CN106899082A - A kind of protective relaying device remote diagnosis method and system - Google Patents
A kind of protective relaying device remote diagnosis method and system Download PDFInfo
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- CN106899082A CN106899082A CN201710219825.6A CN201710219825A CN106899082A CN 106899082 A CN106899082 A CN 106899082A CN 201710219825 A CN201710219825 A CN 201710219825A CN 106899082 A CN106899082 A CN 106899082A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004171 remote diagnosis Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 125
- 238000004891 communication Methods 0.000 claims abstract description 32
- 238000003745 diagnosis Methods 0.000 claims abstract description 18
- 238000005516 engineering process Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 241001269238 Data Species 0.000 claims description 2
- 238000013499 data model Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000011160 research Methods 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000002592 echocardiography Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000007488 abnormal function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
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- H02J13/0013—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
A kind of protective relaying device remote diagnosis method and system, set up its communication between device and are connected by test terminal box at the scene, and test data service centre is set up in enterprises, and public network is connected with mobile or telecommunications etc. to set up it.Data are issued test data service centre by test terminal box; data are sent to No. ID according to termination box for the client for being distributed in enterprises different zones by test data service centre of enterprise; client input command information is returned into corresponding test terminal box according to its No. ID simultaneously; debug command is handed down to protective relaying device by test terminal box; its data for returning returns to client through termination box again, so as to realize the remote fault diagnosis of protective relaying device.The method can not only realize to multiple protective relaying devices simultaneously on-line debugging, realize that many people, to carrying out Combining diagnosis with one or more protective relaying device, effectively reduce device debugging and problem diagnosis cost, effectively increase the efficiency of business processes problem.
Description
Technical field
The invention belongs to relay protection of power system testing field, more particularly to a kind of protective relaying device remote diagnosis side
Method and system.
Background technology
At present, China's power grid construction quickly grows, and Power Secondary protection equipment is also at rapid growth trend.Relay protection
Device is distributed in regional, and effect of crucial importance is played in power network safety operation.The fortune of protective relaying device
Row exception and failure behavior can influence the normal work of whole power system, or even cascade phenomenon occur, be whole power system
Bring more major break down.The people are produced these accidents and life causes inconvenience, or even bring huge economic loss.
Therefore, how protective relaying device exception or failure problems are quickly processed, Quick recovery device normally runs, is ensured
Power network safety operation is the thinking of relay protection enterprise and makes great efforts one of improved problem always.Currently, relay protection production
The protective relaying device abnormal problem processing mode that enterprise takes：Have relay protection research and develop engineer from enterprise location arrive in after
Electrical protective device location carries out abnormal problem and checks and process, along with abnormal problem process time, the commonly required time compared with
It is long, and process time is in units of day.The processing mode of current this problem, efficiency comparison is low, and CSAT is relatively low, and this gives
Corporate image brings certain negative effect.How current protective relaying device exception or accident issue handling mode is changed,
Issue handling reaction speed is improved, one satisfied answer of client is quickly given, enterprise is reduced to the protective relaying device that put into operation
Abnormal problem maintenance cost, is problem that protective relaying device manufacturing enterprise must face.
To solve the above problems, the actual design situation based on existing protective relaying device：Protective relaying device passes through more
Serial ports or network interface carry out debugging and diagnosis problem, and the present invention proposes a kind of new protective relaying device abnormal problem diagnosis side
Method：A kind of relay protection remote diagnosis method and system are come at the long range on-line debugging and problem of realizing protective relaying device
Reason.The system substantially increases the processing speed of protective relaying device abnormal problem, effectively increases the satisfaction of client, is enterprise
Industry has saved maintenance cost.
