CN116169659A - Device, method and equipment for connecting storage battery to direct current system - Google Patents
Device, method and equipment for connecting storage battery to direct current system Download PDFInfo
- Publication number
- CN116169659A CN116169659A CN202310117108.8A CN202310117108A CN116169659A CN 116169659 A CN116169659 A CN 116169659A CN 202310117108 A CN202310117108 A CN 202310117108A CN 116169659 A CN116169659 A CN 116169659A
- Authority
- CN
- China
- Prior art keywords
- voltage
- direct current
- current system
- pressure difference
- storage battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of intelligent control, in particular to a device, a method and equipment for connecting a storage battery to a direct current system. It can be understood that the technical scheme provided by the invention can ensure that the pressure difference is within a specified safety range when the standby storage battery is connected to the direct current system, and improve the safety when the standby storage battery is connected to the direct current system.
Description
Technical Field
The invention relates to the technical field of intelligent control, in particular to a device, a method and equipment for assembling a storage battery into a direct current system.
Background
The direct current system provides reliable direct current power supply for control, signal, relay protection, automatic device, accident lighting and the like in the transformer substation, and also provides reliable operation power supply for operation, so that the direct current system plays a vital role in the safety of the transformer substation, and is the guarantee of the safe operation of the transformer substation.
The existing 35kV and below transformer substation direct current systems are provided with only one set of direct current system according to configuration specifications, one set of direct current system is provided with only one set of storage batteries, when a worker needs to check and maintain the set of storage batteries, the worker needs to firstly connect a temporary standby storage battery into the direct current system, then disconnect the original storage battery, and check and maintain the original storage battery.
When the temporary standby storage battery is connected, the pressure difference between the direct current system connection side and the storage battery side cannot exceed 2% according to the connection requirement, and in the practical situation, the standby storage battery is always directly connected to the direct current system, if the pressure difference is too large, larger impact current is generated, even electric spark is generated, and the safety is insufficient.
Disclosure of Invention
In view of the above, the present invention is to provide a device, a method and a device for connecting a storage battery to a dc system, so as to solve the problem of insufficient safety when a backup storage battery is connected to the dc system in the prior art.
According to a first aspect of an embodiment of the present invention, there is provided an apparatus for assembling a battery into a dc system, including:
the device comprises an acquisition unit, a processing unit and an execution mechanism which are sequentially connected, and a communication unit connected with the processing unit;
the communication unit is used for being in communication connection with the direct current system integrated control module, and when the standby storage battery is connected to the executing mechanism, the communication unit receives an access instruction sent by the direct current system integrated control module and sends the access instruction to the processing unit;
the processing unit is used for controlling the acquisition unit to acquire a first voltage of the bus side of the direct current system and a second voltage of the output end of the standby storage battery pack when the access instruction is received; when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, the direct current system integrated control module is enabled to adjust the bus voltage of the direct current system; and when the pressure difference between the first voltage and the second voltage is smaller than a preset pressure difference, controlling the executing mechanism to connect the standby storage battery into the direct current system.
Preferably, the device further comprises:
and the alarm module is used for sending out alarm sound for prohibiting switching-on when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, and sending out prompt sound for permitting switching-on when the pressure difference between the first voltage and the second voltage is smaller than the preset pressure difference.
Preferably, the device further comprises:
and the executing mechanism control end is used for controlling the executing mechanism to access the standby storage battery into the direct current system when receiving the control instruction.
Preferably, the device further comprises:
and the locking module is used for locking the actuating mechanism when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, and prohibiting triggering of closing operation.
Preferably, the device further comprises:
and the short-circuit protection module is used for carrying out short-circuit protection on the circuit after the standby storage battery is connected into the direct-current system.
Preferably, the device is arranged inside a direct current charging screen of the direct current system.
