阅读说明：本技术 一种全息感知型开关柜 (Holographic perception type cubical switchboard ) 是由 杜仲江 宋佳龙 窦亮 宋雨浓 于 2021-09-30 设计创作，主要内容包括：本发明涉及一种全息感知型开关柜,各温度传感器设置在各梅花触头处检测梅花触头的温度,并将温度发送至智能控制装置；智能控制装置判断温度是否在正常工作温度范围内；如果不在正常工作温度范围内,则令分闸传感器发送分闸指令给传动机构,以使传动机构断开与温度传感器对应的真空灭弧室；如果在正常工作温度范围内,则令合闸传感器发送合闸指令给传动机构,以使传动机构闭合与温度传感器对应的真空灭弧室,实现在线监测设备的绝缘状态,避免高压开关柜在运行中发生严重的事故。(The invention relates to a holographic sensing type switch cabinet.A temperature sensor is arranged at each plum blossom contact to detect the temperature of the plum blossom contact and send the temperature to an intelligent control device; the intelligent control device judges whether the temperature is within a normal working temperature range; if the temperature sensor is not in the normal working temperature range, the opening sensor sends an opening instruction to the transmission mechanism so that the transmission mechanism disconnects the vacuum arc-extinguishing chamber corresponding to the temperature sensor; if the temperature of the high-voltage switch cabinet is within the normal working temperature range, the switching-on sensor sends a switching-on instruction to the transmission mechanism, so that the transmission mechanism closes the vacuum arc-extinguishing chamber corresponding to the temperature sensor, the insulation state of the on-line monitoring equipment is realized, and serious accidents of the high-voltage switch cabinet in the running process are avoided.)

1. A holographic sensing type switch cabinet, characterized in that, the switch cabinet includes:

the intelligent control system comprises 3 temperature sensors, an intelligent control device, a vacuum circuit breaker, 3 upper connecting busbars, 3 inter-cabinet connecting busbars, 3 lower connecting busbars, 3 current transformers, 3 switch cabinet static contacts and 3 cable inlet wires; wherein, vacuum circuit breaker includes: the device comprises 3 upper contact arms, 3 lower contact arms, 3 vacuum arc-extinguishing chambers, 3 flexible connections, 3 tulip contacts, a transmission mechanism, a switching-off sensor and a switching-on sensor; the intelligent control device is respectively connected with the temperature sensors, the switching-off sensors and the switching-on sensors, and the switching-off sensors and the switching-on sensors are respectively connected with the 3 vacuum arc-extinguishing chambers through the transmission mechanism;

generating 3 conductive loops in total; the system comprises a cabinet, a switch cabinet, an inter-cabinet connecting bus, an upper connecting bus, a switch cabinet static contact, an upper contact arm, a vacuum arc extinguish chamber, a flexible connection, a lower contact arm, a lower connecting bus, a current transformer and a cable incoming line, wherein the upper contact arm, the lower connecting bus, the current transformer and the cable incoming line are sequentially connected and conducted to form a conductive loop;

each temperature sensor is arranged at each tulip contact and used for detecting the temperature of the tulip contact and sending the temperature to the intelligent control device; the intelligent control device judges whether the temperature is within a normal working temperature range; if the temperature sensor is not in the normal working temperature range, the opening sensor is enabled to send an opening instruction to the transmission mechanism, so that the transmission mechanism can cut off the vacuum arc-extinguishing chamber corresponding to the temperature sensor; and if the temperature is within the normal working temperature range, the switching-on sensor sends a switching-on instruction to the transmission mechanism so as to enable the transmission mechanism to close the vacuum arc-extinguishing chamber corresponding to the temperature sensor.

2. The holographic sensing switch cabinet of claim 1, further comprising:

the partial discharge sensor is arranged on the rear side of the cable chamber of the switch cabinet and used for detecting partial discharge electromagnetic wave signals;

the intelligent control device is connected with the partial discharge sensor and is used for judging whether a partial discharge electromagnetic wave signal is in a normal partial discharge working range; and if the current is not in the normal partial discharge working range, the intelligent control device displays abnormity and gives an alarm.

3. The holographic sensing type switch cabinet according to claim 2, wherein the intelligent control device is configured to determine whether the partial discharge electromagnetic wave signal is within a normal partial discharge operating range; if the working range is not within the normal partial discharge working range, the intelligent control device enables the opening sensor to send an opening instruction to the transmission mechanism, so that the transmission mechanism can disconnect 3 vacuum arc-extinguishing chambers; and if the working range is within the normal partial discharge working range, the intelligent control device enables the closing sensor to send a closing instruction to the transmission mechanism so as to enable the transmission mechanism to close 3 vacuum arc-extinguishing chambers.

4. The holographic sensing switch cabinet of claim 1, further comprising:

3 bus sensors which are respectively fixed on the lower connecting busbars and used for inducing incoming line current;

the intelligent control device is connected with each bus sensor and is used for judging whether each incoming line current is in a normal working current range or not; and if the current is not in the normal working current range, the intelligent control device displays abnormity and gives an alarm.

5. The holographic sensing type switch cabinet according to claim 4, wherein the intelligent control device is used for judging whether each incoming line current is within a normal working current range; if the current is not within the normal working current range, the intelligent control device enables the opening sensor to send an opening instruction to the transmission mechanism so that the transmission mechanism can cut off the vacuum arc-extinguishing chamber corresponding to the bus sensor; and if the current is within the normal working current range, the intelligent control device enables the closing sensor to send a closing instruction to the transmission mechanism so as to enable the transmission mechanism to close the vacuum arc-extinguishing chamber corresponding to the bus sensor.

6. The holographic sensing switch cabinet of claim 1, wherein the vacuum circuit breaker further comprises:

the energy storage motor is used for remotely electrically storing energy.

7. The holographic sensing switch cabinet of claim 1, further comprising:

the grounding switch is connected with the 3 conductive loops through the grounding connecting bar and is safely grounded when used for overhauling.

8. The holographic sensing switch cabinet of claim 1, further comprising:

3 lightning-arrest connecting bars and 3 arresters, each arrester is connected with each conductive loop through each lightning-arrest connecting bar.

9. The holographic sensing type switch cabinet according to claim 2, wherein the partial discharge sensor is in a "rectangular state", and two sides of the partial discharge sensor are provided with "bow" shaped snap-in type elastic pieces which are installed at the rear side of a cable chamber of the switch cabinet, the switch cabinet body is provided with a rectangular opening, when the partial discharge sensor is installed, the left and right sides of the partial discharge sensor are pinched to be in a vertical state, and after the installation is completed, the back surface automatically pops up to be in a "bow" shape to play a limiting role.

10. The holographic sensing switch cabinet of claim 2, further comprising:

and the 3 hose clamps are used for fixing the temperature sensor on the plum blossom contact.

Technical Field

The invention relates to the field of indoor high-voltage distribution equipment, in particular to a holographic sensing type switch cabinet.

Background

The operation reliability of core high-voltage elements such as a circuit breaker, a CT (computed tomography), a busbar, a cable and the like in the conventional high-voltage switch cabinet directly influences the normal production of the power industry. However, these devices are inevitably affected by various factors such as electricity, heat, machinery, and environment during operation, and their insulating media are continuously deteriorated, resulting in poor operation state, even various failures, causing local or large-area power outage, and causing huge direct or indirect economic loss.

The reasons for the reliability of the high-voltage switch cabinet and the deterioration of the insulating medium are more, so how to monitor the insulating state of the equipment on line and avoid serious accidents of the high-voltage switch cabinet in the running become problems to be solved urgently in the field.

Disclosure of Invention

The invention aims to provide a holographic sensing type switch cabinet to realize the insulation state of online monitoring equipment.

In order to achieve the above object, the present invention provides a holographic sensing type switch cabinet, comprising:

the intelligent control system comprises 3 temperature sensors, an intelligent control device, a vacuum circuit breaker, 3 upper connecting busbars, 3 inter-cabinet connecting busbars, 3 lower connecting busbars, 3 current transformers, 3 switch cabinet static contacts and 3 cable inlet wires; wherein, vacuum circuit breaker includes: the device comprises 3 upper contact arms, 3 lower contact arms, 3 vacuum arc-extinguishing chambers, 3 flexible connections, 3 tulip contacts, a transmission mechanism, a switching-off sensor and a switching-on sensor; the intelligent control device is respectively connected with the temperature sensors, the switching-off sensors and the switching-on sensors, and the switching-off sensors and the switching-on sensors are respectively connected with the 3 vacuum arc-extinguishing chambers through the transmission mechanism;

generating 3 conductive loops in total; the system comprises a cabinet, a switch cabinet, an inter-cabinet connecting bus, an upper connecting bus, a switch cabinet static contact, an upper contact arm, a vacuum arc extinguish chamber, a flexible connection, a lower contact arm, a lower connecting bus, a current transformer and a cable incoming line, wherein the upper contact arm, the lower connecting bus, the current transformer and the cable incoming line are sequentially connected and conducted to form a conductive loop;

each temperature sensor is arranged at each tulip contact and used for detecting the temperature of the tulip contact and sending the temperature to the intelligent control device; the intelligent control device judges whether the temperature is within a normal working temperature range; if the temperature sensor is not in the normal working temperature range, the opening sensor is enabled to send an opening instruction to the transmission mechanism, so that the transmission mechanism can cut off the vacuum arc-extinguishing chamber corresponding to the temperature sensor; and if the temperature is within the normal working temperature range, the switching-on sensor sends a switching-on instruction to the transmission mechanism so as to enable the transmission mechanism to close the vacuum arc-extinguishing chamber corresponding to the temperature sensor.

Optionally, the switch cabinet further comprises:

the partial discharge sensor is arranged on the rear side of the cable chamber of the switch cabinet and used for detecting partial discharge electromagnetic wave signals;

the intelligent control device is connected with the partial discharge sensor and is used for judging whether a partial discharge electromagnetic wave signal is in a normal partial discharge working range; and if the current is not in the normal partial discharge working range, the intelligent control device displays abnormity and gives an alarm.

Optionally, the intelligent control device is configured to determine whether the partial discharge electromagnetic wave signal is within a normal partial discharge working range; if the working range is not within the normal partial discharge working range, the intelligent control device enables the opening sensor to send an opening instruction to the transmission mechanism, so that the transmission mechanism can disconnect 3 vacuum arc-extinguishing chambers; and if the working range is within the normal partial discharge working range, the intelligent control device enables the closing sensor to send a closing instruction to the transmission mechanism so as to enable the transmission mechanism to close 3 vacuum arc-extinguishing chambers.

Optionally, the switch cabinet further comprises:

3 bus sensors which are respectively fixed on the lower connecting busbars and used for inducing incoming line current;

the intelligent control device is connected with each bus sensor and is used for judging whether each incoming line current is in a normal working current range or not; and if the current is not in the normal working current range, the intelligent control device displays abnormity and gives an alarm.

Optionally, the intelligent control device is configured to determine whether each incoming line current is within a normal operating current range; if the current is not within the normal working current range, the intelligent control device enables the opening sensor to send an opening instruction to the transmission mechanism so that the transmission mechanism can cut off the vacuum arc-extinguishing chamber corresponding to the bus sensor; and if the current is within the normal working current range, the intelligent control device enables the closing sensor to send a closing instruction to the transmission mechanism so as to enable the transmission mechanism to close the vacuum arc-extinguishing chamber corresponding to the bus sensor.

Optionally, the vacuum circuit breaker further comprises:

the energy storage motor is used for remotely electrically storing energy.

Optionally, the switch cabinet further comprises:

the grounding switch is connected with the 3 conductive loops through the grounding connecting bar and is safely grounded when used for overhauling.

Optionally, the switch cabinet further comprises:

3 lightning-arrest connecting bars and 3 arresters, each arrester is connected with each conductive loop through each lightning-arrest connecting bar.

Optionally, the partial discharge sensor is in a rectangular state, the two sides of the partial discharge sensor are provided with bow-shaped buckle type elastic pieces, the partial discharge sensor is installed on the rear side of a cable chamber of the switch cabinet, the switch cabinet body is provided with a rectangular opening, the left side and the right side of the partial discharge sensor are provided with bow-shaped buckle type elastic pieces to be pinched to be in a vertical state, and after installation is completed, the back of the partial discharge sensor automatically pops up to be in a bow shape to play a limiting role.

Optionally, the switch cabinet further comprises:

and the 3 hose clamps are used for fixing the temperature sensor on the plum blossom contact.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

the invention relates to a holographic sensing type switch cabinet.A temperature sensor is arranged at each plum blossom contact to detect the temperature of the plum blossom contact and send the temperature to an intelligent control device; the intelligent control device judges whether the temperature is within a normal working temperature range; if the temperature sensor is not in the normal working temperature range, the opening sensor sends an opening instruction to the transmission mechanism so that the transmission mechanism disconnects the vacuum arc-extinguishing chamber corresponding to the temperature sensor; if the temperature of the high-voltage switch cabinet is within the normal working temperature range, the switching-on sensor sends a switching-on instruction to the transmission mechanism, so that the transmission mechanism closes the vacuum arc-extinguishing chamber corresponding to the temperature sensor, the insulation state of the on-line monitoring equipment is realized, and serious accidents of the high-voltage switch cabinet in the running process are avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a three-view diagram of a holographic sensing type switch cabinet according to the present invention;

FIG. 2 is a schematic view of the internal structure of the holographic sensing type switch cabinet of the present invention;

fig. 3 is a view showing the outline of the vacuum circuit breaker according to the present invention;

fig. 4 is a structural view of an internal mechanism of the vacuum circuit breaker of the present invention;

FIG. 5 is a schematic diagram of the energy storage motor of the vacuum circuit breaker of the present invention;

FIG. 6 is a schematic diagram of an opening and closing sensor of the vacuum circuit breaker according to the present invention;

figure 7 is an outline view of the hose clamp of the present invention;

FIG. 8 is a schematic view of a temperature sensor according to the present invention;

FIG. 9 is a schematic diagram of a partial discharge sensor in accordance with the present invention;

FIG. 10 is a schematic view of a bus bar sensor according to the present invention;

FIG. 11 is a schematic diagram of an intelligent control device according to the present invention;

FIG. 12 is a wiring terminal layout behind the intelligent control of the present invention;

description of the symbols:

1. the switch cabinet, 2, vacuum circuit breaker, 3, inter-cabinet connection busbar, 4, upper connection busbar, 5, switch cabinet static contact, 6, upper and lower contact arms, 7, vacuum arc extinguish chamber, 8, flexible connection, 9, lower connection busbar, 10, current transformer, 11, partial discharge sensor, 12, lightning-protection connecting bar, 13, arrester, 14, cable inlet wire, 15, grounding connecting bar, 16, grounding switch, 17, separating brake sensor, 18, closing brake sensor, 19, energy storage motor, 20, intelligent control device, 21, plum blossom contact, 22, temperature sensor, 23, bus sensor, 24, hose clamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a holographic sensing type switch cabinet to realize the insulation state of online monitoring equipment.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

In fig. 1, (a) shows a front view of a holographic sensing switch cabinet, (b) in fig. 1 shows a left view of the holographic sensing switch cabinet, and (c) in fig. 1 shows a right view of the holographic sensing switch cabinet, as shown in fig. 1-2, the invention provides a holographic sensing switch cabinet, wherein the switch cabinet 1 comprises:

3 temperature sensor 22, intelligent control device 20, vacuum circuit breaker 2, 3 go up to connect female arranging 4, 3 inter-cabinet and connect female arranging 3, 3 down to connect female arranging 9, 3 current transformer 10, 3 cubical switchboard static contact 5 and 3 cable inlet wires 14. Wherein, vacuum circuit breaker 2 includes: the circuit breaker comprises 3 upper contact arms 6, 3 lower contact arms 6, 3 vacuum arc-extinguishing chambers 7, 3 flexible connections 8, 3 tulip contacts 21, a transmission mechanism (not shown in the figure), a switching-off sensor 17 and a switching-on sensor 18, and is particularly shown in figures 3-4, wherein the external structures of the switching-off sensor 17 and the switching-on sensor 18 are shown in figure 6, the switching-off sensor 17 sends a switching-off command through B1 and B2, and the switching-on sensor 18 sends a switching-on command through C1 and C2.

