CN114362090B - Intelligent high-explosive switch for internet of things - Google Patents
Intelligent high-explosive switch for internet of things Download PDFInfo
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- CN114362090B CN114362090B CN202210052406.9A CN202210052406A CN114362090B CN 114362090 B CN114362090 B CN 114362090B CN 202210052406 A CN202210052406 A CN 202210052406A CN 114362090 B CN114362090 B CN 114362090B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
Abstract
The invention provides an intelligent Internet of things high-voltage switch, which comprises an explosion-proof shell arranged on a base, wherein a front cavity and a rear cavity are arranged in the explosion-proof shell, primary equipment, a protector and a circuit breaker are arranged in the front cavity, the protector is connected with the primary equipment and the circuit breaker, the rear cavity comprises a wiring cavity and a grounding knife cavity, a cable connector is arranged in the wiring cavity, a grounding knife is arranged in the grounding knife cavity, the intelligent Internet of things high-voltage switch also comprises an Internet of things communication manager, a thermal imager, a temperature and humidity sensor, a heating and dehumidifying device and a plurality of temperature measuring sensors which are respectively arranged on each contact of the circuit breaker and the cable connector.
Description
Technical Field
The invention belongs to the technical field of coal mine power grids, and particularly relates to an intelligent Internet of things high-explosive switch.
Background
At present, a mining explosion-proof and intrinsically safe high-voltage vacuum power distribution device (hereinafter referred to as a high-voltage explosion switch) is essential switch equipment for underground power supply of a coal mine, and generally comprises primary equipment (a voltage transformer (PT), a Current Transformer (CT) and a zero-sequence current transformer), a protector and a circuit breaker, wherein the circuit breaker comprises a closing loop, a closing actuating mechanism, an opening loop, an opening actuating mechanism, a non-voltage release tripping loop, a tripping actuating mechanism, a circuit breaker trolley and the like. The high-explosion switch is used for realizing power failure and power transmission of power supply equipment; once the electric leakage or short circuit and other faults occur on the load side of the electric equipment, a protector in the high-explosion switch detects the faults and sends a fault tripping command to enable the switch to be tripped off to remove the faults.
However, the traditional high-explosion switch cannot carry out intelligent analysis and diagnosis, cannot predict and early-warning the hidden trouble of the fault in advance, and is not beneficial to troubleshooting:
1. for a high-explosion switch, once the breaking capacity of the switch is reduced or a mechanism fails to operate, when short-circuit fault occurs, the switch per se can slowly remove the fault or can not remove the fault, so that the superior or superior switch is bound to trip, and the condition of override trip occurs, at present, off-line monitoring can be performed only through external detection equipment, and the condition that the simulated voltage and current are normal in an off-line state is greatly different from the condition in real fault;
2. can't carry out intelligent dehumidification to inside: the high explosion switch is internally closed, when the humidity exceeds a certain degree, the solid insulation surface can continuously absorb moisture and form a water film, ions contained in water can move along the insulation surface in an electric field and form accumulation near an electrode, so that the local electric field intensity is increased, discharge occurs and causes the reduction of the surface flashover voltage, the more serious the moisture absorption is, the more the surface flashover voltage is reduced, the discharge along the insulation surface can cause the insulation surface to be locally overheated to carbonize and accompanied with strong discharge sound and arc odor, and finally, the relative and interphase short circuit fault can be caused, thereby generating a serious electrical accident.
3. Failure diagnosis cannot be performed based on the contact condition of each contact and cable joint of the circuit breaker:
when the circuit breaker trolley is not in place, the contact of the contact is not reliable or the joint of the high-voltage cable is not fixed and reliable, certain impedance exists, the temperature of the contact and the temperature of the cable head can rise sharply due to long-time work, the moving contact, the static contact and the cable joint are caused to discharge, arc discharge short circuit or arc grounding is caused, faults are caused, and accidents and power failure are caused.
Disclosure of Invention
Based on this, to the technical problem, provide a high explosive switch of intelligent thing networking that can carry out analysis and diagnosis to the trouble.
The technical scheme adopted by the invention is as follows:
an intelligent Internet of things high-voltage switch comprises an explosion-proof shell arranged on a base, wherein a front cavity and a rear cavity are arranged in the explosion-proof shell, primary equipment, a protector and a circuit breaker are arranged in the front cavity, the protector is connected with the primary equipment and the circuit breaker, the rear cavity comprises a wiring cavity and a ground cutter cavity, a cable connector is arranged in the wiring cavity, and a ground cutter is arranged in the ground cutter cavity;
the protector is configured to:
(1) Performing on-line diagnosis on breaking capacity of the breaker:
in the process of commanding the breaker to execute opening, calculating the time t1 from the time when the protector sends an opening command to the breaker to the time when the protector detects that the breaker completes opening;
calculating the opening time T = T1-T2 of the circuit breaker, wherein T2 is preset time and represents the time from the time when the protector sends an opening command to the circuit breaker to the time when the circuit breaker receives the opening command;
if T is less than or equal to the time threshold, the breaking capacity of the circuit breaker is normal, and if T is greater than the time threshold, the breaking capacity of the circuit breaker is abnormal;
(2) Carrying out intelligent dehumidification:
determining the humidity in the front cavity through the temperature and humidity sensor, and if the humidity is greater than a first humidity threshold value, commanding the heating and dehumidifying device to dehumidify until the humidity is smaller than a second humidity threshold value;
in the dehumidification process, the temperature of a front cavity is determined through the temperature and humidity sensor, and if the temperature of the front cavity is greater than a first temperature threshold value, the heating dehumidification device is instructed to stop dehumidification;
(3) And fault diagnosis based on the contact condition of each contact and cable joint of the circuit breaker:
determining the temperature of each contact of the circuit breaker through a temperature sensor or a thermal imager, determining the temperature of a cable joint through the temperature sensor, and determining the maximum temperature value;
and if the temperature maximum value is larger than a second temperature threshold value, commanding the circuit breaker to perform opening.
The intelligent Internet of things high-explosion switch can perform online diagnosis on the breaking capacity of the circuit breaker, perform intelligent dehumidification, perform fault diagnosis based on the contact condition of each contact and cable joint of the circuit breaker, is favorable for fault removal, and has high safety.
Drawings
The invention is described in detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic diagram of the on-line diagnosis of the breaking capacity of the circuit breaker.
Detailed Description
As shown in fig. 1, an embodiment of the present specification provides an intelligent internet of things high explosive switch, which includes an explosion-proof housing 1100 disposed on a base.
The front cavity 1110 is internally provided with a primary device 1111, a protector 1112, a circuit breaker 1113, an internet of things communication manager 1114, a thermal imager 1115, a temperature and humidity sensor 1116, a heating and dehumidifying device 1117, an arc sensor 1118, an ultrasonic sensor 1119, an intelligent display 1198 and an intrinsically safe power supply 1199.
A cable connector is arranged in the wiring cavity 1120, a ground knife 1131 is arranged in the ground knife cavity 1130, and a gateway 1141 for accessing external data, an Ethernet intrinsically safe isolation module 1142 and a 5G communication module 1143 are arranged in the intrinsically safe cavity 1140.
Each contact and cable joint of the breaker 1113 is provided with a temperature sensor 1150.
The primary device 1111 includes a primary voltage transformer, a primary current transformer, and a zero-sequence current transformer, which are all connected to the protector 1112.
Protector 1112 is connected with circuit breaker 1113, thing networking communication manager 1114, heating dehydrating unit 1117 and intelligent display 1198.
The breaker 1113 includes a closing execution loop, a closing mechanism connected to the closing execution loop, an opening mechanism connected to the opening execution loop, a no-voltage tripping execution loop, a tripping mechanism connected to the no-voltage tripping execution loop, and an electric trolley, where the closing execution loop, the opening execution loop, the no-voltage tripping execution loop, and the electric trolley are all connected to the protector 1112.
The thermal imager 1115, the temperature and humidity sensor 1116, the arc sensor 1118, the ultrasonic sensor 1119 and the temperature sensor 1150 are all connected with the internet of things communication manager 1114.
The gateway 1141 is connected with the ethernet intrinsic safety isolation module 1142 and the internet of things communication manager 1114, and is powered by the intrinsic safety power supply 1199, and the ethernet intrinsic safety isolation module 1142 is connected with the 5G communication module 1143.
The primary voltage transformer converts external three-phase power supply 6KV/10KV into three-phase power supply 100V inside the high-voltage explosion switch, and the protector 1112 collects the three-phase power supply 100V to judge the integrity of the system power supply voltage and whether the power supply system is overvoltage or undervoltage and the like.
The primary current transformer converts a load current signal supplied by the high-explosion switch into a current signal with the secondary rated current of 5A through the primary current transformer (the transformation ratio is 50/5-1250/5), and the protector 1112 is used for acquiring two-phase or three-phase current to judge whether the system is normally supplied and whether the power supply system is short-circuited, overcurrent, overload and the like.
The zero sequence current transformer is used for converting a three-phase cable supplied by a high-voltage switch into a secondary voltage signal after penetrating through a primary zero sequence current transformer (1A/100 MV), and whether the system is normally supplied with power, whether the power supply system is grounded, leaks electricity and the like is judged by collecting leakage current and zero sequence voltage at three corners of an opening through a protector 1112.
After receiving a closing command from the protector 1112, the breaker 1113 starts closing, closes a closing execution loop, charges a closing coil, drives a closing mechanism to act, and closes a high-explosive switch; after receiving a brake-separating command or a protection tripping command of the protector 1112, starting brake separation, closing a brake-separating execution loop, electrifying a brake-separating coil, driving a brake-separating mechanism to act, and separating the brake by a high-explosive switch; when the protector 1112 detects that the external three-phase power supply 6KV/10KV is lower than a certain value, the voltage-loss tripping execution loop drives the tripping mechanism to open the brake, and the coal safety regulation is met.
Traditional mechanical mechanism dolly is replaced to electronic dolly, and when protector 1112 received remote control dolly's entering order or shaken out the order, the motor of drive electronic dolly shaken in the operating position or shaken out the test position, replaces traditional handcart manpower to pull out the dolly or push, is that it is essential to realize switch intellectuality and motorization.
The electric grounding knife replaces the driven pure manual ground wire that articulates, and when protector 1112 received the separating brake order or the closing command of the electric grounding knife of remote control, the motor of the electric grounding knife of drive closed a floodgate operation and separated brake operation, replaces the tradition to open the switch rear chamber lid, articulates the ground wire through the manpower, releases high tension cable's residual voltage, is that it is essential to realize switch intellectuality and electronization.
The temperature sensor 1150 is used to detect the temperature of the switch contacts and the cable joints, and a watchband type wireless temperature sensor can be used.
The thermal imager 1115 can adopt a dual-spectrum thermal imager and is used for monitoring the in-place condition of a breaker trolley and the opening and closing condition of an electric grounding knife, the contact condition of a plum blossom moving contact and a moving contact and the contact condition of a cable joint in real time, the temperature of the switch contact and the cable joint can be monitored in real time through dual-spectrum thermal imaging, the temperature of the whole irradiation area can be monitored, the temperature data can be displayed in the intelligent display 1198, and the real-time video monitoring and the thermal imaging temperature measurement in the local switch can be realized; meanwhile, the image video can be converted into a 5G wireless signal through the gateway 1141 and the 5G communication module 1143, and the 5G wireless signal is sent to the 5G communication wireless base station and further sent to the ground dispatching monitoring center, so that the internal state of the switch can be monitored in real time in the ground monitoring center.
The ultrasonic sensor 1119 is used for detecting the data of the partial discharge inside the switch, and the protector 1112 can monitor the partial discharge inside the switch according to the data of the partial discharge and is used for early detection of insulation damage in the switch, so that the protector 1112 can send an alarm or trip command to disconnect the switch and early warn.
The arc sensor 1118 detects a local arc discharge light or a short circuit arc light inside the switch, and the protector 1112 can send an alarm or a trip command according to the intensity of the detected arc light, disconnect the switch, early warn and prevent fault amplification.
