CN113991868A - Distribution network automation terminal regular inspection method - Google Patents
Distribution network automation terminal regular inspection method Download PDFInfo
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- CN113991868A CN113991868A CN202111361194.4A CN202111361194A CN113991868A CN 113991868 A CN113991868 A CN 113991868A CN 202111361194 A CN202111361194 A CN 202111361194A CN 113991868 A CN113991868 A CN 113991868A
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- distribution network
- terminal
- inspection equipment
- regular inspection
- automatic terminal
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- 238000007689 inspection Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000011664 signaling Effects 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000012423 maintenance Methods 0.000 claims abstract description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a distribution network automation terminal regular inspection method, which comprises the following steps: the method comprises the steps of accessing an automatic terminal of the power distribution network to be detected, setting a measurement and control fixed value detected by the regular inspection equipment, confirming the connection state of the regular inspection equipment and the terminal to be detected, starting detection and waiting for the completion of the detection, and displaying detected fault information and fault codes on a liquid crystal screen by the regular inspection equipment. The network distribution automation terminal regular inspection method provided by the invention has the beneficial effects that: according to the method for calibrating the distribution network automatic terminal, the voltage, the current, the remote signaling and the remote control loop of the distribution network automatic terminal are automatically detected through the regular inspection equipment, the fault reason is analyzed according to the detection data, the efficient regular inspection of operation and maintenance personnel is realized, and convenience is provided for the regular inspection, the maintenance and the fault treatment of the equipment.
Description
Technical Field
The invention relates to the technical field of verification and detection of power grid automatic terminals, in particular to a regular verification method of a distribution network automatic terminal.
Background
Along with the distribution and power supply enterprises provide electric energy for the society, the reliability and the safety of the operation of a power grid are guaranteed, and the occurrence of power transformation safety accidents is avoided. A large amount of distribution automation terminals are put into use, and some automation terminals begin to have defects and faults of different degrees, however, most of the automation professionals are still in the construction and use stages of the automation terminals at present, the experience of processing the defects in the terminals is low, the time for troubleshooting is long, and the time period for coordinating the processing of technicians of corresponding manufacturers is also long. Therefore, the method and the device have the advantages that rapid regular inspection is carried out on the automatic terminal of the power distribution network, the fault reason is detected and ascertained in time, the error information is displayed, operation and maintenance personnel are helped to rapidly judge the fault category and shift to the fault processing stage as soon as possible, and the method and the device are important means for improving the timeliness of fault processing, reducing the vacuum period of protection interruption and improving the operation reliability of the power network.
At present, most of the processing methods for the faults of the automatic terminals of the power distribution network contact manufacturers and wait for the manufacturers to come and process, and the fault processing timeliness is very low.
Disclosure of Invention
The invention provides a distribution network automation terminal regular inspection method to solve the problems in the background technology.
The regular inspection method for the distribution network automatic terminal comprises the following steps:
s1: standard aviation plugs and communication lines of the regular inspection equipment are connected to the automatic terminal of the distribution network to be inspected according to the convention;
s2: setting measurement and control fixed values such as analog quantity sampling rated values, remote signaling quantity, remote signaling anti-shake time, remote control holding time, voltage-current transformation ratio and the like of the distribution network automatic terminal to be detected on the fixed detection equipment;
s3: the scheduled inspection equipment outputs voltage through an aviation plug and drives the distribution network automatic terminal to be inspected to operate, and the scheduled inspection equipment acquires a group of distribution network automatic terminal total calling messages through serial port communication and confirms the connection state;
s4: starting the automatic detection of the scheduled inspection equipment, applying voltage and current to the distribution network automatic terminal, obtaining the current remote measurement through the total communication call of the scheduled inspection equipment and the burst message information of the distribution network automatic terminal after the numerical value is stable, and comparing the current remote measurement with the applied remote measurement to judge whether voltage and current loops are abnormal or not;
s5: the fixed inspection equipment drives the relay switching-on and switching-off to apply a remote signaling variable to the distribution network automatic terminal, the current remote signaling quantity is obtained through the burst message information of the distribution network automatic terminal, and the current remote signaling quantity is compared with the applied remote signaling variable to judge whether a remote signaling loop is abnormal or not;
s6: the fixed inspection equipment drives the analog circuit breaker on the fixed inspection equipment through switching on and off of a relay of the automatic terminal of the remote control distribution network, and judges whether a remote control loop of the automatic terminal of the distribution network is normal or not through the change of a remote signaling quantity acquired on the fixed inspection equipment;
s7: after the scheduled inspection equipment automatically detects, compares and analyzes data, the detection result and the fault code thereof are displayed on a local liquid crystal screen in detail, and diagnosis opinions and a suggested processing mode are provided for operation and maintenance personnel.
