CN114094594A - Transformer substation direct current load grading control method and device and terminal equipment - Google Patents
Transformer substation direct current load grading control method and device and terminal equipment Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The invention is suitable for the technical field of power transmission and transformation design, and provides a method and a device for controlling a direct current load of a transformer substation in a grading manner and terminal equipment, wherein the method comprises the following steps: acquiring load details of a target transformer substation, and classifying the direct current load of the target transformer substation into a first-stage load, a second-stage load and a third-stage load according to a prestored direct current load classification rule; acquiring the capacity of a storage battery of a target transformer substation, and determining first time and second time based on the capacity of the storage battery and the graded direct current load; if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, stopping supplying power to the third-level load; and if the power supply of the target substation is not recovered within the second time after the alternating current is lost, stopping supplying power to the second-stage load. The grading control method for the direct current loads of the transformer substation can adjust the power supply of each direct current load in time after the alternating current of the transformer substation is lost, so that the power supply time of important loads is prolonged, and the capacity of a storage battery is reduced.
Description
Technical Field
The invention belongs to the technical field of power transmission and transformation design, and particularly relates to a method and a device for controlling a direct current load of a transformer substation in a grading manner and terminal equipment.
Background
Important equipment in a substation, such as communication equipment, usually uses a centralized valve-regulated sealed lead-acid battery as a backup power source. Specifically, the battery supplies power to the communication device through DC/DC conversion. In the transformer substation in the unattended mode, if all alternating current accidents occur and power is cut off, after the power failure accidents occur for a period of time, the 220V direct current system can be manually or automatically cut off, and the storage battery continuously supplies power for the 48V communication system.
With the diversified development of the transformer substation, the transformer substation gradually integrates the functions of a data center station and a 5G base station, direct current equipment in the station is widely applied due to higher reliability, direct current load is increased year by year, and the capacity configuration of a storage battery serving as a standby power supply is also increased year by year. Under normal conditions, a direct current load is supplied by an alternating current power grid through a charger, and a storage battery is used for supplying power only under the condition that alternating current is completely lost, so that the probability of occurrence of the condition is low, and the waste can be caused in practice for greatly increasing the capacity of the storage battery due to the fault.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and an apparatus for controlling a dc load of a substation in a hierarchical manner, and a terminal device, which can guarantee power supply of a load on the premise of reducing the capacity of a backup battery.
The first aspect of the embodiment of the invention provides a substation direct current load grading control method, which comprises the following steps:
acquiring load details of a target transformer substation, and grading the direct current load of the target transformer substation according to a prestored direct current load grading rule, wherein the graded direct current load comprises a first-stage load, a second-stage load and a third-stage load;
the method comprises the steps of obtaining the capacity of a storage battery of a target substation, and determining first time and second time based on the capacity of the storage battery and a graded direct current load, wherein the second time is greater than the first time;
if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, stopping supplying power to the third-level load;
and if the power supply of the target substation is not recovered within the second time after the alternating current is lost, stopping supplying power to the second-stage load.
A second aspect of the embodiments of the present invention provides a substation dc load hierarchical control apparatus, including:
the grading module is used for obtaining the load details of the target transformer substation and grading the direct current load of the target transformer substation according to a prestored direct current load grading rule, wherein the graded direct current load comprises a first-stage load, a second-stage load and a third-stage load;
the time determination module is used for acquiring the capacity of a storage battery of a target substation, and determining first time and second time based on the capacity of the storage battery and the graded direct current load, wherein the second time is greater than the first time;
the first power supply stopping module is used for stopping supplying power to the third-level load if the target substation does not recover power supply within the first time after the alternating current is lost;
a second power supply stopping module for stopping power supply for the second-stage load if the power supply of the target substation is not recovered within a second time after the alternating current is lost
A third aspect of the embodiments of the present invention provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the method are implemented.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as described above.
A fifth aspect of embodiments of the present invention provides a computer program product, which, when run on a terminal device, causes the electronic device to perform the steps of the method according to any one of the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the embodiment of the invention provides a substation direct current load grading control method which comprises the steps of obtaining load details of a target substation, grading the direct current load of the target substation according to a prestored direct current load grading rule, and dividing the direct current load into a first-stage load, a second-stage load and a third-stage load; acquiring the capacity of a storage battery of a target transformer substation, and determining first time and second time based on the capacity of the storage battery and the graded direct current load; if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, stopping supplying power to the third-level load; and if the power supply of the target substation is not recovered within the second time after the alternating current is lost, stopping supplying power to the second-stage load. The method for controlling the grading of the direct current loads of the transformer substation provided by the embodiment of the invention can adjust the power supply of each direct current load in time after the alternating current of the transformer substation is lost, so as to prolong the power supply time of important loads and reduce the capacity of a storage battery.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of an implementation of a method for controlling a dc load of a substation in a grading manner according to an embodiment of the present invention;
fig. 2 is a schematic view of an application scenario of the substation dc load hierarchical control method according to the embodiment of the present invention;
fig. 3 is a schematic diagram of another application scenario of the substation dc load classification control method according to the embodiment of the present invention;
fig. 4 is a schematic view of another application scenario of the substation dc load grading control method according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dc grading control apparatus of a substation according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 shows a schematic implementation flow diagram of a substation dc load hierarchical control method provided by an embodiment of the present invention. Referring to fig. 1, the substation dc load classification control method provided in the embodiment of the present invention may include steps S101 to S104.
S101: the method comprises the steps of obtaining load details of a target transformer substation, and grading the direct current loads of the target transformer substation according to prestored direct current load grading rules, wherein the graded direct current loads comprise first-stage loads, second-stage loads and third-stage loads.
In some embodiments, the first level loads include communications loads, station level equipment loads, utility equipment loads, UPS (Uninterruptible Power System) loads, primary network secondary bay level, and corresponding process level and bus differential protection equipment.
In some embodiments, the first-stage load is a direct-current load which must guarantee power supply, and is a load for guaranteeing the safety of a power grid and personnel
Specifically, the first-level load may include all communication loads, and is used to preferentially ensure that the communication loads in the system and the station are powered on, and ensure that a communication channel is smooth. The secondary load of the station control layer equipment is the guarantee of the power restoration of any equipment in the station, and comprises scheduling data network equipment, a host, a comprehensive application server, an I/II/III/IV area data communication network shutdown machine, safety protection equipment and a station control layer network switch. The public equipment load is used for metering, time synchronization, fault recording and network analysis, and is the guarantee for normal operation of other secondary equipment in the station, and comprises an electric energy meter, an electric energy acquisition device, a fault recording device, a network analysis device, a time synchronization host, an expansion log and station public measurement and control. UPS load relates to the safety equipment in the station, including auxiliary control equipment, fire alarm equipment and main transformer fire control equipment. The part of important secondary equipment loads for ensuring the main network to quickly recover power supply comprise a safety automatic device, a main network secondary spacer layer, corresponding process layer equipment and corresponding bus differential protection equipment. An emergency lighting load for ensuring lighting during an accident and thus personnel safety.
In some embodiments, the second-stage load includes a medium-low voltage bus protection device, a segment protection measurement and control device, a main transformer protection measurement and control device, a process layer device, and a station transformer-to-ground transformer protection measurement and control device.
In some embodiments, the second-stage load is a dc load that preferentially ensures quick power restoration of important equipment, for example, for a substation with a low-voltage side of a main substation or a grounding substation, power supply should be preferentially restored, and corresponding secondary equipment of the main substation should preferentially ensure power supply in an accident situation.
Specifically, the second-stage load may include a medium-low voltage bus protection and section protection measurement and control device, and is used to ensure bus safety and ensure power supply of bus protection before the load on the bus recovers power supply. And part of main transformer protection measurement and control and process layer equipment and a main transformer electric energy meter are used for ensuring the power supply of secondary equipment before the main transformer recovers the power supply. The protection measurement and control of 1 main transformer can be used as a second-level load, and the protection measurement and control of the main transformer without the station variable load can be used as a third-level load. The station 1 is measured and controlled by a variable grounding transformer for ensuring that low-voltage alternating current in the station can be quickly recovered to supply power, and the power supply of a storage battery can be removed after the low-voltage alternating current in the station is recovered. Important middle and low voltage load/line secondary equipment related to a weak link of a power grid is used for setting the important load and the line related to the weak link of the power grid as a second-level load so as to ensure the power supply of the corresponding secondary equipment and quickly recover the power supply after accident treatment.
In some embodiments, the third level load comprises a medium and low voltage general outlet protection measurement and control, a secondary load of a non-secondary main transformer, and a secondary load of a main transformer without a substation transformer.
