedly connected to the fixed plate located at the top. The lead screw passes through two fixed plates, and the slider is located between the two fixed plates.

[0010] Furthermore, a longitudinal groove is provided on the cover plate, and a guide block that cooperates with the groove is fixedly provided on the outside of the slider.

[0011] Furthermore, the first displacement sensor is located on the upper side, and the second displacement sensor is located on the lower side.

[0012] Furthermore, each control cabinet door is fixedly equipped with a power switch, and power indicator lights are installed on both sides of the power switch.

[0013] Furthermore, multiple mechanism interfaces are provided on the control cabinet door and near the bottom; Multiple control relays are fixedly installed inside the control cabinet and below the PLC controller; The output terminal of the control relay is connected to the mechanism interface in a one-to-one manner. The drive motor is connected to one of the mechanism interfaces.

[0014] Furthermore, the output terminal of the display screen is connected to the input terminal of the PLC controller via a signal line. The output terminal of the PLC controller has two signal lines, one of which is connected to the input terminal of the display screen, and the other signal line is connected to the input terminal of one of the control relays.

[0015] Furthermore, the output terminal of the control relay is connected to one of the mechanism interfaces via a signal line, and the drive motor is equipped with a quick-connect signal line that cooperates with the mechanism interface.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model discloses a GIS withstand voltage test monitoring device, including a mechanism box and a control cabinet. The control cabinet contains a PLC controller, and the mechanism box contains a drive motor, a lead screw, a first position sensor, and a second position sensor. The two position sensors correspond to the open and closed states, respectively. The drive motor is connected to the lead screw, and a slider is mounted on the lead screw. The drive motor drives the slider to move through the lead screw, and the position sensors capture the slider's position in real time, directly providing feedback on the end point of the operating mechanism's action. This design avoids the lag of traditional methods that rely on mechanical limits or indirect signals to determine the state, ensuring accurate knowledge of whether the operating mechanism is in the target position during the withstand voltage test. The display screen on the control cabinet door is connected to the PLC controller, converting the position sensor signals into visual status information, such as open or closed. Test personnel can monitor the operating mechanism's status in real time through the display screen without closely observing the inside of the mechanism box, reducing manual intervention under high-voltage conditions and lowering the risk of electric shock or equipment misoperation.

[0017] When the slider moves to the position of the first position sensor, the operating mechanism is in the open position; when the slider moves to the position of the second position sensor, the operating mechanism is in the closed position. By directly linking the open and closed positions of the operating mechanism through position sensors, the uncertainty of inferring the state through indirect parameters such as current and pressure is avoided. In withstand voltage tests, if the open position is mistakenly judged to be in place when the actual mechanism is not fully open, a short circuit may occur when the test voltage is applied. This device, through its physical position-triggered judgment method, significantly reduces the risk of such misjudgments, ensuring test safety.

[0018] Furthermore, the inner casing forms an independent space through the cover plate and the fixing plate, integrating the lead screw and slider inside. This not only protects the components from the influence of gases or impurities inside the GIS body, but also facilitates overall installation, inspection and replacement, reducing maintenance costs.

[0019] Furthermore, multiple mechanism interfaces on the control cabinet door are connected one-to-one with the control relays inside the control cabinet, and the drive motor is connected to the controller through these mechanism interfaces. This design allows the device to be adapted to different models of GIS equipment or drive motors, expanding application scenarios simply through interface matching, enhancing the device's versatility and compatibility, and making it particularly suitable for pressure testing scenarios involving multiple types of GIS equipment. Real-time monitoring reduces the time spent on repeated manual status checks, allowing operators to monitor multiple devices simultaneously, further improving testing efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 A partial structural diagram of the central mechanism box; Figure 3 for Figure 2 A schematic diagram of the decomposed structure; Figure 4 for Figure 1 Schematic diagram of the internal structure of the central control cabinet; Figure 5 This is a schematic diagram of the working principle of the control circuit of this utility model.

[0021] In the diagram: 1. GIS body; 2. Control cabinet body; 3. Mechanism box; 4. Manual hole; 5. Fixing plate; 6. Cover plate; 7. Slide rail; 8. Drive motor; 9. Lead screw; 10. Slider; 11. Guide block; 12. Control cabinet door; 13. Power switch; 14. Power indicator light; 15. Display screen; 16. Mechanism interface; 17. PLC controller; 18. Control relay; 191. First position sensor; 192. Second position sensor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it; that is, the described embodiments are only a part of, and not all, of the embodiments of this utility model.

[0023] The components described and illustrated in the accompanying drawings and embodiments of this utility model can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of this utility model provided in the following drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate one selected embodiment of the utility model. All other embodiments obtained by those skilled in the art based on the accompanying drawings and embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0024] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, element, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to the process, element, method, article, or apparatus.

