CN208923917U - A kind of medium-voltage distribution network control system - Google Patents
A kind of medium-voltage distribution network control system Download PDFInfo
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- CN208923917U CN208923917U CN201821968701.4U CN201821968701U CN208923917U CN 208923917 U CN208923917 U CN 208923917U CN 201821968701 U CN201821968701 U CN 201821968701U CN 208923917 U CN208923917 U CN 208923917U
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- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000011218 segmentation Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001037 White iron Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a kind of medium-voltage distribution network control systems, it include: control device, network communication equipment and operation equipment, wherein, control device includes signal acquisition port and signal control port, and signal acquisition port is connected with network communication equipment, and receives the operational order of network communication equipment transmission, signal control port is connected with operation equipment, and the operation content determined after the received operational order parsing in signal acquisition port is exported to operation equipment.Pass through signal acquisition port and the signal control port in control device in this programme, realize the acquisition to operational order in network communication equipment, and operation content can be exported to operation equipment automatically, the acquisition and output of information are realized by above-mentioned connection relationship, the problem of avoiding that manual operation bring power off time is longer, back brake speed is slower, reducing user experience.
Description
Technical field
The utility model relates to electrical network field more particularly to a kind of medium-voltage distribution network control systems.
Background technique
Chengde 220kV and above major network are run in the form of looped network, and 110kV and following power distribution network are with forms of radiation
Operation, medium voltage distribution network electrification Loop Closing Operation easily cause biggish electromagnetic looped network to need when Alloy White Iron is more than permissible value with elder generation
The principle sent after stopping carries out grid switching operation.
However, thering is 3-5 segmentation to open between feeder line of shaking hands currently, grid switching operation generallys use manual mode of operation's progress more
It closes, distance is different between each block switch, when load transfer operates, if single operation troop is operated, needs to arrive one by one
Up to execute-in-place, the travel time is longer, during which is turned to be in power failure for load, power off time is longer, reduces power failure
The user experience of the electricity consumption user in region.
Utility model content
In view of this, the present invention provides a kind of medium-voltage distribution network control systems, to solve press-fitting in the prior art
The problem of when power grid grid switching operation, needing manual operation, causing power off time longer, reduce user experience, concrete scheme
It is as follows:
A kind of medium-voltage distribution network control system, comprising:
Control device, the control device include: signal acquisition port and signal control port；
Network communication equipment, the signal acquisition port are connected with the network communication equipment, the signal acquisition port
The operational order sent for receiving the network communication equipment；
Equipment is operated, the signal control port is connected with the operation equipment, and the signal control port is used for institute
The operation content determined after the received operational order parsing in signal acquisition port is stated to export to the operation equipment.
Further, comprising:
When the operation equipment is no less than one, the signal control port is no less than one, the signal control
The quantity of port and the quantity of the operation equipment are identical or different.
Further, the operation equipment are as follows: switch or disconnecting link.
Further, the control device are as follows: automatic throw-in equipment of emergency power supply or feeder-terminal-unit.
Further, further includes:
Power load, the operation equipment are connected with the power load, and the operation equipment is for switching on or off institute
State the power supply of power load.
It can be seen from the above technical proposal that medium-voltage distribution network control system disclosed in the present application, comprising: control device,
Network communication equipment and operation equipment, wherein control device includes signal acquisition port and signal control port, signal acquisition terminal
Mouth is connected with network communication equipment, and receives the operational order of network communication equipment transmission, signal control port and operation equipment
It is connected, and the operation content determined after the received operational order parsing in signal acquisition port is exported to operation equipment.This programme
In by signal acquisition port in control device and signal control port, realize to operational order in network communication equipment
Acquisition, and capable of automatically exporting operation content to operation equipment realizes the acquisition of information and defeated by above-mentioned connection relationship
Out, the problem of avoiding that manual operation bring power off time is longer, back brake speed is slower, reducing user experience.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of medium-voltage distribution network control system disclosed in the utility model embodiment；
Fig. 2 is a kind of structural schematic diagram of Switching Station disclosed in the utility model embodiment；
Fig. 3 is a kind of structural schematic diagram of medium voltage distribution network control device disclosed in the utility model embodiment；
Fig. 4 is a kind of structural schematic diagram of more segmentation feeder line control systems disclosed by the embodiments of the present invention
Fig. 5 is a kind of structural schematic diagram of medium-voltage distribution network control system disclosed in the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model discloses a kind of medium-voltage distribution network control system, structural schematic diagram is as shown in Figure 1, comprising:
Control device 11, network communication equipment 12 and operation equipment 13.
Wherein, control device 11 includes: signal acquisition port 111 and signal control port 112.
Signal acquisition port 111 is connected with network communication equipment 12, and the operation for receiving the transmission of network communication equipment 12 refers to
It enables.
Signal control port 112 is connected with operation equipment 13, and the received operational order in signal acquisition port 111 is parsed
Determining operation content is exported to operation equipment 13 afterwards.
Wherein, control device can be automatic throw-in equipment of emergency power supply, or feeder-terminal-unit, control dress
Setting can also be by the way that existing automatic throw-in equipment of emergency power supply or feeder-terminal-unit is transformed, to meet corresponding function need
It asks, independent control device can also be developed, be not specifically limited herein.
In medium voltage distribution network, to realization grid switching operation, needs to carry out in a manner of first stopping sending afterwards, i.e., first have a power failure, etc.
When grid switching operation is completed, then power transmission, also, it is directed to the grid switching operation of medium voltage distribution network, it generallys use manual operation and is switched
Control, this results in power off time longer, reduces the electricity consumption experience of the electricity consumption user of power supply interrupted district.
In the present embodiment, when grid switching operation starts, starting automatic throw-in equipment of emergency power supply or feeder line are automatic first
Makeup is set, and by taking automatic throw-in equipment of emergency power supply device as an example, starts automatic throw-in equipment of emergency power supply, so that in grid switching operation process
In, it is powered by the electricity consumption user that backup power source is grid switching operation region in medium voltage distribution network, so that grid switching operation region
Power failure duration be mostly the second grade, avoid the longer problem of power off time during grid switching operation.
During grid switching operation, the operational order that network communication equipment 12 is sent is received by signal acquisition port 111,
Wherein, operational order is what dispatcher was sent by network communication equipment, specifically, operational order can be by manually working out or being
System memory.
Operational order is sent by network communication equipment, is realized by network transmission control instruction, without human intervention
When operational order is filled in by dispatcher and then reads the content of operational order one by one to site operation personnel by phone, then by
Operator operates field device in sequence, and the voice that avoiding may cause during telephonic voice transmission operational order passes
It inputs mistake by mistake, and reduces artificial participation, reduce human cost.
Control device 11 parses operational order, and to obtain the content indicated in operational order, i.e., sequence operates
Concrete operations content, equipment is controlled according to operation content, without site operation personnel be manually operated, execute-in-place people
Whether member only needs review operations content wrong, alternatively, being audited by host to the operation content.
Operation content includes at least: a no less than operation equipment to be controlled, and, it is set for no less than one operation
Standby operation order, operation order is different, may cause different operating results；
It can also include: to operate the time interval operated between equipment for each adjacent two in operation content, with
Avoid when for an equipment operated after next equipment is operated at once caused by interval time not enough ask
Topic or interval time too long problem.
When automatically controlling operation equipment completion grid switching operation by control device, either between every two equipment
The operation order between time interval or equipment operated, can be automatically controlled by host, be participated in without artificial,
Artificial counting, the problem of avoiding manual operation possible operation error.
Wherein, operation equipment may include: the electric power primary equipment such as switch or disconnecting link, or other equipment.
After successively controlling a no less than operation equipment according to operation order, grid switching operation is completed, is grasped in back brake
After the completion of work, backup power source can be closed, is powered using main power source, so that when carrying out grid switching operation again,
Can make backup power source again by automatic throw-in equipment of emergency power supply is load supplying.
Wherein, the opereating specification of sequential control can be in medium voltage distribution network are as follows: " operation, stand-by heat, the cold standby of controller switching equipment
With " mutual conversion between three kinds of states.
The operation object of sequential control may include: that line-breaker, bus breaker or segmentation are disconnected in medium voltage distribution network
Road device, disconnecting switch, busbar breaker operation power and feeder line section switch.
Equipment requirement to sequential control operation object may include: each breaker for realizing sequential control operation, isolation
Switch should have remotely controlling functional, and the acquisition of position signal is using double auxiliary contact remote signalling.
There is no transformer inside Switching Station, only switchs and into and out of line, schematic diagram is as shown in Figure 2.
The opereating specification of the sequential control of medium voltage distribution network may include: Switching Station bus turn for when respectively switch it is automatic
Sequence operates, the automatic sequential operation of each block switch when can also include: load transfer between Switching Station feeder line.
It may include: the opening and closing for realizing sequence operation for the operation object equipment requirement that sequential control in Switching Station operates
Station equipment should have perfect anti mis-closedown function；It can also include: to realize that the Switching Station protection equipment of sequence should have a distant place
Soft pressing plate and distant place switching definite value area function are moved back in throwing；It can also include: the Switching Station busbar breaker operation for realizing sequence operation
Power supply should have remotely controlling functional.
Wherein, sequential control includes: control on the spot and distant place control.
When protecting remote operation hard pressing plate to open into being 0, for mode on the spot, sequential control allows out on the spot for setting one
Enter, specifically, a button can be arranged on screen cabinet, then the pressing plate of connecting is realized, sequential control is selected on the spot for setting 3
It opens into respectively sequence selection is opened into 1 on the spot, sequence selection is opened and opened into 2 and on the spot sequence selection into 3 on the spot；
Wherein, the mode of sequential control is as shown in table 1 on the spot:
The mode of the sequential control on the spot of table 1
When using mode on the spot, in such a way that selection needs are opened in the selection of sequence on the spot, then permit by sequence on the spot
Permitted to open and be conjugated into button 0~1, device carries out division operation automatically, and necessary involution is primary after the completion of a local operation, later
It just can be carried out subsequent operation.
Be distant place mode when protecting distant place hard pressing plate to open into being 1, at this time 3 on the spot sequence selection open into invalid, far
Square mode setting sequence divides inlet wire 1 to close segmentation, point segmentation conjunction inlet wire 1, inlet wire 2 is divided to close segmentation, point segmentation conjunction inlet wire 2, divide inlet wire 1
It closes inlet wire 2 and inlet wire 2 is divided to close totally 6 remote controlled points of inlet wire 1, division operation is selected by host remote, it is main if meeting sequence condition
Machine remotely executes, and device, which just acts, completes division operation.Necessary involution is primary after the completion of a remote operation, Zhi Houcai
It can be carried out subsequent operation.
Wherein, the structural schematic diagram of medium voltage distribution network control device can be as shown in Figure 3, comprising: 1 switch 1DL of inlet wire, into
2 switch 2DL of line, block switch 3DL and automatic throw-in equipment of emergency power supply 41.
More segmentation feeder line sequential control modes also may include: control on the spot and distant place control.
Wherein, feeder line segment information may include: Awaiting Overhaul route two sides switching information, can also include: interconnection switch
Information, wherein interconnection switch information may be in the memory being directly stored in system, in order to carry out segmentation feeder line
When, directly obtained from memory.
Specifically, successively disconnecting the switch for overhauling sectionalized line two sides in feeder line, Zhi Houhe by feed line automatization terminal
Enter to get in touch with gateway, so as to the grid switching operation completed isolation maintenance section, restore non-maintenance section power supply.
When protecting remote operation hard pressing plate to open into being 0, for mode on the spot, sequence allows to open into tool on the spot for setting one
Body, a button can be set on screen cabinet, then the pressing plate of connecting is realized, sequence selection is opened into respectively on the spot for setting 3
It opens for the selection of sequence on the spot into 1, sequence selection is opened and opened into 2 and on the spot sequence selection into 3 on the spot.
Wherein, the mode of mostly segmentation feeder lines sequence on the spot is as shown in table 2:
The sequential control mode on the spot of the segmentation feeder line of table more than 2
When using mode on the spot, in such a way that selection needs are opened in the selection of sequence on the spot, then permit by sequence on the spot
Permitted to open and be conjugated into button 0~1, device carries out division operation automatically, and necessary involution is primary after the completion of a local operation, later
It just can be carried out subsequent operation.
Be distant place mode when protecting distant place hard pressing plate to open into being 1, at this time 3 on the spot sequence selection open into invalid, far
Square mode setting sequence sorting repairs a section two sides switch, closes interconnection switch, remote controlled point quantity is related to block switch quantity, passes through master
Division operation is carried out after machine Remote Selection, if meeting sequence condition, host remote is executed, and device, which just acts, completes division behaviour
Make, necessary involution is primary after the completion of a remote operation, just can be carried out subsequent operation later.
Specifically, mostly segmentation feeder line control structure is as shown in Figure 4, comprising: 1DL, 2DL, 3DL, 4DL, 5DL, 6DL, 7DL, A
Stand bus and B station bus.
Wherein, 1DL, 2DL, 3DL, 4DL, 5DL, 6DL and 7DL are to be set to opening between A station bus and the station B bus
It closes, power load is had between every two adjacent switch.
When operating normally, 1DL, 2DL and 3DL switch are in coincidence, and from A stand bus to 1DL route,
The route between route, 2DL to 3DL between 1DL to 2DL is stood bussed supply until 3DL to the route between 4DL by A,
5DL, 6DL and 7DL switch are in coincidence, and from B stand bus to the route 7DL, the route between 7DL to 6DL,
For 6DL to the route between 5DL until 5DL to the route between 4DL is by the station B bussed supply, 4DL switch is in quartile；
When there are two the line failure between switch or when needing to overhaul, disconnecting and failure or the line for needing to overhaul
The switch of road two sides controls 4DL switch in coincidence, so that removing fault wire if two switches disconnected do not include 4DL
All other routes outside road or the route that overhauls of needs are in normal power supply state, to guarantee the power load in non-faulting section
It operates normally.