The content of the invention
The purpose of the present invention：There is plant running exception or accident issue handling mode for existing protective relaying device
Drawback：1. need engineer to arrive scene in person；2. more long the time required to issue handling, it is less efficient；3. CSAT is relatively low；
4. expense is too high, multidigit research and development engineer's Combining diagnosis, and expense is higher, and is unfavorable for the shortcomings of enterprise reduces maintenance cost, base
In the design pattern of existing protective relaying device, it is proposed that a kind of protective relaying device remote diagnosis method and system.The present invention
Efficiently solve protective relaying device and occur when plant running exception or accident that processing speed is slow, research staff must arrive live
Drawback；Diagnose simultaneously protective relaying device abnormal function for multiple research staff provide simultaneously, make to be distributed in different zones
Research staff is possibly realized to the protective relaying device quick diagnosis for having abnormal problem.
In order to solve the above technical problems, solution of the present invention is：
A kind of protective relaying device remote diagnosis method, method includes：
The communication connection set up between test terminal box and protective relaying device；
The test terminal box is set up with the server set in enterprises or public network and is connected, and login is arranged at service
Test data service centre in device；
The test data and test that the test terminal box that the reception of test data service centre is distributed in different zones is sent are whole
End box itself logon data, then the data are sent to different zones according to No. ID of test terminal box by test data service centre
Client, while by client be input into command information return to corresponding test terminal box further according to corresponding No. ID；
Test terminal box sends debug command to protective relaying device, and the data that protective relaying device is returned are whole after tested again
End box returns to client, and is processed and shown.
As present invention further optimization scheme, the test terminal box uses GRPS, 3G or 4G communication technology, test
Termination box sets SIM module, signs in test data service centre of enterprise by SIM, and submit unique ID number to enterprise to
Test data service centre, data forwarding is carried out by data service center according to No. ID.
As present invention further optimization scheme, No. ID based on test terminal box, realize many people to same or many
Platform protective relaying device carries out Combining diagnosis, test data service centre of enterprise according to the ID transceiving datas of test terminal box,
Debugging client is according to No. ID of test terminal box selection debugger object.
As present invention further optimization scheme, in many-one debugging mode, many people are input into the place of debug command parallel
Managing rule is：The order data of multiple parallel inputs is carried out according to time order and function order by test data service centre of enterprise
Data Serialization, and setting time delay transmission one by one, then the data that protective relaying device feeds back are sent to all connection dresses
The client put.
As present invention further optimization scheme, test terminal box is connected by plug type with protective relaying device
Network communication line is connected, while realizing serial communication or ethernet communication function.
The present invention a kind of protective relaying device remote diagnosis system is also provided, it is characterized in that, the system have test terminal box,
Test data service centre of enterprise, debugging groups of clients into；
Test terminal box sets up the data cube computation of protective relaying device and test data service centre of enterprise, carry out both it
Between data forwarding, test terminal box communication use GPRS, 3G or 4G mobile communication technology, using existing movement or telecommunication public network
Set up wireless data connection；
Test data service centre of enterprise is arranged in test data server, while serving test terminal box and debugging
Client, both carry out data exchange by test data server, test data service centre of enterprise both data of forwarding and
Multiple client request of data and response；
As present invention further optimization scheme, debugging client realizes device waveform display, download program, device number
Downloaded according to model read, definite value, input and the feedback of the information display function of debug command；
As present invention further optimization scheme, when debugging client connects remote device by Ethernet, in client
End test data service centre of input enterprise IP address is debugged；When being connected by serial ports, debugging client opens virtual string
Mouth is debugged.
As present invention further optimization scheme, test data service centre of enterprise according to the request of debugging client,
The debugger object of debugging client is set, an engineer is realized to multiple protective relaying devices, or multiple engineers are to one
Platform protective relaying device, or multiple engineers are to many on-line debuggings of protective relaying device.
Beneficial effects of the present invention：First, for enterprise's remote debugging protective relaying device provides implementation, will be original
The problem that could solve of scene that must arrive be converted into intra-company's solution, effectively reduce enterprise's maintenance cost, improve
The reaction speed of business processes problem；Second, for many people, quick diagnosis abnormal problem provides solution simultaneously so that many people
Diagnosing abnormal protective relaying device simultaneously becomes so efficiently and quick.Third, for a people debugs many relay protection dresses simultaneously
Put there is provided solution, research staff can be switched fast between many protective relaying devices, carry out comparing.
Brief description of the drawings
The one-to-one debugging modes of Fig. 1：One to a protective relaying device remote online diagnosis schematic diagram
Fig. 2 one-to-many debugging patterns：One people is to many protective relaying device remote online diagnosis schematic diagrames
Fig. 3 many-one debugging modes：Many people combine to a protective relaying device remote online diagnosis schematic diagram
Fig. 4 multi-to-multi debugging modes：Many people are to many protective relaying device remote online diagnosis schematic diagrames
Fig. 5 test terminals box field connection schematic diagram
Specific embodiment
The present invention efficiently solves protective relaying device, and processing speed occur when plant running exception or accident slow, researches and develops people
The drawbacks of member must arrive scene；The function of diagnosis protective relaying device exception simultaneously is provided for multiple research staff simultaneously, is made point
Cloth is possibly realized in the research staff of different zones to problematic protective relaying device quick diagnosis.
Its serial ports between device is set up by test terminal box in substation field first in technical solution of the present invention
Communication connection, on termination box after electricity can automated log on, public network device network is connected with mobile or telecommunications etc. to set up it.Have in enterprise
What portion set up hangs over the test data service centre on mobile or telecommunication public network, and reception is distributed in different zones test terminal box hair
The test data and termination box itself logon data come：Such as termination box self ID data.There is test data service centre root
The data are sent to according to termination box ID are distributed in the client of enterprises different zones and are shown, while by client software
Input command information return to corresponding test terminal box further according to its No. ID, last test termination box issues debug command
To protective relaying device, termination box returns to client software and shows the data that protective relaying device is returned after tested again.Should
Method can not only realize that a people, to multiple protective relaying devices on-line debugging simultaneously, and can realize many people to one or more
Protective relaying device carries out Combining diagnosis.
In technical solution of the present invention, test terminal box uses existing GPRS, 3G or 4G communication technology, using self-contained
SIM is realized signing in specified enterprise data server, and submits the attribute informations such as itself unique ID to enterprise data server,
Enterprise data server carries out data forwarding according to id information.
In technical solution of the present invention, many people are based on test to carrying out Combining diagnosis with one or more protective relaying device
What termination box ID uniquely set up, enterprise data server transceiving data can all have test terminal box ID labels, debug client
Be according to test terminal box ID come carry out select debugging object.
In technical solution of the present invention, in many-one debugging mode, many people are input into debug command treatment rule parallel：There is enterprise
The order data that parallel be input into multiple commissioning engineers by test data service centre carries out data sequence according to time order and function order
Rowization, and postpone certain hour transmission one by one, and the data that protective relaying device feeds back are sent to the visitors of all connection devices
Family end is realized.
In technical solution of the present invention, test terminal box is connected by plug type network communication line company with protective relaying device
Connect, realize serial communication or network service.During using serial communication, test terminal box serial communication parameter setting and device serial ports
Communications parameter sets and must be consistent.Virtual serial port technology is that serial data will be tested by TCP communication by bottom layer driving
Realized according to test data service centre is transmitted to.
In technical solution of the present invention, the system has test terminal box, test data service centre of enterprise, debugging groups of clients
Into.Test terminal box sets up the data cube computation of protective relaying device and test data service centre of enterprise, carries out between the two
Data forwarding, test terminal box communication uses GPRS, 3G or 4G communication mechanism, sets up wireless using existing movement or telecommunication public network
Data cube computation.Test data service centre of enterprise is data server, services two objects：One is test terminal box, one
It is debugging client, is responsible for both forwarding data and multiple client request of data and responses.
In technical solution of the present invention, debugging client realizes device waveform display, and download program, device data model reads
And definite value download function, be provided simultaneously with debug command directly inputs function；
In technical solution of the present invention, foundation can be according to debugging client in the test data service centre of enterprises
Request flexibly sets the debugger object of debugging client, realizes that (engineer, multiple relays are protected for one-to-many equipment on-line debugging
Protection unit) or the debugging of many-one (multiple engineers, a protective relaying device) high degree of flexibility.
The specific implementation method that the invention will now be described in detail with reference to the accompanying drawings.Fig. 1 is for based on a pair for developing of the invention
One RD Mode data flow schematic diagram.Fig. 2 is the one-to-many RD Mode data flow developed based on the present invention
To schematic diagram.Fig. 3 is the many-one RD Mode data flow schematic diagram developed based on the present invention.Fig. 4 is based on this
The multi-to-multi RD Mode data flow schematic diagram invented and develop.
One-to-one debugging mode：
1. test terminal box is connected on device by plug type connection at the scene, with reference to Fig. 5 modes of connection, adopted
The serial communication parameter of device and test terminal box need to be consistent with serial communication, and ensure that test terminal box has inserted SIM
Card；
2. by electricity on the box of test terminal；
3. there is Field Force to tell remote operation engineer for No. ID by test terminal box；
4. remote operation engineer opens debugging client software, test data service centre of connection enterprise；
5. remote operation engineer carries out protective relaying device and selects and debug according to No. ID；
6. corresponding protective relaying device test command is input into client to be debugged, or reading device waveform, read-write dress
Definite value is put, the operation such as download；
7. client echoes data.
One-to-many debugging pattern：
1. test terminal box is connected on device by plug type connection at the scene, with reference to Fig. 5 modes of connection, adopted
The serial communication parameter of device and test terminal box need to be consistent with serial communication, and ensure that test terminal box has inserted SIM
Card；
2. by electricity on the box of test terminal；
3. there is Field Force to tell remote operation engineer for No. ID by multiple test terminal boxes；
4. remote operation engineer opens debugging client software, test data service centre of connection enterprise；
5. remote operation engineer carries out protective relaying device and selects and open multiple Debugging interfaces according to multiple No. ID；
6. corresponding protective relaying device test command is input into client to be debugged, or reading device waveform, read-write dress
Definite value is put, the operation such as download；
7. client echoes data.
Many-one debugging mode：
1. test terminal box is connected on device by plug type connection at the scene, with reference to Fig. 5 modes of connection, adopted
The serial communication parameter of device and test terminal box need to be consistent with serial communication, and ensure that test terminal box has inserted SIM
Card；
2. by electricity on the box of test terminal；
3. there is Field Force to tell remote operation engineer for No. ID by test terminal box；
4. many remote operation engineers open debugging client software, test data service centre of connection enterprise；
5. remote operation engineer selects protective relaying device, and open Debugging interface according to No. ID；
6. corresponding protective relaying device test command is input into client to be debugged, or reading device waveform, read-write dress
Definite value is put, the operation such as download；
7. client echoes data.
Multi-to-multi debugging mode：
1. test terminal box is connected on device by plug type connection at the scene, with reference to Fig. 5 modes of connection, adopted
The serial communication parameter of device and test terminal box need to be consistent with serial communication, and ensure that test terminal box has inserted SIM
Card；
2. by electricity on the box of test terminal；
3. there is Field Force to tell remote operation engineer for No. ID by test terminal box；
4. many remote operation engineers open debugging client software, test data service centre of connection enterprise；
5. the protective relaying device of known No. ID of remote operation engineer selection, and open Debugging interface；
6. corresponding protective relaying device test command is input into client to be debugged, or reading device waveform, read-write dress
Definite value is put, the operation such as download；
7. client echoes data.
Above example is only explanation technological thought of the invention, it is impossible to limit protection scope of the present invention with this, every to press
According to technological thought proposed by the present invention, any change is done on the basis of technical scheme, each fallen within the scope of the present invention.
Claims (8)
1. a kind of protective relaying device remote diagnosis method, it is characterised in that method includes：
The communication connection set up between test terminal box and protective relaying device；
The test terminal box is set up with the server set in enterprises or public network and is connected, and login is arranged in server
Test data service centre；
Test data service centre receives and is distributed in test data and the test terminal box that the test terminal box of different zones is sent
Itself logon data, then by test data service centre according to No. ID visitor that the data are sent to different zones of test terminal box
Family end, while the command information that client is input into is returned into corresponding test terminal box further according to corresponding No. ID；
Test terminal box sends debug command to protective relaying device, the data that protective relaying device is returned termination box after tested again
Client is returned to, and is processed and is shown.
2. a kind of protective relaying device remote diagnosis method according to claim 1, it is characterised in that：The test terminal
Box uses GRPS, 3G or 4G communication technology, and test terminal box sets SIM module, enterprise's test data is signed in by SIM
Service centre, and submit unique ID number to test data service centre of enterprise to, carry out data according to No. ID by data service center
Forwarding.
3. a kind of protective relaying device remote diagnosis method according to claim 1, it is characterised in that：Based on test terminal
No. ID of box, realizes many people to carrying out Combining diagnosis, test data service centre of enterprise with one or more protective relaying device
ID transceiving datas according to test terminal box, debugging client is according to No. ID of test terminal box selection debugger object.
4. a kind of protective relaying device remote diagnosis method according to claim 3, it is characterised in that：Many-one debugs mould
In formula, the treatment rule that many people are input into debug command parallel is：Multiple is input into parallel by test data service centre of enterprise
Order data carries out Data Serialization, and setting time delay transmission one by one, then relay protection is filled according to time order and function order
The data for putting feedback are sent to the client of all connection devices.
5. a kind of protective relaying device remote diagnosis method according to claim 1, it is characterised in that：Test terminal box with
The plug type network communication line that is connected by of protective relaying device is connected, while realizing serial communication or ethernet communication work(
Energy.
6. a kind of protective relaying device remote diagnosis system, it is characterised in that：The system includes that test terminal box, enterprise are tested
Data service center and debugging client；
Test terminal box sets up the data cube computation of protective relaying device and test data service centre of enterprise, carries out between the two
Data forwarding, test terminal box communication uses GRPS, 3G or 4G communication mechanism, and wireless data is set up using mobile or telecommunication public network
Connection；
Test data service centre of enterprise is arranged in test data server, while serving test terminal box and debugging client
End, both carry out both data exchange, the forwarding of test data service centre of enterprise data and multiples by test data server
Client data request and response；
Debugging client realizes that device waveform display, download program, device data model are read, definite value is downloaded, debug command
Input and feedback of the information display function.
7. a kind of protective relaying device remote diagnosis system according to claim 6, it is characterised in that：Debugging client is led to
When crossing Ethernet connection remote device, in test data service centre of client input enterprise, IP address is debugged；By string
During mouth connection, debugging client is opened virtual serial port and is debugged.
8. a kind of protective relaying device remote diagnosis system according to claim 6, it is characterised in that：Enterprise's test data
Service centre according to debugging client request, set debugging client debugger object, realize an engineer to multiple after
Electrical protective device, or multiple engineers are to a protective relaying device, or multiple engineers are to many protective relaying devices
On-line debugging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219825.6A CN106899082A (en) | 2017-04-06 | 2017-04-06 | A kind of protective relaying device remote diagnosis method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219825.6A CN106899082A (en) | 2017-04-06 | 2017-04-06 | A kind of protective relaying device remote diagnosis method and system |
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| CN106899082A true CN106899082A (en) | 2017-06-27 |
Family
ID=59192686
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| CN201710219825.6A Pending CN106899082A (en) | 2017-04-06 | 2017-04-06 | A kind of protective relaying device remote diagnosis method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109059198A (en) * | 2018-07-23 | 2018-12-21 | 珠海格力电器股份有限公司 | Automatic engineering debugging method, device and system for equipment and computer equipment |
| CN109520074A (en) * | 2018-09-30 | 2019-03-26 | 佛山市中格威电子有限公司 | A kind of intelligent regulator system and method for air-conditioning equipment |
| CN112034825A (en) * | 2020-09-08 | 2020-12-04 | 上海星融汽车科技有限公司 | Vehicle cloud diagnostic system |
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Application publication date: 20170627 |