阅读说明：本技术 一种高压开关柜故障诊断系统和高压开关柜 (High tension switchgear fault diagnosis system and high tension switchgear ) 是由 冯宝联 王淑花 许铁军 曹小军 李琛 骆虎 于 2021-04-02 设计创作，主要内容包括：本发明实施例公开了一种高压开关柜故障诊断系统和高压开关柜。该高压开关柜故障诊断系统包括：智能测控终端、监控主机和报警模块,智能测控终端分别与监控主机和高压开关柜连接,报警模块与监控主机连接；通过局放特性监测模块、位置状态监测模块、机械特性监测模块、温升监测模块能够实现对高压开关柜更加全面的进行监测,以提高故障诊断的效率和可靠性,降低人工强度和运维成本,且将局放特性监测模块、位置状态监测模块、机械特性监测模块、温升监测模块和综合诊断分析模块集成在智能测控终端,由智能测控终端与监测主机和报警模块进行通信,可减少通信接口数量,简化通信接口线路,以提高通信传输的稳定性和可靠性。(The embodiment of the invention discloses a high-voltage switch cabinet fault diagnosis system and a high-voltage switch cabinet. This high tension switchgear fault diagnosis system includes: the intelligent measurement and control terminal is respectively connected with the monitoring host and the high-voltage switch cabinet, and the alarm module is connected with the monitoring host; through the partial discharge characteristic monitoring module, the position state monitoring module, mechanical characteristic monitoring module, temperature rise monitoring module can realize monitoring high tension switchgear more comprehensively, efficiency and reliability with fault diagnosis are improved, labor intensity and operation and maintenance cost are reduced, and partial discharge characteristic monitoring module, the position state monitoring module, mechanical characteristic monitoring module, temperature rise monitoring module and comprehensive diagnosis analysis module are integrated at intelligent measurement and control terminal, communicate with monitoring host and alarm module by intelligent measurement and control terminal, reducible communication interface quantity, simplify communication interface circuit, with stability and reliability that improve communication transmission.)

1. A high tension switchgear fault diagnosis system, comprising: the intelligent measurement and control terminal is respectively connected with the monitoring host and the high-voltage switch cabinet, and the alarm module is connected with the monitoring host; a circuit breaker, a grounding switch, a contact and a cable head are arranged in the high-voltage switch cabinet;

the intelligent measurement and control terminal comprises a partial discharge characteristic monitoring module, a position state monitoring module, a mechanical characteristic monitoring module, a temperature rise monitoring module and a comprehensive diagnosis and analysis module; the partial discharge characteristic monitoring module, the position state monitoring module, the mechanical characteristic monitoring module and the temperature rise monitoring module are respectively and electrically connected with the comprehensive diagnosis and analysis module; the partial discharge characteristic monitoring module is used for monitoring a partial discharge value of the high-voltage switch cabinet, the position state monitoring module is used for monitoring the positions of the circuit breaker and the grounding switch, and the mechanical characteristic monitoring module is used for monitoring the mechanical characteristic of the circuit breaker; the temperature rise monitoring module is used for monitoring the temperatures of the contact and the cable head;

the comprehensive diagnosis and analysis module is used for judging whether the high-voltage switch cabinet is abnormal or not according to the local discharge value monitored by the local discharge characteristic monitoring module, the position information of the circuit breaker and the grounding switch monitored by the position state monitoring module, the mechanical characteristic of the circuit breaker monitored by the mechanical characteristic monitoring module and the temperature of the contact and the cable head monitored by the temperature rise monitoring module and sending a judgment result to the monitoring host; the monitoring host is used for sending alarm information to the alarm module when the high-voltage switch cabinet is abnormal.

2. The fault diagnosis system for the high-voltage switch cabinet according to claim 1, wherein the partial discharge characteristic monitoring module comprises a high-frequency sensor and a transient voltage sensor, the high-frequency sensor is disposed in a cable chamber of the high-voltage switch cabinet and electrically connected to the comprehensive diagnosis and analysis module, and is configured to monitor a partial discharge value inside the high-voltage switch cabinet and send the partial discharge value to the comprehensive diagnosis and analysis module; the transient ground voltage sensor is arranged outside the high-voltage switch cabinet, is electrically connected with the comprehensive diagnosis and analysis module and is used for monitoring a partial discharge value outside the high-voltage switch cabinet.

