CN114034974A - High-voltage transmission conductor crossing distance monitoring system based on accurate positioning - Google Patents
High-voltage transmission conductor crossing distance monitoring system based on accurate positioning Download PDFInfo
- Publication number
- CN114034974A CN114034974A CN202111317128.7A CN202111317128A CN114034974A CN 114034974 A CN114034974 A CN 114034974A CN 202111317128 A CN202111317128 A CN 202111317128A CN 114034974 A CN114034974 A CN 114034974A
- Authority
- CN
- China
- Prior art keywords
- voltage
- line
- temperature
- monitoring
- power supply
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 51
- 238000012544 monitoring process Methods 0.000 title claims abstract description 50
- 239000004020 conductor Substances 0.000 title claims description 33
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 32
- 230000006698 induction Effects 0.000 claims description 12
- 230000009191 jumping Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 8
- 238000013500 data storage Methods 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a high-voltage transmission wire crossing distance monitoring system based on accurate positioning, which relates to the technical field of line monitoring control systems, and comprises a processor, a temperature and humidity detection device and a fault detection device, wherein the processor is used for comprehensively controlling and coordinately managing functional modules of the system and is responsible for collecting, processing and uploading voltage, current, wire temperature and microclimate information of a transmission line, the temperature and humidity detection device is used for detecting the working environment temperature and humidity of the high-voltage transmission wire, the temperature and humidity detection device is composed of a remote monitoring center, an on-site monitoring terminal and a local monitoring station positioned between the remote monitoring center and the on-site monitoring terminal, has the characteristics of distributed monitoring, timely information interaction and centralized management, integrates the state detection and the fault detection of the transmission line, can improve the monitoring accuracy, can play a role of early warning on faults, and improve the power supply quality and the power supply quality of a power supply system, Reliability and safety are of great significance.
Description
Technical Field
The invention relates to the technical field of line monitoring and control systems, in particular to a high-voltage transmission conductor crossing distance monitoring system based on accurate positioning.
Background
The high-voltage transmission line extends vertically and horizontally for dozens of or even hundreds of kilometers and is in different environments. Therefore, the high-voltage transmission line is greatly influenced by the geographical environment and climate, the power failure accident of the power grid is mainly caused by the line accident every year, the traditional transmission line inspection mainly depends on the periodic inspection of operation and maintenance personnel, although the equipment hidden danger can be found, the detection of special environment and climate is lacked due to the limitation of the traditional transmission line inspection, the external force change of a line corridor can not be mastered in time in the vacuum period of the inspection period, the line accident is very easy to occur before the next inspection, the line accident is lacked in monitoring, the helicopter line inspection mode is mostly adopted for the inspection of the high-voltage lines at home and abroad at present, the method has the biggest defect of safety problem, the influence of weather on the outgoing of the airplane is large, the cost is very high, the line inspection robot is researched at the end of the 20 th century 80 years, the line inspection robot is researched abroad, the robot is also designed by the recent structure at home, but the system is complex, and the operation stability and the detection range have certain problems, and energy consumption becomes the bottleneck of the system.
The detection device for some high-voltage transmission lines adopts a helicopter line patrol mode, the biggest defect of the method is the safety problem, the influence of weather on the traveling of the airplane is large, the cost is very high, the actual operation effect is not ideal, a line patrol robot system is complex, the operation stability and the detection range have certain problems, and the energy consumption becomes the bottleneck of the system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high-voltage transmission conductor crossing distance monitoring system based on accurate positioning, and solves the problems that the existing detection system is difficult to detect the position of a fault point of a high-voltage transmission conductor and consumes long time.