In some embodiments, the third-level load is a secondary primary load, which is difficult to recover from power supply in a short time, and power failure of the corresponding secondary equipment load should be considered until the ac power supply for the station is recovered.
Specifically, the third-level load comprises medium and low voltage general outlet protection measurement and control, and secondary equipment of the general load or the convertible load can be finally considered to recover power supply. Partial main transformer protection measurement and control and process layer equipment and a main transformer electric energy meter can not supply power for the secondary load of the non-secondary main transformer and the secondary load of the main transformer without the substation transformer.
S102: acquiring the capacity of a storage battery of a target transformer substation, and determining first time and second time based on the capacity of the storage battery and the classified direct current load, wherein the second time is greater than the first time;
fig. 2 shows a schematic structural diagram of a substation dc load system applied to the substation dc load classification control method provided in the embodiment of the present invention. Referring to fig. 2, the dc loads of the substation are divided into a first-stage load, a second-stage load and a third-stage load, and after the ac power of the substation is lost, the dc loads of all stages are supplied with power by the storage battery. The shunt release is additionally arranged between each second-stage load and the storage battery to realize on-off control, each third-stage load is connected with the storage battery through the direct current shunt screen and the direct current feed screen, and the electric operating mechanism capable of being remotely controlled is additionally arranged between the direct current shunt screen and the direct current feed screen to realize on-off control.
S103: and if the power supply of the target substation is not recovered within the first time after the alternating current is lost, stopping supplying power to the third-level load.
In some embodiments, S103 comprises:
and if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, disconnecting the third-stage load split-screen power supply from the air switch to stop supplying power to the third-stage load.
Specifically, under the condition that the total station alternating current loses power, whether the fault can be remotely and automatically eliminated is judged, and if the alternating current fails and the storage battery supplies power for the first time, the alternating current transmission is not realized, the third-stage alternating current load is cut off.
Fig. 3 shows a controller structure diagram of a third-level load applied to the substation dc load hierarchical control method according to the embodiment of the present invention. Referring to fig. 3, the electric operating mechanism additionally arranged between the dc power distribution panel and the dc power supply panel of the third stage load has a manual switching mode and an automatic switching mode, wherein the manual switching mode can be used for switching between the on-state and the off-state through the handle. In the automatic switching mode, the electric operating mechanism switches between on and off according to a command input from the input terminal of the control power supply. Specifically, the electric operating mechanism is further provided with a switching-on/off indicating module, a power state indicating lamp and a safety padlock.
Because the quantity of third level load is more, use the mode that divides screen power supply to realize empty opening and shutting control through remote control electric operating mechanism. The air switch for supplying medium and low voltage concentrated loads on the direct current feeder screen can realize the concentrated control of medium voltage outlet secondary direct current loads, and can automatically control the third level load to recover power supply after the alternating current power supply is recovered.
In one specific application scenario, the first time is 2 hours.
S104: and if the power supply of the target substation is not recovered within the second time after the alternating current is lost, stopping supplying power to the second-stage load.
In some embodiments, S104 comprises:
and if the power supply of the target substation is not recovered within the second time after the alternating current is lost, disconnecting the direct current feeder screen shunt release of the second-stage load to stop supplying power to the second-stage load.
In a specific application scenario, the second time is 4 hours.
In still other embodiments, S104 includes cutting off the second dc load if the ac power transmission requirement is not satisfied after the third time after cutting off the third stage ac load.
In yet another specific application scenario, the third time is 2 hours.
Fig. 4 shows a controller structure diagram of a second-stage load applied to the substation dc load hierarchical control method according to the embodiment of the present invention. Referring to fig. 4, the control module node controls the shunt release of the second stage load through the intermediate relay. The control module is powered by the control module power supply.
The number of the second-stage load is less than that of the third-stage load, the importance is higher, the direct-current feeder screen is adopted for supplying power, and the shunt release is used for cutting off, so that the air separation control can be realized, the cost can be reduced, and the implementation convenience can be improved. In some application scenarios, the shunt release of the second-stage load can be manually controlled.
In some embodiments, the substation dc load grading control method may further include: and after the AC power supply is recovered, the power supply is recovered for the first-stage load, the second-stage load and the third-stage load, and the storage battery is charged.
The transformer substation direct current load grading control method of the embodiment of the invention can effectively realize the control of the second-stage and third-stage loads, reduce the capacity configuration of the direct current storage battery and increase the power supply time of important direct current loads under the condition of complete power loss of alternating current.
Optionally, the transformer substation direct current load hierarchical control method provided by the embodiment of the invention can be applied to a comprehensive automatic transformer substation, and only does not relate to related process layer equipment.
Optionally, the substation direct-current load hierarchical control method provided by the embodiment of the invention can be applied to newly-built intelligent substations or reconstruction and extension of existing substations. The investment for realizing the grading control of the direct current load by depending on the transformer substation equipment is less, and the cost is lower.
The transformer substation direct current load grading control method provided by the embodiment of the invention can reduce the capacity configuration of the direct current storage battery, and effectively ensure the power supply of important direct current loads under the condition of complete alternating current loss. Furthermore, the transformer substation direct current load grading control method provided by the embodiment of the invention cannot fail along with the difference of the specific transformer substation direct current load grading, a centralized control method can be adopted for a third-stage load with a large quantity, and a part of secondary direct current loads with a small quantity or far away from a direct current distribution screen can be controlled according to a second-stage load control method.
In one particular example, table 1 lists second and third stage dc load statistics for a target substation.
TABLE 1 statistical table of second-level load and third-level load of target substation
In the above specific example, the third-stage loads are the secondary dc loads of the medium-voltage outlet line 10 loop, the low-voltage outlet line 24 loop, the 2 main transformers and the 12 capacitors. The second-stage load is a secondary direct current load of a medium-voltage outgoing line 2 loop, 1 main transformer, 1 grounding transformer, and a medium-low voltage bus protection and subsection protection measurement and control device.
For the target substation in the above specific example, when the substation dc load hierarchical control method provided by the embodiment of the present invention is not used, the dc load statistics is not 365Ah, and a storage battery of 400Ah needs to be selected. After the method for controlling the grading of the direct-current load of the transformer substation provided by the embodiment of the invention is used, the storage battery with 300Ah can be used, or the power supply time of the storage battery with 400Ah is increased by 0.45 hour, so that the power supply time of important loads can be prolonged, and the capacity of the storage battery can be reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 5 shows a schematic structural diagram of a substation dc load classification control device according to an embodiment of the present invention. Referring to fig. 5, the substation dc load classification control device 50 provided in the embodiment of the present invention may include a classification module 510, a time determination module 520, a first power supply stopping module 530, and a second power supply stopping module 540.
And the grading module 510 is configured to obtain load details of the target substation, and grade the dc loads of the target substation according to a prestored dc load grading rule, where the graded dc loads include a first-level load, a second-level load, and a third-level load.
And a time determining module 520, configured to obtain a capacity of a storage battery of the target substation, and determine a first time and a second time based on the capacity of the storage battery and the classified dc load, where the second time is greater than the first time.
The first power supply stopping module 530 is configured to stop supplying power to the third-stage load if the target substation does not recover power supply within the first time after the ac power loss.
And a second power supply stopping module 540, configured to stop supplying power to the second-stage load if the target substation does not recover power supply within a second time after the ac power loss.
The substation direct current load grading control device provided by the embodiment of the invention can adjust the power supply of each direct current load in time after the alternating current of the substation is lost, so as to prolong the power supply time of important loads and reduce the capacity of a storage battery.
In some embodiments, the first power supply stopping module 530 is specifically configured to: and if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, disconnecting the third-stage load split screen power supply for idle opening to stop supplying power to the third-stage load.
In some embodiments, the second power supply stopping module 540 is specifically configured to: and if the power supply of the target substation is not recovered within the second time after the alternating current is lost, disconnecting the direct current feeder screen shunt release of the second-stage load to stop supplying power to the second-stage load.
In some embodiments, the first level of loads include communications loads, station level equipment loads, utility equipment loads, UPS loads, primary network secondary bay level and corresponding process level and bus differential protection equipment.
In some embodiments, the second-stage load includes a medium-low voltage bus protection device, a segment protection measurement and control device, a main transformer protection measurement and control device, a process layer device, and a station transformer-to-ground transformer protection measurement and control device.
In some embodiments, the third-level load comprises a medium-low voltage general outlet protection measurement and control, a secondary load of a non-secondary main transformer, and a secondary load of a main transformer without a substation transformer.
In some embodiments, the substation dc load stage control device further includes a power supply restoration module, configured to restore power to the first stage load, the second stage load, and the third stage load after ac power supply is restored, and charge the storage battery.
Fig. 6 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 6, the terminal device 60 of this embodiment includes: a processor 600, a memory 610, and a computer program 620, such as a substation dc load classification control program, stored in the memory 610 and executable on the processor 600. The processor 60, when executing the computer program 620, implements the steps in the above-described embodiments of the substation dc load grading control method, such as the steps S101 to S104 shown in fig. 1. Alternatively, the processor 600 executes the computer program 620 to realize the functions of the modules/units in the device embodiments, such as the modules 510 to 540 shown in fig. 5.
Illustratively, the computer program 620 may be partitioned into one or more modules/units, which are stored in the memory 610 and executed by the processor 600 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 620 in the terminal device 60. For example, the computer program 620 may be divided into a grading module, a time determination module, a first power supply stopping module, a second power supply stopping module.
The terminal device 60 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 600, a memory 610. Those skilled in the art will appreciate that fig. 6 is merely an example of a terminal device 60 and does not constitute a limitation of terminal device 60 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 600 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 610 may be an internal storage unit of the terminal device 60, such as a hard disk or a memory of the terminal device 60. The memory 610 may also be an external storage device of the terminal device 60, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the terminal device 60. Further, the memory 610 may also include both an internal storage unit and an external storage device of the terminal device 60. The memory 610 is used for storing the computer programs and other programs and data required by the terminal device. The memory 610 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A transformer substation direct current load grading control method is characterized by comprising the following steps:
acquiring load details of a target transformer substation, and grading the direct current load of the target transformer substation according to a prestored direct current load grading rule, wherein the graded direct current load comprises a first-stage load, a second-stage load and a third-stage load;
acquiring the capacity of a storage battery of a target substation, and determining first time and second time based on the capacity of the storage battery and the graded direct current load, wherein the second time is greater than the first time;
if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, stopping supplying power to the third-level load;
and if the power supply of the target transformer substation is not recovered within the second time after the alternating current is lost, stopping supplying power to the second-stage load.
2. The substation direct current load grading control method according to claim 1, wherein if the target substation does not recover power supply within a first time after the alternating current fails, stopping supplying power to the third stage load, includes:
and if the power supply of the target transformer substation is not recovered within the first time after the alternating current is lost, disconnecting the third-stage load split-screen power supply from the air switch to stop supplying power to the third-stage load.
3. The substation direct current load grading control method according to claim 1, wherein if the target substation does not recover power supply within a second time after the alternating current loss, stopping supplying power to the second stage load comprises:
and if the power supply of the target transformer substation is not recovered within the second time after the alternating current is lost, disconnecting the direct-current feeder screen shunt release of the second-stage load to stop supplying power to the second-stage load.
4. The substation DC load grading control method according to any of claims 1 to 3, characterized in that the first level loads comprise communication loads, station level equipment loads, utility equipment loads, UPS loads, primary network secondary bay level and corresponding process level and bus differential protection equipment.
5. The substation direct current load hierarchical control method according to any one of claims 1 to 3, wherein the second-level load includes a medium-low voltage bus protection device, a segment protection measurement and control device, a main transformer protection measurement and control and process layer equipment, and a station grounding transformer protection measurement and control.
6. The substation direct current load hierarchical control method according to any one of claims 1 to 3, wherein the third level load includes medium and low voltage general outlet protection measurement and control, secondary load of a non-secondary main transformer, and secondary load of a main transformer without substation.
7. The substation direct current load grading control method according to any one of claims 1 to 3, characterized in that the method further comprises:
and after the AC power supply is recovered, recovering the power supply for the first-stage load, the second-stage load and the third-stage load, and charging the storage battery.
8. The utility model provides a transformer substation's direct current load hierarchical control device which characterized in that includes:
the grading module is used for obtaining the load details of the target transformer substation and grading the direct current load of the target transformer substation according to a prestored direct current load grading rule, wherein the graded direct current load comprises a first-stage load, a second-stage load and a third-stage load;
the time determination module is used for acquiring the capacity of a storage battery of a target substation, and determining first time and second time based on the capacity of the storage battery and the graded direct current load, wherein the second time is greater than the first time;
the first power supply stopping module is used for stopping supplying power to the third-level load if the target substation does not recover power supply within the first time after the alternating current is lost;
and the second power supply stopping module is used for stopping supplying power to the second-stage load if the power supply of the target transformer substation is not recovered within a second time after the alternating current is lost.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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Cited By (1)
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| CN114094594B (en) | 2024-04-19 |
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