Partial discharge insulation and temperature measurement integrated detection equipment

Abstract

The utility model relates to partial discharge insulation and temperature measurement integrated detection equipment. Comprising a detection host used for completing data processing, a temperature sensor used for monitoring cable temperature change in real time, an insulation sensor used for detecting leakage current of each phase line, and a partial discharge sensor used for receiving ultrahigh frequency electromagnetic wave signals generated by partial discharge in the switch cabinet. According to the utility model, through cooperative work of all parts, comprehensive, real-time and accurate detection and analysis of the power supply operation condition of the switch cabinet are realized, the practical value and economic benefit are remarkable, and stable operation of an electric power system can be effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment detection, in particular to a partial discharge insulation temperature integrated detection equipment. BACKGROUND

[0002] In the power system, the switch cabinet as an important electrical equipment, its stable operation is of great importance to guarantee the reliability of power supply. However, the switch cabinet in the long-term operation process, due to electrical, thermal, mechanical and other factors, may appear partial discharge, insulation performance decline and temperature anomaly and other problems. These problems if not found and handled in time, may cause serious electrical accident, lead to power failure, bring great loss to production and life.

[0003] At present, for the detection of switch cabinet, usually adopt multiple independent detection equipment respectively to detect partial discharge, insulation performance and temperature. For example, using a separate partial discharge detector to detect partial discharge, through the insulation resistance tester to detect insulation performance, using temperature sensor to measure temperature. This detection method has many disadvantages: on the one hand, the use of multiple devices increases the detection cost and the complexity of equipment management; on the other hand, due to the independent work of each detection device, the running state of the switch cabinet cannot be analyzed in real time, and it is difficult to accurately judge the potential fault hidden danger in time. For example, partial discharge may lead to insulation performance decline and cause temperature rise, but independent detection equipment cannot quickly capture the correlation between these parameters, delay the fault judgment and processing opportunity.

[0004] Therefore, it is urgent to develop a partial discharge insulation temperature integrated detection equipment which can integrate partial discharge detection, insulation monitoring and temperature measurement, and can analyze data in real time. CONTENT OF THE INVENTION

[0005] The utility model mainly aims at the above -mentioned problem existing in prior art, provides a partial discharge insulation temperature integrated detection equipment.

[0006] The purpose of the utility model is mainly realized by the following scheme:

[0007] The partial discharge insulation temperature integrated detection equipment is used for detecting the power supply operation condition in the switch cabinet, comprising:

[0008] The detection host is used for completing data processing, comprising a shell installed on the outside of the switch cabinet, and a display module, a key module, an alarm module, a data processing unit and a communication module integrated on the shell;

[0009] The temperature sensor is a passive wireless temperature sensor, which is respectively bundled to the three phase wires of the indoor cable of the switch cabinet. It is used to monitor the temperature change of the cable in real time, convert the temperature signal into an electrical signal, and transmit it to the data processing unit.

[0010] An insulation sensor, which is a micro-current sensor, is installed on the three phase wires of the indoor cable of the switch cabinet to detect the leakage current of each phase wire and transmit the detected abnormal signal to the data processing unit.

[0011] A partial discharge sensor is magnetically attached to the inner wall of the switch cabinet to receive ultra-high frequency electromagnetic wave signals generated by partial discharge inside the switch cabinet, convert them into electrical signals, and transmit them to the data processing unit.

[0012] Preferably, the housing is mounted on a guide rail, and the front side of the guide rail is provided with a horizontally arranged mounting groove. The upper and lower inner walls of the mounting groove are provided with sliding grooves. The upper and lower sides of the back of the housing are rotatably connected with limiting wheels that protrude from the upper and lower surfaces of the housing. The back of the limiting wheels is flush with the back of the housing, and the limiting wheels are rotatably connected in the sliding grooves.

[0013] Preferably, the mounting groove is provided with a plurality of heat dissipation holes evenly distributed, and the upper and lower parts of the guide rail are provided with fixing holes.

[0014] Preferably, the testing equipment also includes a background testing system, which is connected to the testing host via an RS485 interface, a communication cable, and the Modbus communication protocol.

[0015] Preferably, the data processing unit employs a microprocessor, which integrates a signal acquisition module, a data storage module, a data analysis module, and a communication control module. The signal acquisition module is responsible for acquiring data sent by the temperature sensor, partial discharge sensor, and insulation sensor. The data storage module is used to store the acquired historical data. The data analysis module performs real-time analysis on the acquired data, determines the operating status of the electrical equipment, and generates corresponding alarm information based on the analysis results. The communication control module controls the communication module to interact with the temperature sensor.