Such as: the route between 2DL and 3DL breaks down or needs to overhaul, then 2DL and 3DL switch is disconnected, so that 2DL
Route between 3DL is in the state of power-off Awaiting Overhaul, at this point, 4DL is closed, so that from the station A bus to 1DL
Route between route, 1DL to 2DL is stood bussed supply by A, also, from 3DL to 4DL between route, between 4DL to 5DL
Route, the route between 5DL to 6DL, the route between 6DL to 7DL and the route between the bus of the station 7DL to B stood by B
Bussed supply, to guarantee that the All other routes in addition to the route between 2DL to 3DL are in normal operating condition.
Similarly, if the route between 5DL and 6DL breaks down or needs to overhaul, 5DL and 6DL switch is disconnected, and close
4DL switch, identical as a upper Example Principles, details are not described herein.
Further, operation equipment 13 can be 1, or multiple, signal control port 112 can be 1,
Can be to be multiple, the quantity of signal control port may be the same or different with the quantity for operating equipment.
Specifically, signal control port is 1 when operation equipment is 1, and when operation equipment is 2, signal control port
It can be 1, or 2, when operation equipment is multiple, signal control port can be 1, or set with operation
Standby identical quantity it is multiple, can also be and operation equipment different number it is multiple.
Further, the structural schematic diagram of medium-voltage distribution network control system disclosed in the present embodiment is as shown in figure 5, packet
It includes:
Control device 51, network communication equipment 52 operate equipment 53 and power load 54.
Wherein, control device 51 includes: signal acquisition port 511 and signal control port 512.
In addition to structure identical with a upper embodiment, the present embodiment also adds power load 54.
Power load 54 is connected with operation equipment 53, and operation equipment 53 is used to switch on or off the power supply of power load 54.
Medium-voltage distribution network control system disclosed in the present embodiment, comprising: control device, network communication equipment and operation are set
It is standby, wherein control device includes signal acquisition port and signal control port, signal acquisition port and network communication equipment phase
Even, and the operational order of network communication equipment transmission is received, signal control port is connected with equipment is operated, and by signal acquisition terminal
The operation content determined after the received operational order parsing of mouth is exported to operation equipment.Pass through the letter in control device in this programme
Number acquisition port and signal control port, realizes the acquisition to operational order in network communication equipment, and will can grasp automatically
It exports as content to operation equipment, the acquisition and output of information is realized by above-mentioned connection relationship, avoids manual operation band
The problem of power off time come is longer, back brake speed is slower, reduces user experience.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (5)
1. a kind of medium-voltage distribution network control system characterized by comprising
Control device, the control device include: signal acquisition port and signal control port；
Network communication equipment, the signal acquisition port are connected with the network communication equipment, and the signal acquisition port is used for
Receive the operational order that the network communication equipment is sent；
Equipment is operated, the signal control port is connected with the operation equipment, and the signal control port is used for the letter
The operation content determined after number acquisition port received operational order parsing is exported to the operation equipment.
2. system according to claim 1 characterized by comprising
When the operation equipment is no less than one, the signal control port is no less than one, the signal control port
Quantity and it is described operation equipment quantity it is identical or different.
3. system according to claim 1, which is characterized in that the operation equipment are as follows: switch or disconnecting link.
4. system according to claim 1, which is characterized in that the control device are as follows: automatic throw-in equipment of emergency power supply
Or feeder-terminal-unit.
5. system according to claim 1, which is characterized in that further include:
Power load, the operation equipment are connected with the power load, and the operation equipment is for switching on or off the use
The power supply of electric loading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968701.4U CN208923917U (en) | 2018-11-27 | 2018-11-27 | A kind of medium-voltage distribution network control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968701.4U CN208923917U (en) | 2018-11-27 | 2018-11-27 | A kind of medium-voltage distribution network control system |
Publications (1)
| Publication Number | Publication Date |
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| CN208923917U true CN208923917U (en) | 2019-05-31 |
Family
ID=66712505
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821968701.4U Active CN208923917U (en) | 2018-11-27 | 2018-11-27 | A kind of medium-voltage distribution network control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN208923917U (en) |
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2018
- 2018-11-27 CN CN201821968701.4U patent/CN208923917U/en active Active
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