The intelligent control device 20 is respectively connected with the temperature sensors 22, the opening sensor 17 and the closing sensor 18, and the opening sensor 17 and the closing sensor 18 are respectively connected with the 3 vacuum arc-extinguishing chambers 7 through the transmission mechanism; an inter-cabinet connecting bus bar 3, an upper connecting bus bar 4, a switch cabinet static contact 5, an upper contact arm 6, a vacuum arc extinguish chamber 7, a flexible connection 8, a lower contact arm 6, a lower connecting bus bar 9, a current transformer 10 and a cable inlet wire 14 are sequentially connected and conducted to form a conductive loop. Since A, B and C phases are involved, 3 conductive loops are created.

Each temperature sensor 22 is arranged at each tulip contact 21, and the temperature sensor 22 is used for detecting the temperature of the tulip contact 21 and sending the temperature to the intelligent control device 20; the intelligent control device 20 judges whether the temperature is within the normal working temperature range; if the temperature is not within the normal working temperature range, the opening sensor 17 is enabled to send an opening instruction to the transmission mechanism, so that the transmission mechanism can open the vacuum arc-extinguishing chamber 7 corresponding to the temperature sensor 22; and if the temperature is within the normal working temperature range, enabling the closing sensor 18 to send a closing instruction to the transmission mechanism so as to enable the transmission mechanism to close the vacuum arc-extinguishing chamber 7 corresponding to the temperature sensor 22.

In this embodiment, the model of the temperature sensor 22 is QTWD-200k1, the model of the intelligent control device 20 is QT8000I, the vacuum circuit breaker 2 is a VS port-12 vacuum circuit breaker, the model of the static contact 5 of the switch cabinet is 8qt.kyn.008, and the model of the cable inlet wire 14 is 8 qt.kyn.008. The model of last arm 6 and lower arm 6 that touches is 8QT.VS1.001, and the model of vacuum interrupter 7 is 8QT.VS1.002, and the model of flexible coupling 8 is 8QT.VS1.003, and the model of plum blossom contact 21 is 8QT.VS1.004, and the model of separating brake sensor 17 is QTFQ, and the model of closing a floodgate sensor 18 is QTHQ.

The VS-12 vacuum circuit breaker is a handcart type circuit breaker and can be pulled out from the switch cabinet 1 for overhaul or replacement; when the vacuum circuit breaker 2 is pushed into the switch cabinet 11, as shown in fig. 2, the holographic sensing type switch cabinet 1 is divided into A, B, C three phases, from top to bottom, from left to right, and the connection mode is the same, as exemplified by phase a: the inter-cabinet connecting bus bar 3, the upper connecting bus bar 4, the switch cabinet static contact 5, the upper contact arm 6, the vacuum arc extinguish chamber 7, the flexible connection 8, the lower contact arm 6, the lower connecting bus bar 9, the current transformer 10 and the cable inlet wire 14 are sequentially connected and conducted to form a conductive loop. The phase B and the phase C respectively form a conductive loop, and the total number of the conductive loops is three.

As an alternative embodiment, the switch cabinet 1 of the present invention further includes: and the partial discharge sensor 11 is arranged at the rear side of the cable chamber of the switch cabinet 1 and is used for detecting partial discharge electromagnetic wave signals. The intelligent control device 20 is connected to the partial discharge sensor 11, and the intelligent control device 20 is configured to determine whether a partial discharge electromagnetic wave signal is within a normal partial discharge working range; if the current is not in the normal working range of the partial discharge, the intelligent control device 20 displays the abnormity and gives an alarm. Further, the intelligent control device 20 is configured to determine whether the partial discharge electromagnetic wave signal is within a normal partial discharge working range; if the working range is not within the normal partial discharge working range, the intelligent control device 20 enables the opening sensor 17 to send an opening instruction to the transmission mechanism, so that the transmission mechanism disconnects 3 vacuum arc-extinguishing chambers 7; if the working range is within the normal partial discharge working range, the intelligent control device 20 enables the closing sensor 18 to send a closing instruction to the transmission mechanism, so that the transmission mechanism closes the 3 vacuum arc-extinguishing chambers 7. The model of the partial discharge sensor 11 in this embodiment is QTJF-100PC, and an outline of the partial discharge sensor 11 is shown in fig. 9.

As an alternative embodiment, the switch cabinet 1 of the present invention further includes: and 3 bus sensors 23 are fixed on the lower connecting busbars 9 and used for sensing incoming line current. The intelligent control device 20 is connected with the bus sensor 23, and the intelligent control device 20 is used for judging whether the incoming line current is in a normal working current range; if the current is not in the normal working current range, the intelligent control device 20 displays abnormity and gives an alarm. Further, the intelligent control device 20 is configured to determine whether the incoming line current is within a normal operating current range; if the current is not within the normal working current range, the intelligent control device 20 enables the opening sensor 17 to send an opening instruction to the transmission mechanism, so that the transmission mechanism disconnects the vacuum arc-extinguishing chamber 7 corresponding to the bus sensor 23; if the current is within the normal working current range, the intelligent control device 20 enables the closing sensor 18 to send a closing instruction to the transmission mechanism, so that the transmission mechanism closes the vacuum arc-extinguishing chamber 7 corresponding to the bus sensor 23. In this embodiment, the bus bar sensor 23 is QTWD-200k 2. In this embodiment, each bus bar sensor 23 is fixed on each lower connecting bus bar 9 through a self-adhesive tape. The bus bar sensor 23 is as shown in fig. 10, and the bus bar sensor 23 outputs incoming current through F1 and F2.

The normal working current range, the normal partial discharge working range and the normal working temperature range disclosed by the invention can be subjected to parameter adjustment and setting according to project requirements. In the embodiment, the normal working current range is set to be 4.5-5.5A, the normal partial discharge working range is set to be 0-20PC, the normal working temperature range is set to be 30-60 degrees, and if the normal working current range exceeds the range, tripping is carried out to send a tripping signal.

As an alternative embodiment, the vacuum circuit breaker 2 of the present invention further includes: and the energy storage motor 19 is used for remotely electrically storing energy. In this embodiment, the model of the energy storage motor 19 is QTM. As shown in fig. 5, the energy storage motor 19 performs remote electric energy storage through a1, a 2.

As an alternative embodiment, the switch cabinet 1 of the present invention further includes: the grounding switch 16 is connected with the 3 conductive loops through the grounding connection bar 15, and when each conductive loop is disconnected, the grounding switch 16 is used for safely grounding during maintenance. In this embodiment, earthing switch 16's model is 2QT.JDK.001, earthing connector bank 15's model is 8 QT.KYN.009.

As an alternative embodiment, the switch cabinet 1 of the present invention further includes: 3 lightning-protection connecting bars 12 and 3 lightning arresters 13, the ith lightning arrester 13 is connected with the ith conductive loop through the ith lightning-protection connecting bar 12. i is 1, 2 and 3, the model of the lightning protection connecting bar 12 is 8QT.KYN.009, and the model of the lightning arrester 13 is HY5 WS-17/45. Once abnormal voltage occurs, the lightning arrester 13 acts to protect. When the device is operating at normal operating voltage, the arrester 13 is not active and is considered to be an open circuit to ground. Once high voltage occurs, the lightning arrester 13 acts immediately to guide high voltage impact current to the ground, so as to limit the voltage amplitude and play a role in protection.

As an optional implementation manner, the partial discharge sensor 11 of the present invention is in a "rectangular state", and two sides of the partial discharge sensor are provided with "bow" shaped snap-in type elastic pieces, and the partial discharge sensor is installed at the rear side of a cable chamber of the switch cabinet 1, the body of the switch cabinet 1 is provided with a rectangular opening, when the partial discharge sensor is installed, the left and right sides of the partial discharge sensor are pinched to be in a vertical state, and after the partial discharge sensor is installed, the back side of the partial discharge sensor automatically pops up to be in a "bow" shape, so as to perform a limiting function. The definition of partial discharge refers to that the insulation medium in the high-voltage electrical apparatus generates non-penetration discharge between the electrodes under the action of high electric field intensity. The partial discharge sensor 11 is developed according to the characteristic of partial discharge that pulse current and the like can be generated after the partial discharge is mastered, and the partial discharge of the conductive loop is monitored on line. When the holographic sensing switch cabinet 1 is in a power-on working state, partial discharge is less than 20pC according to national standard requirements, normal display is carried out on the intelligent device module, when the partial discharge exceeds 20pC, electromagnetic wave signals can be formed by partial discharge pulse current, the partial discharge sensor 11 receives strong signals, abnormal display is carried out on the intelligent device module, and an alarm is given. Based on the principle of "electromagnetic field", the partial discharge sensor 11 receives the ultrahigh frequency electromagnetic wave radiated in the partial discharge process, thereby realizing the detection of partial discharge. The partial discharge sensor 11 receives the discharge electromagnetic wave signal in the conductive loop of the switch cabinet 1, and outputs the discharge electromagnetic wave signal to the module of the intelligent control device 20 through E1 and E2, so that the intelligent control device 20 can judge whether to alarm or not.

As an alternative embodiment, the switchgear 1 of the present invention further comprises: the throat hoop 24 is used for fixing the temperature sensor 22 on the tulip contact 21, and the model of the throat hoop 24 is QTHG. The throat band 24 is shown in figure 7, and the temperature sensor 22 is fixed in figure 8. The hose clamp 24 is made of soft magnetic alloy and is a magnetic tape with a rectangular notch, a cylindrical nut is clamped at one end of the hose clamp, and the other end of the hose clamp is fastened through a screw to form a circle. The hose clamp 24 has good magnetic conductivity and can better perform induction electricity taking. The throat hoop 24 fixes the temperature sensor 22 on the tulip contact 21. The tulip contact 21 is a conductor which is directly meshed with a fixed contact when the vacuum circuit breaker 2 is pushed into the switch cabinet 1, and is a 'moving' and 'static' combination point and a weak point, so that the temperature sensor 22 is arranged on the plum blossom contact, and the state of a switch product can be reflected better; by adopting the transmission temperature signal, the operation temperature of the monitoring position can be accurately measured, and the on-line monitoring of the operation temperature of the switch cabinet 1 is realized. The temperature detected by the temperature sensor 22 is output to the smart controller 20 through D1 and D2, so that the smart controller 20 determines whether or not to alarm.

As shown in fig. 11, the intelligent control device 20 of the present invention transmits the data to a data center in the background through a communication protocol interface RS-485, a protocol 101 or 104, and a wireless module 3G/4G/5G/6G, so as to provide safety guarantee for the operation process of the switch cabinet 1, give an alarm when the data exceeds the range, find the operation defect of the switch cabinet 1 in time, provide a decision for evaluating the insulation level and the aging degree, and provide a powerful basis for the overhaul work of the switch cabinet 1.

As shown in fig. 12, a1, a2 are connected to A3, a4 of the intelligent control device 20 through electric wires; b1 and B2 are connected into a5 and a6 of the intelligent control device 20 through electric wires; c1 and C2 are connected into a7 and a8 of the intelligent control device 20 through electric wires; wherein a1 and a2 are communication protocol interfaces and are transmitted to a background data center through a communication protocol interface RS-485, a protocol 101 or 104 and a wireless module 3G/4G/5G/6G; the switch outputs signals a10 and a11 for protection switching-on; a12, a13 is protection trip; a14, a15 is a tripping signal; a16, a17 is alarm signal; a18, a19 is connected with a power supply; a20 is grounded; items A, B and C of the three sensors F1 and F2 are sequentially connected into B3, B4, B5, B6, B7 and B8; b1 and b2 are zero-sequence currents; d1, D2 three sensors, item A, item B and item C are sequentially connected into B10, B11, B12, B13, B14 and B15; e1, E2 access b19, b 20. B17, B18 and B19 are connected to a voltage reserve point.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to assist in understanding the core concepts of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.