3. The fault diagnosis system for the high-voltage switch cabinet according to claim 1, wherein the position state monitoring module comprises a video monitoring unit and a sensor monitoring unit, and the video monitoring unit is electrically connected with the comprehensive diagnosis and analysis module and is used for acquiring position image information of the circuit breaker and position image information of the grounding switch and sending the position image information to the comprehensive diagnosis and analysis module; the sensor monitoring unit is electrically connected with the comprehensive diagnosis and analysis module and is used for acquiring the position state information of the circuit breaker and the position state information of the grounding switch and sending the position state information to the comprehensive diagnosis and analysis module.

4. The high-voltage switch cabinet fault diagnosis system according to claim 3, wherein the video monitoring unit comprises a first camera and a second camera, the first camera is arranged in a handcart chamber of the circuit breaker and is electrically connected with the comprehensive diagnosis and analysis module; the second camera is arranged in a cable chamber of the high-voltage switch cabinet and is electrically connected with the comprehensive diagnosis and analysis module.

5. The high-voltage switch cabinet fault diagnosis system according to claim 3, wherein the sensor monitoring unit comprises a first laser sensor and a second laser sensor, and the first laser sensor is arranged in a handcart chamber of the circuit breaker and used for monitoring position state information of the circuit breaker handcart; the second laser sensor is arranged at the position of the operating shaft accessory of the grounding switch and used for monitoring the position state information of the grounding switch.

6. The high voltage switch cabinet fault diagnosis system according to claim 1, wherein the mechanical characteristic monitoring module comprises a displacement monitoring unit, the displacement monitoring unit is arranged on an insulating pull rod of the circuit breaker, and the displacement monitoring unit is electrically connected with the comprehensive diagnosis and analysis module.

7. The high voltage switch cabinet fault diagnosis system according to claim 6, wherein the displacement monitoring unit is an infrared displacement sensor.

8. The high-voltage switch cabinet fault diagnosis system according to claim 1, further comprising an anti-misoperation lockout control module for realizing a five-prevention lockout function of the high-voltage switch cabinet, namely preventing a circuit breaker from being mistakenly opened and closed; the isolating switch is prevented from being pulled and closed under the load; preventing the grounding wire or the grounding switch from being hung in a charged state; preventing the grounding wire from connecting the isolating switch; prevent the wrong entering into the electrified interval.

9. The fault diagnosis system for the high-voltage switch cabinet according to claim 1, further comprising an environment temperature and humidity monitoring unit, wherein the environment temperature and humidity monitoring unit is electrically connected with the comprehensive diagnosis and analysis module and is used for monitoring the environment temperature and humidity in the high-voltage switch cabinet.

10. A high voltage switchgear characterized in that it comprises a high voltage switchgear fault diagnosis system according to any of claims 1-9.

Technical Field

The embodiment of the invention relates to a power transmission and distribution system fault diagnosis technology, in particular to a high-voltage switch cabinet fault diagnosis system and a high-voltage switch cabinet.

Background

High-voltage switch cabinets are important equipment in power transmission and distribution systems, but the failure rate caused by various reasons in the operation of the equipment is always high, and the failures have influence on the insulating performance of insulating materials in the switch cabinets if the failures are light, and serious safety accidents such as power failure, fire disasters, explosion and the like can be caused if the failures are serious. Therefore, how to ensure the safe and reliable operation of the high-voltage switch cabinet is very important.

In the prior art, monitoring of a high-voltage switch cabinet is generally performed by adopting a plurality of devices, and modes of manual inspection and data management are combined. However, the number of detection devices is large, the number of required communication lines and communication interfaces is large and complex, the problem of unstable communication is easily caused, the labor inspection working intensity is high, the operation and maintenance cost is high, and the personal safety of inspection personnel cannot be guaranteed.

Disclosure of Invention

The invention provides a high-voltage switch cabinet fault diagnosis system and a high-voltage switch cabinet, which improve the monitoring efficiency and reliability of the high-voltage switch cabinet, reduce the labor intensity and the operation and maintenance cost, simplify the number of communication interfaces, and improve the stability and reliability of communication transmission.

In a first aspect, an embodiment of the present invention provides a high voltage switch cabinet fault diagnosis system, where the high voltage switch cabinet fault diagnosis system includes: the intelligent measurement and control terminal is respectively connected with the monitoring host and the high-voltage switch cabinet, and the alarm module is connected with the monitoring host; a circuit breaker, a grounding switch, a contact and a cable head are arranged in the high-voltage switch cabinet;

the intelligent measurement and control terminal comprises a partial discharge characteristic monitoring module, a position state monitoring module, a mechanical characteristic monitoring module, a temperature rise monitoring module and a comprehensive diagnosis and analysis module; the partial discharge characteristic monitoring module, the position state monitoring module, the mechanical characteristic monitoring module and the temperature rise monitoring module are respectively and electrically connected with the comprehensive diagnosis and analysis module; the partial discharge characteristic monitoring module is used for monitoring a partial discharge value of the high-voltage switch cabinet, the position state monitoring module is used for monitoring the positions of the circuit breaker and the grounding switch, and the mechanical characteristic monitoring module is used for monitoring the mechanical characteristic of the circuit breaker; the temperature rise monitoring module is used for monitoring the temperatures of the contact and the cable head;

the comprehensive diagnosis and analysis module is used for judging whether the high-voltage switch cabinet is abnormal or not according to the local discharge value monitored by the local discharge characteristic monitoring module, the position information of the circuit breaker and the grounding switch monitored by the position state monitoring module, the mechanical characteristic of the circuit breaker monitored by the mechanical characteristic monitoring module and the temperature of the contact and the cable head monitored by the temperature rise monitoring module and sending a judgment result to the monitoring host; the monitoring host is used for sending alarm information to the alarm module when the high-voltage switch cabinet is abnormal.

Optionally, the partial discharge characteristic monitoring module includes a high-frequency sensor and a transient ground voltage sensor, the high-frequency sensor is disposed in a cable chamber of the high-voltage switch cabinet, and is electrically connected to the comprehensive diagnosis and analysis module, and is configured to monitor a partial discharge value inside the high-voltage switch cabinet and send the partial discharge value to the comprehensive diagnosis and analysis module; the transient ground voltage sensor is arranged outside the high-voltage switch cabinet, is electrically connected with the comprehensive diagnosis and analysis module and is used for monitoring a partial discharge value outside the high-voltage switch cabinet.

Optionally, the position state monitoring module includes a video monitoring unit and a sensor monitoring unit, and the video monitoring unit is electrically connected to the comprehensive diagnosis and analysis module, and is configured to acquire position image information of the circuit breaker and position image information of the earthing switch and send the position image information to the comprehensive diagnosis and analysis module; the sensor monitoring unit is electrically connected with the comprehensive diagnosis and analysis module and is used for acquiring the position state information of the circuit breaker and the position state information of the grounding switch and sending the position state information to the comprehensive diagnosis and analysis module.

Optionally, the video monitoring unit includes a first camera and a second camera, and the first camera is disposed in a handcart room of the circuit breaker and electrically connected to the comprehensive diagnosis and analysis module; the second camera is arranged in a cable chamber of the high-voltage switch cabinet and is electrically connected with the comprehensive diagnosis and analysis module.

Optionally, the sensor monitoring unit includes a first laser sensor and a second laser sensor, and the first laser sensor is disposed in a handcart room of the circuit breaker and is used for monitoring position state information of the circuit breaker handcart; the second laser sensor is arranged at the position of the operating shaft accessory of the grounding switch and used for monitoring the position state information of the grounding switch.

Optionally, the mechanical characteristic monitoring module includes a displacement monitoring unit, the displacement monitoring unit is disposed on the insulating pull rod of the circuit breaker, and the displacement monitoring unit is electrically connected to the comprehensive diagnosis and analysis module.

Optionally, the displacement monitoring unit is an infrared displacement sensor.

Optionally, the fault diagnosis system of the high-voltage switch cabinet further comprises an anti-misoperation locking control module for realizing a five-prevention locking function of the high-voltage switch cabinet, namely preventing mistaken opening and mistaken closing of the circuit breaker; the isolating switch is prevented from being pulled and closed under the load; preventing the grounding wire or the grounding switch from being hung in a charged state; preventing the grounding wire from connecting the isolating switch; prevent the wrong entering into the electrified interval.

Optionally, the fault diagnosis system for the high-voltage switch cabinet further comprises an environment temperature and humidity monitoring unit, wherein the environment temperature and humidity monitoring unit is electrically connected with the comprehensive diagnosis and analysis module and is used for monitoring the environment temperature and humidity in the high-voltage switch cabinet.

In a second aspect, the embodiment of the present invention further provides a high voltage switch cabinet, which includes the high voltage switch cabinet fault diagnosis system as described in the first aspect.

The invention provides a high-voltage switch cabinet fault diagnosis system and a high-voltage switch cabinet, wherein the high-voltage switch cabinet fault diagnosis system comprises: the intelligent measurement and control terminal is respectively connected with the monitoring host and the high-voltage switch cabinet, and the alarm module is connected with the monitoring host; a circuit breaker, a grounding switch, a contact and a cable head are arranged in the high-voltage switch cabinet; the intelligent measurement and control terminal comprises a partial discharge characteristic monitoring module, a position state monitoring module, a mechanical characteristic monitoring module, a temperature rise monitoring module and a comprehensive diagnosis and analysis module; the partial discharge characteristic monitoring module, the position state monitoring module, the mechanical characteristic monitoring module and the temperature rise monitoring module are respectively and electrically connected with the comprehensive diagnosis and analysis module; the partial discharge characteristic monitoring module is used for monitoring a partial discharge value of the high-voltage switch cabinet, the position state monitoring module is used for monitoring the positions of the circuit breaker and the grounding switch, and the mechanical characteristic monitoring module is used for monitoring the mechanical characteristic of the circuit breaker; the temperature rise monitoring module is used for monitoring the temperature of the contact and the cable head; the comprehensive diagnosis and analysis module is used for judging whether the high-voltage switch cabinet is abnormal or not according to the local discharge value monitored by the local discharge characteristic monitoring module, the position information of the circuit breaker and the grounding switch monitored by the position state monitoring module, the mechanical characteristic of the circuit breaker monitored by the mechanical characteristic monitoring module and the temperature of the contact and the cable head monitored by the temperature rise monitoring module and sending a judgment result to the monitoring host; the monitoring host is used for sending alarm information to the alarm module when the high-voltage switch cabinet is abnormal. Therefore, the local discharge characteristic monitoring module is arranged, the position state monitoring module, the mechanical characteristic monitoring module, the temperature rise monitoring module can realize more comprehensive monitoring on the high-voltage switch cabinet, the efficiency and the reliability of fault diagnosis are improved, the labor intensity and the operation and maintenance cost are reduced, the local discharge characteristic monitoring module, the position state monitoring module, the mechanical characteristic monitoring module, the temperature rise monitoring module and the comprehensive diagnosis and analysis module are integrated at an intelligent measurement and control terminal, the intelligent measurement and control terminal is communicated with a monitoring host and an alarm module, the number of communication interfaces can be reduced, communication interface circuits are simplified, and the stability and the reliability of communication transmission are improved.

Drawings

Fig. 1 is a schematic structural diagram of a fault diagnosis system for a high-voltage switch cabinet according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fault diagnosis system of a high-voltage switch cabinet in a second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Example one

Fig. 1 is a schematic structural diagram of a fault diagnosis system for a high voltage switch cabinet according to a first embodiment of the present invention. Referring to fig. 1, the high voltage switchgear fault diagnosis system includes: the intelligent measurement and control terminal 100 is respectively connected with the monitoring host 200 and the high-voltage switch cabinet 10, and the alarm module 300 is connected with the monitoring host 200; a circuit breaker 11, a grounding switch 12, a contact 13 and a cable head 14 are arranged in the high-voltage switch cabinet 10;

