CN116488334A - Intelligent fault monitoring system and method for power distribution equipment - Google Patents
Intelligent fault monitoring system and method for power distribution equipment Download PDFInfo
- Publication number
- CN116488334A CN116488334A CN202310418347.7A CN202310418347A CN116488334A CN 116488334 A CN116488334 A CN 116488334A CN 202310418347 A CN202310418347 A CN 202310418347A CN 116488334 A CN116488334 A CN 116488334A
- Authority
- CN
- China
- Prior art keywords
- alarm
- data
- power distribution
- sensor
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 22
- 108091006146 Channels Proteins 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 238000004904 shortening Methods 0.000 claims description 3
- 206010063385 Intellectualisation Diseases 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses an intelligent fault monitoring system and method for power distribution equipment, comprising a current acquisition circuit, a temperature acquisition circuit, an intelligent monitoring terminal and a plurality of sensors, wherein the sensors are connected with the current acquisition circuit and the temperature acquisition circuit and are used for taking current data information and temperature data information of the power distribution equipment and transmitting the temperature data information and the current data information to the intelligent monitoring terminal in a wireless communication mode; the intelligent monitoring terminal comprises a relay alarm output, the intelligent monitoring terminal receives temperature data information and current data information in real time and is provided with a current fault alarm range and a temperature overrun alarm threshold value, and when the received temperature data information and current data information exceed the current fault alarm range and the temperature overrun alarm threshold value, the relay alarm output gives an alarm. The fault monitoring system has the advantages of providing a perfect fault monitoring function, timely eliminating potential safety hazards, ensuring safe electricity utilization of users and providing safety guarantee for realizing the intellectualization and automation of the low-voltage distribution network.
Description
Technical Field
The invention relates to the field of fault detection of power distribution equipment, in particular to an intelligent fault monitoring system and method for power distribution equipment.
Background
In order to find and remove faults in time, safe and stable operation of the power system is ensured. The fault monitoring structure is arranged in the power distribution equipment circuit to monitor parameters such as current, voltage, temperature and the like in the circuit in real time, and an alarm is given or the circuit is cut off when an abnormal condition is found, so that electrical accidents are avoided. In addition, fault monitoring is also beneficial to improving the reliability and the operation efficiency of the power system and reducing the maintenance cost. However, in the prior art, the sensor is used for measuring and transmitting data at fixed time intervals, if the time intervals are short, the power consumption is larger than the accumulated energy, and the data cannot be transmitted to the terminal; if the time interval is long, fault information cannot be timely sent, and a reasonable anti-collision mechanism is not arranged, so that a high error rate can be caused.
Disclosure of Invention
The invention aims to: the invention aims to provide an intelligent fault monitoring system and method for power distribution equipment, which are used for monitoring temperature and current data information of the power distribution equipment on line in real time and displaying fault information of the power distribution equipment in time.
The technical scheme is as follows: in order to achieve the aim of the invention, the intelligent fault monitoring system of the power distribution equipment comprises a current acquisition circuit, a temperature acquisition circuit, an intelligent monitoring terminal and a plurality of sensors,
the sensor is connected with the current acquisition circuit and the temperature acquisition circuit and is used for acquiring current data information and temperature data information of power distribution equipment and transmitting the temperature data information and the current data information to the intelligent monitoring terminal in a wireless communication mode;
the intelligent monitoring terminal comprises a relay alarm output, the intelligent monitoring terminal receives temperature data information and current data information in real time and is provided with a current fault alarm range and a temperature overrun alarm threshold value, and when the received temperature data information and current data information exceed the current fault alarm range and the temperature overrun alarm threshold value, the relay alarm output gives an alarm.
Further, the intelligent monitoring terminal also comprises an alarm indicator lamp and an RS485 communication interface, wherein the alarm indicator lamp flashes or stops flashing at a certain frequency according to the on-off state of the alarm output of the relay; the RS485 communication interface uses a Modbus communication protocol, allows multiple power distribution devices to simultaneously transmit information, and is convenient for networking and information transmission.
Further, the wireless communication frequency is any free ISM frequency band of 300-348MHz,400-464MHz and 800-928MHz.
As a preferred embodiment of the present invention, the frequency of the wireless communication is 433MHz wireless.
Further, the electromagnetic energy collected by the sensor through the alternating current power-on line of the power distribution equipment is converted into electric energy to supply power for the sensor. And a single power supply is adopted for supplying power, so that the ultra-small integrated design is adopted, and the anti-interference capability is high.