The temperature and humidity sensor 1116 is used to detect the humidity and temperature in the front cavity 1110.
The internet of things communication manager 1114 is configured to converge detection data of the mining internet of things sensors (the thermal imager 1115, the temperature and humidity sensor 1116, the arc light sensor 1118, the ultrasonic sensor 1119, and the temperature measurement sensor 1150) and external detection data from the gateway 1141, and further transmit the detection data to the protector 1112.
The gateway 1141 is a common gateway or an intelligent communication management gateway, in a coal mine underground substation or a distribution point, the intelligent communication management gateway CAN be arranged in a high-explosion switch to be a gateway of the internet of things, other high-explosion switches only need to be arranged in the common gateway, and other switches CAN be sequentially connected to the gateway of the internet of things through respective gateways in series, wherein the gateways between the switches are connected through a butt plug supporting RS485, CAN, ethernet and optical fiber communication, meanwhile, an external detection device of a third party manufacturer of the substation or the distribution point CAN also be connected to the gateway of the internet of things through the butt plug, so that internal detection data of the high-explosion switch with the common gateway and detection data of the external detection device of the third party manufacturer of the substation or the distribution point CAN be gathered to the gateway of the internet of things, and the gateway is connected into a 5G common network or a 5G private network through the access of the gateway, so that access and monitoring of intelligent data of all the high-explosion switches in the pit CAN be realized, and construction problems of disordered and on-site control of the substation caused by a junction box in the prior art are avoided.
The gateway 1141 is connected to the ethernet intrinsically safe isolation module 1142 through an ethernet interface, and outputs intrinsically safe ethernet signals after isolating non-intrinsically safe ethernet signals, and then is connected to the 5G communication module 1143.
Intrinsic safe power supply 1199 converts the power supplied by the non-intrinsic safe power supply in the front cavity to intrinsic safe power supply for the intrinsic safe cavity.
The intelligent display 1198 communicates with the protector 1112 through an ethernet interface to realize man-machine interaction, and displays data (voltage, current, power and the like) sampled by the protector 1112, such as information, fault information, protection setting values and the like, and various data of the sensor such as video data, temperature measurement data and the like in real time to realize local real-time monitoring, visualization and electric operation.
The infrared remote controller 1160 is used in cooperation with a human-computer interface of the intelligent display 1198, so that various data can be checked on site, local real-time monitoring can be realized, such as fault record, temperature and humidity data, arc light data, video monitoring and thermal imaging, and data such as mechanical characteristics of a high-explosion switch can be inquired, and other operations, such as fixed value acquisition and modification, can be performed.
The protector 1112 is configured to:
(1) Performing on-line diagnosis on breaking capacity of the breaker:
in the process of commanding the breaker 1113 to perform opening, as shown in fig. 2, the time t1 from the time when the protector 1112 sends an opening command to the breaker 1113 through the opening outlet to the time when the protector 1112 detects that the breaker 1113 completes opening is calculated, due to the effect of the auxiliary contacts in the breaker 1113, in a closing state, the switch on signal is 1, the switch off signal is 0, the breaker 1113 performs opening after receiving the opening command, the protector 1112 can detect that the switch on signal is changed from 1 to 0, and at the same time, the switch off signal is changed from 0 to 1, which means that the protector 1112 detects that the breaker 1113 completes opening.
The opening time T = T1-T2 of the breaker 1113 is calculated, and T2 is a preset time (which can be measured in advance, for example, 8 ms) representing the time from when the protector 1112 issues an opening command to the breaker 1113 through the opening outlet to when the breaker 1113 receives the opening command. The opening speed of the circuit breaker determines the mechanical characteristic breaking capacity of the switch, and the opening time of the circuit breaker is the embodiment of the opening speed of the circuit breaker.
If T is less than or equal to the time threshold (such as 80 ms), the breaking capacity of the circuit breaker is normal, and if T is greater than the time threshold, the breaking capacity of the circuit breaker is abnormal.
In an actual usage scenario, the protector 1112 will command the breaker 1113 to perform the opening under two conditions, one is normal remote control opening, and the other is fault (short circuit or leakage) tripping.
For the situation of normal remote control brake opening, calculating a value T 'of T1-T2 and recording T' when the brake opening is normally controlled remotely each time; when the diagnosis is triggered (artificially triggered or periodically triggered), a plurality of T' (such as 3) closest to the current time are taken from the record, and the average value is calculated to be the switching-off time T; if T is greater than the time threshold, representing that the breaking capacity of the breaker is abnormal, prompting and alarming: please service the switch or replace the switch breaker.
For the situation of fault tripping, different from normal remote control switching-off, timely judgment is needed, so that the judgment needs to be carried out in real time according to switching-off time T = T1-T2 in the switching-off process, if T > time threshold, the breaking capacity of the circuit breaker is abnormal, and prompt and alarm are carried out: please service the switch or replace the switch breaker.
(2) Carrying out intelligent dehumidification:
the humidity within the front chamber 1110 is determined by the temperature and humidity sensor 1116, and if the humidity > a first humidity threshold (e.g., 70% rh, which typically causes a malfunction by air-induced gap discharge within the chamber when the humidity exceeds 70% rh), the heating and dehumidifying device 1117 is commanded to dehumidify and an alarm is raised that the humidity within the switch chamber is too high until the humidity is less than a second humidity threshold (e.g., 50% rh).
During dehumidification, the front cavity temperature is determined by the temperature and humidity sensor 1116, and if the front cavity temperature is greater than the first temperature threshold (70 ℃), the heating and dehumidifying device 1117 is commanded to stop dehumidification.
The humidity detection values of the temperature and humidity sensor 1116 may be periodically obtained a plurality of times (for example, 1 time per 1 second, 5 times of humidity detection values: hx1, hx2, hx3, hx4, hx 5), and an average value may be calculated as the humidity in the front chamber ((Hx 1+ Hx2+ Hx3+ Hx4+ Hx 5)/5), and the temperature detection values of the temperature and humidity sensor 1116 may be periodically obtained a plurality of times (for example, 1 time per 1 second, 5 times of temperature detection values: tx1, tx2, tx3, tx4, tx 5), and an average value may be calculated as the front chamber temperature ((Tx 1+ Tx2+ Tx3+ Tx4+ Tx 5)/5), which is more accurate.
(3) Fault diagnosis based on contact conditions of each contact and cable joint of breaker 1113:
the temperature of each contact of the circuit breaker is determined by a temperature sensor 1150 or a thermal imager 1115, and the temperature of the cable joint is determined by the temperature sensor 1150, from which the maximum temperature value is determined.
The temperatures of the contacts of the circuit breaker and the cable joints can be obtained periodically for multiple times (such as 1 time in 1 second and 3 times), the maximum temperatures (Tmax 1, tmax2 and Tmax 3) are obtained from the temperatures, and the average value of the maximum temperatures is calculated as the maximum temperature value ((Tmax 1+ Tmax2+ Tmax 3)/3), so that the accuracy is higher.
If the maximum temperature value is larger than a third temperature threshold (for example, 70 ℃, fault accidents can be caused when the maximum temperature value exceeds the third temperature threshold), the circuit breaker is commanded to execute opening, and a prompt alarm is given: trip at over-temperature, please overhaul.
In addition, the protector 1112 can also sample, calculate and protect the voltage, current, zero sequence current and the like in the high-explosion switch; and the switching-off and switching-on operations are controlled for the short circuit of the switch, the electric trolley is controlled to swing in and out, and the switching-off and switching-on operations are controlled for the electric ground knife.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (9)
1. An intelligent Internet of things high-explosive switch comprises an explosion-proof shell arranged on a base, wherein a front cavity and a rear cavity are formed in the explosion-proof shell, primary equipment, a protector and a circuit breaker are arranged in the front cavity, the protector is connected with the primary equipment and the circuit breaker, the rear cavity comprises a wiring cavity and a ground cutter cavity, a cable joint is arranged in the wiring cavity, and a ground cutter is arranged in the ground cutter cavity;
the protector is configured to:
(1) Performing on-line diagnosis on breaking capacity of the breaker:
in the process of commanding the breaker to execute opening, calculating the time t1 from the time when the protector sends an opening command to the breaker to the time when the protector detects that the breaker completes opening;
calculating the opening time T = T1-T2 of the circuit breaker, wherein T2 is preset time and represents the time from the time when the protector sends an opening command to the circuit breaker to the time when the circuit breaker receives the opening command;
if T is less than or equal to the time threshold, the breaking capacity of the circuit breaker is normal, and if T is greater than the time threshold, the breaking capacity of the circuit breaker is abnormal;
(2) Carrying out intelligent dehumidification:
determining the humidity in the front cavity through the temperature and humidity sensor, and if the humidity is greater than a first humidity threshold value, commanding the heating and dehumidifying device to dehumidify until the humidity is smaller than a second humidity threshold value;
in the dehumidification process, the temperature of a front cavity is determined through the temperature and humidity sensor, and if the temperature of the front cavity is greater than a first temperature threshold value, the heating dehumidification device is instructed to stop dehumidification;
(3) And fault diagnosis based on the contact condition of each contact and cable joint of the circuit breaker:
determining the temperature of each contact of the circuit breaker through a temperature sensor or a thermal imager, determining the temperature of a cable joint through the temperature sensor, and determining the maximum temperature value;
and if the maximum temperature value is larger than a third temperature threshold value, commanding the breaker to execute opening.
2. The intelligent Internet of things high-explosive switch according to claim 1, wherein the rear cavity further comprises an intrinsic safety cavity, a gateway for accessing external data, an Ethernet intrinsic safety isolation module and a 5G communication module are arranged in the intrinsic safety cavity, the gateway is connected with the Ethernet intrinsic safety isolation module and the Internet of things communication manager, and the Ethernet intrinsic safety isolation module is connected with the 5G communication module.
3. The intelligent internet of things high-explosive switch according to claim 2, wherein the gateway is a common gateway or an intelligent communication management gateway.
4. The intelligent Internet of things high-explosive switch according to claim 3, wherein an arc sensor and an ultrasonic sensor are further arranged in the front cavity, and both the arc sensor and the ultrasonic sensor are connected with the Internet of things communication management machine.
5. The intelligent internet of things high-explosive switch according to claim 3, wherein the on-line diagnosis of the breaking capacity of the breaker further comprises:
calculating a value T 'of T1-T2 when the brake is normally opened by remote control each time, and recording the T';
when the diagnosis is triggered, a plurality of T' closest to the current time are taken from the records, and the average value is calculated to be used as the switching-off time T;
and if T is greater than the time threshold, indicating that the breaking capacity of the circuit breaker is abnormal, and prompting and alarming.
6. The intelligent internet of things high-explosive switch according to claim 5, wherein the intelligent dehumidification further comprises:
acquiring humidity detection values of the temperature and humidity sensors periodically and repeatedly, calculating an average value as the humidity in the front cavity, commanding the heating and dehumidifying device to dehumidify if the humidity is greater than a first humidity threshold value, and prompting and alarming until the humidity is smaller than a second humidity threshold value;
in the dehumidification process, temperature detection values of the temperature and humidity sensor are obtained periodically for multiple times, an average value is calculated to serve as the front cavity temperature, and if the front cavity temperature is larger than a first temperature threshold value, the heating dehumidification device is instructed to stop dehumidification.
7. The intelligent internet of things high-explosive switch according to claim 6, wherein the fault diagnosis based on the contact condition of each contact and cable joint of the circuit breaker further comprises:
the temperature of each contact of the circuit breaker and the temperature of each cable connector are obtained periodically for multiple times, the maximum temperature is obtained from the temperatures each time, and the average value of the maximum temperatures is calculated to be used as the maximum temperature value;
and if the maximum temperature value is larger than a second temperature threshold value, commanding the circuit breaker to execute opening and giving an alarm.
8. The intelligent internet of things high-explosive switch according to claim 7, wherein the primary equipment comprises a primary voltage transformer, a primary current transformer and a zero-sequence current transformer, and the primary voltage transformer, the primary current transformer and the zero-sequence current transformer are all connected with the protector.
9. The intelligent internet of things high-voltage explosion switch according to claim 8, further comprising an intelligent display, an infrared remote controller matched with the intelligent display, and an intrinsic safety power supply used for converting power supply of a non-intrinsic safety power supply in the front cavity into the intrinsic safety power supply for supplying power to the intrinsic safety cavity, wherein the intelligent display and the intrinsic safety power supply are both arranged in the front cavity, the intelligent display is connected with the protector, and the intrinsic safety power supply is connected with the gateway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210052406.9A CN114362090B (en) | 2022-01-18 | 2022-01-18 | Intelligent high-explosive switch for internet of things |
Applications Claiming Priority (1)
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| CN114759525A (en) * | 2022-04-25 | 2022-07-15 | 山东博诚电气有限公司 | Protection method and device for mining explosion-proof and intrinsically safe combined frequency converter |
| CN115951114B (en) * | 2023-01-17 | 2023-06-23 | 上海山源电子科技股份有限公司 | Current signal identification method in power supply monitoring system |
| CN116345410A (en) * | 2023-02-07 | 2023-06-27 | 泰安众诚自动化设备股份有限公司 | Mining intrinsically safe high-voltage switch protection controller |
| CN115980568B (en) * | 2023-03-21 | 2023-06-13 | 浙江大华技术股份有限公司 | Circuit breaker state detection method and device and circuit breaker |
| CN116826971B (en) * | 2023-07-03 | 2024-01-30 | 联科信达物联网有限公司 | Intelligent electricity management system based on cloud control circuit breaker |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244416A (en) * | 2010-11-16 | 2011-11-16 | 江苏科技大学 | Intelligent cubicle switchboard oriented to intelligent power grid and operating and controlling method thereof |
| CN103457351A (en) * | 2013-02-28 | 2013-12-18 | 南京亚电电力设备有限公司 | Integrated switch cabinet intelligent operating system |
| CN110112701A (en) * | 2019-05-23 | 2019-08-09 | 江苏觅丹智能电器有限公司 | Embedded intelligent breaker |
| CN110379652A (en) * | 2019-07-18 | 2019-10-25 | 湖南长高高压开关集团股份公司 | A kind of integrated intelligent isolating switch mechanism case |
| CN209659012U (en) * | 2019-05-25 | 2019-11-19 | 北京普锐电子有限公司 | A kind of Internet of Things low-voltage intelligent circuit breaker and its things system |
| CN113852203A (en) * | 2021-09-29 | 2021-12-28 | 许昌许继软件技术有限公司 | Intelligent switch cabinet based on internet of things terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7697250B2 (en) * | 2006-07-14 | 2010-04-13 | William Davison | Switch-to-trip point translation |
-
2022
- 2022-01-18 CN CN202210052406.9A patent/CN114362090B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244416A (en) * | 2010-11-16 | 2011-11-16 | 江苏科技大学 | Intelligent cubicle switchboard oriented to intelligent power grid and operating and controlling method thereof |
| CN103457351A (en) * | 2013-02-28 | 2013-12-18 | 南京亚电电力设备有限公司 | Integrated switch cabinet intelligent operating system |
| CN110112701A (en) * | 2019-05-23 | 2019-08-09 | 江苏觅丹智能电器有限公司 | Embedded intelligent breaker |
| CN209659012U (en) * | 2019-05-25 | 2019-11-19 | 北京普锐电子有限公司 | A kind of Internet of Things low-voltage intelligent circuit breaker and its things system |
| CN110379652A (en) * | 2019-07-18 | 2019-10-25 | 湖南长高高压开关集团股份公司 | A kind of integrated intelligent isolating switch mechanism case |
| CN113852203A (en) * | 2021-09-29 | 2021-12-28 | 许昌许继软件技术有限公司 | Intelligent switch cabinet based on internet of things terminal |
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