A partial discharge detection device

Abstract

The application relates to the technical field of discharge detection, and discloses a partial discharge detection device which comprises a partial discharge centralized collection online monitoring host, an ultrasonic sensor, a transient ground voltage sensor, an ultrahigh frequency partial discharge intelligent sensor and a high frequency current partial discharge intelligent sensor. The ultrasonic sensor, the transient ground voltage sensor, the ultrahigh frequency partial discharge intelligent sensor and the high frequency current partial discharge intelligent sensor jointly perform discharge detection to determine the operation condition of the equipment under test. The intelligent sensor monitoring technologies of transient ground voltage (TEV), ultrasonic wave (AE & Ultrasonic), ultrahigh frequency (UHF) and high frequency (HF) realize intelligent sensing of the operation state of the power equipment. Multiple detection modes are provided so as to meet different detection requirements and improve the accuracy of detection effect. The operation state is mastered in real time, defects are found in time, abnormal information and maintenance strategy suggestions are evaluated and pushed, data support is provided for maintenance personnel to formulate a maintenance strategy, and sudden events are effectively avoided.

Description

Technical Field

[0001] This application relates to the field of discharge detection technology, for example to a partial discharge detection device. Background Technology

[0002] A portable handheld partial discharge detector (publication number: CN219695347U) is disclosed, comprising a handheld partial discharge detector body, an operating lever, a connecting frame, a mounting frame, a fixing frame, a positioning mechanism, and an adjustment mechanism. The handheld partial discharge detector body includes a test host and an ultrasonic probe electrically connected to the test host. The operating lever is located on one side of the handheld partial discharge detector body. The connecting frame is slidably mounted on the operating lever. The mounting frame is mounted on the connecting frame. The fixing frame is fixedly mounted on the mounting frame. The positioning mechanism is located on the fixing frame and is used to fix the ultrasonic probe. The adjustment mechanism is located on the connecting frame and the mounting frame and is used to adjust the operating angle of the ultrasonic probe.

[0003] In implementing the above embodiments, at least the following problems were found in the related technology: This portable handheld partial discharge detector uses a mounting bracket and positioning mechanism to clamp and secure the ultrasonic probe. Once secured, the probe's angle can be adjusted via an adjustment mechanism, facilitating the testing of electrical equipment. However, its reliance solely on the ultrasonic probe for partial discharge detection has limitations and cannot meet diverse testing needs.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a partial discharge detection device to solve the problems mentioned in the background art.

[0007] In some embodiments, the partial discharge detection device includes: a centralized partial discharge acquisition and online monitoring host, comprising a host body and a display screen, the display screen being mounted on the host body and electrically connected to the host body; an ultrasonic sensor, wirelessly communicating with the host body, configured to detect acoustic signals generated by power equipment during discharge; a transient ground voltage sensor, wirelessly communicating with the host body, configured to detect transient voltage pulse signals caused by partial discharge of power equipment; an ultra-high frequency partial discharge intelligent sensor, wirelessly communicating with the host body, configured to detect ultra-high frequency electromagnetic wave signals generated by partial discharge of power equipment; and a high-frequency current partial discharge intelligent sensor, wirelessly communicating with the host body, configured to detect discharge pulse current signals flowing through the power equipment cable; wherein the host body is used to receive detection data from the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, and the high-frequency current partial discharge intelligent sensor in real time, and to send synchronization time calibration commands; the display screen is used to display the detection data and configure the parameters of the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, and the high-frequency current partial discharge intelligent sensor.

[0008] Optionally, the main unit includes: a WiFi antenna; a 4G / 5G antenna adjacent to the WiFi antenna and located on one side of the WiFi antenna; and a 433M / 2.4G / LoRa antenna adjacent to the WiFi antenna and located on the other side of the WiFi antenna; wherein the WiFi antenna, the 4G / 5G antenna, and the 433M / 2.4G / LoRa antenna are all used to receive and transmit wireless signals.

[0009] Optionally, the host unit further includes: a first RS485 interface for transmitting signals; a second RS485 interface adjacent to the first RS485 interface for transmitting signals; and a third RS485 interface adjacent to the second RS485 interface for transmitting signals; wherein the second RS485 interface is located between the first RS485 interface and the third RS485 interface.

[0010] Optionally, the main unit further includes: a first audible and visual alarm interface; and a second audible and visual alarm interface, adjacent to the first audible and visual alarm; wherein both the first audible and visual alarm interface and the second audible and visual alarm interface are used to connect external audible and visual alarms.

[0011] Optionally, the main unit further includes: a first relay interface; and a second relay interface adjacent to the first relay interface; wherein both the first relay interface and the second relay interface are used to connect external relays.

[0012] Optionally, the main unit further includes an AC / DC power input port for connecting an external power source.

[0013] Optionally, the main body further includes a grounding interface for connecting an external grounding wire.

[0014] Optionally, the main unit further includes an audio output interface for connecting external speakers or headphones.

[0015] Optionally, the host unit also includes an RJ45 network port for connecting an external network port.

[0016] Optionally, it further includes: a passive temperature intelligent sensor, which wirelessly communicates with the main body and is configured to detect the current temperature of the measured part of the power equipment in real time; wherein, the main body is used to receive the detection data of the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, the high frequency current partial discharge intelligent sensor and the passive temperature intelligent sensor in real time, and send a synchronization time calibration command; the display screen is used to display the detection data and configure the parameters of the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, the high frequency current partial discharge intelligent sensor and the passive temperature intelligent sensor.

[0017] The partial discharge detection device provided in this disclosure can achieve the following technical effects: This disclosure provides a partial discharge detection device, including a centralized partial discharge acquisition and online monitoring host, an ultrasonic sensor, a transient ground voltage sensor, an ultra-high frequency (UHF) partial discharge intelligent sensor, and a high-frequency current (HF) partial discharge intelligent sensor. The centralized partial discharge acquisition and online monitoring host includes a main body and a display screen, which is mounted on and electrically connected to the main body. The main body receives detection data from the ultrasonic sensor, transient ground voltage sensor, UHF partial discharge intelligent sensor, and high-frequency current partial discharge intelligent sensor in real time and sends synchronization and time calibration commands. The display screen displays the detection data and configures the parameters of the ultrasonic sensor, transient ground voltage sensor, UHF partial discharge intelligent sensor, and high-frequency current partial discharge intelligent sensor. Discharge detection is performed jointly by the ultrasonic sensor, transient ground voltage sensor, UHF partial discharge intelligent sensor, and high-frequency current partial discharge intelligent sensor to determine the operating condition of the tested equipment. Intelligent sensor monitoring technologies such as transient ground voltage (TEV), ultrasonic (AE & Ultrasonic), ultra-high frequency (UHF), and high frequency (HF) enable intelligent perception of the operating status of power equipment. Multiple detection methods are provided to meet different detection needs and improve the accuracy of detection results. Real-time monitoring of operational status enables timely detection of defects and problems, assessment and push notifications of abnormal information and maintenance strategy suggestions, providing data support for maintenance personnel to formulate maintenance strategies, and effectively preventing the occurrence of sudden power outages, fires, and personal injury or equipment damage incidents.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are considered similar elements. The drawings do not constitute a limitation of scale, and wherein: Figure 1 This is a schematic diagram of a partial discharge detection device provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of a partial discharge centralized acquisition online monitoring host of a partial discharge detection device provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the main body of the online monitoring host for centralized acquisition of partial discharge in a partial discharge detection device provided in an embodiment of this disclosure.

[0020] Figure label: 1000. Partial Discharge Centralized Acquisition and Online Monitoring Host; 1100. Main Unit; 1101. WiFi Antenna; 1102. 4G / 5G Antenna; 1103. 433M / 2.4G / LoRa Antenna; 1104. First RS485 Interface; 1105. Second RS485 Interface; 1106. Third RS485 Interface; 1107. First Audible and Visual Alarm Interface; 1108. Second Audible and Visual Alarm Interface; 1109. 1110, First relay interface; 1111, Second relay interface; 1111, AC / DC power input port; 1112, Grounding interface; 1113, Audio output interface; 1114, RJ45 network port; 1200, Display screen; 2000, Ultrasonic sensor; 3000, Transient ground voltage sensor; 4000, Ultra-high frequency partial discharge intelligent sensor; 5000, High frequency current partial discharge intelligent sensor; 6000, Passive temperature intelligent sensor. Detailed Implementation

[0021] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better describing the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0027] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0029] Combination Figures 1 to 3As shown, this embodiment of the present disclosure provides a partial discharge detection device, including a partial discharge centralized acquisition and online monitoring host 1000, an ultrasonic sensor 2000, a transient ground voltage sensor 3000, an ultra-high frequency partial discharge intelligent sensor 4000, and a high frequency current partial discharge intelligent sensor 5000. The partial discharge centralized acquisition and online monitoring host 1000 includes a main body 1100 and a display screen 1200. The display screen 1200 is mounted on the main body 1100 and electrically connected to it. The main body 1100 is used to receive detection data from the ultrasonic sensor 2000, the transient ground voltage sensor 3000, the ultra-high frequency partial discharge intelligent sensor 4000, and the high frequency current partial discharge intelligent sensor 5000 in real time, and to send synchronization and time calibration commands. The display screen 1200 is used to display the detection data and configure the parameters of the ultrasonic sensor 2000, the transient ground voltage sensor 3000, the ultra-high frequency partial discharge intelligent sensor 4000, and the high frequency current partial discharge intelligent sensor 5000.