[0016] Preferably, the temperature sensor uses wireless passive sensing technology and adopts the ZigBee wireless transmission protocol. The communication module and the temperature sensor share the same wireless frequency band, which is 433MHz.

[0017] Preferably, the display module is an LCD screen, used to display in real time the cable temperature monitored by the temperature sensor, the leakage current value detected by the insulation sensor, and the intensity of the partial discharge ultra-high frequency electromagnetic wave signal received by the partial discharge sensor, while also displaying the operation status analysis results generated by the data analysis module.

[0018] Preferably, the alarm module uses an audible and visual alarm and is connected to the data analysis module. When the data analysis module determines that there is an abnormality in the power supply operation, the alarm module issues an alarm signal.

[0019] Preferably, the button module includes a function selection button and a parameter setting button. The function selection button switches the display module to show different detection data and analysis results, and the parameter setting button adjusts the preset threshold range parameters in the data processing unit.

[0020] Preferably, the partial discharge sensor is an ultra-high frequency detection sensor, employing a three-in-one partial discharge sensing technology combining UHF, TEV, and HFCT.

[0021] In summary, compared with the prior art, the present invention has the following beneficial technical effects:

[0022] (1) This utility model integrates partial discharge detection, insulation performance monitoring and temperature measurement functions into one, which reduces the number of detection devices, reduces detection costs and the complexity of equipment management. At the same time, multi-parameter synchronous detection can comprehensively analyze the operating status of the switch cabinet in real time and more accurately judge potential fault hazards.

[0023] (2) In this utility model, the housing of the detection host is installed by the limit wheel and the sliding groove on the guide rail, which is convenient for installation and disassembly, and facilitates the maintenance and replacement of the equipment. The heat dissipation holes on the mounting groove help the detection host to dissipate heat, ensuring that the equipment works in a stable temperature environment, improving the reliability and service life of the equipment. The fixing holes on the guide rail make it easy to install the guide rail firmly on the switch cabinet, ensuring that the position of the detection host is fixed.

[0024] (3) The data processing unit in this utility model adopts a microprocessor and integrates multiple functional modules. It can efficiently collect, store and analyze data. It is connected to the background detection system through RS485 interface, communication cable and Modbus communication protocol, which can realize remote data transmission and centralized management. It is convenient for maintenance personnel to remotely monitor the operating status of the switch cabinet. The temperature sensor adopts wireless passive sensing technology and ZigBee wireless transmission protocol. It uses the same 433MHz wireless frequency band as the communication module, which ensures the stability and efficiency of data transmission. It does not require additional power supply, which reduces the complexity and cost of the equipment.

[0025] (4) In this utility model, the LCD screen serves as the display module, which can intuitively display various detection data and operation status analysis results in real time, making it convenient for maintenance personnel to quickly understand the operation status of the switch cabinet. The function selection button and parameter setting button of the button module enable maintenance personnel to easily switch the display content and adjust the preset threshold parameters of the data processing unit to adapt to different detection needs and switch cabinet operation status.

[0026] (5) The partial discharge sensor in this utility model adopts an ultra-high frequency detection sensor and integrates UHF, TEV and HFCT three-in-one partial discharge sensing technology, which can more accurately detect the partial discharge signal inside the switch cabinet, improve the sensitivity and reliability of partial discharge detection, and effectively avoid the occurrence of missed detection and false detection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the detection host in this utility model;

[0028] Figure 2 This is a side view of the detection host in this utility model;

[0029] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a schematic diagram of the installation of the detection host and the guide rail in this utility model;

[0031] Figure 5 This is a schematic diagram showing the connection between the monitoring host and multiple switch cabinet cable compartments in this utility model.

[0032] Reference numerals: 1-Housing, 2-Display module, 3-Button module, 4-Alarm module, 5-Guide rail, 6-Mounting slot, 7-Slide groove, 8-Limit wheel, 9-Heat dissipation hole, 10-Fixing hole. Detailed Implementation

[0033] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model. Example

[0034] like Figure 1 , 5 As shown, this utility model discloses a technical solution: an integrated partial discharge insulation temperature measurement and detection device for detecting the power supply operation status inside a switch cabinet, comprising: a detection host, a temperature sensor, an insulation sensor, and a partial discharge sensor.

[0035] The detection host is used to process data, including a housing 1 installed on the outside of the switch cabinet, and a display module 2, a button module 3, an alarm module 4, a data processing unit, and a communication module integrated on the housing 1.

