CN113037842B - Remote maintenance system of substation automation system - Google Patents
Remote maintenance system of substation automation system Download PDFInfo
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- CN113037842B CN113037842B CN202110253863.XA CN202110253863A CN113037842B CN 113037842 B CN113037842 B CN 113037842B CN 202110253863 A CN202110253863 A CN 202110253863A CN 113037842 B CN113037842 B CN 113037842B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- General Health & Medical Sciences (AREA)
- Computing Systems (AREA)
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a remote maintenance system of a substation automation system, which comprises a central processing unit, wherein the central processing unit is in transmission connection with a data acquisition module through a WiFi module, and the input end of the data acquisition module is electrically connected with the output ends of a security system and an equipment monitoring system respectively through leads. The invention relates to the technical field of transformer substations, in particular to a remote maintenance system of a transformer substation automation system.
Description
Technical Field
The invention relates to the technical field of transformer substations, in particular to a remote maintenance system of a transformer substation automation system.
Background
The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system, and the transformer substation in a power plant is a boosting transformer substation and is used for boosting the electric energy generated by a generator and then feeding the electric energy into a high-voltage power grid.
The invention with Chinese patent number CN108924224B discloses a substation field maintenance and repair real-time communication system, which comprises: the cloud power information processing unit is used for monitoring a center service area and a transformer substation maintenance area; the monitoring center service area comprises: the system comprises a monitoring center communication module, a monitoring center host, a monitoring area image acquisition module, a monitoring area sound acquisition module and a monitoring center display module. The cloud power information processing unit is built in the regional information communication channel according to the work task and work requirements. And transmitting and managing the image information and the voice information. The method and the system have the advantages that monitoring personnel in a service area of the monitoring center can conduct operation on the spot in person, and the information of the operation on the spot can be obtained in real time. And the operation is guided, and the operation safety is ensured. And based on data information held by the cloud power information processing unit.
The utility model discloses a chinese patent number is CN 202634080U's utility model discloses a remote maintenance system of transformer substation automation system, synthesize automatic control system including the transformer substation, the transformer substation synthesizes automatic control system and is connected with a plurality of remote maintenance PC work substations that are located different areas and can long-range definite value modification and remote maintenance, independent setting between a plurality of remote maintenance PC work substations, every transformer substation remote maintenance PC work substation is respectively through the network information transmission for the transformer substation synthesize automatic control system. Through right the utility model discloses a rational design, compare with prior art, combed the division of regional maintenance boundary effectively, solved the problem that maintenance personal ran many times, alleviateed the maintenance work load.
According to the two comparison patents and in the practical application process, the transformer substation does not play a good security role in the working process of the transformer substation, and only monitors through the camera, so that the security effect is reduced, the good monitoring role in the working condition of equipment inside the transformer substation and the surrounding environment cannot be played, and further, better remote maintenance work can not be carried out on the transformer substation by related background personnel.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a remote maintenance system of a substation automation system, which solves the problems that the security effect is reduced, the working condition of equipment in a substation and the surrounding environment cannot be well monitored, and further, the relevant background personnel cannot perform better remote maintenance work on the substation because the substation is not well monitored only by a camera in the working process.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a long-range maintenance system of transformer substation automation system, includes central processing unit, central processing unit and data acquisition module between through wiFi module transmission connection, data acquisition module's input pass through the wire respectively with security protection system and equipment monitoring system's output electric connection, central processing unit's output passes through wire and management system's input electric connection, all carry out transmission connection through data transmission module between management system and security protection system and the equipment monitoring system.
The security system comprises a personnel information acquisition unit, a monitoring unit and a warning unit, wherein the personnel information acquisition unit and the warning unit are connected in a two-way mode through a wire, and the output end of the monitoring unit is electrically connected with the input end of the warning unit through the wire.
The equipment monitoring system comprises a voltage threshold module, wherein the input end of the voltage threshold module is electrically connected with the output ends of a humidity sensor, a temperature sensor, a total pressure monitoring module and a partial pressure monitoring module through a wire, the output end of the voltage threshold module is electrically connected with the input end of an abnormal early warning module through a wire, the output end of the abnormal early warning module is electrically connected with the input end of a circuit judgment module through a wire, and the output end of the circuit judgment module is electrically connected with the input end of a control unit through a wire.
Preferably, the personnel information acquisition unit comprises a face acquisition module, an identity information registration module and a storage module, the output ends of the face acquisition module and the identity information registration module are electrically connected with the input end of the storage module through wires, and the information acquired by the face acquisition module and the identity information registration module is substation workers.
Preferably, the monitoring unit comprises a monitoring camera and a memory, and the output end of the monitoring camera is electrically connected with the input end of the memory through a wire.
Preferably, the warning unit is including the contrast module, the input electric connection of contrast module's output through wire and the certain module of living being, the input electric connection of certain module of living being is passed through to the output of certain module of living being, the output of certain module of living being passes through the wire and uploads module and acousto-optic warning ware and speech editing module's output electric connection with the picture respectively, the input electric connection of speech editing module through wire and speech sound ware is passed through to the output of speech editing module, realize both way junction through the wire between certain processing module and the time comparison module, the output electric connection of time comparison module's input through wire and time threshold value module.
Preferably, the time threshold in the time threshold module is set to be more than 10 minutes.
Preferably, the voltage threshold module is a numerical value normal range value of total pressure and partial pressure, temperature and humidity of the transformer substation.
Preferably, the control unit comprises a switch control module, the output end of the switch control module is electrically connected with the input end of the switch through a wire, the number of the switches is N, and the number of the N is correspondingly set according to the number of the data.
Preferably, the management system comprises a display module, an output end of the display module is electrically connected with an input end of the fault reminding module through a wire, an output end of the fault reminding module is electrically connected with an input end of the notification unit through a wire, and an input end of the display module is electrically connected with an output end of the picture receiving module through a wire.
Preferably, the notification unit comprises a short message editing module, and the short message editing module is in transmission connection with the mobile phone APP through a communication module.
Advantageous effects
The invention provides a remote maintenance system of a substation automation system, which has the following beneficial effects compared with the prior art:
(1) The output end of the comparison module is electrically connected with the input end of the person determining module through a wire, the output end of the person determining module is electrically connected with the input end of the person processing module through a wire, the output end of the person processing module is electrically connected with the output ends of the picture uploading module, the acousto-optic alarm and the voice editing module through wires, the output end of the voice editing module is electrically connected with the input end of the voice generator through a wire, the person processing module and the time comparison module are connected in a bidirectional mode through a wire, the input end of the time comparison module is electrically connected with the output end of the time threshold module through a wire, a good monitoring and security effect can be achieved on the transformer substation, when a stranger approaches the transformer substation and the residence time of the stranger is too long, the stranger can be timely reminded of relevant background personnel, the backstage personnel can warn the stranger to leave the transformer substation, the stranger is prevented from stealing equipment or lines inside the transformer substation, and the transformer substation is protected.
(2) This transformer substation automation system's remote maintenance system, input through voltage threshold module passes through wire and humidity transducer and temperature sensor, total pressure monitoring module and partial pressure monitoring module's output electric connection, and voltage threshold module's output passes through wire and unusual early warning module's input electric connection, unusual early warning module's output passes through wire and circuit judgment module's input electric connection, circuit judgment module's output passes through wire and the input electric connection of the control unit, can play fine monitoring role to the internal plant circuit of transformer substation and surrounding environment, when equipment breaks down or the inside temperature of transformer substation and humidity are unusual, can inform backstage personnel the very first time, backstage personnel can the equipment line switch of remote control problem, close it, improve the security performance of transformer substation, and then reduce unnecessary loss.
(3) This transformer substation automation system's remote maintenance system, the output through display module passes through the input electric connection of wire with the trouble warning module, the output of trouble warning module passes through the input electric connection of wire with the notice unit, the input of display module passes through the output electric connection of wire with picture receiving module, when any problem appears in the security protection system and the equipment management of this transformer substation, can in time give backstage terminal with information transfer, the backstage terminal can send the information that goes wrong for relevant staff with the SMS mode, can make the staff go to look over the condition of transformer substation the very first time.
(4) This transformer substation automation system's remote maintenance system, through central processing unit with through wiFi module transmission connection between the data acquisition module, data acquisition module's input pass through the wire respectively with security protection system and equipment monitoring system's output electric connection, central processing unit's output passes through wire and management system's input electric connection, all carry out transmission connection through the data transmission module between management system and security protection system and the equipment monitoring system, this remote maintenance system reasonable in design, not only make the work that the transformer substation can be better, reduce the incidence of trouble, personnel's intensity of labour has also been reduced simultaneously, can adapt to and use in various transformer substations.
Drawings
FIG. 1 is a schematic frame diagram of the present invention;
FIG. 2 is a schematic frame diagram of the security system of the present invention;
FIG. 3 is a schematic block diagram of the device monitoring system of the present invention;
FIG. 4 is a schematic block diagram of the control unit of the present invention;
FIG. 5 is a schematic block diagram of the management system of the present invention;
FIG. 6 is a logic diagram of the present invention.
In the figure: 1. a central processing unit; 2. a data acquisition module; 3. a WiFi module; 4. a security system; 41. a personnel information acquisition unit; 411. a face acquisition module; 412. an identity information registration module; 413. a storage module; 42. a monitoring unit; 421. a surveillance camera; 422. a memory; 43. a warning unit; 431. a comparison module; 432. a live person determination module; 433. a human processing module; 434. a picture uploading module; 435. a time comparison module; 436. a time threshold module; 437. an audible and visual alarm; 438. a voice editing module; 439. a voice generator; 5. a device monitoring system; 51. a voltage threshold module; 52. a humidity sensor; 53. a temperature sensor; 54. a total pressure monitoring module; 55. a partial pressure monitoring module; 56. an anomaly early warning module; 57. a line judgment module; 58. a control unit; 581. a switch control module; 582. a switch; 6. a management system; 61. a display module; 62. a picture receiving module; 63. a fault reminding module; 64. a notification unit; 641. a short message editing module; 642. a communication module; 643. a mobile phone APP; 7. and a data transmission module.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a long-range maintenance system of transformer substation automation system, including central processing unit 1, central processing unit 1 and data acquisition module 2 between through 3 transmission connection of wiFi module, data acquisition module 2's input pass through the wire respectively with security protection system 4 and equipment monitoring system 5's output electric connection, central processing unit 1's output passes through wire and management system 6's input electric connection, all carry out transmission connection through data transmission module 7 between management system 6 and security protection system 4 and the equipment monitoring system 5.
Referring to fig. 2, in the embodiment of the present invention, the security system 4 includes a personnel information collection unit 41, a monitoring unit 42 and a warning unit 43, the personnel information collection unit 41 and the warning unit 43 are connected in a bidirectional manner by a wire, an output end of the monitoring unit 42 is electrically connected to an input end of the warning unit 43 by a wire, the personnel information collection unit 41 includes a face collection module 411, an identity information registration module 412 and a storage module 413, output ends of the face collection module 411 and the identity information registration module 412 are both electrically connected to an input end of the storage module 413 by a wire, information collected by the face collection module 411 and the identity information registration module 412 is a substation worker, the monitoring unit 42 includes a monitoring camera 421 and a memory 422, an output end of the monitoring camera 421 is electrically connected to an input end of the memory 422 by a wire, the warning unit 43 includes a comparison module 431, an output end of the comparison module 431 is electrically connected to an input end of a live person determination module 432 by a wire, an output end of the live person determination module 432 is electrically connected to an input end of the live person processing module 433 by a wire, an output end of the live person processing module 433 is electrically connected to an output end of the live person processing module 434 by a wire, an output end of the live person processing module, an alarm module, and an output end of the live person processing module, an alarm time editing module 435 are electrically connected to an output end of the live time editing module 439 by a live time editing module, and an alarm time editing module, and an output end of the live time editing module.
Referring to fig. 3, in the embodiment of the present invention, the device monitoring system 5 includes a voltage threshold module 51, an input end of the voltage threshold module 51 is electrically connected to output ends of the humidity sensor 52, the temperature sensor 53, the total pressure monitoring module 54, and the partial pressure monitoring module 55 through a wire, an output end of the voltage threshold module 51 is electrically connected to an input end of the abnormality early warning module 56 through a wire, an output end of the abnormality early warning module 56 is electrically connected to an input end of the line judgment module 57 through a wire, an output end of the line judgment module 57 is electrically connected to an input end of the control unit 58 through a wire, and the voltage threshold module 51 is a value within a normal range of values of total pressure, partial pressure, temperature, and humidity of the substation.