[0030] The ultrasonic sensor 2000 communicates wirelessly with the main unit 1100 and is configured to detect the acoustic signals generated by electrical equipment during discharge. Electrical equipment generates acoustic signals during discharge. Based on the relationship between the energy released during discharge and the acoustic energy, changes in the sound pressure of the ultrasonic signal represent changes in the energy released during partial discharge. By measuring the sound pressure of the ultrasonic signal, the strength of the discharge can be inferred, and the operating condition of the inspected equipment can be determined.

[0031] The transient ground voltage sensor 3000 communicates wirelessly with the main unit 1100 and is configured to detect transient voltage pulse signals caused by partial discharge in power equipment. When a partial discharge occurs, a high-frequency current wave is generated at the discharge point and propagates in both directions. Due to the skin effect, the current wave concentrates on the inner surface of the metal cabinet and does not penetrate directly. At the point of metal breakage or insulation connection, the current wave transfers to the outer surface and enters free space as an electromagnetic wave. The rising edge of the electromagnetic wave hits the outer metal surface, generating a transient voltage to ground. The transient ground voltage sensor 3000 can detect transient voltage pulse signals caused by partial discharge, and reflects the strength of each partial discharge activity by the amplitude and frequency of the instantaneous voltage pulse, thereby determining the operating condition of the tested equipment.

[0032] The UHF partial discharge intelligent sensor 4000 communicates wirelessly with the main unit 1100 and is configured to detect UHF electromagnetic wave signals generated during partial discharge in power equipment. Power equipment insulators have high insulation strength and breakdown field strength. When partial discharge occurs within a very small area, the breakdown process is rapid, generating a very steep pulse current with a rise time of less than 1 ns, and exciting electromagnetic waves with frequencies up to several GHz. By detecting the UHF electromagnetic wave signals generated during partial discharge in power equipment using the UHF partial discharge intelligent sensor 4000, relevant information about partial discharge can be obtained, enabling partial discharge monitoring. Since corona interference in the field is mainly concentrated below 300MHz, the UHF method can effectively avoid corona interference, exhibiting high sensitivity and anti-interference capabilities, and providing advantages such as live partial discharge detection, location, and defect type identification.

[0033] The high-frequency current partial discharge intelligent sensor 5000 communicates wirelessly with the main unit 1100 and is configured to detect discharge pulse current signals flowing through the cables of power equipment. The high-frequency current partial discharge intelligent sensor 5000 is mainly divided into capacitive and inductive types. Its operation involves detecting discharge pulse current signals flowing through the grounding wire, neutral point connection, and cable body of the power equipment to determine the operating condition of the tested equipment.

[0034] In summary, the partial discharge detection device provided in this disclosure, in order to adapt to the development requirements of uninterrupted power equipment maintenance, realizes the monitoring of the operating status of power equipment under uninterrupted power conditions. It utilizes a combination of an ultrasonic sensor 2000, a transient ground voltage sensor 3000, a UHF intelligent partial discharge sensor 4000, and a high-frequency current intelligent partial discharge sensor 5000 to perform discharge detection and determine the operating condition of the inspected equipment. The use of intelligent sensor monitoring technologies such as transient ground voltage (TEV), ultrasonic (AE & Ultrasonic), UHF, and HF enables intelligent perception of the operating status of power equipment. It provides multiple detection methods to meet different detection needs and improve the accuracy of detection results. It allows for real-time monitoring of operating status, timely detection of defects, evaluation and push of abnormal information and maintenance strategy suggestions, providing data support for maintenance personnel to formulate maintenance strategies, and effectively preventing sudden power outages, fires, and personal injury or equipment damage.

[0035] Optionally, combined Figure 3As shown, the main unit 1100 includes a WiFi antenna 1101, a 4G / 5G antenna 1102, and a 433M / 2.4G / LoRa antenna 1103. The 4G / 5G antenna 1102 is adjacent to the WiFi antenna 1101 and located on one side of the WiFi antenna 1101. The 433M / 2.4G / LoRa antenna 1103 is adjacent to the WiFi antenna 1101 and located on the other side of the WiFi antenna 1101. The WiFi antenna 1101, 4G / 5G antenna 1102, and 433M / 2.4G / LoRa antenna 1103 are all used for receiving and transmitting wireless signals.

[0036] In this embodiment, a WiFi antenna 1101, a 4G / 5G antenna 1102, and a 433M / 2.4G / LoRa antenna 1103 are used to receive and transmit wireless signals respectively, to suit different scenarios. The WiFi antenna 1101 typically operates in the 2.4GHz or 5.8GHz frequency band. There are omnidirectional and directional antennas. Omnidirectional antennas can provide 360° signal coverage, such as common router and walkie-talkie antennas; directional antennas focus the signal in a specific direction, increasing signal strength and transmission distance. The 4G / 5G antennas 1102 are mainly 4G and 5G antennas respectively. The 4G antenna covers the main 4G LTE frequency band, while the 5G antenna operates in higher frequency bands, such as 600-6000MHz, and some 5G antennas also support the Sub-6GHz frequency band. 4G antennas are relatively mature and can meet certain data transmission rate and coverage requirements; 5G antennas have higher bandwidth and data transmission rates, support multiple-input multiple-output (MIMO) technology, and can achieve faster and more stable communication. The 433MHz band of the 1103 433MHz antenna has good propagation characteristics and a long transmission distance, but the data transmission rate is relatively low; the 2.4GHz band supports high-speed data transmission, but the transmission distance is relatively short; the LoRa antenna is based on LoRa technology and has the characteristics of long distance, low power consumption, and strong anti-interference ability.

[0037] Optionally, combined Figure 3 As shown, the main unit 1100 also includes a first RS485 interface 1104, a second RS485 interface 1105, and a third RS485 interface 1106. The first RS485 interface 1104 is used for signal transmission. The second RS485 interface 1105 is adjacent to the first RS485 interface 1104 and is also used for signal transmission. The third RS485 interface 1106 is adjacent to the second RS485 interface 1105 and is also used for signal transmission. The second RS485 interface is located between the first RS485 interface 1104 and the third RS485 interface 1106.

[0038] In this embodiment, an RS485 interface is used for signal transmission to achieve stable data transmission in multi-device scenarios, enabling long-distance wireless communication. It offers advantages such as support for multi-device networking, stable long-distance transmission, and strong anti-interference capabilities. A single RS485 bus can connect up to 32 slave devices and 1 master device, eliminating the need for additional hubs / switches. Without repeaters, RS485 can achieve a transmission distance of up to 1200 meters; with repeaters, the distance can be further extended, fully meeting the long-distance communication needs of industrial environments. Industrial environments contain strong electromagnetic interference sources such as motors and frequency converters, and the differential transmission method of RS485 can effectively cancel out this interference.

[0039] Optionally, combined Figure 3 As shown, the main unit 1100 also includes a first audible and visual alarm interface 1107 and a second audible and visual alarm interface 1108. The second audible and visual alarm interface 1108 is adjacent to the first audible and visual alarm interface. Both the first audible and visual alarm interface 1107 and the second audible and visual alarm interface 1108 are used to connect external audible and visual alarms.

[0040] In this embodiment, both the first audible and visual alarm interface 1107 and the second audible and visual alarm interface 1108 are used to connect external audible and visual alarms, enabling dual warnings via sound and light signals. In dangerous or abnormal scenarios, this transmits early warning information to those in the vicinity.

[0041] Optionally, combined Figure 3 As shown, the main body 1100 also includes a first relay interface 1109 and a second relay interface 1110. The second relay interface 1110 is adjacent to the first relay interface 1109. Both the first relay interface 1109 and the second relay interface 1110 are used to connect external relays.

[0042] In this embodiment, both the first relay interface 1109 and the second relay interface 1110 are used to connect external relays. The relays are used to indirectly control high-power / high-voltage devices with weak signals. They receive external control commands through the interfaces, trigger the electromagnetic switches inside the relays, and complete the control of high current by low current and control of high-voltage circuits by low-voltage circuits.

[0043] Optionally, combined Figure 3 As shown, the main unit 1100 also includes an AC / DC power input port 1111. The AC / DC power input port 1111 is used for connecting an external power source.

[0044] In this embodiment of the disclosure, the AC / DC power input port 1111 is used to connect an external power source for power supply.

[0045] Optionally, combined Figure 3As shown, the main body 1100 also includes a grounding interface 1112. The grounding interface 1112 is used to connect an external grounding wire.

[0046] In this embodiment of the disclosure, the grounding interface 1112 is used to connect an external grounding wire, so that when the electrical equipment fails, the current can be conducted to the ground through the ground to prevent electric shock accidents.

[0047] Optionally, combined Figure 3 As shown, the main unit 1100 also includes an audio output interface 1113. The audio output interface 1113 is used to connect external speakers or headphones.