As a preferred embodiment of the invention, the left side of the sensor circuit diagram is an alternating current input interface of the power distribution equipment, and electrolytic capacitors CE1 and CF1 are used for filtering and storing energy; the voltage stabilizer is used for outputting 3.3V to supply power for the sensor; the voltage detector provides an effective level output for the enable pin of the voltage regulator.
An intelligent fault monitoring method for power distribution equipment,
the sensor starts a low power consumption mode;
the sensor automatically adjusts the sampling interval according to the collected energy;
the sensor jumps out of a low-power consumption mode before sending data, carries out channel activity detection, and sends the data to the intelligent monitoring terminal when the channel is in an idle state; when the channel is in a busy state, carrying out random delay back-off, continuing to carry out channel activity detection, and carrying out data transmission when the channel is in an idle state;
the intelligent monitoring terminal receives the data and displays the data, judges whether the data is out of limit, and if the data is out of limit, the relay outputs an alarm;
and restarting the low-power consumption state after the sensor data transmission is completed, and storing redundant electric energy.
Further, the sensor starts a low-power consumption mode, and the sensor specifically further comprises a step of converting electromagnetic energy collected by an alternating current power-on line of the power distribution equipment into electric energy to supply power for the sensor, and when the alternating current passing through the sensor is more than 5A, the sensor starts to work and enters the low-power consumption working mode.
Further, the sensor automatically adjusts the sampling interval according to the collected energy; the more current passing through the sensor, the more energy is collected; when the energy is sufficient, shortening the data transmission time interval; and when the energy is insufficient, the data transmission time interval is prolonged.
Further, the sensor jumps out of a low power consumption mode before sending data, channel activity detection is carried out, and when the channel is in an idle state, the data is sent to the intelligent monitoring terminal; when the channel is in a busy state, carrying out random delay back-off, continuing to carry out channel activity detection, and carrying out data transmission when the channel is in an idle state; the method specifically further comprises the steps of judging whether the received signal strength of the wireless communication channel is lower than a set threshold value or not before data transmission, judging whether stronger signals are transmitted or have stronger interference in the channel or not by detecting the received signal strength in the bandwidth of the wireless communication channel, and carrying out data transmission only when the received signal strength is lower than the set threshold value.
Further, the intelligent monitoring terminal receives data and displays the data, judges whether the data is out of limit, if so, the relay alarm output gives an alarm, and particularly further comprises an alarm indicator lamp, wherein the intelligent monitoring terminal is provided with a current fault alarm range and a temperature out-of-limit alarm threshold, and if so, the relay alarm output timely outputs alarm information and the alarm indicator lamp flashes. And the accuracy of current and temperature data transmission is improved.
The beneficial effects are that: the intelligent fault monitoring system focuses on current fault monitoring and contact temperature monitoring of power distribution system operation equipment, provides perfect fault monitoring functions, grasps the equipment operation state by monitoring temperature, current and other data of cables and busbar on line in real time, eliminates potential safety hazards in time, ensures safe power utilization of users, and provides safety guarantee for realizing intelligent and automatic low-voltage distribution network.
By adopting a single power supply mode, only a power supply is needed to be provided for the intelligent monitoring terminal, the sensor does not need to be provided with a separate power supply, the ultra-small integrated design is realized, the anti-interference capability is strong, the electric energy loss is greatly reduced, and the cost is saved. The sensor automatically adjusts the sampling interval according to the amount of the collected energy, so that the circuit of the power distribution equipment stably and efficiently operates; and an anti-collision mechanism of the sensor is adopted, so that the accuracy rate of data transmission is improved.
Drawings
Fig. 1 is a block diagram of the structure of embodiment 1;
FIG. 2 is a circuit diagram of a sensor of example 1;
fig. 3 is a flowchart of the operation of example 2.
Detailed Description
Example 1
An intelligent fault monitoring system of power distribution equipment comprises a current acquisition circuit 1, a temperature acquisition circuit 2, an intelligent monitoring terminal 3 and a plurality of sensors 4,
the sensor 4 is connected with the current acquisition circuit 1 and the temperature acquisition circuit 2 and is used for adopting current data information and temperature data information of the power distribution equipment and transmitting the temperature data information and the current data information to the intelligent monitoring terminal 3 in a 433MHz wireless communication mode;
the intelligent monitoring terminal 3 comprises a relay alarm output 5, an alarm indicator lamp 6 and an RS485 communication interface 7, the intelligent monitoring terminal 3 is used for receiving temperature data information and current data information in real time, a current fault alarm range and a temperature overrun alarm threshold value are arranged, when the received temperature data information and current data information exceed the current fault alarm range and the temperature overrun alarm threshold value, the relay alarm output 5 gives an alarm, and the alarm indicator lamp 6 flashes or stops flashing at a certain frequency according to the on-off state of the relay alarm output 5; the RS485 communication interface 7 uses Modbus communication protocol, allows multiple power distribution equipment to simultaneously transmit information, and is convenient for networking and information transmission.
As shown in fig. 3, the electromagnetic energy collected by the sensor 4 through the ac energized line of the power distribution device is converted to electrical energy to power it. The left side of the sensor 4 in the circuit diagram is an alternating current input interface of the power distribution equipment, and electrolytic capacitors CE1 and CF1 are used for filtering and storing energy; the voltage stabilizer is used for outputting 3.3V to supply power for the sensor; the voltage detector provides an effective level output for the enable pin of the voltage regulator.
Example 2
An intelligent fault monitoring method for power distribution equipment,
s1: the sensor 4 starts a low power consumption mode, the sensor 4 converts electromagnetic energy collected by an alternating current power-on line of the power distribution equipment into electric energy to supply power to the sensor 4, and when alternating current passing through the sensor 4 is greater than 5A, the sensor 4 starts to work and enters a low power consumption working mode.
S2: the sensor 4 automatically adjusts the sampling interval according to the collected energy; the greater the current through the sensor 4, the more energy is collected; when the energy is sufficient, shortening the data transmission time interval; and when the energy is insufficient, the data transmission time interval is prolonged.
S3: before the sensor 4 sends data, it jumps out of low power consumption mode to detect channel activity, before the data is sent, it firstly judges if the received signal strength of the wireless communication channel is lower than the set threshold, and it judges if there is stronger signal in the channel to transmit or has stronger interference by detecting the received signal strength in the wireless communication channel bandwidth, and only if the received signal strength is lower than the set threshold, it can do data transmission.
S4: when the channel is in an idle state, transmitting data to the intelligent monitoring terminal 3; when the channel is in a busy state, the random delay is backed off, the channel activity detection is continued, and when the channel is in an idle state, the data transmission is carried out.
S5: the intelligent monitoring terminal 3 receives the data and displays the data.
S6: the intelligent monitoring terminal 3 judges whether the data is out of limit, if so, the relay alarm output 5 gives an alarm, the intelligent monitoring terminal 3 is provided with a current fault alarm range and a temperature out-of-limit alarm threshold, and if so, the relay alarm output 5 timely outputs alarm information and the alarm indicator lamp 6 flashes.
S7: after the data transmission of the sensor 4 is completed, restarting the low-power consumption state, and storing redundant electric energy.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (9)
1. An intelligent fault monitoring system of power distribution equipment is characterized by comprising a current acquisition circuit, a temperature acquisition circuit, an intelligent monitoring terminal and a plurality of sensors,
the sensor is connected with the current acquisition circuit and the temperature acquisition circuit and is used for acquiring current data information and temperature data information of power distribution equipment and transmitting the temperature data information and the current data information to the intelligent monitoring terminal in a wireless communication mode;
the intelligent monitoring terminal comprises a relay alarm output, the intelligent monitoring terminal receives temperature data information and current data information in real time and is provided with a current fault alarm range and a temperature overrun alarm threshold value, and when the received temperature data information and current data information exceed the current fault alarm range and the temperature overrun alarm threshold value, the relay alarm output gives an alarm.
2. The intelligent fault monitoring system of the power distribution equipment according to claim 1, wherein the intelligent monitoring terminal further comprises an alarm indicator lamp and an RS485 communication interface, and the alarm indicator lamp flashes or stops flashing at a certain frequency according to the on-off state of the alarm output of the relay; the RS485 communication interface uses a Modbus communication protocol to allow multiple power distribution devices to simultaneously transmit information.
3. The intelligent fault monitoring system of a power distribution device of claim 1, wherein the wireless communication has frequencies of 300-348MHz,400-464MHz and 800-928MHz.
4. A power distribution equipment intelligent fault monitoring system according to claim 3, wherein the sensor converts electromagnetic energy collected by the ac energized line of the power distribution equipment into electrical energy to power it.
5. An intelligent fault monitoring method for power distribution equipment is characterized in that,
the sensor starts a low power consumption mode;
the sensor automatically adjusts the sampling interval according to the collected energy;
the sensor jumps out of a low-power consumption mode before sending data, channel activity detection is carried out, and when a channel is in an idle state, the sensor sends the data to the intelligent monitoring terminal; when the channel is in a busy state, carrying out random delay back-off, continuing to carry out channel activity detection, and carrying out data transmission when the channel is in an idle state;
the intelligent monitoring terminal receives the data and displays the data, judges whether the data is out of limit, and if the data is out of limit, the relay outputs an alarm;
and restarting the low-power consumption state after the sensor data transmission is completed, and storing redundant electric energy.