[0025] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0026] like Figure 1-5 As shown, this utility model discloses a monitoring device for GIS pressure resistance test, including a mechanism box 3 and a control cabinet body 2; the control cabinet body 2 is located on one side of the GIS body 1; the front side of the control cabinet body 2 is rotatably provided with a control cabinet door 12, and the mechanism box 3 is located on the outside of the GIS body 1.

[0027] Furthermore, in combination Figure 3 As shown, a manual hole 4 is provided on the bottom wall of the mechanism box 3, and an operating mechanism for opening and closing the circuit breaker passes through the manual hole 4. A drive component for opening and closing the circuit breaker is fixed inside the mechanism box 3.

[0028] Furthermore, in combination Figure 2 and Figure 3 As shown, the drive assembly includes two fixed plates 5 fixedly mounted on the inner wall of the mechanism housing 3. A cover plate 6 is fixedly mounted on the outer side between the two fixed plates 5, and the cover plate 6 is perpendicularly connected to the two fixed plates 5 to form a U-shaped structure. A longitudinal groove 7 is formed on the cover plate 6. A drive motor 8 is fixedly mounted on the top fixed plate 5. The main circuit of the drive motor 8 is connected to an external power supply line through a power source. A lead screw 9 is fixedly mounted on the power output end of the drive motor 8, passing through the two fixed plates 5. A slider 10 is mounted on the lead screw 9 and located between the two fixed plates 5. The slider 10 is connected to the operating mechanism. A guide block 11 that cooperates with the groove 7 is fixedly mounted on the outer side of the slider 10. When the slider 10 moves to the position of the first position sensor 191, the operating mechanism is in the open position. When the slider 10 moves to the position of the second position sensor 192, the operating mechanism is in the closed position.

[0029] Specifically in this embodiment, combined with Figure 1 As shown, each of the control cabinet doors 12 is fixedly equipped with a power switch 13. Power indicator lights 14 are provided on both sides of the power switch 13 on the control cabinet door 12. A display screen 15 is embedded on the control cabinet door 12 and on top of the power switch 13. Preferably, the display screen 15 is connected to an external power source via a power cord. Multiple mechanism interfaces 16 are provided on the control cabinet door 12 near the bottom.

[0030] Combination Figure 4 As shown, a PLC controller 17 is fixedly installed inside the control cabinet body 2. The input terminal of the PLC controller 17 is connected to an external power source via a power line. A power switch 13 is connected in series on the power line to control the circuit to be powered on and off. Multiple control relays 18 are fixedly installed inside the control cabinet body 2 and below the PLC controller 17.

[0031] Specifically, in this embodiment, the output terminal of the display screen 15 is connected to the input terminal of the PLC controller 17 via a signal line. The output terminal of the PLC controller 17 has two signal lines, one of which is connected to the input terminal of the display screen 15, and the other signal line is connected to the input terminal of one of the control relays 18. The output terminal of the control relay 18 is connected one-to-one with the mechanism interface 16 via a signal line. The drive motor 8 is provided with a quick-connect signal line that cooperates with the mechanism interface 16.

[0032] Preferably, the PLC controller 17 controls the relay 18 and the drive motor 8 to cooperate, and the rotation of the drive motor 8 can be remotely controlled on the display screen 15. The rotation of the drive motor 8 can drive the gate on the GIS body to realize the function of closing or opening the gate. By remotely controlling the closing or opening operation on the display screen 15, the physical burden is greatly reduced, the work efficiency is improved, and the personal safety of the existing operators when manually controlling the closing or opening is avoided.

[0033] Specifically, the model of the PLC controller 17 of this utility model is SIMATIC S7-200SMART.

[0034] Specifically in this embodiment, combined with Figure 2 and Figure 3 As shown, two position sensors, each cooperating with the slider 10, are fixedly installed on the inner wall of the power box 3 between two fixed plates 5. These are a first position sensor 191 located on the upper side and a second position sensor 192 located on the lower side. The two position sensors are connected to the input terminal of the PLC controller 17 via signal lines, and the output terminal of the PLC controller 17 is connected to the input terminal of the display screen 15 via signal lines. The position sensors monitor whether the circuit breaker is closed or open. When the circuit breaker is closed or open, the slider 10 moves to one of the position sensors. After the slider 10 engages with the position sensor, the sensor transmits a signal to the PLC controller 17. The PLC controller 17 receives and processes the signal, then transmits the processed signal to the display screen 15, where the closed or open status can be seen. This allows for quick and accurate determination of whether the circuit breaker is in position, effectively preventing test interruptions and safety accidents caused by improper operation or misjudgment.

[0035] Typical withstand voltage tests are divided into main transformer withstand voltage tests, bus coupler withstand voltage tests, and protection withstand voltage tests. Therefore, in the design of this utility model, if... Figure 5 As shown, the main transformer withstand voltage module, bus tie withstand voltage module, and protection withstand voltage module are integrated on the display screen 15, facilitating various types of withstand voltage tests. Multiple monitoring devices are installed at different locations on the GIS body 1, with identical connection methods.

[0036] Working principle: First, select one of the modes (main transformer withstand voltage module, bus tie withstand voltage module, or protection withstand voltage module) on the touch screen of display screen 15. After selecting one of the modes, a normally open or normally closed switch will be displayed. When the normally open switch is touched, the switch is closed, and display screen 15 sends a signal to PLC controller 17. PLC controller 17 receives the signal and processes it. The processed signal sends two signals from PLC controller 17. One signal is returned to display screen 15, where the normally closed symbol appears. The other signal is transmitted to the corresponding control relay 18 of PLC controller 17. The output terminal of control relay 18 is connected to the drive motor 8, which drives the operating mechanism to close the circuit. After working for a certain period of time, drive motor 8 stops, completing the closing action.

[0037] When the operating mechanism closes the circuit, the slider 10 moves to the second position sensor 192. The second position sensor 192 transmits a signal to the PLC controller 17. The PLC controller 17 receives and processes the signal, and then transmits the processed signal to the display screen 15, where the normal closing status is displayed. Conversely, if the slider 10 cannot move to the second position sensor 192 after the mechanism closes the circuit, the second position sensor 192 transmits the current signal to the PLC controller 17. The PLC controller 17 receives and processes the signal, and then transmits the processed signal to the display screen 15, where the display screen 15 displays that the mechanism is not fully closed and shows a "warning symbol".

[0038] When the control circuit controls the drive motor 8 to rotate, the drive motor 8 rotates and drives the lead screw 9 at the power output end to rotate. When the lead screw 9 rotates, the slider 10 that cooperates with it completes the sliding. During the sliding process of the slider 10, the drive mechanism completes the closing or opening action.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A GIS pressure resistance test monitoring device, characterized in that, It includes a mechanism box (3) and a control cabinet body (2); the control cabinet body (2) is located on one side of the GIS body (1); A PLC controller (17) is fixedly installed inside the control cabinet body (2). A control cabinet door (12) is rotatably installed on the front side of the control cabinet body (2). A display screen (15) is provided on the control cabinet door (12). The display screen (15) is connected to the PLC controller (17). The mechanism box (3) is located outside the GIS body (1). The mechanism box (3) is equipped with a drive assembly for opening and closing the circuit breaker. The drive assembly includes a drive motor (8) and a lead screw (9). The input end of the drive motor (8) is connected to the PLC controller (17), and the output end is connected to the lead screw (9). A slider (10) is provided on the lead screw (9), and an operating mechanism is connected to the bottom of the slider (10). A first position sensor (191) and a second position sensor (192) are installed on the inner wall of the mechanism box (3). The two position sensors are respectively connected to the PLC controller (17). When the slider (10) moves to the position of the first position sensor (191), the operating mechanism is in the open position state. When the slider (10) moves to the position of the second position sensor (192), the operating mechanism is in the closed position state.

2. The GIS pressure resistance test monitoring device according to claim 1, characterized in that, The mechanism box (3) is provided with an inner box, which includes a cover plate (6) and two fixed plates (5) fixedly installed on the inner wall of the mechanism box (3). The cover plate (6) is vertically connected to the two fixed plates (5); the drive motor (8) is fixedly connected to the fixed plate (5) located at the top. The lead screw (9) passes through the two fixed plates (5), and the slider (10) is located between the two fixed plates (5).

3. The GIS pressure resistance test monitoring device according to claim 1, characterized in that, The cover plate (6) has a longitudinal groove (7), and the outer side of the slider (10) is fixedly provided with a guide block (11) that cooperates with the groove (7).

4. The GIS pressure resistance test monitoring device according to claim 1, characterized in that, The first displacement sensor (191) is located on the upper side, and the second displacement sensor (192) is located on the lower side.

5. The GIS pressure resistance test monitoring device according to claim 1, characterized in that, Each control cabinet door (12) is fixedly equipped with a power switch (13), and power indicator lights (14) are installed on both sides of the power switch (13).

6. The GIS pressure resistance test monitoring device according to claim 1, characterized in that, Multiple mechanism interfaces (16) are provided on the control cabinet door (12) and near the bottom. Multiple control relays (18) are fixedly installed inside the control cabinet body (2) and below the PLC controller (17). The output terminal of the control relay (18) is connected one-to-one with the mechanism interface (16); The drive motor (8) is connected to one of the mechanism interfaces (16).

7. The GIS pressure resistance test monitoring device according to claim 6, characterized in that, The output terminal of the display screen (15) is connected to the input terminal of the PLC controller (17) via a signal line. The output terminal of the PLC controller (17) has two signal lines, one of which is connected to the input terminal of the display screen (15), and the other signal line is connected to the input terminal of one of the control relays (18).

8. The GIS pressure resistance test monitoring device according to claim 6, characterized in that, The output terminal of the control relay (18) is connected to one of the mechanism interfaces (16) via a signal line. The drive motor (8) is provided with a quick-connect signal line that cooperates with the mechanism interface (16).

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