According to a second aspect of the embodiment of the present invention, there is provided a method for accessing a battery pack into a dc system, which is applied to the apparatus of any one of the above embodiments, including:
when an access instruction is received, collecting a first voltage of a bus side of the direct current system and a second voltage of an output end of the standby storage battery pack;
comparing the first voltage with the second voltage;
when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, regulating the bus voltage of the direct current system;
and when the pressure difference between the first voltage and the second voltage is smaller than a preset pressure difference, the standby storage battery pack is connected into the direct current system.
Preferably, before the standby storage battery is connected to the dc system, the method further includes:
sending out a prompt tone of preset permission closing;
and when a closing instruction is received, the standby storage battery pack is connected to the direct current system.
Preferably, when the voltage difference between the first voltage and the second voltage is greater than or equal to a preset voltage difference, the method further includes:
and locking the actuating mechanism, and prohibiting triggering of closing operation.
According to a third aspect of an embodiment of the present invention, there is provided an apparatus for accessing a battery pack to a dc system, including:
a master controller and a memory connected with the master controller;
the memory, in which program instructions are stored;
the master is configured to execute program instructions stored in the memory and perform the method of any of the above.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
it can be understood that the invention provides a device, a method and equipment for assembling a storage battery into a direct current system, the device comprises a collecting unit, a processing unit, an actuating mechanism and a communication unit which is in communication connection with a direct current system integrated control module, when the storage battery is connected into the direct current system, the voltage conditions at two ends of the connected position can be collected and compared, when the pressure difference is larger than or equal to a preset pressure difference, the integrated control module of the direct current system is controlled to adjust the bus voltage of the direct current system, and when the pressure difference is smaller than the preset pressure difference, the storage battery is allowed to be connected into the direct current system. It can be understood that the technical scheme provided by the invention can ensure that the pressure difference is within a specified safety range when the standby storage battery is connected to the direct current system, and improve the safety when the standby storage battery is connected to the direct current system.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic block diagram illustrating an apparatus for a battery pack to access a DC system according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating an installation location of a device for a battery pack to access a DC system according to an exemplary embodiment;
FIG. 3 is a schematic diagram of a workflow shown according to an exemplary embodiment;
fig. 4 is a schematic diagram illustrating steps of a method for battery pack access to a dc system according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
Example 1
Fig. 1 is a schematic block diagram illustrating an apparatus for assembling a battery into a dc system according to an exemplary embodiment, and referring to fig. 1, an apparatus for assembling a battery into a dc system is provided, including:
the device comprises an acquisition unit 101, a processing unit 102, an execution mechanism 103 and a communication unit 104, wherein the acquisition unit 101, the processing unit 102 and the execution mechanism 103 are sequentially connected, and the communication unit 104 is connected with the processing unit 102;
the communication unit 104 is configured to be in communication connection with the dc system integrated control module 200, and when the standby battery pack 400 is connected to the executing mechanism 103, the communication unit 104 receives an access instruction sent by the dc system integrated control module 200 and sends the access instruction to the processing unit 102;
the processing unit 102 is configured to control the acquisition unit 101 to acquire a first voltage on the bus side of the dc system and a second voltage at the output end of the backup battery pack 400 when the access instruction is received; when the differential pressure between the first voltage and the second voltage is greater than or equal to a preset differential pressure, the direct current system integrated control module 200 is enabled to adjust the bus voltage of the direct current system; and when the voltage difference between the first voltage and the second voltage is smaller than a preset voltage difference, controlling the actuating mechanism 103 to connect the standby storage battery 400 to the direct current system.
Fig. 2 is a schematic diagram of an installation position of a device for connecting a battery pack to a dc system according to an exemplary embodiment, referring to fig. 2, the device for connecting a battery pack to a dc system provided in this embodiment may be an intelligent breaker 100, where the intelligent breaker 100 is connected to a bus of the dc system, when a worker needs to perform a battery pack inspection and maintenance work, a standby battery pack 400 is connected to a lower end of the intelligent breaker 100, and then the intelligent breaker 100 works, and after adjustment, the device is switched on, so that the standby battery pack 400 is successfully connected to the dc system, and the worker disconnects the original battery pack. In practical applications, the device is disposed inside the dc charging screen 300 of the dc system.
In specific practice, referring to fig. 3, when a worker needs to perform a battery pack inspection maintenance operation, firstly, the backup battery pack 400 is connected to the intelligent circuit breaker 100, at this time, the worker may send an access instruction to the intelligent circuit breaker 100 through the integrated control module of the dc system, when the intelligent circuit breaker 100 receives the access instruction, the bus voltage of the dc system and the voltage of the backup battery pack 400 are automatically detected, and a differential pressure is obtained, and when the differential pressure is smaller than a preset value, it is considered that a safety standard is reached at this time, a closing operation can be performed, preferably, the preset value may be 2%, that is, the differential pressure cannot exceed 2%.
It should be noted that the device further includes:
and the alarm module is used for sending out alarm sound for prohibiting switching-on when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, and sending out prompt sound for permitting switching-on when the pressure difference between the first voltage and the second voltage is smaller than the preset pressure difference.
In specific practice, according to the technical scheme provided by the embodiment, the device can alarm the result of the pressure difference, so that a worker can know the current adjustment state in real time.
It should be noted that the device further includes:
and the control end of the executing mechanism 103 is used for controlling the executing mechanism 103 to connect the standby storage battery 400 into the direct current system when receiving a control instruction.
In specific practice, the device further comprises an actuator 103 control end, and a worker can manually control access through the actuator 103 control end.
It should be noted that the device further includes:
and the locking module is used for locking the executing mechanism 103 when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, and prohibiting triggering of closing operation.
In specific practice, the locking module may prevent that the actuator 103 may be directly locked when the differential pressure is greater than or equal to a preset differential pressure, so as to prohibit triggering of the closing operation. It will be appreciated that by providing a latching module, the safety of the device can be increased even further.
It should be noted that the device further includes:
and the short-circuit protection module is used for carrying out short-circuit protection on a circuit after the standby storage battery 400 is connected into the direct-current system.
It can be understood that by arranging the short-circuit protection module, if a short circuit occurs in the access process, the short-circuit protection can be immediately triggered, so as to avoid further expansion of the accident.
According to the technical scheme shown in the embodiment, the intelligent circuit breaker 100 is installed in a charging screen of a direct current system, the upper end of the intelligent circuit breaker is directly connected to a bus of the direct current system, the lower end of the intelligent circuit breaker is suspended in the air when the intelligent circuit breaker is in normal operation, and when maintenance on a storage battery pack is required to be carried out and the intelligent circuit breaker is separated from the direct current system, the lower end of the intelligent circuit breaker is connected to a standby storage battery pack 400.
The dc intelligent breaker 100 includes: after the standby storage battery is connected to the lower end, the voltage conditions of the two sides are synchronously detected, when the voltage of the two sides is greater than the pressure difference of 2% of the regulation, an alarm sound is sent out, meanwhile, the locking mechanism is used for tightly preventing closing, and the voltage is fed back to the comprehensive processing unit 102 to adjust the busbar voltage of the direct current system until the closing condition is met; after the standby storage battery 400 is connected, the storage battery is separated from the bus alarming function; after the backup battery 400 is connected, the short-circuit protection function is provided.
Through this intelligent circuit breaker 100, can be convenient for reserve storage battery 400 access direct current system, make things convenient for single direct current system factory station battery's maintenance and isolation.
Example two
Fig. 4 is a schematic diagram of steps of a method for accessing a battery pack to a dc system according to an exemplary embodiment, and referring to fig. 4, a method for accessing a battery pack to a dc system is provided, and the method is applied to an apparatus as described in any one of the above, and includes:
step S11, when an access instruction is received, collecting a first voltage of a bus side of a direct current system and a second voltage of an output end of a standby storage battery pack;
step S12, comparing the first voltage with the second voltage;
step S13, when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, the bus voltage of the direct current system is adjusted;
and step S14, when the pressure difference between the first voltage and the second voltage is smaller than a preset pressure difference, the standby storage battery pack is connected into the direct current system.
