CN114598034A - Transformer substation monitoring system based on Internet of things technology - Google Patents

Transformer substation monitoring system based on Internet of things technology Download PDF

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Publication number
CN114598034A
CN114598034A CN202210257139.9A CN202210257139A CN114598034A CN 114598034 A CN114598034 A CN 114598034A CN 202210257139 A CN202210257139 A CN 202210257139A CN 114598034 A CN114598034 A CN 114598034A
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monitoring
internet
node
things
monitoring result
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CN202210257139.9A
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Chinese (zh)
Inventor
李印权
陶小亮
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Guangdong Botong New Energy Technology Co ltd
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Guangdong Botong New Energy Technology Co ltd
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Priority to CN202210257139.9A priority Critical patent/CN114598034A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit 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
    • H02J13/00006Circuit 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
    • H02J13/00016Circuit 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
    • H02J13/00017Circuit 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 using optical fiber
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00Scaring or repelling devices, e.g. bird-scaring apparatus
    • A01M29/16Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
    • A01M29/18Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves using ultrasonic signals
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit 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
    • H02J13/00006Circuit 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
    • H02J13/00022Circuit 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
    • H02J13/00024Circuit 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 by means of mobile telephony
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2213/00Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
    • H02J2213/10Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Birds (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Alarm Systems (AREA)

Abstract

The invention discloses a transformer substation monitoring system based on the technology of the Internet of things, which comprises an Internet of things monitoring module, a monitoring center module and a driving module; the Internet of things monitoring module comprises a wireless monitoring node and a communication base station; the wireless monitoring node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result to the communication base station; the communication base station is used for transmitting the monitoring result to the monitoring center module; the monitoring center module is used for early warning the management personnel based on the monitoring result and sending a working instruction to the driving module by the management personnel; the driving module is used for playing a preset driving record to the invading animal after receiving the working instruction. The method can avoid the influence of rain and fog weather on the detection of the invading animals, and can enable managers to process the invading animals in time, thereby ensuring the safe operation of the transformer substation.