[0048] In this embodiment of the disclosure, the audio output interface 1113 is used to connect an external speaker or headphones to transmit sound.

[0049] Optionally, combined Figure 3 As shown, the main unit 1100 also includes an RJ45 network port 1114. The RJ45 network port 1114 is used for connecting an external network port.

[0050] In this embodiment of the disclosure, the RJ45 network port 1114 is used for connecting an external network port to achieve network connectivity.

[0051] Optionally, combined Figure 1 As shown, it also includes a passive intelligent temperature sensor 6000. The passive intelligent temperature sensor 6000 communicates wirelessly with the main unit 1100 and is configured to detect the current temperature of the measured part of the power equipment in real time. The main unit 1100 is used to receive detection data from the ultrasonic sensor 2000, transient ground voltage sensor 3000, ultra-high frequency partial discharge intelligent sensor 4000, high frequency current partial discharge intelligent sensor 5000, and passive intelligent temperature sensor 6000 in real time, and to send synchronization and time calibration commands. The display screen 1200 is used to display the detection data and configure the parameters of the ultrasonic sensor 2000, transient ground voltage sensor 3000, ultra-high frequency partial discharge intelligent sensor 4000, high frequency current partial discharge intelligent sensor 5000, and passive intelligent temperature sensor 6000.

[0052] In this embodiment, a passive intelligent temperature sensor 6000 that wirelessly communicates with the main body 1100 is also included. The passive intelligent temperature sensor 6000 is used to detect the current temperature of the measured part of the power equipment in real time and to monitor the temperature of the measured power equipment.

[0053] The foregoing description and accompanying drawings have fully illustrated embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of this disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A partial discharge detection device, characterized in that, include: The partial discharge centralized acquisition online monitoring host includes a main body and a display screen, wherein the display screen is installed on the main body and electrically connected to the main body; An ultrasonic sensor, which communicates wirelessly with the main body, is configured to detect acoustic signals generated by the power equipment during discharge. A transient voltage sensor, which communicates wirelessly with the main body, is configured to detect transient voltage pulse signals caused by partial discharge of power equipment; The ultra-high frequency partial discharge intelligent sensor, which communicates wirelessly with the main body, is configured to detect ultra-high frequency electromagnetic wave signals generated when power equipment experiences partial discharge. A high-frequency current partial discharge intelligent sensor, which communicates wirelessly with the main body, is configured to detect discharge pulse current signals flowing through power equipment cables; The main unit is used to receive detection data from the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, and the high frequency current partial discharge intelligent sensor in real time, and send synchronization time calibration commands; the display screen is used to display the detection data and configure the parameters of the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, and the high frequency current partial discharge intelligent sensor. The host body includes: WiFi antenna; A 4G / 5G antenna is located adjacent to the WiFi antenna and on one side of the WiFi antenna. A 433M / 2.4G / LoRa antenna is located adjacent to the WiFi antenna and on the other side of the WiFi antenna. The WiFi antenna, the 4G / 5G antenna, and the 433M / 2.4G / LoRa antenna are all used to receive and transmit wireless signals. It also includes: a passive temperature intelligent sensor, which communicates wirelessly with the main body and is configured to detect the current temperature of the measured part of the power equipment in real time; The main unit is used to receive detection data from the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, the high frequency current partial discharge intelligent sensor, and the passive temperature intelligent sensor in real time, and send synchronization time calibration commands; the display screen is used to display the detection data and configure the parameters of the ultrasonic sensor, the transient ground voltage sensor, the ultra-high frequency partial discharge intelligent sensor, the high frequency current partial discharge intelligent sensor, and the passive temperature intelligent sensor.

2. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: The first RS485 interface is used for signal transmission; The second RS485 interface, adjacent to the first RS485 interface, is used to transmit signals. The third RS485 interface, adjacent to the second RS485 interface, is used to transmit signals; The second RS485 interface is located between the first RS485 interface and the third RS485 interface.

3. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: First-channel audio-visual alarm interface; The second audible and visual alarm interface is adjacent to the first audible and visual alarm interface. Both the first and second sound and light alarm interfaces are used to connect external sound and light alarms.

4. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: First relay interface; The second relay interface is adjacent to the first relay interface; Both the first relay interface and the second relay interface are used to connect external relays.

5. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: AC / DC power input port for connecting an external power source.

6. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: Grounding interface, used for connecting an external grounding wire.

7. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: Audio output interface for connecting external speakers or headphones.

8. The partial discharge detection device according to claim 1, characterized in that, The main unit also includes: The RJ45 port is used for connecting external network ports.

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