In order to achieve the purpose, the invention is realized by the following technical scheme: a high voltage power transmission conductor crossing distance monitoring system based on precise positioning, the system comprising:
the processor is used for comprehensively controlling and coordinately managing the functional modules of the system and is responsible for acquiring, processing and uploading the voltage, the current, the wire temperature and the microclimate information of the power transmission line;
the environment temperature and humidity detection device is used for detecting the working environment temperature and humidity of the high-voltage transmission conductor;
the wind speed and direction sensor is used for detecting the wind speed and the wind direction of the environment of the high-voltage transmission conductor;
the wire temperature sensor is used for identifying and detecting the temperature of the high-voltage transmission wire and timely and effectively detecting wire temperature data;
the power supply device is used for providing a stable, reliable and safe power supply for the detected device;
the detection circuit detects the change condition of the data of the voltage and the current of the high-voltage transmission conductor;
the communication device is used for uploading high-voltage transmission conductor alarm information, fault information and data of voltage, current, conductor temperature and environmental microclimate information of the conductor;
a method for an alarm indicating device to identify a fault and issue an alarm signal based on a precisely positioned system for monitoring the distance covered by a high voltage transmission conductor after the high voltage transmission conductor has failed, comprising the steps of,
sp 1: the server monitoring port detects whether the voltage jump state of the current circuit is normal, if not, the monitoring is continued, and if so, the server monitoring port jumps to the second step;
sp 2: after stable operation is carried out for 1min, whether the current has sudden change is detected, if yes, the fourth step is skipped after 4s of time delay, and if not, the third step is skipped;
sp 3: detecting whether the broken road is high voltage or not, otherwise, indicating that the line is normal, and indicating that the fault is an open circuit fault if the broken road is high voltage;
sp 4: detecting whether the line is powered off, wherein the power-off indicates that the line is a short-circuit fault, and jumping to the seventh step, and jumping to the fifth step if the line is not powered off;
sp 5: detecting whether the voltage reduction value is normal, if so, delaying for 30s and then jumping to the sixth step, otherwise, indicating that the line is normal;
sp 6: detecting whether the voltage value is reduced, if the voltage value is reduced, indicating the ground fault, and jumping to the seventh step, otherwise indicating that the line is normal;
sp 7: and receiving the fault information of the line, and uploading and sending the fault information.
Preferably, the processor comprises a microcontroller and a data storage circuit, wherein the microcontroller is an STM32F103C8T6 type microcontroller with the working frequency of 72MHz, and is integrated with 64K bytes of flash program storage and 20K bytes of SRAM, and the data storage circuit is FM25CL04 type memory.
Preferably, power supply unit includes that solar power supply unit and induction get the electric installation, and solar power supply unit and induction get the electric installation and independently supply power respectively, and the electric installation is got for CT to the induction get the electric installation, and solar power supply unit and induction get the electric installation and be equipped with independent lithium cell auxiliary power supply respectively.
Preferably, the communication device comprises a long-distance communication device and a short-distance communication device, the long-distance communication device is a 5G communication device, and the short-distance communication device is a communication device supporting a ZigBee communication protocol.
Preferably, the environment temperature detection device is an SHT71 temperature and humidity sensor, and the SHT71 is connected with the microcontroller of the processor through two-wire serial digital interface communication.
Preferably, the wind speed and direction sensor is a PHWS/WD wind speed sensing device, and an output signal end of the wind speed and direction sensor controls an output signal range to 0-3.3V by using a resistor divider.
Preferably, the wire temperature sensor is a DS18B20 digital temperature sensing device, and the wire temperature sensor is connected with the microcontroller of the processor through a data line, a power line and a ground line.
The invention provides a high-voltage transmission conductor crossing distance monitoring system based on accurate positioning, which has the following beneficial effects:
the monitoring system is divided into a remote monitoring center, a field monitoring terminal and a local monitoring site located between the remote monitoring center and the field monitoring terminal, has the characteristics of distributed monitoring, timely information interaction and centralized management, integrates state detection and fault detection of a power transmission line together, can improve monitoring precision, can play a role in early warning on faults, and has great significance for improving power supply quality, reliability and safety of a power supply system.
Drawings
FIG. 1 is a diagram of the system connection architecture of the present invention;
FIG. 2 is a flow chart of the method of the present invention.
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 first embodiment is as follows:
as shown in fig. 1, a high voltage power transmission conductor crossing distance monitoring system based on precise positioning comprises:
the processor is used for comprehensively controlling and coordinately managing the functional modules of the system and is responsible for acquiring, processing and uploading the voltage, the current, the wire temperature and the microclimate information of the power transmission line;
the environment temperature and humidity detection device is used for detecting the working environment temperature and humidity of the high-voltage transmission conductor;
the wind speed and direction sensor is used for detecting the wind speed and the wind direction of the environment of the high-voltage transmission conductor;
the wire temperature sensor is used for identifying and detecting the temperature of the high-voltage transmission wire and timely and effectively detecting wire temperature data;
the power supply device is used for providing a stable, reliable and safe power supply for the detected device;
the detection circuit detects the change condition of the data of the voltage and the current of the high-voltage transmission conductor;
the communication device is used for uploading high-voltage transmission conductor alarm information, fault information and data of voltage, current, conductor temperature and environmental microclimate information of the conductor;
and the alarm indicating device identifies the fault and sends an alarm signal after the high-voltage transmission conductor fails.
Wherein, the processor comprises a microcontroller and a data storage circuit, the microcontroller is an STM32F103C8T6 type microcontroller with the working frequency of 72MHz, the microcontroller is integrated with 64K bytes of flash program storage and 20K bytes of SRAM at the same time, the data storage circuit is an FM25CL04 type memory for storing related parameter configuration, monitoring the addresses of nodes and a control center, sampling interval time and communication module parameter configuration, avoiding data loss and parameters due to power failure, the power supply device comprises a solar power supply device and an induction power taking device, the solar power supply device and the induction power taking device supply power independently respectively, the induction power taking device is a CT power taking device, partial electric energy is transmitted to the power supply module from a lead by utilizing interval change of current, and the solar power supply device and the induction power taking device are respectively provided with independent lithium battery auxiliary power supplies power and are used for storing redundant electric energy in a lithium battery, the solar power supply device has the characteristics of good performance, long service life, no memory effect and capability of charging and discharging at any time, the communication device comprises a remote communication device and a near communication device, the remote communication device is a 5G communication device and can realize high data rate or low delay, the near communication device is a communication device supporting a ZigBee communication protocol and can realize communication among a plurality of devices according to requirements, the environment temperature and humidity detection device is an SHT71 temperature and humidity sensor, the SHT71 is communicated with a microcontroller of a processor and is connected with the microcontroller through a two-wire serial digital interface, the wind speed and direction sensor is a PHWS/WD wind speed sensing device, an output signal end of the wind speed and direction sensor controls the output signal range to be 0-3.3V by using a resistance voltage divider, high-voltage transmission lines are mostly outdoors, the climate condition of the environment is closely related to the running state of the transmission lines, and then influence the tension of wire, utilize environment temperature and humidity detection device and wind speed wind direction sensor to gather the wind direction of node environment, wind speed and environment humiture parameter, thereby realize detecting the microclimate condition of locating, wire temperature sensor is DS18B20 digital temperature sensing device, and wire temperature sensor passes through the data line, power cord and ground wire are connected with the microcontroller of treater, some transmission line's trouble can be embodied through the wire temperature earlier stage, when the circuit takes place overload operation, the wire temperature can rise, the wire high temperature can be with the component ageing with higher speed, can convert the temperature into digital signal through wire temperature sensor and send detection node, realize the real-time detection to the wire temperature.
Example two:
as shown in fig. 2, a method for a high voltage power transmission conductor crossing distance monitoring system based on precise positioning, comprises the steps of,
sp 1: the server monitors whether the voltage jump of the current circuit is larger than a set threshold value of the high-voltage transmission line or not and whether the circuit is powered off or not, if not, the monitoring is continued, and if so, the server jumps to the second step;
sp 2: after stable operation is carried out for 1min, whether the current has sudden change is detected, if yes, the fourth step is skipped after 4s of time delay, and if not, the third step is skipped;
sp 3: detecting whether the broken road is high voltage or not, otherwise, indicating that the line is normal, and indicating that the fault is an open circuit fault if the broken road is high voltage;
sp 4: detecting whether the line is powered off, wherein the power-off indicates that the line is a short-circuit fault, and jumping to the seventh step, and jumping to the fifth step if the line is not powered off;
sp 5: detecting whether the voltage reduction value exceeds a set threshold value of the high-voltage transmission line, if so, delaying for 30s, and then jumping to the sixth step, otherwise, indicating that the line is normal;
sp 6: detecting whether the voltage value is reduced, if the voltage value is reduced, indicating the ground fault, and jumping to the seventh step, otherwise indicating that the line is normal;
sp 7: and receiving the fault information of the line, and uploading and sending the fault information.
On an overhead transmission line of a high-voltage transmission line, setting a monitoring station at intervals according to the next level of a selected condition monitoring center, wherein each monitoring station is provided with a plurality of monitoring terminals, each set of monitoring terminal consists of three monitoring nodes, the three monitoring nodes are respectively arranged on a three-phase line, one monitoring node is a host, the other two monitoring nodes are submachine, the common component of the host and the submachine is provided with a detection circuit, a communication device, an alarm indicating device, a power supply device and a processor, the host close to a tower pole is selected to be additionally provided with an environment temperature and humidity detection device, a wind speed and wind direction sensor and a lead temperature sensor at intervals of the plurality of detection terminals for detecting the running state of the transmission line, the monitoring can be conveniently and effectively positioned by a hierarchical mode, the monitoring precision is improved, and when a microcontroller detects that the circuit input voltage of the detection circuit is greater than a set threshold value, when the power line is stable for a period of time, the microcontroller detects that the jump generated by the current of the line is larger than a set threshold value and the voltage signal is reduced to a certain proportion, the line still has electricity after a certain time in the state, the fault can be judged to be a ground fault, the judgment of the open circuit fault is realized by detecting the high and low levels of the open circuit mouth of the microcontroller, the monitoring system is composed of a remote monitoring center, an on-site monitoring terminal and a local monitoring station positioned between the remote monitoring center and the on-site monitoring terminal, has the characteristics of distributed monitoring, timely information interaction and centralized management, and combines the state detection and the fault detection of the power line together, the monitoring accuracy can be improved, the fault early warning function can be achieved, and the power supply system has great significance in improving the power supply quality, reliability and safety of the power supply system.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. However, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. High voltage power transmission conductor crossing distance monitoring system based on accurate positioning, characterized in that the system comprises:
the processor is used for comprehensively controlling and coordinately managing the functional modules of the system and is responsible for acquiring, processing and uploading the voltage, the current, the wire temperature and the microclimate information of the power transmission line;
the environment temperature and humidity detection device is used for detecting the working environment temperature and humidity of the high-voltage transmission conductor;
the wind speed and direction sensor is used for detecting the wind speed and the wind direction of the environment of the high-voltage transmission conductor;
the wire temperature sensor is used for identifying and detecting the temperature of the high-voltage transmission wire and timely and effectively detecting wire temperature data;
the power supply device is used for providing a stable, reliable and safe power supply for the detected device;
the detection circuit detects the change condition of the data of the voltage and the current of the high-voltage transmission conductor;
the communication device is used for uploading high-voltage transmission conductor alarm information, fault information and data of voltage, current, conductor temperature and environmental microclimate information of the conductor;
and the alarm indicating device identifies the fault and sends an alarm signal after the high-voltage transmission conductor fails.
2. The method of the high-voltage transmission conductor crossing distance monitoring system based on accurate positioning is characterized in that: comprises the following steps of (a) carrying out,
sp 1: the server monitoring port detects whether the voltage jump state of the current circuit is normal, if not, the monitoring is continued, and if so, the server monitoring port jumps to the second step;
sp 2: after stable operation is carried out for 1min, whether the current has sudden change is detected, if yes, the fourth step is skipped after 4s of time delay, and if not, the third step is skipped;
sp 3: detecting whether the broken road is high voltage or not, otherwise, indicating that the line is normal, and indicating that the fault is an open circuit fault if the broken road is high voltage;
sp 4: detecting whether the line is powered off, wherein the power-off indicates that the line is a short-circuit fault, and jumping to the seventh step, and jumping to the fifth step if the line is not powered off;
sp 5: detecting whether the voltage reduction value is normal, if so, delaying for 30s and then jumping to the sixth step, otherwise, indicating that the line is normal;
sp 6: detecting whether the voltage value is reduced, if the voltage value is reduced, indicating the ground fault, and jumping to the seventh step, otherwise indicating that the line is normal;
sp 7: and receiving the fault information of the line, and uploading and sending the fault information.
3. The system of claim 1, wherein the system comprises: the processor comprises a microcontroller and a data storage circuit, wherein the microcontroller is an STM32F103C8T6 type microcontroller with the working frequency of 72MHz, a flash program storage of 64K bytes and an SRAM of 20K bytes are integrated at the same time, and the data storage circuit is an FM25CL04 type memory.
4. The system of claim 1, wherein the system comprises: the power supply device comprises a solar power supply device and an induction power taking device, the solar power supply device and the induction power taking device are respectively and independently powered, the induction power taking device is a CT power taking device, and the solar power supply device and the induction power taking device are respectively provided with independent lithium battery auxiliary power supplies.
5. The system of claim 1, wherein the system comprises: the communication device comprises a long-distance communication device and a short-distance communication device, wherein the long-distance communication device is a 5G communication device, and the short-distance communication device is a communication device supporting a ZigBee communication protocol.
6. The system of claim 1, wherein the system comprises: the environment temperature detection device is an SHT71 temperature and humidity sensor, and the SHT71 is in communication connection with a microcontroller of the processor through a two-wire serial digital interface.
7. The system of claim 1, wherein the system comprises: the wind speed and direction sensor is a PHWS/WD wind speed sensing device, and the output signal end of the wind speed and direction sensor controls the output signal range to be 0-3.3V by utilizing a resistor voltage divider.
8. The system of claim 1, wherein the system comprises: the lead temperature sensor is a DS18B20 digital temperature sensing device and is connected with a microcontroller of the processor through a data line, a power line and a ground line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317128.7A CN114034974A (en) | 2021-11-09 | 2021-11-09 | High-voltage transmission conductor crossing distance monitoring system based on accurate positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111317128.7A CN114034974A (en) | 2021-11-09 | 2021-11-09 | High-voltage transmission conductor crossing distance monitoring system based on accurate positioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114034974A true CN114034974A (en) | 2022-02-11 |
Family
ID=80136750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111317128.7A Pending CN114034974A (en) | 2021-11-09 | 2021-11-09 | High-voltage transmission conductor crossing distance monitoring system based on accurate positioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114034974A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114884981A (en) * | 2022-03-23 | 2022-08-09 | 国网浙江省电力有限公司湖州供电公司 | Ultra-high voltage gallery channel environment panoramic monitoring method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008268084A (en) * | 2007-04-23 | 2008-11-06 | Denso Corp | Removable distribution system short-circuit fault detection device |
| CN103376387A (en) * | 2012-04-13 | 2013-10-30 | 常熟皇朝信息科技有限公司 | Transmission grid fault detection system and method based on internet of thing technology |
| CN104634391A (en) * | 2015-01-30 | 2015-05-20 | 国网河南省电力公司郑州供电公司 | On-line monitoring system of high-voltage power transmission line |
-
2021
- 2021-11-09 CN CN202111317128.7A patent/CN114034974A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008268084A (en) * | 2007-04-23 | 2008-11-06 | Denso Corp | Removable distribution system short-circuit fault detection device |
| CN103376387A (en) * | 2012-04-13 | 2013-10-30 | 常熟皇朝信息科技有限公司 | Transmission grid fault detection system and method based on internet of thing technology |
| CN104634391A (en) * | 2015-01-30 | 2015-05-20 | 国网河南省电力公司郑州供电公司 | On-line monitoring system of high-voltage power transmission line |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114884981A (en) * | 2022-03-23 | 2022-08-09 | 国网浙江省电力有限公司湖州供电公司 | Ultra-high voltage gallery channel environment panoramic monitoring method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101446618B (en) | Real-time monitoring system of faults of overhead lines of distribution network | |
| CN106249073A (en) | Distribution network failure based on LoRa communication technology instruction system | |
| CN104237645A (en) | Online monitoring system and method for insulation state of substation DC system | |
| CN107656467A (en) | A kind of method based on Internet of Things Distribution Management System and its on-line monitoring | |
| CN211296946U (en) | Railway electric power comprehensive operation and maintenance management system | |
| CN201314942Y (en) | Monitoring system for detecting the fault of distribution network trolly wires | |
| CN113410910A (en) | Power distribution station monitoring system and monitoring method based on intelligent fusion terminal | |
| CN101738565A (en) | Adaptive fault indicator | |
| CN108548567A (en) | A kind of transmission line online monitoring system with temperature monitoring | |
| CN103592580A (en) | Insulator haze and pollution flashover online monitoring system and method | |
| CN205880114U (en) | Join in marriage power system fault indicating system based on loRa communication technology | |
| CN112684292A (en) | Wind power plant current collection line monitoring system, method and device | |
| CN104133157A (en) | High-voltage line failure indication and failure automatic positioning system | |
| CN206946006U (en) | A kind of small-sized weather station integral control system | |
| CN114034974A (en) | High-voltage transmission conductor crossing distance monitoring system based on accurate positioning | |
| CN201993434U (en) | System for quickly positioning distribution network faults based on wireless sensor network | |
| CN117614487A (en) | Beidou system-based transmission line communication method and system | |
| CN204613369U (en) | A kind of novel intelligent battery inspection unit | |
| CN204421946U (en) | A kind of fault detection system for transmission line of electricity | |
| CN202814597U (en) | High-voltage power transmission line temperature measuring system | |
| CN205539304U (en) | Composite fiber -optic overhead ground wi monitor terminal and system | |
| CN212433937U (en) | Mobile application terminal intelligent photovoltaic module monitoring and alarming system | |
| CN210639233U (en) | Power distribution network fault monitoring device based on mobile internet | |
| CN210270038U (en) | Fault indicator with trend recognition function | |
| CN208421135U (en) | Distribution line status display apparatus |
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 |