Referring to fig. 4, in the embodiment of the present invention, the control unit 58 includes a switch control module 581, an output end of the switch control module 581 is electrically connected to an input end of the switch 582 through a wire, the number of the switches 582 is N, and the number of N is correspondingly set according to the number of data.
Referring to fig. 5, in the embodiment of the present invention, the management system 6 includes a display module 61, an output end of the display module 61 is electrically connected to an input end of the fault reminding module 63 through a wire, an output end of the fault reminding module 63 is electrically connected to an input end of the notification unit 64 through a wire, an input end of the display module 61 is electrically connected to an output end of the picture receiving module 62 through a wire, the notification unit 64 includes a short message editing module 641, and the short message editing module 641 and the mobile APP643 are in transmission connection through a communication module 642.
And those not described in detail in this specification are well within the skill of those in the art.
Security and protection work: the face acquisition module 411 and the identity information registration module 412 perform face acquisition and identity information acquisition on the relevant staff, and store the acquired face acquisition and identity information in the storage module 413, the monitoring camera 421 in the monitoring unit 42 monitors the field condition of the substation, stores the monitored data in the memory 422 after monitoring, and transmits the monitored data to the alarm unit 43, and when a person passes through the substation, the comparison module 431 compares the monitored personnel picture with the face information of the staff collected in advance, judges whether the passing person is matched with the collected face information, if not, the passing person passes through the transformer substation, the stranger determination module 432 determines that the stranger passes through, a time threshold of 10 minutes or more is set in the time threshold module 436, and then the information is transmitted to the time comparison module 435, the time comparison module 435 compares the time that a stranger stays with the time set by the time threshold module 436, if the time that the stranger stays in the substation is less than 10 minutes, it indicates safety without warning to strangers, and if the time for strangers to stay exceeds 10 minutes, the live person processing module 433 transmits the information to the picture uploading module 434, so that the action picture of the stranger is uploaded to the background terminal and displayed in the display module 61 on the management system 6, thereby facilitating the knowledge of the background person, at this time, the background can enable the human processing module 433 to transmit information to the sound and light alarm 437, the sound and light alarm 437 generates an alarm sound to remind a stranger to leave the substation as soon as possible, if the alarm sound is not used, background personnel edit the voice through the voice editing module 438, so that the voice is emitted in the voice generator 439, and strangers are advised to evacuate the substation tightly again.
Equipment management: when the substation works, normal range values of temperature and humidity of the substation are set in a voltage threshold module 51, meanwhile, safety range values of total pressure and partial pressure of each equipment line are set in a total pressure monitoring module 54 and a partial pressure monitoring module 55, a humidity sensor 52 monitors the humidity of the substation, a temperature sensor 53 monitors the temperature of the substation, the total pressure monitoring module 54 monitors the total pressure of the equipment, a partial pressure monitoring module 55 monitors the partial pressure of the equipment, if data monitored by the humidity sensor 52, the temperature sensor 53, the total pressure monitoring module 54 and the partial pressure monitoring module 55 exceed the safety range values set in the voltage threshold module 51, the voltage threshold module 51 transmits signals to an abnormity early warning module 56, the abnormity early warning module 56 transmits the signals to a line judgment module 57, the line judgment module 57 can judge which equipment line has a problem, then transmits the information to a control unit 58, background personnel can control a switch 582 through a switch control module 581, so that the switch 582 of the equipment line with the problem is closed, and the safety performance is improved.
Further, when any one of security work and equipment management has a problem, the picture receiving module 62 can receive the picture monitored by the monitoring camera 421, so that the picture is displayed in the display module 61, then the information is transmitted to the fault reminding module 63, the fault reminding module 63 transmits the information to the notification unit 64, background personnel can edit the information with the problem in the short message editing module 641, and then the edited information is transmitted to related personnel through the communication module 642 according to the condition of the staff information collected in advance, so that the personnel can timely go to the transformer substation to ensure the normal work of the transformer substation.
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. Also, 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.