Preferably: the aviation plug is an industry standard aviation plug and is at least one of a 14-core aviation plug, a 6-core aviation plug and a 3-core aviation plug.
Preferably: the serial port communication is an RS232 interface.
Preferably: the communication protocol is standard Guangxi version/south China halftone 101 communication.
Preferably: the fault information detected by the detection equipment can also be transmitted to a far-end background for storage in a 4G wireless transmission mode.
The network distribution automation terminal regular inspection method provided by the invention has the beneficial effects that: according to the method for calibrating the distribution network automatic terminal, the voltage, the current, the remote signaling and the remote control loop of the distribution network automatic terminal are automatically detected through the regular inspection equipment, the fault reason is analyzed according to the detection data, the efficient regular inspection of operation and maintenance personnel is realized, and convenience is provided for the regular inspection, the maintenance and the fault treatment of the equipment.
Detailed Description
The invention is further illustrated by the following examples.
Examples
The invention provides a distribution network automation terminal regular inspection method, which comprises the following steps:
s1: the method comprises the following steps that a standard aviation plug and a communication line of a scheduled inspection device are connected to an automatic terminal of a power distribution network to be inspected according to convention, the aviation plug is an industry standard aviation plug, and the aviation plug is at least one of a 14-core aviation plug, a 6-core aviation plug and a 3-core aviation plug;
s2: setting measurement and control fixed values such as analog quantity sampling rated values, remote signaling quantity, remote signaling anti-shake time, remote control holding time, voltage-current transformation ratio and the like of the distribution network automatic terminal to be detected on the fixed detection equipment;
s3: the automatic terminal of the distribution network to be detected is driven to operate by the regular inspection equipment through the output voltage of the aviation plug, a group of automatic terminals of the distribution network are obtained by the regular inspection equipment through serial port communication, the connection state is confirmed, and the serial port communication is an RS232 interface. The communication protocol is standard Guangxi version/south screen 101 communication;
s4: starting the automatic detection of the scheduled inspection equipment, applying voltage and current to the distribution network automatic terminal, obtaining the current remote measurement through the total communication call of the scheduled inspection equipment and the burst message information of the distribution network automatic terminal after the numerical value is stable, and comparing the current remote measurement with the applied remote measurement to judge whether voltage and current loops are abnormal or not;
s5: the fixed inspection equipment drives the relay switching-on and switching-off to apply a remote signaling variable to the distribution network automatic terminal, the current remote signaling quantity is obtained through the burst message information of the distribution network automatic terminal, and the current remote signaling quantity is compared with the applied remote signaling variable to judge whether a remote signaling loop is abnormal or not;
s6: the fixed inspection equipment drives the analog circuit breaker on the fixed inspection equipment through switching on and off of a relay of the automatic terminal of the remote control power distribution network, whether a remote control loop of the automatic terminal of the power distribution network is normal is judged through the change of a remote signaling quantity acquired on the fixed inspection equipment, all detection items are compared with a standard value through a measured value, errors in the detection process are considered, if the errors are within a set reasonable range, the judgment result is normal, otherwise, the judgment result is abnormal;
s7: the regular inspection equipment displays the detection result and the fault code thereof on a local liquid crystal screen in detail after automatically detecting, comparing and analyzing data, gives a diagnosis suggestion and a suggested processing mode to operation and maintenance personnel, and transmits the fault information detected by the detection equipment to a remote background for storage in a 4G wireless transmission mode.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The network distribution automation terminal regular inspection method is characterized by comprising the following steps:
s1: standard aviation plugs and communication lines of the regular inspection equipment are connected to the automatic terminal of the distribution network to be inspected according to the convention;
s2: setting measurement and control fixed values such as analog quantity sampling rated values, remote signaling quantity, remote signaling anti-shake time, remote control holding time, voltage-current transformation ratio and the like of the distribution network automatic terminal to be detected on the fixed detection equipment;
s3: the scheduled inspection equipment outputs voltage through an aviation plug and drives the distribution network automatic terminal to be inspected to operate, and the scheduled inspection equipment acquires a group of distribution network automatic terminal total calling messages through serial port communication and confirms the connection state;
s4: starting the automatic detection of the scheduled inspection equipment, applying voltage and current to the distribution network automatic terminal, obtaining the current remote measurement through the total communication call of the scheduled inspection equipment and the burst message information of the distribution network automatic terminal after the numerical value is stable, and comparing the current remote measurement with the applied remote measurement to judge whether voltage and current loops are abnormal or not;
s5: the fixed inspection equipment drives the relay switching-on and switching-off to apply a remote signaling variable to the distribution network automatic terminal, the current remote signaling quantity is obtained through the burst message information of the distribution network automatic terminal, and the current remote signaling quantity is compared with the applied remote signaling variable to judge whether a remote signaling loop is abnormal or not;
s6: the fixed inspection equipment drives the analog circuit breaker on the fixed inspection equipment through switching on and off of a relay of the automatic terminal of the remote control distribution network, and judges whether a remote control loop of the automatic terminal of the distribution network is normal or not through the change of a remote signaling quantity acquired on the fixed inspection equipment;
s7: after the scheduled inspection equipment automatically detects, compares and analyzes data, the detection result and the fault code thereof are displayed on a local liquid crystal screen in detail, and diagnosis opinions and a suggested processing mode are provided for operation and maintenance personnel.
2. The network automation terminal scheduled inspection method of claim 1, wherein: the aviation plug is an industry standard aviation plug and is at least one of a 14-core aviation plug, a 6-core aviation plug and a 3-core aviation plug.
3. The network automation terminal scheduled inspection method of claim 1, wherein: the serial port communication is an RS232 interface.
4. The network automation terminal scheduled inspection method of claim 1, wherein: the communication protocol is standard Guangxi version/south China halftone 101 communication.
5. The network automation terminal scheduled inspection method of claim 1, wherein: the fault information detected by the detection equipment can also be transmitted to a far-end background for storage in a 4G wireless transmission mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111361194.4A CN113991868A (en) | 2021-11-17 | 2021-11-17 | Distribution network automation terminal regular inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111361194.4A CN113991868A (en) | 2021-11-17 | 2021-11-17 | Distribution network automation terminal regular inspection method |
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| Publication Number | Publication Date |
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| CN113991868A true CN113991868A (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111361194.4A Pending CN113991868A (en) | 2021-11-17 | 2021-11-17 | Distribution network automation terminal regular inspection method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297631A (en) * | 2014-09-28 | 2015-01-21 | 上海金智晟东电力科技有限公司 | Fault diagnosis device and diagnosis and maintenance method for ring main unit power distribution terminal |
| CN207215917U (en) * | 2017-08-09 | 2018-04-10 | 国网山东省电力公司济宁供电公司 | A kind of distribution automation terminal comprehensive debugging device |
-
2021
- 2021-11-17 CN CN202111361194.4A patent/CN113991868A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297631A (en) * | 2014-09-28 | 2015-01-21 | 上海金智晟东电力科技有限公司 | Fault diagnosis device and diagnosis and maintenance method for ring main unit power distribution terminal |
| CN207215917U (en) * | 2017-08-09 | 2018-04-10 | 国网山东省电力公司济宁供电公司 | A kind of distribution automation terminal comprehensive debugging device |
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