In particular practice, the method can be applied directly to a direct current system, or to a particular device which is connected to the bus of the direct current system when a standby battery is required.
When a worker checks and maintains the storage battery pack of the direct current system, firstly, the standby storage battery pack is connected to a corresponding interface, at the moment, the standby storage battery pack is not connected with the bus of the direct current system, then an access instruction is sent to a device applying the method, the device can compare the pressure difference between the bus of the direct current system and the standby storage battery pack, the voltage of the bus of the direct current system is adjusted, then the pressure difference is indirectly adjusted, and when the pressure difference is smaller than a preset pressure difference, the standby storage battery pack is accessed into the direct current system.
It can be understood that, in the method for accessing the storage battery into the direct current system provided by the embodiment, when an access instruction is received, a first voltage on a bus side of the direct current system and a second voltage at an output end of the standby storage battery are collected; comparing the first voltage with the second voltage; when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, regulating the bus voltage of the direct current system; and when the pressure difference between the first voltage and the second voltage is smaller than a preset pressure difference, the standby storage battery pack is connected into the direct current system. It can be understood that, the technical scheme that this embodiment shows can ensure that pressure differential is within prescribed safety range when reserve battery inserts direct current system, improves the security when reserve battery inserts direct current system.
Before the standby storage battery is connected to the dc system, the method further includes:
sending out a prompt tone of preset permission closing;
and when a closing instruction is received, the standby storage battery pack is connected to the direct current system.
In specific practice, in order to facilitate the staff to know the pressure difference change condition of the storage battery pack and the direct current system at any time, a prompt tone can be set. Preferably, the warning lamps may be simultaneously or individually provided, and when the pressure difference is greater than a preset pressure difference, the warning lamps are lighted red, and when the pressure difference is less than the preset pressure difference, the warning lamps are lighted green, which may be specifically set according to specific conditions.
It should be noted that, when the voltage difference between the first voltage and the second voltage is greater than or equal to a preset voltage difference, the method further includes:
and locking the actuating mechanism, and prohibiting triggering of closing operation.
In specific practice, when the differential pressure between the first voltage and the second voltage is greater than or equal to a preset differential pressure, the actuating mechanism can be locked by setting a locking structure, so that the triggering of the closing operation is forbidden, and the safety of the standby storage battery is further improved.
Example III
There is provided an apparatus for accessing a battery pack to a direct current system, comprising:
a master controller and a memory connected with the master controller;
the memory, in which program instructions are stored;
the master is configured to execute program instructions stored in the memory and perform the method of any of the above.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. An apparatus for assembling a battery into a dc system, comprising:
the device comprises an acquisition unit, a processing unit and an execution mechanism which are sequentially connected, and a communication unit connected with the processing unit;
the communication unit is used for being in communication connection with the direct current system integrated control module, and when the standby storage battery is connected to the executing mechanism, the communication unit receives an access instruction sent by the direct current system integrated control module and sends the access instruction to the processing unit;
the processing unit is used for controlling the acquisition unit to acquire a first voltage of the bus side of the direct current system and a second voltage of the output end of the standby storage battery pack when the access instruction is received; when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, the direct current system integrated control module is enabled to adjust the bus voltage of the direct current system; and when the pressure difference between the first voltage and the second voltage is smaller than a preset pressure difference, controlling the executing mechanism to connect the standby storage battery into the direct current system.
2. The apparatus as recited in claim 1, further comprising:
and the alarm module is used for sending out alarm sound for prohibiting switching-on when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, and sending out prompt sound for permitting switching-on when the pressure difference between the first voltage and the second voltage is smaller than the preset pressure difference.
3. The apparatus as recited in claim 2, further comprising:
and the executing mechanism control end is used for controlling the executing mechanism to access the standby storage battery into the direct current system when receiving the control instruction.
4. A device according to claim 3, further comprising:
and the locking module is used for locking the actuating mechanism when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, and prohibiting triggering of closing operation.
5. The apparatus as recited in claim 1, further comprising:
and the short-circuit protection module is used for carrying out short-circuit protection on the circuit after the standby storage battery is connected into the direct-current system.