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 (2)
1. A remote maintenance system of a substation automation system, comprising a central processing unit (1), characterized in that: the intelligent security monitoring system is characterized in that the central processing unit (1) is in transmission connection with the data acquisition module (2) through the WiFi module (3), the input end of the data acquisition module (2) is electrically connected with the output ends of the security system (4) and the equipment monitoring system (5) through wires respectively, the output end of the central processing unit (1) is electrically connected with the input end of the management system (6) through wires, and the management system (6) is in transmission connection with the security system (4) and the equipment monitoring system (5) through the data transmission module (7);
the security system (4) comprises a personnel information acquisition unit (41), a monitoring unit (42) and a warning unit (43), wherein the personnel information acquisition unit (41) is in bidirectional connection with the warning unit (43) through a lead, and the output end of the monitoring unit (42) is electrically connected with the input end of the warning unit (43) through a lead;
the equipment monitoring system (5) comprises a voltage threshold module (51), wherein the input end of the voltage threshold module (51) is electrically connected with the output ends of a humidity sensor (52), a temperature sensor (53), a total pressure monitoring module (54) and a partial pressure monitoring module (55) through leads, the output end of the voltage threshold module (51) is electrically connected with the input end of an abnormity early warning module (56) through leads, the output end of the abnormity early warning module (56) is electrically connected with the input end of a line judgment module (57) through leads, and the output end of the line judgment module (57) is electrically connected with the input end of a control unit (58) through leads;
the personnel information acquisition unit (41) comprises a face acquisition module (411), an identity information registration module (412) and a storage module (413), the output ends of the face acquisition module (411) and the identity information registration module (412) are electrically connected with the input end of the storage module (413) through conducting wires, the information acquired by the face acquisition module (411) and the identity information registration module (412) is substation staff, the monitoring unit (42) comprises a monitoring camera (421) and a memory (422), the output end of the monitoring camera (421) is electrically connected with the input end of the memory (422) through conducting wires, the warning unit (43) comprises a comparison module (431), the output end of the comparison module (431) is electrically connected with the input end of the live person determination module (432) through conducting wires, the output end of the live person determination module (432) is electrically connected with the input end of the live person processing module (433) through conducting wires, the output end of the live person processing module (433) is electrically connected with the voice editing module (437) and the voice editing module (437), the output end of the live person editing module (439) is electrically connected with the input end of the voice editing module (435) through conducting wires, and the output end of the voice editing module (439), the input end of the time comparison module (435) is electrically connected with the output end of the time threshold module (436) through a wire, and the time threshold in the time threshold module (436) is set to be more than 10 minutes;
the control unit (58) comprises a switch control module (581), the output end of the switch control module (581) is electrically connected with the input end of a switch (582) through a lead, N switches (582) are arranged, and the numerical value of N is correspondingly set according to the quantity of data;
management system (6) are including display module (61), the input electric connection of display module (61) output through wire and trouble warning module (63), the input electric connection of wire and notice unit (64) is passed through to the output of trouble warning module (63), the output electric connection of wire and picture receiving module (62) is passed through to the input of display module (61), notice unit (64) are including SMS editor module (641), carry out transmission connection through communication module (642) between SMS editor module (641) and cell-phone APP (643).
2. The remote maintenance system of a substation automation system of claim 1, characterized in that: the voltage threshold module (51) is a numerical value normal range value of total pressure, partial pressure, temperature and humidity of the transformer substation.
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| CN113744479A (en) * | 2021-09-10 | 2021-12-03 | 江苏省电力试验研究院有限公司 | Power distribution station room monitoring device based on time-space data comparison and early warning method thereof |
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| EP2672353A1 (en) * | 2012-06-05 | 2013-12-11 | ABB Research Ltd. | Transformer monitoring with a mobile device |
| CN207082001U (en) * | 2017-08-31 | 2018-03-09 | 北京蓝海华业科技股份有限公司 | A kind of system for monitoring transformer station |
| CN107860097A (en) * | 2017-09-20 | 2018-03-30 | 珠海格力电器股份有限公司 | Security monitoring method and device and air conditioner with device |
| CN209895474U (en) * | 2019-04-22 | 2020-01-03 | 国网江苏省电力有限公司南通供电分公司 | Intelligent substation protection and control online safe operation analysis system |
| CN111999676A (en) * | 2020-09-03 | 2020-11-27 | 国家电网有限公司 | Electric leakage fault remote alarm system for transformer substation |
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