[0036] The temperature sensor is a passive wireless temperature sensor, which is bundled to the three phase wires of the indoor cable of the switch cabinet. It is used to monitor the temperature change of the cable in real time, convert the temperature signal into an electrical signal, and transmit it to the data processing unit.

[0037] The insulation sensor uses a micro-current sensor, which is installed on the three phase wires of the cable in the switch cabinet cable room to detect the leakage current of each phase wire and transmit the detected abnormal signal to the data processing unit.

[0038] The partial discharge sensor is magnetically attached to the inner wall of the switch cabinet to receive ultra-high frequency electromagnetic wave signals generated by partial discharge inside the switch cabinet, convert them into electrical signals, and transmit them to the data processing unit.

[0039] By using temperature sensors, insulation sensors, and partial discharge sensors, the cable temperature, leakage current, and partial discharge status inside the switchgear can be monitored in real time, improving the accuracy and real-time performance of the monitoring. Example

[0040] like Figure 2 , 3 As shown in Figure 4, this utility model discloses another technical solution: an integrated partial discharge insulation temperature measurement and detection device. The difference from embodiment 1 is that the housing 1 is detachably installed on the guide rail 5. A horizontally arranged mounting groove 6 is provided in the middle of the front side of the guide rail 5. The upper and lower inner walls of the mounting groove 6 are provided with horizontal sliding grooves 7. The upper and lower sides of the back of the housing 1 are rotatably connected by a rotating shaft to two left and right limiting wheels 8 protruding from the upper and lower surfaces of the housing 1. The back of the limiting wheels 8 is flush with the back of the housing 1, and the limiting wheels 8 are rotatably connected in the sliding grooves 7. The detection host can be easily slidably installed along the guide rail 5, which is convenient for adjustment and fixing the position. In addition, the edges of the mounting groove 6 and the edges of the sliding grooves 7 are provided with inclined guide surfaces to facilitate the installation of the detection host.

[0041] Specifically, multiple heat dissipation holes 9 are evenly provided on the mounting groove 6 to improve the heat dissipation effect, and fixing holes 10 are provided on the upper and lower parts of the guide rail 5 to facilitate fixing the guide rail 5 to the outer wall of the switch cabinet or the wall with fasteners such as bolts. Example

[0042] like Figure 5As shown, this utility model discloses another technical solution, an integrated detection device for partial discharge insulation temperature measurement. The difference from embodiment 1 is that the detection device also includes a background detection system. The background detection system is connected to the detection host through an RS485 interface, a communication cable and a Modbus communication protocol to realize remote monitoring and data management functions.

[0043] Specifically, the data processing unit uses a microprocessor, which integrates a signal acquisition module, a data storage module, a data analysis module, and a communication control module. The signal acquisition module is responsible for acquiring data sent by the temperature sensor, partial discharge sensor, and insulation sensor. The data storage module is used to store the acquired historical data. The data analysis module performs real-time analysis on the acquired data to determine the operating status of the electrical equipment and generates corresponding alarm information based on the analysis results. The communication control module controls the communication module to interact with the temperature sensor.

[0044] Specifically, the temperature sensor uses wireless passive sensing technology and adopts the ZigBee wireless transmission protocol. The communication module and the temperature sensor share the same wireless frequency band, which is 433MHz.

[0045] Specifically, display module 2 is an LCD screen used to display in real time the cable temperature monitored by the temperature sensor, the leakage current value detected by the insulation sensor, and the intensity of the partial discharge ultra-high frequency electromagnetic wave signal received by the partial discharge sensor. At the same time, display module 2 also displays the operation status analysis results generated by the data analysis module, so that users can intuitively understand the operation status of the switchgear.

[0046] Specifically, alarm module 4 uses an audible and visual alarm method and is connected to the data analysis module. When the data analysis module determines that there is an abnormality in the power supply operation, alarm module 4 issues an alarm signal to remind the user to deal with the safety hazard in time.

[0047] Specifically, button module 3 includes function selection buttons and parameter setting buttons. The function selection buttons allow users to switch between display modules 2 to show different detection data and analysis results. The parameter setting buttons allow users to adjust preset threshold range parameters within the data processing unit to meet the needs of different users.

[0048] Specifically, the partial discharge sensor is an ultra-high frequency (UHF) detection sensor that employs a three-in-one UHF, TEV, and HFCT partial discharge sensing technology. It boasts advantages such as high sensitivity, high reliability, and strong anti-interference capability, enabling accurate detection of partial discharge within the switchgear. When partial discharge occurs in the switchgear, it generates nanosecond-level steep current pulses, exciting a wide-band electromagnetic wave. The UHF detection sensor (i.e., UHF sensor, TEV sensor, and HFCT sensor) detects the high-frequency electromagnetic wave band (300MHz-2000MHz), which effectively avoids corona interference and power frequency interference from the switchgear. Furthermore, the UHF, TEV, and HFCT sensors utilize non-contact monitoring, ensuring uninterrupted and reliable operation of the equipment.