6. The intelligent fault monitoring method for power distribution equipment according to claim 5, wherein the sensor starts a low power consumption mode, and specifically further comprises the step that the sensor converts electromagnetic energy collected by an alternating current power-on line of the power distribution equipment into electric energy to supply power to the sensor, and when the alternating current passing through the sensor is greater than 5A, the sensor starts to work and enters the low power consumption operation mode.
7. The intelligent fault monitoring method of a power distribution device of claim 5, wherein the sensor automatically adjusts the sampling interval based on the collected energy; the more current passing through the sensor, the more energy is collected; when the energy is sufficient, shortening the data transmission time interval; and when the energy is insufficient, the data transmission time interval is prolonged.
8. The intelligent fault monitoring method for power distribution equipment according to claim 5, wherein the sensor jumps out of a low power consumption mode before transmitting data, performs channel activity detection, and transmits data to the intelligent monitoring terminal when the channel is in an idle state; when the channel is in a busy state, carrying out random delay back-off, continuing to carry out channel activity detection, and carrying out data transmission when the channel is in an idle state; the method specifically further comprises the steps of judging whether the received signal strength of the wireless communication channel is lower than a set threshold value or not before data transmission, judging whether stronger signals are transmitted or have stronger interference in the channel or not by detecting the received signal strength in the bandwidth of the wireless communication channel, and carrying out data transmission only when the received signal strength is lower than the set threshold value.
9. The intelligent fault monitoring method for the power distribution equipment according to claim 5, wherein the intelligent monitoring terminal receives data and displays the data, judges whether the data is out of limit, and if the data is out of limit, the relay alarm output gives an alarm, and particularly further comprises an alarm indicator lamp, wherein the intelligent monitoring terminal is provided with a current fault alarm range and a temperature out-of-limit alarm threshold, and if the data is out of limit, the relay alarm output timely outputs alarm information, and the alarm indicator lamp flashes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310418347.7A CN116488334A (en) | 2023-04-14 | 2023-04-14 | Intelligent fault monitoring system and method for power distribution equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310418347.7A CN116488334A (en) | 2023-04-14 | 2023-04-14 | Intelligent fault monitoring system and method for power distribution equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116488334A true CN116488334A (en) | 2023-07-25 |
Family
ID=87220727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310418347.7A Pending CN116488334A (en) | 2023-04-14 | 2023-04-14 | Intelligent fault monitoring system and method for power distribution equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116488334A (en) |
-
2023
- 2023-04-14 CN CN202310418347.7A patent/CN116488334A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201234165Y (en) | Automatic control apparatus for power distribution system | |
| CN202133474U (en) | Temperature measuring system for cable conductor joint | |
| CN110932395A (en) | Low-voltage intelligent spare power automatic switching communication system | |
| CN106597090B (en) | Electric energy data acquisition system based on wireless network transmission and working method thereof | |
| CN116488334A (en) | Intelligent fault monitoring system and method for power distribution equipment | |
| CN210840077U (en) | Intelligent monitoring short message gateway device | |
| CN219833839U (en) | Intelligent fault monitoring device for power distribution equipment | |
| CN103487168A (en) | Temperature rise on-line detecting device for distribution transformer | |
| CN217216103U (en) | Power distribution station low-voltage side fault on-line monitoring and diagnosing system | |
| CN111341056A (en) | Cable anti-theft device based on internet of things | |
| CN214479832U (en) | Electrical safety operation and maintenance system based on Internet of things | |
| CN211603415U (en) | Transformer substation operation and maintenance cable insulation monitoring system | |
| CN212486205U (en) | Station reactive power's monitoring early warning device | |
| CN112436611B (en) | Method, device and system for monitoring jump data of transformer substation | |
| CN111596128B (en) | Single-phase intelligent electric energy meter for UPS power supply monitoring | |
| CN209895165U (en) | Sewage treatment tank acquisition controller | |
| CN210416234U (en) | Intelligent power management box for automobile | |
| CN218940688U (en) | Circuit mounting structure for electricity taking before meter | |
| CN220584374U (en) | Train first cabinet monitored control system | |
| CN217956783U (en) | Intelligent circuit breaker capable of realizing data acquisition | |
| CN212676541U (en) | Electric socket based on LoRa agreement | |
| CN216285600U (en) | Breaker switch state monitoring system | |
| CN221174789U (en) | Wireless synchronous acquisition and transmission system for cable grounding current | |
| CN116634308B (en) | Instrument abnormal event acquisition method and system | |
| CN220457126U (en) | Interconnection power supply device between high-voltage direct-current power supply circuit sections |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |