CN110072024A - A kind of Dual module modem apparatus and the control system with it - Google Patents
A kind of Dual module modem apparatus and the control system with it Download PDFInfo
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- CN110072024A CN110072024A CN201910451910.4A CN201910451910A CN110072024A CN 110072024 A CN110072024 A CN 110072024A CN 201910451910 A CN201910451910 A CN 201910451910A CN 110072024 A CN110072024 A CN 110072024A
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- 230000009977 dual effect Effects 0.000 title claims abstract description 43
- 230000011664 signaling Effects 0.000 claims abstract description 17
- 238000007689 inspection Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 7
- 230000008030 elimination Effects 0.000 abstract description 7
- 238000003379 elimination reaction Methods 0.000 abstract description 7
- 238000004891 communication Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- H02J13/0013—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Telephonic Communication Services (AREA)
Abstract
The invention discloses a kind of Dual module modem apparatus and with its control system, which includes the first modem, second modem, the first power module, second power supply module and switching module;Switching module includes power supply switching circuit, is remotely controlled to open and outputs contact into contact and remote signalling;The output end of power supply switching circuit includes normally closed contact and normal opened contact;One end of first power module is connect with the input terminal of the first modem, and the other end is connect with normally closed contact;One end of second power supply module and the input terminal of second modem connect, and the other end is connect with normal opened contact.The present invention can be when scheduling station monitors plant stand modem failure, starting switching module, which is remotely controlled, in scheduling station exits faulty modem, put into spare modem, to the remote repairing of telemechanical special line channel interrupt when completion modem failure, defect elimination operating efficiency is improved, the scene rush to repair operation of teams and groups is reduced.
Description
Technical field
The present embodiments relate to substation automation system telemechanical fields of communication technology more particularly to a kind of Dual module to modulate
Modem device and control system with it.
Background technique
The different communication channels composition redundancy communication modes of two sets of common configuration of the telemechanical communication of substation automation system, two
The network in telecontrol channel that is made of respectively electricity secondary safety protection equipment of set communication pattern and by modem and telemechanical
The telemechanical special line channel of special line network of channels composition, in the technology applied at present, the modem independent operating at plant stand end, not by
Peripheral equipment control.
The telemechanical special line communication outage of substation automation system belongs to common equipment significant deficiency.According to dependency number
The reason of result is learnt according to statistics, the telemechanical special line channel interrupt failure of substation automation system includes: telecontrol device failure, plant stand
4 major class such as modem failure, scheduling station demodulator failure and special line channel network failure;Wherein, plant stand modulation /demodulation
The main reason for device failure accounts for the 80% of sum, is telemechanical special line channel interrupt failure.
It is provided according to related management, equipment significant deficiency need to arrange teams and groups personnel that substation field is gone to rob when occurring
Operation is repaired, repairing operation time-consuming includes travel time, time and in-situ processing time, time-consuming for defect elimination;Not only repair work
It not only will increase the operating cost of enterprise, also will increase the work load of teams and groups, base.
Summary of the invention
The present invention provides a kind of Dual module modem apparatus and the control system with it, to solve the prior art
It is insufficient.
To achieve the above object, the present invention provides technical solution below:
In a first aspect, the embodiment of the present invention provides a kind of Dual module modem apparatus, including the first modem,
Second modem, the first power module, second power supply module and switching module;
The switching module includes power supply switching circuit, is remotely controlled to open and outputs contact into contact and remote signalling;
The input terminal of the power supply switching circuit is power input, and the output end of the power supply switching circuit includes normally closed
Contact and normal opened contact;
One end of first power module is connect with the input terminal of first modem, the other end and it is described often
Close contact connection;
One end of the second power supply module is connect with the input terminal of the second modem, the other end and it is described often
Open contact connection;
The output end of first modem and the output end of the second modem simultaneously connect;
Contact is opened in the remote control and remote signalling outputs contact and outputs contact and distant with the remote control on public measure and control device respectively
Letter is opened to be connected into contact;
The power supply switching circuit is used to receive the switching signal from the public measure and control device, and according to the switching
First modem is switched to the state of exiting by investment state by signal, and is adjusted according to the switching signal by described second
Modulator-demodulator is switched to investment state by stand-by state;
The power supply switching circuit is also used to for the working condition of the second modem being sent to remote signals
The public measure and control device.
Further, in the Dual module modem apparatus, the switching module is provided with circuit involution button.
Further, in the Dual module modem apparatus, the power supply switch circuit includes the first relay circuit
With the second relay circuit;
First relay circuit is for receiving the switching signal, and according to switching signal control control described the
Two relay circuits are connect with the power input, so that the second modem is switched to investment shape by stand-by state
State.
Further, in the Dual module modem apparatus, first relay circuit includes the first relay, institute
Stating the first relay includes the first common end, the first normal opened contact corresponding with first common end, the second common end and institute
State corresponding second normal opened contact in the second common end;
First common end and the second common end are connect with the power input, the coil of first relay
It opens with the remote control and is connect into contact and first normal opened contact respectively, another described second normal opened contact and described second
Relay circuit connection;
When the remote control is opened into junction closure, the coil of first relay obtains electric, first common end and institute
The first normal opened contact closure is stated, forms self-holding circuit, and second common end and second normal opened contact are closed.
Further, in the Dual module modem apparatus, second relay circuit includes the second relay, the
Three relays and the 4th relay;
The coil of second relay, third relay and the 4th relay is connect with second normal opened contact;
Behind second common end and second normal opened contact closure, second relay, third relay
Common end is connect with the power input, and the normally closed contact of second relay and third relay is with described first
The input terminal of power module connects, the normal opened contact of second relay and third relay with the second power supply module
Input terminal connection;
Second common end and second normal opened contact closure after, the common end of the 4th relay with it is described
The remote signalling power supply common end of public measure and control device connects, and contact company is outputed in the normal opened contact of the 4th relay and the remote signalling
It connects, and then opens with the remote signalling on the public measure and control device and connect into contact.
Further, in the Dual module modem apparatus, the analog channel of first modem open into
It opens into and connects with the analog channel of the second modem, the modulation output and described second of first modem
The modulation of modem is exported and is connect.
Second aspect, the embodiment of the present invention provide a kind of control system of Dual module modem apparatus, including scheduling
Main website, telecontrol device, public measure and control device and Dual module modem apparatus as described in relation to the first aspect;
The scheduling station is connect by network in telecontrol channel with the telecontrol device, and telemechanical special line channel and described pair are passed through
The connection of module modem apparatus;The public measure and control device respectively with the telecontrol device and Dual module modem apparatus
Connection;
The scheduling station is used to send switching command to the telecontrol device by the network in telecontrol channel;
The switching command is exported to the public observing and controlling and is filled for receiving the switching command by the telecontrol device
It sets;
The public measure and control device is used to generate switching signal according to the switching command, and the switching signal is exported
To the Dual module modem apparatus;
The Dual module modem apparatus is used to be completed according to the switching signal to first modem
With the switching of the working condition of second modem;And it is used for first modem and second modem
Working condition be sent to the public measure and control device with remote signals;
The public measure and control device is also used to receive the remote signals, and generates indication signal according to the remote signals
It is sent to the telecontrol device;
The telecontrol device is also used to receive the indication signal, and by the network in telecontrol channel by the indication signal
It is sent to the scheduling station.
Further, the control system of the Dual module modem apparatus further includes secondary security device;
The secondary security device is arranged between the scheduling station and telecontrol device, for receiving the scheduling station hair
Switching command out carries out safety inspection to the switching command, and will be sent to by the switching command of safety inspection
The telecontrol device.
A kind of Dual module modem apparatus provided in an embodiment of the present invention and the control system with it, can adjust
When degree main website monitors plant stand modem failure, remote control starting switching module exits faulty modem, puts into spare
Modem improves defect elimination operation effect to the remote repairing of telemechanical special line channel interrupt when completing modem failure
Rate reduces the scene rush to repair operation of teams and groups.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram for Dual module modem apparatus that the embodiment of the present invention one provides;
Fig. 2 is the structural schematic diagram of power supply switch circuit in the embodiment of the present invention one;
Fig. 3 is a kind of structural representation of the control system of Dual module modem apparatus provided by Embodiment 2 of the present invention
Figure.
Appended drawing reference:
First modem 10, second modem 20, the first power module 30, second power supply module 40, switching
Module 50;
Scheduling station 100, telecontrol device 200, public measure and control device 300, Dual module modem apparatus 400, secondary peace
Anti- equipment 500.
Specific embodiment
To enable the purpose of the present invention, feature, advantage more obvious and understandable, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that reality disclosed below
Applying example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it is to be understood that, when a component is considered as " connection " another component, it can
To be directly to another component or may be simultaneously present the component being centrally located.When a component is considered as " setting
Set " another component, it, which can be, is set up directly on another component or may be simultaneously present the component being centrally located.
In addition, the indicating positions such as term " length " " short " "inner" "outside" or positional relationship for the orientation that is shown based on attached drawing or
Person's positional relationship is merely for convenience of the description present invention, rather than the device or original part of indication or suggestion meaning must have this
Specific orientation is operated with specific orientation construction, should not be understood as limitation of the invention with this.
Embodiment one
It is learnt according to the survey data that plant stand modem failure is replaced, the main reason for plant stand modem failure
Be device power module due to long-play ageing failure, replacing power module or modem can complete
90% modem failure defect elimination, to solve the defect elimination of 90% plant stand telemechanical special line channel failure.
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Fig. 1~2 are please referred to, the embodiment of the present invention provides a kind of Dual module modem apparatus, includes the first modulation /demodulation
Device 10, second modem 20, the first power module 30, second power supply module 40 and switching module 50;
The switching module 50 includes power supply switching circuit, is remotely controlled to open and outputs contact into contact and remote signalling;
The input terminal of the power supply switching circuit is power input, and the output end of the power supply switching circuit includes normally closed
Contact and normal opened contact;
One end of first power module 30 is connect with the input terminal of first modem 10, the other end and institute
State normally closed contact connection;
One end of the second power supply module 40 is connect with the input terminal of the second modem 20, the other end and institute
State normal opened contact connection;
The output end of the output end of first modem 10 and the second modem 20 simultaneously connects;
Contact is opened in the remote control and remote signalling outputs contact and outputs contact and distant with the remote control on public measure and control device respectively
Letter is opened to be connected into contact;
The power supply switching circuit is used to receive the switching signal from the public measure and control device, and according to the switching
First modem 10 is switched to the state of exiting by investment state by signal, and according to the switching signal by described second
Modem 20 is switched to investment state by stand-by state;
The power supply switching circuit is also used to send the working condition of the second modem 20 with remote signals
To the public measure and control device.
It should be noted that the present invention is using respectively independent two modulation /demodulation powered using individual power module
Device controls the investment of two power modules by switching module 50 and exits, thus the investment of two modems of control and
It exits.Under normal circumstances, the first power module 30 it is electric, the first modem 10 is in investment state, at the same time second
40 power loss of power module, second modem 20 are in stand-by state.When there is outage in telemechanical special line channel, scheduling
Main website remote control starting switching module 50 exits the first power module 30, puts into second power supply module 40, so that the second modulation
Demodulator 20 switchs to operating status by stand-by state, and the first modem 10 is switched to exit state by operating status.
Preferably, the switching module 50 is provided with circuit involution button.
The power supply switch circuit includes the first relay circuit and the second relay circuit;
First relay circuit is for receiving the switching signal, and according to switching signal control control described the
Two relay circuits are connect with the power input, so that the second modem 20 is switched to investment by stand-by state
State.
As shown in Fig. 2, first relay circuit includes the first relay, first relay includes first public
It is end and corresponding first normal opened contact in first common end, the second common end, corresponding with second common end second normal
Open contact;(the first common end and the first normal opened contact are indicated with K1 in Fig. 2, indicate that the second common end and second normally opened connects with K1 '
Point)
First common end and the second common end are connect with the power input, the coil of first relay
Contact (indicating in Fig. 2 with K0) is opened and first normal opened contact is connect with the remote control respectively, another is described second normal
Contact is opened to connect with second relay circuit;
When the remote control is opened into junction closure, the coil of first relay obtains electric, first common end and institute
The first normal opened contact closure is stated, forms self-holding circuit, and second common end and second normal opened contact are closed.
It should be noted that the operating voltage of first relay is direct current 110V/220V, the remote control is opened into contact
The time of closure is 200ms;K0 ' indicates circuit involution button in Fig. 2, for teams and groups to the return behaviour in circuit when in-situ processing
Make.
Preferably, second relay circuit includes the second relay, third relay and the 4th relay;
The coil of second relay, third relay and the 4th relay is connect with second normal opened contact;
Behind second common end and second normal opened contact closure, second relay, third relay
Common end is connect with the power input, and the normally closed contact of second relay and third relay is with described first
The input terminal of power module 30 connects, the normal opened contact of second relay and third relay with the second source mould
The input terminal of block 40 connects;
Second common end and second normal opened contact closure after, the common end of the 4th relay with it is described
The remote signalling power supply common end of public measure and control device connects, and contact company is outputed in the normal opened contact of the 4th relay and the remote signalling
It connects, and then opens with the remote signalling on the public measure and control device and connect into contact.
It should be noted that the operating voltage of second relay, third relay and the 4th relay is direct current
110V/220V;Second relay, third relay common end connect power input (direct current 110V/220V) respectively
Anode and cathode, the normally closed contact of the second relay connect the input anode of 10 first power module 30 of the first modem, the
Two relay normally open contacts connect the input anode of 20 second power supply module 40 of second modem;Third relay normally closed contact
The input cathode of 10 first power module 30 of the first modem is connect, third relay normally open contact connects second modem
The input cathode of 20 second power supply modules 40;State after 4th relay puts into operation for second modem 20 is defeated
Out.
When scheduling station is remotely controlled K0 closure, first actuating of relay is formed simultaneously self-holding circuit, after K1 ' is connected, second
Relay, third relay energized action disconnect normally closed contact, closure normal opened contact, complete the first modem 10 first
Power module 30 exit and the investment of 20 second power supply module 40 of second modem.4th relay simultaneously operation,
Normal opened contact closure, will be sent in switching action situation to scheduling station by public measure and control device.
Preferably, the analog channel of first modem 10 is opened into the simulation with the second modem 20
Channel is opened into and is connect, and the modulation output of first modem 10 and the modulation of the second modem 20 export simultaneously
It connects.
A kind of Dual module modem apparatus provided in an embodiment of the present invention can monitor plant stand tune in scheduling station
When modulator-demodulator failure, remote control starting switching module exits faulty modem, puts into spare modem, completes modulation
To the remote repairing of telemechanical special line channel interrupt when demodulator failure, defect elimination operating efficiency is improved, reduces the scene of teams and groups
Repair operation.
Embodiment two
Referring to FIG. 3, the embodiment of the present invention provides a kind of control system of Dual module modem apparatus, including scheduling
Main website 100, telecontrol device 200, public measure and control device 300 and the Dual module modem apparatus 400 as described in embodiment one;
The scheduling station 100 is connect by network in telecontrol channel with the telecontrol device 200, by telemechanical special line channel and
The Dual module modem apparatus 400 connects;The public measure and control device 300 respectively with the telecontrol device 200 and bimodulus
Block modem apparatus 400 connects;
The scheduling station 100 is used to send switching command to the telecontrol device 200 by the network in telecontrol channel;
The telecontrol device 200 exports the switching command to the public observing and controlling for receiving the switching command
Device 300;
The public measure and control device 300 is used to generate switching signal according to the switching command, and by the switching signal
It exports to the Dual module modem apparatus 400;
The Dual module modem apparatus 400 is used to be completed according to the switching signal to first modulation /demodulation
The switching of the working condition of device and second modem;And it is used for first modem and the second modulation /demodulation
The working condition of device is sent to the public measure and control device 300 with remote signals;
The public measure and control device 300 is also used to receive the remote signals, and is generated and indicated according to the remote signals
Signal is sent to the telecontrol device 200;
The telecontrol device 200 is also used to receive the indication signal, and by the network in telecontrol channel by the instruction
Signal is sent to the scheduling station 100.
Preferably, the control system of the Dual module modem apparatus 400 further includes secondary security device 500;
The secondary security device 500 is arranged between the scheduling station 100 and telecontrol device 200, described for receiving
The switching command that scheduling station 100 issues carries out safety inspection to the switching command, and will be by cutting described in safety inspection
It changes instruction and is sent to the telecontrol device 200.
A kind of control system of Dual module modem apparatus provided in an embodiment of the present invention, can supervise in scheduling station
When measuring plant stand modem failure, remote control starting switching module exits faulty modem, puts into spare modulation /demodulation
Device improves defect elimination operating efficiency, reduces to the remote repairing of telemechanical special line channel interrupt when completing modem failure
The scene rush to repair operation of teams and groups.
So far, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features;And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of Dual module modem apparatus, which is characterized in that including the first modem, second modem,
First power module, second power supply module and switching module;
The switching module includes power supply switching circuit, is remotely controlled to open and outputs contact into contact and remote signalling;
The input terminal of the power supply switching circuit is power input, and the output end of the power supply switching circuit includes normally closed contact
And normal opened contact;
One end of first power module is connect with the input terminal of first modem, and the other end normally closed connects with described
Point connection;
One end of the second power supply module is connect with the input terminal of the second modem, and the other end normally opened connects with described
Point connection;
The output end of first modem and the output end of the second modem simultaneously connect;
Contact is opened in the remote control and remote signalling outputs that contact outputs contact with the remote control on public measure and control device respectively and remote signalling is opened
Enter contact connection;
The power supply switching circuit is used to receive the switching signal from the public measure and control device, and according to the switching signal
First modem is switched to the state of exiting by investment state, and according to the switching signal by second modulatedemodulate
Device is adjusted to be switched to investment state by stand-by state;
The power supply switching circuit is also used to for the working condition of the second modem being sent to remote signals described
Public measure and control device.
2. Dual module modem apparatus according to claim 1, which is characterized in that the switching module is provided with back
Road involution button.
3. Dual module modem apparatus according to claim 2, which is characterized in that the power supply switch circuit includes
First relay circuit and the second relay circuit;
First relay circuit for receiving the switching signal, and according to switching signal control control described second after
Circuit is connect with the power input, so that the second modem is switched to investment state by stand-by state.
4. Dual module modem apparatus according to claim 3, which is characterized in that first relay circuit includes
First relay, first relay include the first common end, the first normal opened contact corresponding with first common end, the
Two common ends, the second normal opened contact corresponding with second common end;
First common end and the second common end are connect with the power input, the coil difference of first relay
It opens with the remote control and is connect into contact and first normal opened contact, another described second normal opened contact and second relay
Circuit connection;
When the remote control is opened into junction closure, the coil of first relay obtains electric, first common end and described the
One normal opened contact closure forms self-holding circuit, and second common end and second normal opened contact are closed.
5. Dual module modem apparatus according to claim 4, which is characterized in that second relay circuit includes
Second relay, third relay and the 4th relay;
The coil of second relay, third relay and the 4th relay is connect with second normal opened contact;
Second common end and second normal opened contact closure after, second relay, third relay it is public
End connect with the power input, the normally closed contact of second relay and third relay with first power supply
The input terminal of module connects, and the normal opened contact of second relay and third relay is defeated with the second power supply module
Enter end connection;
Second common end and second normal opened contact closure after, the common end of the 4th relay with it is described public
The remote signalling power supply common end of measure and control device connects, and the normal opened contact of the 4th relay is outputed contact with the remote signalling and connect,
And then it opens with the remote signalling on the public measure and control device and is connect into contact.
6. Dual module modem apparatus according to claim 5, which is characterized in that first modem
Analog channel, which is opened, to be opened into and connects into the analog channel with the second modem, and the modulation of first modem is defeated
It exports and connects with the modulation of the second modem out.
7. a kind of control system of Dual module modem apparatus, which is characterized in that including scheduling station, telecontrol device, public
Measure and control device and Dual module modem apparatus as described in any one of claims 1 to 6;
The scheduling station is connect by network in telecontrol channel with the telecontrol device, and telemechanical special line channel and the Dual module are passed through
Modem apparatus connection;The public measure and control device connects with the telecontrol device and Dual module modem apparatus respectively
It connects;
The scheduling station is used to send switching command to the telecontrol device by the network in telecontrol channel;
The telecontrol device exports the switching command to the public measure and control device for receiving the switching command;
The public measure and control device is used to generate switching signal according to the switching command, and the switching signal is exported to institute
State Dual module modem apparatus;
The Dual module modem apparatus is used to be completed according to the switching signal to first modem and the
The switching of the working condition of two modems;And for by the work of first modem and second modem
Make state and is sent to the public measure and control device with remote signals;
The public measure and control device is also used to receive the remote signals, and generates indication signal according to the remote signals and send
To the telecontrol device;
The telecontrol device is also used to receive the indication signal, and is sent the indication signal by the network in telecontrol channel
To the scheduling station.
8. the control system of Dual module modem apparatus according to claim 7, which is characterized in that further include secondary
Security device;
The secondary security device is arranged between the scheduling station and telecontrol device, for receiving the scheduling station sending
Switching command carries out safety inspection to the switching command, and described by being sent to by the switching command of safety inspection
Telecontrol device.
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CN110571935A (en) * | 2019-09-26 | 2019-12-13 | 国网湖南省电力有限公司 | Remote locking method for station spare power automatic switching device |
CN110749796A (en) * | 2019-11-22 | 2020-02-04 | 国网四川省电力公司检修公司 | Remote signaling test multiplexing device and operation method for electric power integrated automation system of transformer substation |
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CN207968500U (en) * | 2017-12-08 | 2018-10-12 | 深圳供电局有限公司 | 101 passageway remote self-loopa testing arrangement |
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CN110571935B (en) * | 2019-09-26 | 2021-11-30 | 国网湖南省电力有限公司 | Remote locking method for station spare power automatic switching device |
CN110749796A (en) * | 2019-11-22 | 2020-02-04 | 国网四川省电力公司检修公司 | Remote signaling test multiplexing device and operation method for electric power integrated automation system of transformer substation |
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