Intelligent maintenance auxiliary device for disconnecting switch

Abstract

The invention provides an intelligent maintenance auxiliary device for an isolating switch. Comprising an external module and a built-in module, the external module comprises an external connection wire and an isolation switch, and the built-in module comprises a positioning module, an acquisition module, a data processing module and a display module; the positioning module is used for monitoring a crank arm position signal of the high-voltage isolation switch; the acquisition module is used for completing data acquisition of position information provided by the gyroscope module; the data processing module is used for receiving the position signal of each axis of each phase uploaded by the acquisition module; and the display module can display three-dimensional information of the position of the gyroscope module at the moment, and when three-phase displayed data meet requirements or errors are within an acceptable range, it is proved that the position of the disconnecting switch is adjusted properly at the moment. The external module comprises an external connection wire, when the three phases are checked to be synchronous, the external connection wire is connected to the second phase and the third phase, any one phase is contacted firstly, and the device sends out an indication signal to replace manpower. The auxiliary device is suitable for intelligent maintenance of the disconnecting switch.

Description

Technical Field

[0001] The invention provides the adjustment of the isolating switch, specifically an intelligent maintenance auxiliary device for the isolating switch. Background Art

[0002] Isolating switch is a switching device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high working reliability requirements, it has a great impact on the design, construction and safe operation of substations and power plants.

[0003] The main feature of the isolating switch is that it has no arc extinguishing ability and can only open and close the circuit without load current. The isolating switch is mainly used to isolate the power supply, switch operation, connect and disconnect the low current circuit, play an isolating role in the circuit, and is widely used in the power system. Most high-voltage isolating switches require on-site assembly of various components, but the installation foundation and bracket platform are large, and the flange surface is uneven due to extensive manufacturing methods or long-term use, which requires constant adjustment during on-site commissioning and relies heavily on the experience of workers. It is time-consuming and laborious, and the installation quality cannot be fully guaranteed, which often leads to deviation of the contact insertion position, uneven force on the contact fingers, difficulty in opening and closing, and additional stress on the porcelain column, which buries hidden dangers for subsequent long-term normal operation.

[0004] There are several points to check the status of the isolating switch: For single phase, check whether the conductive rod of the contact finger and the contact head are on the same horizontal plane; whether the contact between the contact finger and the contact head is good and whether the insertion depth is appropriate; For three-phase, it is also necessary to check whether the three-phase synchronization is qualified.

[0005] When the above items are unqualified, adjustments need to be made. The traditional method of synchronous adjustment of three-phase is that three people adjust together until the contact fingers of one phase touch first. The adjustment of the contact condition and insertion depth of the contact fingers and contacts is more complicated, and a specialized person is required to check under the switch with the naked eye based on experience. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present invention proposes an intelligent maintenance auxiliary device for isolating switches to solve the problems of deviation of the insertion position of isolating switch contacts, uneven force on the contact fingers, difficulty in opening and closing, and additional stress on the porcelain column. The auxiliary device solves the technical problems of isolating switch contacts through an electronic positioning module, a collection module, a data processing module, and a display module.

[0007] The solution adopted by the present invention to solve the technical problem is: It includes external modules and internal modules. The external modules include external wiring and isolating switches. The internal modules include positioning modules, acquisition modules, data processing modules and display modules. A positioning module is used to monitor the position signal of the turning arm of the high-voltage disconnector. The positioning module includes an A, B, C three-phase gyroscope module, an A, B, C three-phase accelerometer module, and a magnetometer that provides the direction information of the high-voltage disconnector relative to the earth's magnetic field; they are respectively installed on the corresponding turning arms of the high-voltage disconnector to measure the position of the turning arm in the x-axis, y-axis and z-axis directions, and convert the position into a processable electrical signal for collection by the acquisition module; The acquisition module is used to complete the data acquisition of the position information provided by the gyroscope module and transmit the collected x, y, and z axis data to the data processing module; The data processing module receives the position signal of each phase and each axis uploaded by the acquisition module, records the position change when the isolating switch is adjusted, determines the movement state of the isolating switch, and further determines the adjustment state of the isolating switch; The display module can display the three-dimensional information of the position of the gyroscope module at this time. When the data displayed by the three phases meet the requirements or the error is within an acceptable range, it proves that it is appropriate to adjust the position of the isolating switch at this time.

[0008] Positive effect: Since the present invention improves the adjustment form of the isolating switch, the device is equipped with an external wiring. When checking the synchronization of the three phases, the external wiring is connected to 2 and 3. If any phase is in contact first, the device can send an indication signal, thereby replacing manpower. It is suitable for use as an intelligent maintenance auxiliary device for isolating switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the schematic diagram of the three-phase accelerometer module of the positioning module; Figure 2 This is a schematic diagram of the working state of this embodiment; Figure 3 This is a structural block diagram of this embodiment; Figure 4 This is the circuit diagram of the isolating switch. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0011] 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.

[0012] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0013] In the description of the present invention, 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0015] In the present invention, all embodiments, implementations and features of the present invention can be combined with each other without contradiction or conflict. In the present invention, conventional equipment, devices, components, etc. can be purchased commercially or made according to the contents disclosed in the present invention. In the present invention, in order to highlight the key points of the present invention, some conventional operations and equipment, devices, components are omitted or only briefly described.

[0016] See also Figures 1 to 4 The intelligent maintenance auxiliary device for isolating switch includes an external module and a built-in module. The external module includes an external wiring and an isolating switch. The built-in module includes a positioning module, a collection module, a data processing module and a display module. The positioning module is used to monitor the position signal of the turning arm of the high-voltage disconnector. The positioning module includes a three-phase gyroscope module A, B, and C, a three-phase accelerometer module A, B, and C, and a magnetometer that provides direction information of the high-voltage disconnector relative to the earth's magnetic field; they are respectively installed on the corresponding turning arms of the high-voltage disconnector to measure the position of the turning arm in the x-axis, y-axis, and z-axis directions, and convert the position into a processable electrical signal for collection by the acquisition module.

[0017] Here, the coordinate axis is determined, and the horizontal direction is the x-axis; the direction perpendicular to the x-axis on the horizontal plane is the y-axis; and the vertical direction perpendicular to the horizontal plane is the z-axis. The linear acceleration along the x, y, and z-axis directions, as well as the angular velocity around the x, y, and z-axis are measured respectively. Based on the six measured parameters, the specific spatial position of the high-voltage disconnector at this time is obtained. The models of the three-phase gyroscope and three-phase accelerometer module are as follows Figure 1 shown.

[0018] Accelx, Accely, Accelz are the three-axis accelerations measured by the accelerometer. Gyrox, Gyroy, Gyroz are the three-axis angular velocities measured by the gyroscope. Use the Kalman filter to fuse the data of the accelerometer and the gyroscope.

[0019] F is the state transfer matrix, B is the input matrix, U is the input vector, and ω is the system process noise; At each time step, the angular velocity data from the gyroscope is used to predict the orientation of the device.

[0020]

[0021] Use accelerometer data to correct predictions

[0022] K is the Kalman gain and H is the observation matrix.

[0023] The acquisition module is used to complete the data acquisition of the position information provided by the gyroscope module and transmit the collected x, y, and z axis data to the data processing module.

[0024] The data processing module receives the position signal of each phase and each axis uploaded by the acquisition module, records the position change when adjusting the isolating switch, determines the movement state of the isolating switch, and further determines the adjustment state of the isolating switch.

[0025] The display module can display the three-dimensional information of the position of the gyroscope module at this time. When the data displayed by the three phases meet the requirements or the error is within an acceptable range, it proves that it is appropriate to adjust the position of the isolating switch at this time.

[0026] The external module includes external wiring. The device is equipped with external wiring. When checking the synchronization of three phases, connect the external wiring to 2 and 3. If any phase is touched first, the device can send out an indication signal, thereby replacing manpower.

[0027] The intelligent maintenance auxiliary device for the disconnector also includes a micro control mechanism: The SDA and SCL output wires of the sensor are connected to the B11 and B10 pins of the microcontroller respectively; Connect the wires output from the B8 and B9 pins of the microcontroller to the SCL and SDA pins of the OLED display respectively; The single chip microcomputer model is STM32F103C8T6; The OLED display is four pins.

[0028] Connect the wires output from the SDA and SCL pins of the sensor to the B11 and B10 pins of the microcontroller. When adjusting the high-voltage isolating switch, the angle or position of the arm will change. The sensor will sense these changes, convert the analog quantity into digital quantity in the form of A / D conversion, and pass the information to the microcontroller. Connect the wires output from the B8 and B9 pins of the microcontroller to the SCL and SDA pins of the OLED display. The microcontroller uses the Kalman filter to fuse the angle data and acceleration data obtained from the sensor to determine the position information of the isolating switch arm. The fused data is sent to the communication pin of the OLED display through the B8 and B9 pins of the microcontroller, and finally the three-dimensional position information after the Kalman filter fusion is displayed on the OLED display. Among them, the microcontroller model is STM32F103C8T6, and the OLED display is four-pin.

[0029] When the data displayed on the display screen of the device on the three-phase arm of the high-voltage disconnector meets the requirements, it means that the adjustment is qualified.

[0030] The working process of this embodiment: When adjusting the high-voltage disconnector, the built-in sensor of the device will obtain angle data and acceleration data, and pass these data to the microcontroller. The microcontroller will fuse the obtained data through Kalman filtering to obtain the specific position information of the high-voltage disconnector arm, and then output it to the OLED display screen through the microcontroller. The displayed value is used to check whether the adjustment result is qualified.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The intelligent maintenance auxiliary device for isolating switch is characterized by: It includes external modules and internal modules. The external modules include external wiring and isolating switches. The internal modules include positioning modules, acquisition modules, data processing modules and display modules. A positioning module is used to monitor the position signal of the turning arm of the high-voltage disconnector. The positioning module includes an A, B, C three-phase gyroscope module, an A, B, C three-phase accelerometer module, and a magnetometer that provides the direction information of the high-voltage disconnector relative to the earth's magnetic field; they are respectively installed on the corresponding turning arms of the high-voltage disconnector to measure the position of the turning arm in the x-axis, y-axis and z-axis directions, and convert the position into a processable electrical signal for collection by the acquisition module; The acquisition module is used to complete the data acquisition of the position information provided by the gyroscope module and transmit the collected x, y, and z axis data to the data processing module; The data processing module receives the position signal of each phase and each axis uploaded by the acquisition module, records the position change when the isolating switch is adjusted, determines the movement state of the isolating switch, and further determines the adjustment state of the isolating switch; The display module can display the three-dimensional information of the position of the gyroscope module at this time. When the data displayed by the three phases meet the requirements or the error is within an acceptable range, it proves that it is appropriate to adjust the position of the isolating switch at this time.

2. The intelligent maintenance auxiliary device for disconnecting switches according to claim 1 is characterized in that: The external module includes an external wiring. When checking the synchronization of the three phases, the external wiring is connected to 2 and 3. If any phase is touched first, the device can send out an indication signal, thereby replacing manpower.

3. The intelligent maintenance auxiliary device for disconnecting switches according to claim 1 is characterized in that: The disconnector intelligent maintenance auxiliary device also includes a micro control mechanism: The SDA and SCL output wires of the sensor are connected to the B11 and B10 pins of the microcontroller respectively; Connect the wires output from the B8 and B9 pins of the microcontroller to the SCL and SDA pins of the OLED display respectively; The single chip microcomputer model is STM32F103C8T6; The OLED display is four pins.

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