the intelligent measurement and control terminal 100 comprises a partial discharge characteristic monitoring module 110, a position state monitoring module 120, a mechanical characteristic monitoring module 130, a temperature rise monitoring module 140 and a comprehensive diagnosis and analysis module 150; the partial discharge characteristic monitoring module 110, the position state monitoring module 120, the mechanical characteristic monitoring module 130 and the temperature rise monitoring module 140 are respectively electrically connected with the comprehensive diagnosis and analysis module 150; the partial discharge characteristic monitoring module 110 is configured to monitor a partial discharge value of the high voltage switch cabinet 10, the position state monitoring module 120 is configured to monitor positions of the circuit breaker 11 and the grounding switch 12, and the mechanical characteristic monitoring module 130 is configured to monitor a mechanical characteristic of the circuit breaker 11; the temperature rise monitoring module 140 is used for monitoring the temperature of the contact 13 and the cable head 14;

the comprehensive diagnosis and analysis module 150 is configured to determine whether the high-voltage switch cabinet 10 is abnormal according to the partial discharge value monitored by the partial discharge characteristic monitoring module 110, the position information of the circuit breaker 11 and the grounding switch 12 monitored by the position state monitoring module 120, the mechanical characteristic of the circuit breaker 11 monitored by the mechanical characteristic monitoring module 130, and the temperatures of the contact 13 and the cable head 14 monitored by the temperature rise monitoring module 140, and send a determination result to the monitoring host; the monitoring host 200 is configured to send alarm information to the alarm module 300 when an abnormality occurs in the high voltage switch cabinet 10.

The mechanical characteristics of the circuit breaker 11 may include parameters of the circuit breaker such as switching-on and switching-off time, switching-on and switching-off speed, over travel, and opening distance. The temperature rise monitoring module 140 may be a wireless temperature sensor.

Among the partial discharge value monitored by the partial discharge characteristic monitoring module 110, the position information of the circuit breaker 11 and the grounding switch 12 monitored by the position state monitoring module 120, the mechanical characteristic of the circuit breaker 11 monitored by the mechanical characteristic monitoring module 130, and the temperatures of the contact 13 and the cable head 14 monitored by the temperature rise monitoring module 140, when any one of the detected data is abnormal, it can be considered that the high-voltage switch cabinet 10 is abnormal. Once the comprehensive diagnosis and analysis module 150 determines that data is abnormal, it sends abnormal information of the high-voltage switch cabinet 10 to the monitoring host 200, and when the monitoring host 200 receives the abnormal information of the high-voltage switch cabinet 10, it sends the abnormal information to the remote client 30 through the server 20, and generates an alarm signal according to the abnormal information and sends the alarm signal to the alarm module 300, so that the alarm module 300 sends an alarm action to warn relevant personnel to perform corresponding processing.

It should be noted that, when the comprehensive diagnosis and analysis module 150 determines that the data of each monitoring module is not abnormal, the monitoring module will send monitoring information that no abnormality occurs to the monitoring host 200, and the monitoring host 200 will record all the data sent by the comprehensive diagnosis and analysis module 150, so as to check the historical data in the subsequent investigation.

In the technical scheme of this embodiment, the implementation process of the high-voltage switch cabinet fault diagnosis system is as follows: referring to fig. 1, the intelligent measurement and control terminal 100 monitors various index parameters of the high voltage switch cabinet 10 in real time and sends the monitoring result to the monitoring host 200, specifically, the intelligent measurement and control terminal 100 includes an partial discharge characteristic monitoring module 110, a position state monitoring module 120, a mechanical characteristic monitoring module 130, a temperature rise monitoring module 140 and a comprehensive diagnosis and analysis module 150, the partial discharge characteristic monitoring module 110 monitors a partial discharge value of the high voltage switch cabinet 10 in real time and sends the partial discharge value to the comprehensive diagnosis and analysis module 150, the position state monitoring module 120 monitors position information of the circuit breaker 11 and the grounding switch 12 in the high voltage switch cabinet 10 in real time and sends the position information to the comprehensive diagnosis and analysis module 150, the mechanical characteristic monitoring module 130 monitors mechanical characteristics of the circuit breaker 11 in the high voltage switch cabinet 10 in real time and sends the mechanical characteristics to the comprehensive diagnosis and analysis module 150, the temperature rise monitoring module 140 monitors temperatures of the contact 13 and the cable head 14 in the high voltage switch cabinet 10 in, the comprehensive diagnosis and analysis module 150 compares the received partial discharge value monitored by the partial discharge characteristic monitoring module 110 with a preset partial discharge value to determine whether the partial discharge characteristic of the high-voltage switch cabinet 10 is abnormal; the comprehensive diagnosis and analysis module 150 compares the received position information of the circuit breaker 11 and the earthing switch 12 monitored by the position state monitoring module 120 with preset circuit breaker position information and preset earthing switch position information respectively to judge whether the position information of the circuit breaker 11 and the position information of the earthing switch 12 are abnormal or not; the comprehensive diagnosis and analysis module 150 compares the received mechanical characteristics of the circuit breaker 11 monitored by the mechanical characteristic monitoring module 130 with preset mechanical characteristics to judge whether the mechanical characteristics of the circuit breaker 11 are abnormal; the comprehensive diagnosis and analysis module 150 compares the temperatures of the contact 13 and the cable head 14 monitored by the received temperature rise monitoring module 140 with a preset contact temperature and a preset cable head temperature respectively to determine whether the temperatures of the contact 13 and the cable head 14 are abnormal. When the comprehensive diagnosis and analysis module 150 determines that the data monitored by each monitoring module is abnormal, the abnormal information is sent to the monitoring host 200, the monitoring host 200 sends the abnormal information to the remote client 30 through the server 20, and generates an alarm signal according to the abnormal information and sends the alarm signal to the alarm module 300, so that the alarm module 300 sends an alarm action to warn relevant personnel. Therefore, the partial discharge characteristic monitoring module 110, the position state monitoring module 120, the mechanical characteristic monitoring module 130 and the temperature rise monitoring module 140 can be used for monitoring the high-voltage switch cabinet 10 more comprehensively, so that the efficiency and the reliability of fault diagnosis are improved, the labor intensity and the operation and maintenance cost are reduced, the partial discharge characteristic monitoring module 110, the position state monitoring module 120, the mechanical characteristic monitoring module 130, the temperature rise monitoring module 140 and the comprehensive diagnosis and analysis module 150 are integrated on the intelligent measurement and control terminal 100, the intelligent measurement and control terminal 100 is communicated with the monitoring host 200 and the alarm module 300, the number of communication interfaces can be reduced, communication interface circuits are simplified, and the stability and the reliability of communication transmission are improved.

It may be set that when the partial discharge value monitored by the partial discharge characteristic monitoring module 110, the position information of the circuit breaker 11 and the earthing switch 12 monitored by the position state monitoring module 120, the mechanical characteristic of the circuit breaker 11 monitored by the mechanical characteristic monitoring module 130, and the temperatures of the contact 13 and the cable head 14 monitored by the temperature rise monitoring module 140 exceed their respective preset values by a certain multiple, for example, by 2 times, a fault alarm instruction should be given. It should be noted that the preset partial discharge value, the preset breaker position information, the preset position information of the grounding switch, the preset mechanical property, the preset contact temperature and the preset cable head temperature may be set according to actual conditions, and no specific limitation is made herein.

Example two

Fig. 2 is a schematic structural diagram of a fault diagnosis system for a high-voltage switch cabinet according to a second embodiment of the present invention. On the basis of the first embodiment, optionally, referring to fig. 2, the partial discharge characteristic monitoring module 110 includes a high-frequency sensor 111 and a transient ground voltage sensor 112, where the high-frequency sensor 111 is disposed in a cable chamber of the high-voltage switch cabinet 10 and electrically connected to the comprehensive diagnosis and analysis module 150, and is configured to monitor a partial discharge value inside the high-voltage switch cabinet 10 and send the partial discharge value to the comprehensive diagnosis and analysis module 150; the transient ground voltage sensor 112 is disposed outside the high voltage switch cabinet 10, and is electrically connected to the comprehensive diagnosis and analysis module 150, for monitoring a partial discharge value outside the high voltage switch cabinet 10.

The partial discharge value of the high-voltage switch cabinet 10 monitored in real time by the partial discharge characteristic monitoring module 110 is sent to the comprehensive diagnosis and analysis module 150, the comprehensive diagnosis and analysis module 150 compares the received partial discharge value of the high-voltage switch cabinet 10 monitored by the partial discharge characteristic monitoring module 110 with a preset partial discharge value, and sends a comparison and analysis result to the monitoring host 200, and the monitoring host 200 determines whether to send alarm information, maintenance instruction information and the like. Specifically, if the partial discharge value monitored in real time is within the range of 0-64pC, the comprehensive diagnosis and analysis module 150 sends a command that the high-voltage switch cabinet can continuously and normally operate to the monitoring host 200; if the partial discharge value monitored in real time is within the interval range of 64-76pC, the monitoring host 200 sends out attention warning information through the alarm module 300; if the partial discharge value monitored in real time is within the interval range of 76-88pC, the monitoring host 200 sends out abnormal alarm information through the alarm module 300 and sends a command needing to be detected to the remote client 30 through the server 20; if the partial discharge value monitored in real time is within the range of 88-100pC, the monitoring host 200 sends out serious alarm information through the alarm module 300, and sends a power failure maintenance instruction to the remote client 30 through the server 20.

In addition, the high-frequency sensor 111 is arranged to monitor the local discharge value inside the high-voltage switch cabinet 10, the transient ground voltage sensor 112 is arranged to monitor the local discharge value outside the high-voltage switch cabinet 10, so that the local discharge condition of the high-voltage switch cabinet 10 can be monitored more comprehensively, and once the local discharge value of the high-voltage switch cabinet 10 is abnormal, abnormal information can be uploaded to the remote client 30 in time and an alarm is given, so that the normal operation of the high-voltage switch cabinet 10 can be ensured.

Optionally, with continued reference to fig. 2, the position status monitoring module 120 includes a video monitoring unit 121 and a sensor monitoring unit 122, and the video monitoring unit 121 is electrically connected to the comprehensive diagnosis and analysis module 150, and is configured to obtain position image information of the circuit breaker 11 and position image information of the earthing switch 12 and send the position image information to the comprehensive diagnosis and analysis module 150; the sensor monitoring unit 122 is electrically connected to the comprehensive diagnosis and analysis module 150, and is configured to obtain the position state information of the circuit breaker 11 and the position state information of the earthing switch 12, and send the information to the comprehensive diagnosis and analysis module 150.

The video monitoring unit 121 is arranged to monitor the position image information of the circuit breaker 11 and the position image information of the grounding switch 12 respectively, and the circuit breaker 11 and the grounding switch 12 are monitored at one time through image monitoring; the sensor monitoring unit 122 is arranged to monitor the position state information of the circuit breaker 11 and the position state information of the grounding switch 12 respectively, so as to realize secondary monitoring of the circuit breaker 11 and the grounding switch 12. From this, realize the two-way control to circuit breaker 11 and earthing switch 12 respectively through video monitoring unit 121 and sensor monitoring unit 122, improve the accuracy of monitoring, improve fault diagnosis's accuracy and efficiency to more be favorable to guaranteeing the steady operation of high tension switchgear 10.

Optionally, the video monitoring unit 121 includes a first camera and a second camera, the first camera is disposed in the handcart room of the circuit breaker 11, and is electrically connected to the comprehensive diagnosis and analysis module 150; the second camera is disposed in the cable chamber of the high voltage switch cabinet 10 and electrically connected to the comprehensive diagnosis and analysis module 150.

In order to improve the accuracy and reliability of image monitoring of the circuit breaker 11 and the grounding switch 12, at least two first cameras can be installed in a handcart room of the circuit breaker 11 and used for comprehensively monitoring position state image information of the circuit breaker 11 in real time; at least two second cameras can be installed in the cable chamber of the high-voltage switch cabinet 10 for real-time and comprehensive monitoring of the position state image information of the grounding switch 12.

The position image information of the circuit breaker 11 may include state information of the handcart of the circuit breaker 11, and the position image information of the grounding switch 12 may include position state information of the grounding switch 12.

Optionally, the sensor monitoring unit 122 includes a first laser sensor and a second laser sensor, where the first laser sensor is disposed in the handcart room of the circuit breaker 11 and is used for monitoring position state information of the handcart of the circuit breaker 11; the second laser sensor is disposed near the operating shaft of the grounding switch 12 for monitoring the position status information of the grounding switch.

In order to improve the accuracy and reliability of monitoring of the sensors of the circuit breaker 11 and the grounding switch 12, at least two first laser sensors can be installed in a handcart room of the circuit breaker 11 according to a specified size range (which can be set according to actual conditions) and used for monitoring the position state information of the handcart of the circuit breaker 11 in real time; at least two second laser sensors may be provided near the operating shaft of the earthing switch 12 for real-time monitoring of the position status information of the earthing switch 12.

The position state information of the circuit breaker 11 may include position information such as a working position, a test position, and a maintenance position of the circuit breaker 11; the position state information of the grounding switch 12 may include information of closing, opening and intermediate positions of the grounding switch.

Alternatively, referring to fig. 2, the mechanical characteristic monitoring module 130 includes a displacement monitoring unit 131, the displacement monitoring unit 131 is disposed on the insulating pull rod of the circuit breaker 11, and the displacement monitoring unit 131 is electrically connected to the comprehensive diagnosis and analysis module 150.

The displacement monitoring unit 131 is configured to monitor the opening and closing displacement and the opening and closing time of the circuit breaker 11 in real time, and indirectly detect the speed of opening and closing through the monitored opening and closing time and the opening and closing displacement.

Optionally, the displacement monitoring unit 131 is an infrared displacement sensor.

In addition, whether the contact 13 has poor alignment, the insertion depth of the contact 13, and whether various guide rails in the high-voltage switch cabinet 10 have jamming can be detected through the displacement monitoring unit 131.

Optionally, referring to fig. 2, the intelligent measurement and control terminal 100 further includes an anti-false-locking control module 160, configured to implement a five-prevention-locking function of the circuit breaker 11 and the ground switch 12 in the high-voltage switch cabinet 10.

Wherein, the five-prevention locking function is to prevent the circuit breaker from being opened and closed by mistake; the isolating switch is prevented from being pulled and closed under the load; the earth wire is prevented from being hung in a charged state, or the grounding switch is prevented from being hung in a charged state; preventing the grounding wire from connecting the isolating switch; prevent the wrong entering into the electrified interval.

Wherein, the operation of circuit breaker 11 and earthing switch 12 must satisfy the high tension switchgear and prevent mistake shutting requirement: on the basis of the traditional mechanical anti-misoperation locking function, a logic function that an electric quick grounding switch operation control unit (namely the anti-misoperation locking control module 160) is consistent with the anti-misoperation locking function of the switch cabinet is added, and the mechanical anti-misoperation locking function of the grounding switch and the cabinet body is prior. The electric quick grounding switch can be operated manually and electrically respectively, and the manual operation and the electric operation are switched automatically and are locked mutually.

Optionally, the intelligent measurement and control terminal 100 further includes an ambient temperature and humidity monitoring unit 170, and the ambient temperature and humidity monitoring unit 170 is electrically connected to the comprehensive diagnosis and analysis module 150 and is configured to monitor the ambient temperature and humidity in the high-voltage switch cabinet 10.

The environment temperature and humidity monitoring unit 170 may be an environment temperature and humidity sensor, may be disposed at a position of a heater, a fan, or the like in the high-voltage switch cabinet 10, and is configured to monitor environment temperature and humidity information in the high-voltage switch cabinet 10 in real time and send the information to the comprehensive diagnosis and analysis module 150, the comprehensive diagnosis and analysis module 150 compares the environment temperature and humidity information monitored in real time with a preset temperature and humidity value, when the environment temperature and humidity information exceeds a preset temperature and humidity value by a certain multiple, for example, 2 times, it may be considered that the temperature and humidity value in the high-voltage switch cabinet 10 is abnormal, and send the abnormal information to the monitoring host 200, and the monitoring host 200 sends alarm information.

EXAMPLE III

The third embodiment of the invention also provides a high-voltage switch cabinet, which comprises the high-voltage switch cabinet fault diagnosis system in any embodiment of the invention.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.