Online monitoring device for mechanical characteristics of high-voltage switch

Abstract

The utility model discloses an on-line monitoring device for mechanical characteristics of a high-voltage switch. The on-line monitoring device comprises a main MCU (Microprogrammed Control Unit) processing module, a display unit, an RS485 communication module, an Ethernet communication module, a signal processing unit and a signal acquisition sensor group, the signal acquisition sensor group comprises a Hall current sensor, a pressure sensor, a displacement sensor, an acceleration sensor and a voltage sensor, the signal processing unit receives signals of the signal acquisition sensor group, sends the signals to the main MCU processing module, communicates with a background through the RS485 communication module and the Ethernet communication module, and displays data through the display unit. The high-voltage circuit breaker performance monitoring system is an on-line monitoring device, monitors the performance of a high-voltage circuit breaker in real time, comprehensively evaluates the performance of the circuit breaker, monitors parameters of the circuit breaker, calculates related performance parameters in real time according to data collected by a sensor, and comprehensively evaluates the high-voltage circuit breaker.

Description

Technical Field

[0001] The utility model relates to a high-voltage circuit breaker, in particular to an online monitoring device for mechanical characteristics of a high-voltage switch. Background Art

[0002] High-voltage circuit breakers, also known as high-voltage switches, can break both normal loads and loads with short circuits and ground faults. The mechanical performance parameters of high-voltage circuit breakers mainly include: opening and closing time, opening and closing synchronism, opening distance, overtravel, opening and closing speed, draw speed and maximum speed. According to relevant statistics, failures of high-voltage circuit breakers caused by mechanical performance degradation account for 70% of all failures. The mechanical performance of circuit breakers directly affects the reliability of the entire power grid operation.

[0003] At present, the detection of mechanical characteristics of circuit breakers in the market is mainly carried out through on-site mechanical characteristics tests. This method is an offline detection method with problems such as low efficiency and data delay, and cannot give relevant warnings before a fault occurs. Therefore, a device that can monitor online is needed to monitor the characteristic parameters such as the opening and closing time and the synchronicity of the high-voltage circuit breaker in real time, make real-time judgments on the status of the high-voltage circuit breaker based on the data, and give warning prompts before a fault occurs.

[0004] At present, the solutions for monitoring the mechanical characteristics of high-voltage circuit breakers in the market are usually divided into two categories: online monitoring and offline detection. Offline monitoring has low efficiency and large data delay, and cannot give prompt fault warnings in time, so it is suitable for regular maintenance. Many online monitoring solutions have relatively simple functions. Some solutions only monitor and analyze the mechanical characteristics of the circuit breaker, such as mechanical opening and closing time, opening and closing synchronization, opening distance, overtravel, and opening and closing speed; some solutions detect and analyze the current parameters of closing current, opening current and main circuit current. Both of these solutions have the disadvantages of being relatively simple in function and cannot fully reflect the mechanical characteristics of high-voltage circuit breakers. Utility Model Content

[0005] In order to solve the defects of the above-mentioned prior art, the utility model provides an online monitoring device for the mechanical characteristics of a high-voltage switch. The utility model is an online monitoring device, which monitors the performance of a high-voltage circuit breaker in real time. In order to comprehensively evaluate the performance of the circuit breaker, the pressure sensor, displacement sensor, acceleration sensor, current sensor, voltage sensor and other sensors are used to monitor the parameters such as the opening and closing time, opening and closing synchronization, opening distance, overtravel, opening and closing speed, opening and closing current, main circuit current and opening and closing voltage of the circuit breaker. The relevant performance parameters are calculated in real time according to the data collected by the sensor, so as to realize a comprehensive evaluation of the high-voltage circuit breaker.

[0006] To achieve the above technical objectives, the utility model adopts the following technical solutions: an online monitoring device for the mechanical characteristics of a high-voltage switch, comprising a main MCU processing module, a display unit, an RS485 communication module, an Ethernet communication module, a signal processing unit, and a signal acquisition sensor group, wherein the display unit, the RS485 communication module, the Ethernet communication module, and the signal processing unit are all connected to the main MCU processing module; the signal acquisition sensor group comprises a Hall current sensor, a pressure sensor, a displacement sensor, an acceleration sensor, and a voltage sensor, wherein the Hall current sensor, the pressure sensor, the displacement sensor, the acceleration sensor, and the voltage sensor are all connected to the signal processing unit, wherein the signal processing unit receives the signal of the signal acquisition sensor group and sends it to the main MCU processing module, communicates with the background through the RS485 communication module and the Ethernet communication module, and displays data through the display unit.

[0007] Furthermore, it also includes a power supply module, which supplies power to the system. The input of the power supply module is AC / DC 85-265V wide voltage input range, and the output is three-way low-voltage output.

[0008] Furthermore, the power module adopts an isolated switching power supply, and the primary and secondary isolation voltages are not less than AC 2500V.

[0009] Furthermore, the display unit has a built-in SD storage card for storing data and interacting with the main MCU processing module data.

[0010] In summary, the utility model has achieved the following technical effects:

[0011] The utility model is an online monitoring device, which monitors the performance of high-voltage circuit breakers in real time. In order to comprehensively evaluate the performance of circuit breakers, the utility model monitors the parameters of the circuit breaker such as the opening and closing time, opening and closing synchronization, opening distance, overtravel, opening and closing speed, opening and closing current, main circuit current and opening and closing voltage through sensors such as pressure sensors, displacement sensors, acceleration sensors, current sensors and voltage sensors. The utility model calculates the relevant performance parameters in real time according to the data collected by the sensors, so as to realize a comprehensive evaluation of the high-voltage circuit breaker.

[0012] In addition to parameter measurement, the utility model also has an on-site display screen, which can intuitively display the circuit breaker opening and closing status, opening and closing current curves, formation curves, acceleration curves and other real-time curves on the display screen. The alarm parameters can be set through the display screen, and when an alarm occurs, it can be directly displayed in real time on the display screen. In addition to the display screen, the utility model also has an SD card. The SD card is used to store the real-time measured opening and closing time, spring pressure, stroke, opening and closing current and various alarm data. It also has a communication function. The communication interface includes an RS485 interface and an Ethernet interface. Both communication interfaces can interact with the background system for data, and transmit the real-time data of the monitored high-voltage circuit breaker to the background system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of an online monitoring device for mechanical characteristics of a high-voltage switch provided by an embodiment of the utility model;

[0014] Figure 2 It is the circuit schematic diagram of the power module;

[0015] Figure 3 This is the circuit schematic diagram of the RS485 communication module;

[0016] Figure 4 It is the circuit schematic diagram of Ethernet communication module. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Example:

[0024] like Figure 1 As shown, an online monitoring device for mechanical characteristics of a high-voltage switch is characterized in that it includes a main MCU processing module 2, a display unit 3, an RS485 communication module 4, an Ethernet communication module 5, a signal processing unit 6, and a signal acquisition sensor group 7, wherein the display unit 3, the RS485 communication module 4, the Ethernet communication module 5, and the signal processing unit 6 are all connected to the main MCU processing module 2; the signal acquisition sensor group 7 includes a Hall current sensor, a pressure sensor, a displacement sensor, an acceleration sensor, and a voltage sensor, and the Hall current sensor, the pressure sensor, the displacement sensor, the acceleration sensor, and the voltage sensor are all connected to the signal processing unit 6, wherein the signal processing unit 6 receives the signal of the signal acquisition sensor group 7 and sends it to the main MCU processing module 2, communicates with the background through the RS485 communication module 4 and the Ethernet communication module 5, and displays data through the display unit 3.

[0025] like Figure 2 As shown, it also includes a power module 1, which supplies power to the system. The input of the power module 1 is AC / DC 85-265V wide voltage input range, and the output is three-way low-voltage output. The power module 1 adopts an isolated switching power supply, and the primary and secondary isolation voltages are not less than AC 2500V. In addition to AC to DC power conversion, the power module also has an EMC protection circuit, including a surge protection circuit and a common mode interference protection circuit. In order to improve the applicability of the power circuit and prevent the power module from being damaged by overvoltage due to higher voltage input at the site of use, the power supply is designed with sufficient power margin in the circuit, and the actual design index can reach the upper limit of AC 380V without damage. The circuit composed of C67, C71, D18, D21-D24, R79 and Q5 realizes the function of the power supply circuit being able to adapt to higher voltages. Resistor R85 absorbs overvoltage, inductor L4, inductor L6, capacitor C68, and capacitor C64 make the voltage stable and smooth, diode D14 rectifies the voltage, diodes D15 and D19 absorb spikes, Q5 controls the chip switch, C72 chip bypass capacitor mode selection, C93 improves the isolation voltage absorption capability, D16, D17, and D20 prevent reverse output, U10 is a voltage regulator chip, R87 and R81 are voltage feedback resistors, C60, C61, C62, C63, C65, C66, L2, and L5 store energy to stabilize and smooth the voltage and supply power to VCC and GND.

[0026] The main MCU processing module 2 is the core unit of the entire device, and multiple functions such as data calculation processing, alarm processing, display interaction, and communication data interaction are implemented in this unit.

[0027] The display unit 3 has a built-in SD storage card for storing data and interacting with the main MCU processing module 2. The display unit is a core unit for human-computer interaction, which displays the data processed by the main MCU processing module 2 in a data format that can be received by the customer, and can translate the data set by the customer into data that can be recognized by the main MCU processing module 2 and transmit it to the unit.

[0028] like Figure 3 As shown, the RS485 communication module is responsible for data exchange with the background system. The physical layer used is the RS485 electrical interface. The communication protocol can be determined according to the actual situation of the customer background. The M1 module is a 485 functional module. This module converts the signal level of the MCU into the RS485 bus level, and converts the signal received on the RS485 bus into a signal level that the MCU can recognize. D9-D11 is an interface protection circuit.

[0029] The signal processing unit 6 is the core of the data processing unit.

[0030] The physical quantity signals collected by the signal acquisition sensor group 7 are converted into voltage signals after being collected by this unit. The voltage signals are transmitted to the signal processing unit 6 for further signal filtering, amplification and digital processing. The processed signals are input to the main MCU processing module 2.

[0031] The utility model is an online monitoring device, which is more practical and timely than offline devices. It is equipped with sensors such as pressure sensors, displacement sensors, acceleration sensors, current sensors and voltage sensors to monitor parameters such as the circuit breaker opening and closing voltage. The relevant performance parameters are calculated in real time based on the data collected by the sensors, and the opening and closing time, opening and closing synchronization, opening distance, overtravel, opening and closing speed, opening and closing current, main circuit current and high-voltage circuit breaker are fully evaluated. It has more complete functions than general solutions. It has a variety of communication interface options, which is more suitable for customers than general solutions. Different interfaces can be connected according to different needs of the customer's background. It also has data storage, alarm display and SD card data storage functions, which better meet the needs of customers on-site use. The power supply part has also been further improved, which has improved the high idle voltage access, making it more reliable than general designs.

[0032] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. An online monitoring device for mechanical characteristics of a high-voltage switch, characterized in that: The invention comprises a main MCU processing module (2), a display unit (3), an RS485 communication module (4), an Ethernet communication module (5), a signal processing unit (6), and a signal acquisition sensor group (7), wherein the display unit (3), the RS485 communication module (4), the Ethernet communication module (5), and the signal processing unit (6) are all connected to the main MCU processing module (2); the signal acquisition sensor group (7) comprises a Hall current sensor, a pressure sensor, a displacement sensor, an acceleration sensor, and a voltage sensor, wherein the Hall current sensor, the pressure sensor, the displacement sensor, the acceleration sensor, and the voltage sensor are all connected to the signal processing unit (6), wherein the signal processing unit (6) receives the signal of the signal acquisition sensor group (7) and sends it to the main MCU processing module (2), communicates with the background through the RS485 communication module (4) and the Ethernet communication module (5), and displays data through the display unit (3).

2. The device for online monitoring mechanical characteristics of a high-voltage switch according to claim 1, characterized in that: It also comprises a power supply module (1), the power supply module (1) supplies power to the system, the input of the power supply module (1) is an AC / DC 85-265V wide voltage input range, and the output is three-way low-voltage output.

3. The device for online monitoring mechanical characteristics of a high-voltage switch according to claim 2, characterized in that: The power module (1) adopts an isolated switching power supply, and the primary and secondary isolation voltages are not less than AC 2500V.

4. The device for online monitoring mechanical characteristics of a high-voltage switch according to claim 1, characterized in that: The display unit (3) has a built-in SD storage card for storing data and interacting with the main MCU processing module (2).

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