Description

Transformer substation monitoring system based on Internet of things technology
Technical Field
The invention relates to the field of transformer substation monitoring, in particular to a transformer substation monitoring system based on the technology of the Internet of things.
Background
The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system. The substations in the power plant are step-up substations, which are used to boost up the electrical energy generated by the generator and feed it into the high-voltage network.
Because the transformer substation belongs to a high-voltage environment, the environment of the transformer substation needs to be monitored in order to maintain the normal operation of the transformer substation. In the prior art, an invading animal of a transformer substation is generally monitored and identified through a monitoring camera. However, in rain and fog weather, the sight line of the camera can be shielded, so that invasion animals in the transformer substation cannot be found in time, and the safe operation of the transformer substation is influenced.
Disclosure of Invention
The invention aims to disclose a transformer substation monitoring system based on the Internet of things technology, and solves the problems that in the prior art, invasive animals in a transformer substation cannot be timely found due to rain and fog weather, and the safe operation of the transformer substation is affected because the invasive animals in the transformer substation are monitored and identified by a monitoring camera.
In order to achieve the purpose, the invention adopts the following technical scheme:
a transformer substation monitoring system based on the technology of the Internet of things comprises an Internet of things monitoring module, a monitoring center module and a driving module;
the Internet of things monitoring module comprises a wireless monitoring node and a communication base station;
the wireless monitoring node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result to the communication base station;
the communication base station is used for transmitting the monitoring result to the monitoring center module;
the monitoring center module is used for early warning the management personnel based on the monitoring result and sending a working instruction to the driving module by the management personnel;
the driving module is used for playing a preset driving record to the invading animal after receiving the working instruction.
Preferably, the monitoring result includes the presence or absence of an invasive animal.
Preferably, the warning the manager based on the monitoring result includes:
and if the monitoring result shows that the invasive animal exists, early warning is carried out on the manager in a text prompt mode or a sound prompt mode.
Preferably, the communication base station is further configured to divide the wireless monitoring node into a general node and a relay node at fixed time intervals.
Preferably, the general node is configured to acquire a monitoring result of a preset monitoring area through a proximity sensor, and transmit the monitoring result to the relay node;
the relay node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result transmitted by the general node and the monitoring result acquired by the relay node to the communication base station.
Preferably, the dividing of the wireless monitoring node into a general node and a relay node includes:
acquiring state information of a wireless monitoring node;
calculating a performance coefficient of each wireless monitoring node based on the state information;
acquiring a set S of wireless monitoring nodes of which the performance coefficients are greater than a preset performance coefficient threshold;
and selecting the relay node from the set S according to a preset division rule.
Preferably, the state information includes a remaining power amount, coordinates, and a set of neighbor nodes.
Preferably, the transmitting the monitoring result to the monitoring center module includes:
and transmitting the monitoring result to the monitoring center module through a cellular communication network or an optical fiber network.
According to the invention, the monitoring result of the monitoring area in the transformer substation is obtained through the proximity sensor arranged on the wireless monitoring node, and the early warning is carried out on the management personnel through the monitoring center module. By means of the setting mode, the influence of rain and fog weather on detection of the invading animals can be avoided, and managers can timely handle the invading animals, so that safe operation of a transformer substation is guaranteed.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a diagram of an exemplary embodiment of an overall structure of a substation monitoring system based on the internet of things technology.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, in an embodiment, the invention provides a transformer substation monitoring system based on the internet of things technology, which includes an internet of things monitoring module, a monitoring center module and a driving module;
the Internet of things monitoring module comprises a wireless monitoring node and a communication base station;
the wireless monitoring node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result to the communication base station;
the communication base station is used for transmitting the monitoring result to the monitoring center module;
the monitoring center module is used for carrying out early warning on management personnel based on the monitoring result and sending a working instruction to the driving module by the management personnel;
the driving module is used for playing a preset driving record to the invading animal after receiving the working instruction.
According to the invention, the monitoring result of the monitoring area in the transformer substation is obtained through the proximity sensor arranged on the wireless monitoring node, and the early warning is carried out on the management personnel through the monitoring center module. By means of the setting mode, the influence of rain and fog weather on detection of the invading animals can be avoided, and managers can timely handle the invading animals, so that safe operation of a transformer substation is guaranteed.
In a further embodiment, the monitoring center module comprises an early warning unit and an instruction sending unit;
the early warning unit is used for early warning the management personnel based on the monitoring result;
the instruction sending unit is used for acquiring a working instruction which is input by a manager and used for controlling the driving module to work, and transmitting the working instruction to the driving module.
In a further embodiment, the wireless monitoring node adopts the adaptive time interval to acquire the monitoring result of the preset monitoring area through the proximity sensor.
In a further embodiment, the driving module includes sound playing devices dispersedly arranged in the substation, and the work instruction includes an ID of the sound playing device and a number of the played driving record.
And when the sound playing equipment corresponding to the ID of the sound playing equipment receives the working instruction, playing the corresponding driving record according to the number of the driving record contained in the playing instruction.
Preferably, the monitoring result includes the presence or absence of an invasive animal.
In a further embodiment, the adaptive time interval is determined by:
Figure BDA0003548844240000031
wherein, T (k) and T (k +1) respectively represent the kth time interval and the k +1 th time interval; tlst represents a preset time length; num (k) indicates the number of invasive animals in the k-th time interval, and numthr indicates the preset number threshold.
In the above embodiment, the time interval is adaptively changed along with the number of times of monitoring the invading animal, and such a setting mode is beneficial to saving the power consumption of the wireless monitoring node, so that the total working time length of the wireless monitoring node is prolonged.