6. The apparatus of claim 1, wherein the device comprises a plurality of sensors,
the device is arranged inside a direct current charging screen of the direct current system.
7. A method for assembling a storage battery into a direct current system, applied to the device as claimed in any one of claims 1 to 6, comprising:
when an access instruction is received, collecting a first voltage of a bus side of the direct current system and a second voltage of an output end of the standby storage battery pack;
comparing the first voltage with the second voltage;
when the pressure difference between the first voltage and the second voltage is larger than or equal to a preset pressure difference, regulating the bus voltage of the direct current system;
and when the pressure difference between the first voltage and the second voltage is smaller than a preset pressure difference, the standby storage battery pack is connected into the direct current system.
8. The method of claim 7, wherein prior to said accessing the backup battery pack to the dc system, further comprising:
sending out a prompt tone of preset permission closing;
and when a closing instruction is received, the standby storage battery pack is connected to the direct current system.
9. The method of claim 8, wherein when the differential pressure between the first voltage and the second voltage is greater than or equal to a preset differential pressure, further comprising:
and locking the actuating mechanism, and prohibiting triggering of closing operation.
10. An apparatus for assembling a battery into a dc system, comprising:
a master controller and a memory connected with the master controller;
the memory, in which program instructions are stored;
the master is configured to execute program instructions stored in a memory and to perform the method of any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117108.8A CN116169659A (en) | 2023-02-14 | 2023-02-14 | Device, method and equipment for connecting storage battery to direct current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117108.8A CN116169659A (en) | 2023-02-14 | 2023-02-14 | Device, method and equipment for connecting storage battery to direct current system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116169659A true CN116169659A (en) | 2023-05-26 |
Family
ID=86416001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310117108.8A Pending CN116169659A (en) | 2023-02-14 | 2023-02-14 | Device, method and equipment for connecting storage battery to direct current system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116169659A (en) |
-
2023
- 2023-02-14 CN CN202310117108.8A patent/CN116169659A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109455106B (en) | Intelligent charging station for electric automobile | |
| CN102055235B (en) | Spare power automatic switching method for 220kV side circuit and bus of 220kV transformer station | |
| CN112751408A (en) | Power supply circuit and power supply method | |
| CN116169659A (en) | Device, method and equipment for connecting storage battery to direct current system | |
| US20070297109A9 (en) | System and method for protecting against short circuits in electric power distribution architectures with two voltage levels | |
| CN103551006A (en) | Electric-bag dust collector, electric field manhole door safety device for same and safety detection method | |
| CN106340954A (en) | Method for identifying line breaking of power supply line and switching to standby power supply | |
| CN208874351U (en) | A kind of nuclear safe level uninterruptible power system and its bypass voltage monitor warning circuit | |
| CN113437795B (en) | Mobile box transformer substation vehicle with input voltage automatic switching function | |
| CN113422363B (en) | Intelligent parallel direct-current power supply management system | |
| JP3169976B2 (en) | Distribution line ground fault protection system | |
| CN105488880A (en) | Security door locking-prevention method | |
| CN215934815U (en) | Photovoltaic system and local manager | |
| CN215222138U (en) | Photovoltaic system | |
| CN215222137U (en) | Photovoltaic system | |
| JPH03265413A (en) | Distribution line protective device | |
| JPH0655013B2 (en) | Distribution system automation equipment | |
| JP3212342B2 (en) | Reverse charging prevention device | |
| KR20160022852A (en) | Hybrid power control appararus | |
| CN113120792A (en) | Protection device for accidental movement of elevator car and control method | |
| JP2814793B2 (en) | Remote monitoring and control system for distribution line protection equipment | |
| JPH0223067Y2 (en) | ||
| CN115473491A (en) | Photovoltaic system, local manager and self-checking method of photovoltaic system | |
| CN117317966A (en) | Intelligent power consumption management system and management control method for station power supply | |
| CN113131577A (en) | Train charging control method and train charging control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |