Switch cabinet on-line monitoring comprehensive analysis system

Abstract

The invention relates to the technical field of high-voltage switch cabinets, and particularly discloses a switch cabinet on-line monitoring comprehensive analysis system, which is characterized in that a contact sensor integrates a temperature sensor, a clamping force sensor, an insertion depth sensor, misalignment and on-line electricity taking, and temperature, clamping force and insertion depth data of a switch cabinet contact are sent to a data acquisition unit in real time; the data collector wirelessly receives the data of the contact sensor and uploads the data to the monitoring host; the contact sensor and the data collector are in wireless communication for data transmission; and the monitoring host receives the data sent by each data acquisition unit through an RS485 mode, and has the functions of alarm, analysis and display, event query, data remote transmission and the like. According to the invention, the conditions of single data and unclear analysis caused by only depending on temperature measurement are broken through. Overall analysis and judgment can be carried out on the condition of the switch in multiple directions, and safety prevention and work guidance can be made in a more scientific and technical and based mode.

Description

Technical Field

[0001] The present invention relates to the technical field of high - voltage switch cabinets, and specifically to an online monitoring and comprehensive analysis system for switch cabinets. Background Art

[0002] High - voltage circuit breakers are important switching devices in power equipment, playing a role in control and protection, and are one of the important factors determining whether the power system can supply power safely. After long - term operation of the circuit breaker, the performance of related transmission parts, elastic elements, and electrical parts is prone to deterioration, which easily leads to a decline in the reliability of the circuit breaker and various defects, affecting the safe and stable operation of the power grid.

[0003] By analyzing the causes of accidents such as overheating of contacts and burning of switch cabinets in high - voltage switch cabinets, the following main points exist:

[0004] 1. The tension of the fastening spring on the outer side of the contact is insufficient, and the spring is loose.

[0005] 2. The connection between the contact and the conductive arm is too loose.

[0006] 3. The static contact and the moving contact of the switch cabinet are in poor contact.

[0007] 4. The insertion depth of the moving and static contacts is insufficient.

[0008] 5. When the moving and static contacts are inserted, they are not centered, resulting in spring deformation and uneven force.

[0009] 6. The switch cabinet has been in operation for a long time, resulting in spring fatigue.

[0010] The above reasons will lead to overheating of the contacts and ultimately cause the contacts to burn out, resulting in accidents, and simply using a single form of temperature measurement cannot fully discover the true cause of the switch fault point.

[0011] Based on this, the present invention provides a comprehensive analysis system that can simultaneously monitor the contact temperature, contact insertion depth, and contact clamping force online. Summary of the Invention

[0012] The purpose of the present invention is to provide an online monitoring and comprehensive analysis system for switch cabinets to solve the problems raised in the above - mentioned background art.

[0013] To achieve the above - mentioned purpose, the present invention provides the following technical solutions:

[0014] An online monitoring and comprehensive analysis system for switch cabinets, the system includes:

[0015] A contact sensor, which integrates a temperature sensor, a clamping force sensor, an insertion depth sensor, misalignment, and online power supply, uses wireless communication technology for data transmission, and real - time sends data on temperature, clamping force, and insertion depth of the switch cabinet contact to a data collector;

[0016] A data collector that wirelessly receives the data of the contact sensor and uploads it to the monitoring host; wireless communication is used for data transmission between the contact sensor and the data collector.

[0017] A monitoring host that receives the data sent by each data collector via the RS485 method, receives and displays the data sent by each data collector in real time, and has functions such as alarm function, analysis and display function, event query, and data remote transmission.

[0018] As a further technical solution of the present invention, in the contact sensor, the temperature monitoring range is -20 - 125 °C, and the accuracy is ±2 °C; the insertion depth measurement range is 10 - 30 mm, and the accuracy is ±1 mm; the clamping force measurement range is 0 - 300 N, and the accuracy is ±1 N; the misalignment measurement range is 0 - 7 °, and the accuracy is ±0.2 °.

[0019] As a further technical solution of the present invention, in step S3, the transmission distance of the data collector is 30 meters, and each data collector receives the data of 720 sensors.

[0020] As a further technical solution of the present invention, the host channels of the monitoring host are 720 points (120 switch cabinets); its display method is touch screen display; the operating system is WINDOWS, and the transmission method is the RS485 communication protocol Modbus.

[0021] As a further technical solution of the present invention, the system has a recording function, and the recording function includes:

[0022] Providing an amplitude and change trend chart, which can display the trend chart within a preset time period at a set time interval;

[0023] Recording basic characteristic parameters such as amplitude and average value at a frequency not lower than 1 time / 5 minutes (which can be set by the user);

[0024] Having a data storage function, storing at least the parameter information of the most recent 1 year, and being able to export historical data through an external interface.

[0025] As a further technical solution of the present invention, the system has an alarm function, and the alarm function includes:

[0026] Having an automatic alarm function for abnormal situations such as abnormal monitoring results, monitoring function failures, and communication interruptions;

[0027] The alarm strategy can comprehensively apply various early warning methods such as threshold alarm, associated alarm, and trend alarm, and provide high change rate alarm and large inter-phase data alarm (the alarm value can be set by the user);

[0028] The alarm information can clearly distinguish different types of abnormal situations such as abnormal monitoring data and abnormal device self-checking.

[0029] The alarm information is transmitted remotely in real time, and the alarm strategy settings can be modified.

[0030] As a further technical solution of the present invention, the system has an analysis and display function, and the analysis and display function includes:

[0031] Real-time display of the contact temperature, contact clamping force and insertion depth values of each monitoring point;

[0032] Automatically collect the data of the high-voltage switchgear in the high-voltage chamber, provide historical curves, and be able to give solutions and treatment measures in case of abnormalities.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a comprehensive analysis system that can simultaneously monitor the contact temperature, contact insertion depth and contact clamping force online. Through the real-time monitoring of the above three parameters, an artificial neural network analysis model is established by using artificial intelligence algorithms through a large number of data records, so as to realize the judgment of the state trend of high-voltage switches, breaking the situation of single data caused by relying solely on temperature measurement and unclear analysis. It can comprehensively analyze and judge the situation of the switch from multiple aspects, and make safety prevention and work guidance more scientifically and based on evidence. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0035] Figure 1 It is the structure diagram of the online monitoring comprehensive analysis system for switchgear in the embodiment of the present invention.

[0036] Figure 2 It is the home page diagram of the embodiment of the present invention.

[0037] Figure 3 It is the historical query diagram in the embodiment of the present invention.

[0038] Figure 4 It is the data curve diagram in the embodiment of the present invention. Detailed Embodiments

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] The system of the present invention integrates a temperature sensor, a clamping force sensor, an insertion depth sensor, and on-line power taking, and uses advanced wireless communication technology for data transmission to perform real-time on-line monitoring of the temperature, clamping force, and insertion depth of the switch cabinet contacts. The system has functions such as visual image interface, threshold alarm, curve analysis, query statistics, report management, etc., and can operate locally at the station or be integrated into a network for operation. The contact sensor is installed on the surface of the plum blossom contact, and the data is transmitted to the monitoring host by wireless transmission. The monitoring host completes functions such as local data display and alarm at the station end. At the same time, the monitoring host uploads the on-site data to the background management master station by wireless communication, and cooperates with the dedicated background management software to complete the reception, storage, analysis, and related applications of the on-site data, and performs "centralized monitoring" on parameters such as the temperature, clamping force, and insertion depth of each contact.

[0041] Please refer to Figure 1 , the embodiment of the present invention provides an on-line monitoring and comprehensive analysis system for switch cabinets, and the system includes:

[0042] A contact sensor that integrates a temperature sensor, a clamping force sensor, an insertion depth sensor, misalignment, and on-line power taking, and uses advanced wireless communication technology for data transmission to send the temperature, clamping force, and insertion depth data of the switch cabinet contacts to the data collector in real time;

[0043] A data collector that wirelessly receives the data of the contact sensor and uploads it to the monitoring host, or directly uploads it to the general background through RS485 / network cable / fiber optic / GPRS, etc.; wireless communication is used for data transmission between the contact sensor and the data collector;

[0044] A monitoring host that receives the data sent by each data collector through the RS485 method, and receives and displays the data sent by each data collector in real time, and has functions such as alarm function, analysis and display function, event query, and data remote transmission;

[0045] It also includes a background PC, which is used to receive the data uploaded by each monitoring host in real time, cooperate with the dedicated management software of the on-line monitoring and comprehensive analysis system for switch cabinets, and perform display, storage, analysis, etc., to provide users with various practical management functions.

[0046] In the contact sensor of this embodiment, the temperature monitoring range is: -20 - 125 °C, and the accuracy is: ±2 °C; the insertion depth measurement range is: 10 - 30 mm, and the accuracy is: ±1 mm; the clamping force measurement range is: 0 - 300 N, and the accuracy is: ±1 N; the misalignment measurement range is: 0 - 7 °, and the accuracy is: ±0.2 °.

[0047] In step S3 of this embodiment, the transmission distance of the data collector is 30 meters, and each data collector receives the data of 720 sensors.

[0048] The host channel of the monitoring host in this embodiment has 720 points (120 switch cabinets on the panel); its display mode is touch screen display; the operating system is WINDOWS, and the transmission mode is RS485 communication protocol Modbus.

[0049] The background PC in this embodiment supports asynchronous serial ports.

[0050] The system in this embodiment has a monitoring function, which can continuously and automatically monitor and record the contact temperature, contact clamping force, insertion depth value, and misalignment of the switch cabinet.

[0051] The system in this embodiment has a recording function, which includes:

[0052] Providing amplitude and change trend charts, which can display trend charts within a preset period according to the set time interval;

[0053] Recording basic characteristic parameters such as amplitude and average value at a frequency not less than 1 time / 5 minutes (which can be set by the user);

[0054] Having a data storage function, storing at least the parameter information of the past year, and being able to export historical data through an external interface.

[0055] The system in this embodiment has an alarm function, which includes:

[0056] Having an automatic alarm function for abnormal situations such as abnormal monitoring results, monitoring function failures, and communication interruptions;

[0057] The alarm strategy can comprehensively apply various early warning methods such as threshold alarm, associated alarm, and trend alarm, and provide high change rate alarms and large inter-phase data alarms (the alarm values can be set by the user);

[0058] The alarm information can clearly distinguish different types of abnormal situations such as abnormal monitoring data and abnormal device self-check;

[0059] The alarm information is transmitted remotely in real time, and the alarm strategy settings can be modified.

[0060] The system in this embodiment has an analysis and display function, which includes:

[0061] Real-time display of the contact temperature, contact clamping force, and insertion depth value of each monitoring point;

[0062] Automatically collecting data of the switch cabinets in the high-voltage room, providing historical curves, and being able to give solutions and handling measures in case of abnormalities.

[0063] The system of this embodiment has an anti-interference function and is capable of effectively suppressing and eliminating background interference in a complex on-site electromagnetic environment, ensuring the effectiveness of monitoring.

[0064] The system of this embodiment has a self-detection and self-recovery function. It has a self-detection function that provides regular self-check information on the operating status of the device, records fault logs, and the detection period can be set. It has a self-recovery function. When situations such as abnormal power supply termination occur, the device can automatically resume normal operation without data loss in the storage.

[0065] Please refer to Figures 2 to 4 , the brief introduction of the on-line monitoring and comprehensive analysis system of switchgear of the present invention in actual application is as follows:

[0066] Home page and exit: After entering the system, as Figure 2 shown, the default is [Home Page]. On the left are menu options, and on the right, the data changes of the added devices are displayed in real time. There are 8 display units corresponding to 8 cabinets. Above each display unit, the device number and device name are displayed. Press the [Exit] key on the display interface to close the system.

[0067] Historical query: Press the [Historical Query] key on the display interface, as Figure 3 shown in the interface. Press the [Previous Page] and [Next Page] keys below the data table to view historical records up and down; press [Delete] to delete the selected historical record; press the drop-down menus after "Start Time" and "End Time" above the data table to filter and view the dates of historical data; press the number after "Device Number" to filter the data of the device to be viewed.

[0068] Data curve: Press the [Data Curve] key, as Figure 4 shown in the interface. By default, the dynamic changes of the data are displayed in real time. Press [Historical Curve] to view the fluctuations of historical data; the current data type is displayed behind "Category". Click on the blank area behind "Temperature" to select "Pressure" and "Depth" data curves; [A Up], [A Down], [B Up], [B Down], [C Up], [C Down] below "Display Item" respectively correspond to six contacts on the switchgear. Select to view the data curves of the corresponding contacts; the time range and device number to be viewed can be set, and the specific operation is the same as [Historical Query].

[0069] It should be noted that in this text, the term "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or system including that element.

[0070] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. The switch cabinet online monitoring and comprehensive analysis system is characterized by: The system comprises: The contact sensor integrates the temperature sensor, clamping force sensor, insertion depth sensor, misalignment, and online power supply, uses wireless communication technology for data transmission, and sends the temperature, clamping force, and insertion depth data of the switch cabinet contacts to the data collector in real time; The data collector wirelessly receives the data from the contact sensor and uploads it to the monitoring host; the contact sensor and the data collector are wirelessly transmitted for data transmission; The monitoring host receives the data sent by each data collector through RS485, receives and displays the data sent by each data collector in real time, and has functions such as alarm, analysis and display, event query and data remote transmission.

2. The switch cabinet online monitoring and comprehensive analysis system according to claim 1 is characterized in that: In the contact sensor, the temperature monitoring range is: -20-125℃, accuracy: ±2℃; the insertion depth measurement range is: 10-30mm, accuracy: ±1mm; the clamping force measurement range is: 0-300N, accuracy: ±1N; the misalignment measurement range is: 0-7°, accuracy: ±0.2°.

3. The switch cabinet online monitoring and comprehensive analysis system according to claim 1 is characterized in that: In step S3, the data collector has a transmission distance of 30 meters, and each data collector receives data from 720 sensors.

4. The switch cabinet online monitoring and comprehensive analysis system according to claim 1 is characterized in that: The host channel of the monitoring host is 720 points; its display mode is touch screen display; and its operating system is WINDOWS.

5. The switch cabinet online monitoring and comprehensive analysis system according to claim 1 is characterized in that: The system has a recording function, which includes: Provide trend graphs of amplitude and change, and display trend graphs within a preset period of time at set time intervals; Record basic characteristic parameters at a frequency of not less than once every 5 minutes; It has data storage function, can store at least the parameter information of the latest year, and can export historical data through external interface.

6. The switch cabinet online monitoring and comprehensive analysis system according to claim 1 is characterized in that: The system has an alarm function, which includes: With automatic alarm function for abnormal situations; The alarm strategy can comprehensively apply a variety of early warning methods to provide high change rate alarms and large phase-to-phase data alarms; Alarm information clearly distinguishes different types of abnormal situations; Alarm information is transmitted remotely in real time, and alarm strategy settings can be modified.

7. The switch cabinet online monitoring and comprehensive analysis system according to claim 1 is characterized in that: The system has an analysis and display function, which includes: Real-time display of contact temperature, contact clamping force and insertion depth values ​​at each monitoring point; Automatically collect data from the high-voltage room switch cabinet, provide historical curves, and give solutions to abnormalities.

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