Specifically, when T (k +1) is greater than the set maximum time interval maxT, the value of maxT is taken as the value of T (k + 1).
Preferably, the warning for the manager based on the monitoring result includes:
and if the monitoring result shows that the invasive animal exists, early warning is carried out on the manager in a text prompt mode or a sound prompt mode.
In a further embodiment, the text prompt includes a pop-up prompt, and the audio prompt includes a warning to the manager by playing a preset prompt recording.
Preferably, the communication base station is further configured to divide the wireless monitoring node into a general node and a relay node at fixed time intervals.
Preferably, the general node is configured to acquire a monitoring result of a preset monitoring area through a proximity sensor, and transmit the monitoring result to the relay node;
the relay node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result transmitted by the general node and the monitoring result acquired by the relay node to the communication base station.
Specifically, the general node may send the monitoring result to the relay node closest to itself.
Preferably, the dividing of the wireless monitoring node into a general node and a relay node includes:
acquiring state information of a wireless monitoring node;
calculating a performance coefficient of each wireless monitoring node based on the state information;
acquiring a set S of wireless monitoring nodes of which the performance coefficients are greater than a preset performance coefficient threshold;
and selecting the relay node from the set S according to a preset division rule.
Specifically, the communication base station sends notification information to the wireless monitoring node;
and after receiving the notification information, the wireless monitoring node sends the state information to the communication base station.
And after the division is finished, the communication base station sends the division result to the wireless monitoring node.
Preferably, the performance coefficient of the wireless monitoring node is calculated as follows:
Figure BDA0003548844240000041
wherein xnidx(s) represents the performance coefficient of the wireless monitoring node s, α1、α2、α3、α4Representing a weight coefficient, numfnei(s) representing the total number of wireless monitoring nodes within the maximum communication radius range of s, stnumfnei representing a preset number comparison value, nei(s) representing the set of wireless monitoring nodes of non-relay nodes within the maximum communication radius range of s, ehtu (t, s) representing the distance between the wireless monitoring node t and the wireless monitoring node s, stdis representing a preset distance comparison value, erleft(s) representing the remaining power of the wireless monitoring node s, erit(s) representing the full power of the wireless monitoring node s, ligststa(s) representing the minimum communication hop count between the wireless monitoring node s and a communication base station, and stligsta representing a preset communication hop count comparison value.
The communication performance of the wireless monitoring node is represented by the performance coefficient, and the larger the performance coefficient is, the more suitable the wireless monitoring node is as the relay node. When the performance coefficient is calculated, comprehensive calculation is carried out on the aspects of the total number of the wireless monitoring nodes in the maximum communication radius range, the distance between the wireless monitoring nodes and other wireless monitoring nodes in the specified range, the electric quantity, the communication water-skipping and the like. The performance coefficient can effectively represent the communication performance of the wireless monitoring node, and the accuracy of the subsequent relay node acquisition is effectively improved.
Preferably, the selecting a relay node from the set S according to a preset partitioning rule includes:
and selecting the relay nodes from the set S by adopting a gradual division mode:
step 1:
acquiring a wireless monitoring node maxnode with the largest performance coefficient from the set S, deleting the maxnode from the set S, and storing the maxnode into a relay node set midU;
step 2:
respectively calculating the division coefficient of each wireless monitoring node in the set S;
deleting the wireless monitoring node with the maximum division coefficient from the set S, and storing the wireless monitoring node with the maximum division coefficient into a relay node set midU;
the nth step:
judging whether the value of n is greater than the upper limit value of the relay node, if so, finishing the division, and taking the wireless monitoring node contained in the relay node set midU as the relay node;
if not, respectively calculating the division coefficient of each wireless monitoring node in the set S;
deleting the wireless monitoring node with the maximum division coefficient from the set S, and storing the wireless monitoring node with the maximum division coefficient into a relay node set midU;
wherein the division coefficient is calculated as follows:
Figure BDA0003548844240000051
wherein hxidx (c) represents a division coefficient of a wireless monitoring node c, phi represents a proportion parameter, phi belongs to (0,1), xnidx (c) represents a performance coefficient of the wireless monitoring node c, stxnidx represents a preset performance coefficient standard value, dist (c, d) represents the minimum communication hop count between the wireless monitoring node c and the wireless monitoring node d, and sdist represents a preset minimum communication hop count standard value,
the relay node upper limit value is calculated as follows:
Figure BDA0003548844240000061
in the formula, the sum represents the upper limit value of the relay node, the cvrS represents the total monitoring area of the transformer substation, the perS represents the standard monitoring area of the proximity sensor, the delta represents the redundancy coefficient, and the delta is greater than or equal to 1.1 and less than or equal to 1.3.
In the process of acquiring the relay nodes, the invention adopts a step-by-step acquisition mode, 1 relay node is acquired each time, and then the division coefficient of the wireless monitoring node is recalculated. When the partition coefficient is calculated, the performance coefficient and the minimum communication hop count between the wireless monitoring nodes in the relay node set are considered, so that the distribution of the relay nodes is more uniform, the energy consumption between the wireless monitoring nodes is more balanced, and the overall average working time is prolonged.
Preferably, the state information includes a remaining power amount, coordinates, and a set of neighbor nodes.
Preferably, the transmitting the monitoring result to the monitoring center module includes:
and transmitting the monitoring result to the monitoring center module through a cellular communication network or an optical fiber network.
While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
It should be noted that, functional units/modules in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules are integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of software functional units/modules.
From the above description of embodiments, it is clear for a person skilled in the art that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For a hardware implementation, a processor may be implemented in one or more of the following units: an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, other electronic units designed to perform the functions described herein, or a combination thereof. For a software implementation, some or all of the procedures of an embodiment may be performed by a computer program instructing associated hardware.
In practice, the program may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

Claims (8)

1. A transformer substation monitoring system based on the technology of the Internet of things is characterized by comprising an Internet of things monitoring module, a monitoring center module and a driving module;
the Internet of things monitoring module comprises a wireless monitoring node and a communication base station;
the wireless monitoring node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result to the communication base station;
the communication base station is used for transmitting the monitoring result to the monitoring center module;
the monitoring center module is used for early warning the management personnel based on the monitoring result and sending a working instruction to the driving module by the management personnel;
the driving module is used for playing a preset driving record to the invading animal after receiving the working instruction.
2. The substation monitoring system based on internet of things of claim 1, wherein the monitoring result comprises the presence or absence of an invasive animal.
3. The substation monitoring system based on internet of things technology of claim 2, wherein the early warning of the manager based on the monitoring result comprises:
and if the monitoring result indicates that the invasive animal exists, early warning is carried out on the manager in a text prompt or sound prompt mode.
4. The substation monitoring system based on internet of things of claim 1, wherein the communication base station is further configured to divide the wireless monitoring nodes into general nodes and relay nodes at fixed time intervals.
5. The transformer substation monitoring system based on the internet of things technology of claim 4, wherein the general node is used for acquiring a monitoring result of a preset monitoring area through a proximity sensor and transmitting the monitoring result to the relay node;
the relay node is used for acquiring a monitoring result of a preset monitoring area through the proximity sensor and transmitting the monitoring result transmitted by the general node and the monitoring result acquired by the relay node to the communication base station.
6. The substation monitoring system based on internet of things technology of claim 4, wherein the dividing of the wireless monitoring nodes into general nodes and relay nodes comprises:
acquiring state information of a wireless monitoring node;
calculating a performance coefficient of each wireless monitoring node based on the state information;
acquiring a set S of wireless monitoring nodes of which the performance coefficients are greater than a preset performance coefficient threshold;
and selecting the relay node from the set S according to a preset division rule.
7. The substation monitoring system based on internet of things of claim 6, wherein the state information comprises remaining power, coordinates and a set of neighbor nodes.
8. The substation monitoring system based on internet of things of claim 1, wherein the transmitting the monitoring result to the monitoring center module comprises:
and transmitting the monitoring result to the monitoring center module through a cellular communication network or an optical fiber network.
CN202210257139.9A 2022-03-16 2022-03-16 Transformer substation monitoring system based on Internet of things technology Pending CN114598034A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117880775A (en) * 2024-03-13 2024-04-12 吉林省吉能电力通信有限公司 Emergency wireless private network communication system for transformer substation
CN117880775B (en) * 2024-03-13 2024-06-04 吉林省吉能电力通信有限公司 Emergency wireless private network communication system for transformer substation

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Publication number Priority date Publication date Assignee Title
CN110839147A (en) * 2019-12-09 2020-02-25 云南电网有限责任公司昆明供电局 Automatic alarm and expulsion device for invasion of small animals in transformer substation
CN111528217A (en) * 2020-03-27 2020-08-14 国网浙江省电力有限公司嘉兴供电公司 Substation equipment small animal prevention system based on ubiquitous power Internet of things
CN113872333A (en) * 2021-11-10 2021-12-31 河南吉诚电力工程有限公司 Intelligent substation unattended system and method
CN113990013A (en) * 2021-12-29 2022-01-28 箭牌智能科技(张家港)有限公司 Intelligent security system based on internet of things technology

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110839147A (en) * 2019-12-09 2020-02-25 云南电网有限责任公司昆明供电局 Automatic alarm and expulsion device for invasion of small animals in transformer substation
CN111528217A (en) * 2020-03-27 2020-08-14 国网浙江省电力有限公司嘉兴供电公司 Substation equipment small animal prevention system based on ubiquitous power Internet of things
CN113872333A (en) * 2021-11-10 2021-12-31 河南吉诚电力工程有限公司 Intelligent substation unattended system and method
CN113990013A (en) * 2021-12-29 2022-01-28 箭牌智能科技(张家港)有限公司 Intelligent security system based on internet of things technology

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117880775A (en) * 2024-03-13 2024-04-12 吉林省吉能电力通信有限公司 Emergency wireless private network communication system for transformer substation
CN117880775B (en) * 2024-03-13 2024-06-04 吉林省吉能电力通信有限公司 Emergency wireless private network communication system for transformer substation

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Application publication date: 20220607