[0049] The integrated partial discharge insulation temperature measurement and detection equipment provided in this application involves the following steps during installation: First, the guide rail 5 is installed on a suitable location on the outside of the switchgear or wall using bolts and other fasteners through the fixing holes 10. Then, the limiting wheels 8 on the upper and lower sides of the back of the detection host housing 1 are aligned with the sliding grooves 7 on the upper and lower inner walls of the mounting groove 6 on the front side of the guide rail 5. The housing 1 is then slid into the mounting groove 6 along the direction of the sliding groove 7, allowing the limiting wheels 8 to roll within the sliding groove 7 until the housing 1 is in place. This installation method facilitates the installation and disassembly of the detection host, and is convenient for subsequent maintenance and repair work. When installing the temperature sensor, it is installed in a bundled manner on the three phase lines of the cable in the switchgear cable compartment, ensuring that the temperature sensing element is in close contact with the cable to accurately sense changes in cable temperature. The temperature sensor utilizes wireless passive sensing technology, obtaining electrical energy from the electromagnetic environment around the cable through a built-in passive power-harvesting device. Powered by itself, the system uses the ZigBee wireless transmission protocol to convert temperature signals into electrical signals in the 433MHz wireless band and send them to the data processing unit of the detection host. During installation, the insulation sensor (micro-current sensor) is installed on the three phase lines of the cable inside the switchgear cable tray, enabling it to accurately detect leakage current in each phase line. The leakage current signal detected by the insulation sensor is processed, and the abnormal signal is transmitted to the data processing unit. During installation, the partial discharge sensor (ultra-high frequency detection sensor) is magnetically attached to the inner wall of the switchgear, enabling it to effectively receive ultra-high frequency electromagnetic wave signals generated by partial discharge inside the switchgear and convert them into electrical signals for transmission to the data processing unit. The partial discharge sensor employs a three-in-one partial discharge sensing technology combining UHF, TEV, and HFCT, ensuring high sensitivity and accuracy in detecting partial discharge signals.

[0050] During switchgear operation, temperature sensors monitor cable temperature in real time, converting the temperature signal into an electrical signal and transmitting it wirelessly via ZigBee to the signal acquisition module of the data processing unit. Insulation sensors detect leakage current in each phase line and transmit any detected abnormal signals to the signal acquisition module. Partial discharge sensors receive ultra-high frequency electromagnetic wave signals generated by partial discharge, convert them into electrical signals, and also send them to the signal acquisition module. The signal acquisition module is responsible for collecting these signals from different sensors. The data processing unit uses a microprocessor, and its internal data storage module stores the collected historical data for subsequent querying and analysis. The data analysis module performs real-time analysis of the collected temperature, leakage current, and partial discharge ultra-high frequency electromagnetic wave signals based on preset threshold ranges and algorithms. For example, when the cable temperature exceeds the preset normal temperature range, or the leakage current detected by the insulation sensor exceeds the set threshold, or the partial discharge signal intensity detected by the partial discharge sensor exceeds the normal range, the data analysis module determines that there is an abnormality in the power supply operation and generates corresponding alarm information.

[0051] Display module 2 is an LCD screen that displays in real time the cable temperature monitored by the temperature sensor, the leakage current value detected by the insulation sensor, and the intensity of the partial discharge ultra-high frequency electromagnetic wave signal received by the partial discharge sensor. It also displays the operation status analysis results generated by the data analysis module. Maintenance personnel can intuitively and comprehensively understand the operation status of the switchgear through the LCD screen. Alarm module 4 is connected to the data analysis module. When the data analysis module determines that there is an abnormality in the power supply operation, alarm module 4 issues an audible and visual alarm signal to remind maintenance personnel to pay attention and deal with it in time. Different types of abnormalities can be set with different audible and visual alarm modes so that maintenance personnel can quickly determine the type of abnormality.

[0052] The communication module uses the 433MHz wireless frequency band and transmits the data processed by the data processing unit to the background detection system remotely through the RS485 interface, communication cable and Modbus communication protocol. The background detection system can centrally manage and analyze the detection data of multiple switchgear, realize the remote monitoring function, and the operation and maintenance personnel can view the detailed operation data of the switchgear at any time through the background system, and promptly discover and deal with potential problems.

[0053] Maintenance personnel can operate the equipment via button module 3. The function selection button is used to switch between different detection data and analysis results displayed on display module 2. For example, it can switch between interfaces for cable temperature, leakage current, partial discharge signal strength, and operating status analysis results. The parameter setting button can adjust the preset threshold range parameters within the data processing unit to adapt to the operating characteristics and detection needs of different switchgear. For example, the alarm thresholds for temperature, leakage current, and partial discharge signals can be reasonably adjusted according to different switchgear models and operating environments.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated partial discharge insulation temperature measurement and testing device, used to detect the power supply operation status within a switchgear, characterized in that, include: The detection host is used to complete data processing, including a housing (1) installed on the outside of the switch cabinet, and a display module (2), a button module (3), an alarm module (4), a data processing unit and a communication module integrated on the housing (1); The temperature sensor is a passive wireless temperature sensor, which is respectively bundled to the three phase wires of the indoor cable of the switch cabinet. It is used to monitor the temperature change of the cable in real time, convert the temperature signal into an electrical signal, and transmit it to the data processing unit. An insulation sensor, which is a micro-current sensor, is installed on the three phase wires of the indoor cable of the switch cabinet to detect the leakage current of each phase wire and transmit the detected abnormal signal to the data processing unit. A partial discharge sensor is magnetically attached to the inner wall of the switch cabinet to receive ultra-high frequency electromagnetic wave signals generated by partial discharge inside the switch cabinet, convert them into electrical signals, and transmit them to the data processing unit.

2. The integrated partial discharge insulation temperature measurement and testing device according to claim 1, characterized in that, The housing (1) is mounted on the guide rail (5). The guide rail (5) has a horizontally arranged mounting groove (6) on its front side. The upper and lower inner walls of the mounting groove (6) are provided with sliding grooves (7). The upper and lower sides of the back of the housing (1) are rotatably connected with limiting wheels (8) that protrude from the upper and lower surfaces of the housing (1). The back of the limiting wheel (8) is flush with the back of the housing (1), and the limiting wheel (8) is rolled in the sliding groove (7).

3. The integrated partial discharge insulation temperature measurement and testing device according to claim 2, characterized in that, The mounting groove (6) is provided with a plurality of heat dissipation holes (9) evenly distributed, and the upper and lower parts of the guide rail (5) are provided with fixing holes (10).

4. The integrated partial discharge insulation temperature measurement and testing device according to claim 1, characterized in that, The testing equipment also includes a background testing system, which is connected to the testing host via an RS485 interface, a communication cable, and the Modbus communication protocol.

5. The integrated partial discharge insulation temperature measurement and testing device according to claim 1, characterized in that, The data processing unit uses a microprocessor and integrates a signal acquisition module, a data storage module, a data analysis module, and a communication control module. The signal acquisition module is responsible for acquiring data sent by the temperature sensor, partial discharge sensor, and insulation sensor. The data storage module is used to store the acquired historical data. The data analysis module performs real-time analysis on the acquired data, determines the operating status of the electrical equipment, and generates corresponding alarm information based on the analysis results. The communication control module controls the communication module to interact with the temperature sensor.

6. The integrated partial discharge insulation temperature measurement and testing device according to claim 5, characterized in that, The temperature sensor uses wireless passive sensing technology and adopts the ZigBee wireless transmission protocol. The communication module and the temperature sensor share the same wireless frequency band, which is 433MHz.

7. The integrated partial discharge insulation temperature measurement and testing device according to claim 6, characterized in that, The display module (2) is an LCD screen, which is used to display in real time the cable temperature monitored by the temperature sensor, the leakage current value detected by the insulation sensor, and the intensity of the partial discharge ultra-high frequency electromagnetic wave signal received by the partial discharge sensor, and at the same time display the operation status analysis results generated by the data analysis module.

8. The integrated partial discharge insulation temperature measurement and testing device according to claim 7, characterized in that, The alarm module (4) uses an audible and visual alarm and is connected to the data analysis module. When the data analysis module determines that there is an abnormality in the power supply operation, the alarm module (4) issues an alarm signal.

9. The integrated partial discharge insulation temperature measurement and testing device according to claim 8, characterized in that, The button module (3) includes a function selection button and a parameter setting button. The function selection button switches the display module (2) to display different detection data and analysis results. The parameter setting button adjusts the preset threshold range parameters in the data processing unit.

10. The integrated partial discharge insulation temperature measurement and detection device according to claim 1, characterized in that, The partial discharge sensor is an ultra-high frequency detection sensor that uses a three-in-one partial discharge sensing technology combining UHF, TEV and HFCT.

Images