CN110838721A - Power distribution network power distribution method, device, equipment and storage medium - Google Patents
Power distribution network power distribution method, device, equipment and storage medium 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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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 application discloses a power distribution network power distribution method, a device, equipment and a storage medium, wherein the method comprises the following steps: when the AC system of the converter station is detected to be out of order, judging whether the converter station before the failure is a DC voltage control station or not, if so, selecting one of the converter stations in normal operation to be set as a new DC voltage control station, distributing the power of the local load of the converter station to the converter station in normal operation, and carrying out load shedding according to the importance of the load and the size of the power; and when the AC system of the converter station is detected to be recovered to be normal, judging whether the converter station is a DC voltage control station after the AC system is recovered, if so, resetting the converter station as the DC voltage control station, and performing power distribution of the local load again. The power supply recovery method and the power supply recovery device solve the technical problems that after the alternating current power grid fault occurs, power supply can be recovered only after the fault of the alternating current power grid is cleared, and during power failure, operation of important loads has to be stopped, so that loss of the important loads is caused.
Description
Technical Field
The present application relates to the field of dc power grid power supply technologies, and in particular, to a power distribution network power distribution method, apparatus, device, and storage medium.
Background
With the development of power electronic technology, compared with an alternating current power grid, a direct current power grid has technical and economic advantages in many fields, and has good development prospect. Compared with an alternating current power grid, the direct current power grid has no phase and harmonic problems, so that the direct current power grid can provide higher-quality electric energy. Meanwhile, the new energy power generation and energy storage device generates electric energy in a direct current mode, the electric energy generation mode comprises offshore power generation, photovoltaic power generation or chemical energy storage batteries and the like, and a direct current power grid can be connected to an energy storage and distributed power supply more conveniently. With the increasing of power electronic equipment in user loads, the power electronization of the power loads makes the direct current link of load power supply more and more common. The form of a future power distribution network is a multi-level ring network formed by a plurality of voltage grades, an alternating current-direct current hybrid connection, an interconnection interface with unified specifications and a flexible ad hoc network based on a complex network theory. The direct current distribution network is a basic supporting link of the future energy Internet, and the alternating current-direct current system has good application prospect in mutual power supporting through the direct current distribution network.
After the existing alternating current power grid fails to cause protection action, the alternating current bus is subjected to voltage loss, and load loss is caused. For example, when a fault occurs at a certain ac port, for example, when an ac grid in which the converter station Sn is located triggers a protection operation due to an external fault, the ac switch Kn1 needs to be opened to isolate the ac grid Sn in order not to affect the normal operation of the dc distribution network, which may cause the Sn ac grid to lose the class 1 ac Load _ n1 and the class 2 ac Load _ n 2. In this case, the power can only be restored after the ac grid fault is cleared, and during the power outage, the operation of the important load has to be stopped, resulting in a loss of the important load.
Disclosure of Invention
According to the power distribution network power distribution method, device, equipment and storage medium provided by the application, when an alternating current system with a converter station fails, whether the converter station is a direct current voltage control station before the alternating current system fails is judged firstly, if yes, one of the other converter stations in normal operation is selected to be set as a new direct current voltage converter station, and the power of the original direct current converter station is distributed to the other converter stations in normal operation, so that when a certain alternating current port fails, an important load responsible for the alternating current port can still normally operate, and load loss cannot occur. The technical problem that power can be recovered only after the fault of the alternating current power grid is cleared in the prior art, and during power failure, operation of important loads has to be stopped, and then loss of the important loads is caused is solved.
The application provides a power distribution network power distribution method in a first aspect, which includes:
when the AC system of the converter station is detected to be out of order, judging whether the AC system of the converter station is a DC voltage control station before the AC system of the converter station is out of order or not, if so, selecting one of the converter stations in normal operation to be set as a new DC voltage control station, distributing the power of the local load of the converter station to the converter stations in normal operation, and carrying out load shedding according to the importance of the load and the size of the power;
and when the AC system of the converter station is detected to be recovered to be normal, judging whether the converter station is a DC voltage control station after recovery, if so, resetting the converter station as the DC voltage control station, and performing power distribution of the local load again.
Optionally, the load shedding according to the importance of the load and the power magnitude comprises: when the capacity of the converter station simultaneously meets the first-class load and the second-class load, recovering the power supply of the first-class load and the power supply of the second-class load; and when the capacity of the converter station cannot simultaneously meet the first-class load and the second-class load, recovering the power supply of the first-class load and cutting off the second-class load.
Optionally, before performing load shedding according to the importance of the load and the power level, the method further includes: switching the control mode of the converter station to a voltage/frequency control mode.
Optionally, before the performing power allocation again, the method further includes: switching the control mode of the converter station to a voltage/frequency control mode.
Optionally, the determining whether the converter station is a dc voltage control station before the fault occurs further includes: and if not, distributing the power of the local load of the converter station to the converter station which normally operates, and carrying out load shedding according to the importance of the load and the size of the power.
Optionally, the determining whether the converter station is a dc voltage control station after the recovery further includes: and if not, the power distribution of the local load is carried out again.
This application second aspect provides a distribution network power distribution device, includes:
the fault setting module is used for judging whether the converter station is a direct current voltage control station before the fault occurs when the fault occurs in the alternating current system of the converter station, selecting one converter station in normal operation if the converter station is the direct current voltage control station, setting the selected converter station as a new direct current voltage control station, distributing the power of the local load of the converter station to the converter station in normal operation, and carrying out load shedding according to the importance of the load and the power;
and the fault recovery module is used for judging whether the converter station is a direct-current voltage control station after recovery when the AC system of the converter station is detected to be recovered to be normal, resetting the converter station as the direct-current voltage control station if the converter station is recovered to be the direct-current voltage control station, and performing power distribution of local loads again.
Optionally, the fault setting module is further configured to: when the capacity of the converter station simultaneously meets the first-class load and the second-class load, recovering the power supply of the first-class load and the power supply of the second-class load; and when the capacity of the converter station cannot simultaneously meet the first-class load and the second-class load, recovering the power supply of the first-class load and cutting off the second-class load.
A third aspect of the present application provides a power distribution network power distribution apparatus, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the power distribution network power distribution method of the first aspect according to instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for performing the power distribution network power distribution method of the first aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a power distribution network power distribution method, which comprises the following steps:
when the AC system of the converter station is detected to be out of order, judging whether the converter station is a DC voltage control station before the converter station is out of order or not, if so, selecting one converter station in normal operation to be set as a new DC voltage control station, distributing the power of the local load of the converter station to the converter station in normal operation, and carrying out load shedding according to the importance of the load and the power;
and when the AC system of the converter station is detected to be recovered to be normal, judging whether the converter station is a DC voltage control station after recovery, if so, resetting the DC voltage control station, and performing power distribution of the local load again.
According to the power distribution network power distribution method, when the AC system with the converter station fails, whether the converter station is a DC voltage control station before the AC system fails is judged, if yes, one of the other converter stations which normally operate is selected to be set as a new DC voltage converter station, and the power of the original DC converter station is distributed to the other converter stations which normally operate, so that when a certain AC port fails, the important load responsible for the AC port can still normally operate, and load loss cannot occur. The technical problem that power can be recovered only after the fault of the alternating current power grid is cleared in the prior art, and during power failure, operation of important loads has to be stopped, and then loss of the important loads is caused is solved.
Drawings
Fig. 1 is a schematic flowchart of an embodiment of a power distribution network power distribution method provided in the present application;
fig. 2 is a schematic diagram of a multi-terminal flexible dc power distribution network according to an embodiment of a power distribution network power distribution method provided in the present application;
fig. 3 is a schematic flowchart of another embodiment of a power distribution network power distribution method provided in the present application;
fig. 4 is a control block diagram of an embodiment of a power distribution network power distribution method provided in the present application;
fig. 5 is a block diagram of a recovery grid-connection strategy of an embodiment of a power distribution network power distribution method provided by the present application;
fig. 6 is a schematic structural diagram of an embodiment of a power distribution network power distribution apparatus provided in the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
According to the power distribution network power distribution method, device, equipment and storage medium provided by the application, when an alternating current system with a converter station fails, whether the converter station is a direct current voltage control station before the alternating current system fails is judged firstly, if yes, one of other converter stations in normal operation is selected to be set as a new direct current voltage converter station, and the power of the original direct current converter station is distributed to the other converter stations in normal operation, so that when a certain alternating current port fails, an important load responsible for the alternating current port can still normally operate, and load loss cannot occur. The technical problem that power can be recovered only after the fault of the alternating current power grid is cleared in the prior art, and during power failure, operation of important loads has to be stopped, and then loss of the important loads is caused is solved.
Referring to fig. 1 and 2, fig. 4 and fig. 5, fig. 1 is a schematic flowchart of an embodiment of a power distribution network power distribution method provided in the present application; fig. 2 is a schematic diagram of a multi-terminal flexible dc power distribution network according to an embodiment of a power distribution network power distribution method provided in the present application; fig. 4 is a control block diagram of an embodiment of a power distribution network power distribution method provided in the present application; fig. 5 is a block diagram of a recovery grid-connection strategy of an embodiment of a power distribution network power distribution method provided by the present application;
a first aspect of an embodiment of the present application provides a power distribution network power distribution method, including:
100, when detecting that an alternating current system of the converter station has a fault, judging whether the converter station is a direct current voltage control station before the fault occurs, if so, selecting one converter station in normal operation to be set as a new direct current voltage control station, distributing the power of a local load of the converter station to the converter station in normal operation, and carrying out load shedding according to the importance of the load and the power;
200, when the AC system of the converter station is detected to be recovered to be normal, judging whether the converter station is a DC voltage control station after being recovered, if so, resetting the DC voltage control station, and performing power distribution of the local load again.
It should be noted that the power distribution network power distribution method provided in the embodiment of the present application is implemented based on the N-terminal flexible dc power distribution network shown in fig. 2, where S1, S2, S3 to Sn are ac power grids, S1 is connected to the converter station 1 through switches K11 and K12 and then is connected to the dc power grid, and the class 1 ac Load-11 is connected to the dc power grid through switches K11, K13, and K14And the class-2 AC Load-12 is connected to an AC power grid through K11, K13 and K15. Similarly, the local loads of the alternating current power grids from S2 to Sn are respectively connected to the direct current power distribution network and the alternating current power grid through the alternating current switches. In the direct current power distribution network, n converter stations bear respective power, and one of the converter stations is selected and set as a direct current voltage control station. When the low-voltage side AC bus voltage Uac < Uac of the AC substation at a certain end is detectedset1When the voltage of the alternating current bus is smaller than a preset low-voltage fixed value and is smaller than the voltage fixed value and exceeds a first preset time, the alternating current bus is considered to be under voltage loss, the control system disconnects the alternating current incoming line switch Kn1, one of the other converter stations is selected as a new converter station to replace a control function of the converter station n, the new converter station is set according to the type of the converter station n, namely whether the converter station n is a direct current voltage control station before a fault is judged, if yes, one of the other normally-operated (n-1) converter stations needs to be selected as the new direct current voltage control station, the local load power of the converter station n is distributed to the other converter stations, and load shedding is carried out according to the load importance and the power magnitude. Load shedding means that when the capacity of the converter station n cannot fully support the class 1 and class 2 loads, priority needs to be set to cut off the corresponding loads to guarantee power supply. It can be understood that the low voltage setting value is generally lower than 0.75pu, and may also be set according to an actual device, and the first preset time may be set according to a device requirement of an actual application, which is not limited herein. In this embodiment, the time exceeds 50 cycles, i.e., one second. The type 1 load is an important load needing priority guarantee and generally belongs to a load which cannot be powered off, such as a government, a hospital or a bank. The class 2 load refers to a load that can be powered off, such as residential electricity.
When the ac voltage of the ac network is restored, i.e. when the low-side ac bus voltage Uac > Uac of the ac substation at a certain end is detectedset2When the voltage of the low-voltage side alternating current bus exceeds the low-voltage fixed value and exceeds the second preset time, a control mode is set according to the type of the recovered converter station, namely, the converter station is judged to be in the switching stateAnd if the current station n is the direct-current voltage control station after the operation is recovered, transferring the control right of the direct-current voltage control station set during the fault period of the converter station n to the converter station n, recovering the power supply of all loads, and recovering the grid-connected operation of the converter n again. It is understood that the second preset time can be set according to the requirement of the device in practical application, and is not limited numerically herein.
Referring to fig. 3, a schematic flow chart of another embodiment of a power distribution network power distribution method provided in the present application is shown;
further, 110, the load shedding according to the importance of the load and the power comprises: when the capacity of the converter station simultaneously meets the first-class load and the second-class load, the power supply of the first-class load and the power supply of the second-class load are recovered; and when the capacity of the converter station cannot simultaneously meet the first-class load and the second-class load, restoring the power supply of the first-class load and cutting off the second-class load.
It should be noted that the strategy of load shedding is that if the capacity of the converter station n can support the type 1 load and the type 2 load, the load shedding is not needed; and if the capacity of the converter station n is not enough to support the sum of the type 1 load and the type 2 load, cutting off the type 2 load and ensuring the power supply of the type 1 load. Through the load shedding strategy, the power supply of the class 1 load is preferentially ensured, and the power failure of the class 1 load caused by power supply failure is avoided.
Further, before load shedding according to the importance of the load and the power, the method further comprises the following steps: the control mode of the converter station is switched to the voltage/frequency control mode.
Before load shedding is performed according to the importance of the load and the power, the control converter station n is switched to the voltage/frequency control mode and then load shedding operation is performed.
Further, before performing power allocation again, the method further includes: the control mode of the converter station is switched to the voltage/frequency control mode.
Before power distribution is resumed, the control mode of the converter station n is switched to the voltage/frequency control mode.
Further, judging whether the converter station is a direct current voltage control station before the converter station fails further comprises: and if not, distributing the power of the local load of the converter station to the converter station which normally operates, and carrying out load shedding according to the importance of the load and the power.
It should be noted that, if the converter station n where the ac fault is located is the dc voltage control station before the fault, it is necessary to select one converter station from the converter station 1 to the converter station (n-1) to set as the dc voltage control station and set as a new converter station, take over the dc voltage control right of the converter station n, and proportionally allocate the power level of the converter station n to the remaining converter stations. And meanwhile, controlling the converter station n to be switched into a voltage/frequency control mode, and carrying out load shedding according to the importance of the load and the power. And if the capacity of the converter station n meets the requirements of the type 1 load and the type 2 load, closing the switches Kn3, Kn4 and Kn5 and recovering the power supply of all local loads. If the capacity of the converter station n cannot meet the requirements of the type 1 load and the type 2 load, the switches Kn3 and Kn4 are closed, and the power supply of the local type 1 load is recovered. The allocation is made according to the capacity of each converter station, e.g. the capacity of the converter station 1 is P1The capacity of the converter station 2 is P2The capacity of the converter station 3 is P3And so on, the capacity of the converter station (n-1) is Pn-1If the total power to be distributed is P, the capacity of the converter station 1 is P × P1/(P1+P2+P3+...+Pn-1) The capacity divided by the converter station 2 is P x P2/(P1+P2+P3+...+Pn-1) The capacity divided by the converter station 3 is P x P3/(P1+P2+P3+...+Pn-1) And so on, the capacity divided by the converter station (n-1) is Pn-1/(P1+P2+P3+...+Pn-1)。
If the converter station n where the alternating current fault is located is an active power control station before the fault, the current control mode of each of the other converter stations is kept unchanged, and similarly, the power of the converter station n is proportionally distributed to the other converter stations. And meanwhile, controlling the converter station n to be switched into a voltage/frequency control mode, and carrying out load shedding according to the importance of the load and the power. And if the capacity of the converter station n meets the requirements of the type 1 load and the type 2 load, closing the switches Kn3, Kn4 and Kn5 and recovering the power supply of all local loads. If the capacity of the converter station n cannot meet the requirements of the type 1 load and the type 2 load, the switches Kn3 and Kn4 are closed, and the power supply of the local type 1 load is recovered.
Further, judging whether the converter station is a direct current voltage control station after recovery, further comprising: and if not, the power distribution of the local load is carried out again.
It should be noted that, when the ac voltage of the ac power grid is recovered, the converter station n that needs to be in the ac voltage/frequency control mode is converted into the grid-connected mode again, the control mode of the converter station n is switched from the ac voltage/frequency control mode to the dc voltage/reactive power control mode, and meanwhile, the grid-connected operation of the converter station n needs to be recovered again according to the control mode of the converter station n after recovery.
If the converter station n is the direct-current voltage control station after the fault is recovered, the direct-current voltage control right of the current direct-current voltage control station, namely the direct-current voltage control right of the new converter station, needs to be released, the direct-current voltage control right is switched into a power control mode, the converter station n takes over the direct-current voltage control right, and then the power of the new converter station is distributed to all the converter stations in proportion. Meanwhile, the switches Kn1, Kn3, Kn4 and Kn5 are closed, and the power supply of all local loads is recovered.
And if the converter station n is the active power control station after the fault is recovered, keeping the current control mode of the rest converter stations unchanged, and distributing the power of the new converter station to all the converter stations in proportion. Meanwhile, the switches Kn1, Kn3, Kn4 and Kn5 are closed, and the power supply of all local loads is recovered.
Referring to fig. 6, a schematic structural diagram of an embodiment of a power distribution network power distribution apparatus provided in the present application is shown.
For ease of understanding, a second aspect of the present application provides a power distribution network power distribution apparatus comprising:
the fault setting module 10 is configured to, when a fault of an ac system of the converter station is detected, determine whether the converter station is a dc voltage control station before the fault occurs, select one of the converter stations that normally operate if the converter station is the dc voltage control station, set the selected converter station as a new dc voltage control station, distribute power of a local load of the converter station to the converter station that normally operates, and perform load shedding according to importance of the load and the magnitude of the power;
and the fault recovery module 20, when detecting that the ac system of the converter station is recovered to normal, determines whether the ac system of the converter station is a dc voltage control station after recovery, and if so, resets the ac system to the dc voltage control station and performs power distribution of the local load again.
Further, the fault setting module is further configured to: the fault setting module is further configured to: when the capacity of the converter station simultaneously meets the first-class load and the second-class load, the power supply of the first-class load and the power supply of the second-class load are recovered; and when the capacity of the converter station cannot simultaneously meet the first-class load and the second-class load, restoring the power supply of the first-class load and cutting off the second-class load.
A third aspect of the embodiments of the present application provides a power distribution network power distribution device, where the device includes a processor and a memory:
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is configured to execute the power distribution network power distribution method of the above-described embodiment according to instructions in the program code.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which is used to store program codes, where the program codes are used to execute the power distribution network power distribution method of the embodiments.
The terms "comprises," "comprising," and any other variation thereof in the description and the drawings described above are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, 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 application 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 unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A power distribution network power distribution method is characterized by comprising the following steps:
when the AC system of the converter station is detected to be out of order, judging whether the AC system of the converter station is a DC voltage control station before the AC system of the converter station is out of order or not, if so, selecting one of the converter stations in normal operation to be set as a new DC voltage control station, distributing the power of the local load of the converter station to the converter stations in normal operation, and carrying out load shedding according to the importance of the load and the size of the power;
and when the AC system of the converter station is detected to be recovered to be normal, judging whether the converter station is a DC voltage control station after recovery, if so, resetting the converter station as the DC voltage control station, and performing power distribution of the local load again.
2. The power distribution network power distribution method of claim 1, wherein load shedding according to the importance of the load and the power level comprises: when the capacity of the converter station simultaneously meets the first-class load and the second-class load, recovering the power supply of the first-class load and the power supply of the second-class load; and when the capacity of the converter station cannot simultaneously meet the first-class load and the second-class load, recovering the power supply of the first-class load and cutting off the second-class load.
3. The power distribution network power distribution method of claim 1, wherein before the load shedding according to the importance of the load and the power level, the method further comprises: switching the control mode of the converter station to a voltage/frequency control mode.
4. The power distribution network power distribution method of claim 1, wherein the performing and resuming power distribution of the local load further comprises, before: switching the control mode of the converter station to a voltage/frequency control mode.
5. The method according to claim 1, wherein said determining whether the converter station is a dc voltage control station before the ac system fails further comprises: and if not, distributing the power of the local load of the converter station to the converter station which normally operates, and carrying out load shedding according to the importance of the load and the size of the power.
6. The power distribution network power distribution method according to claim 1, wherein the determining whether the converter station is a dc voltage control station after recovery further comprises: and if not, the power distribution of the local load is carried out again.
7. A power distribution network power distribution apparatus, comprising:
the fault setting module is used for judging whether the converter station is a direct current voltage control station before the fault occurs when the fault occurs in the alternating current system of the converter station, selecting one converter station in normal operation if the converter station is the direct current voltage control station, setting the selected converter station as a new direct current voltage control station, distributing the power of the local load of the converter station to the converter station in normal operation, and carrying out load shedding according to the importance of the load and the power;
and the fault recovery module is used for judging whether the converter station is a direct-current voltage control station after recovery when the AC system of the converter station is detected to be recovered to be normal, resetting the converter station as the direct-current voltage control station if the converter station is recovered to be the direct-current voltage control station, and performing power distribution of local loads again.
8. The power distribution network power distribution apparatus of claim 7, wherein the fault setting module is further configured to: when the capacity of the converter station simultaneously meets the first-class load and the second-class load, recovering the power supply of the first-class load and the power supply of the second-class load; and when the capacity of the converter station cannot simultaneously meet the first-class load and the second-class load, recovering the power supply of the first-class load and cutting off the second-class load.
9. A power distribution network power distribution apparatus, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the power distribution network power distribution method of any one of claims 1-6 according to instructions in the program code.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium is configured to store program code for performing the power distribution network power distribution method of any of claims 1-6.
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| CN201911143003.XA CN110838721A (en) | 2019-11-20 | 2019-11-20 | Power distribution network power distribution method, device, equipment and storage medium |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119316A (en) * | 2015-08-31 | 2015-12-02 | 上海交通大学 | VSC-MTDC (Voltage source converter-multi-terminal high voltage direct current) voltage control method for offshore wind farm integration |
| CN105281356A (en) * | 2015-11-10 | 2016-01-27 | 中国科学院电工研究所 | Coordination control method of multi-terminal flexible direct-current power transmission system |
| CN105576646A (en) * | 2016-01-06 | 2016-05-11 | 山东大学 | Additional active signal-based balance control system and method for VSC-MTDC system |
| CN105790294A (en) * | 2016-02-29 | 2016-07-20 | 中国科学院电工研究所 | Uninterrupted safe transfer method for loads of AC/DC hybrid power distribution network |
| CN107276083A (en) * | 2017-07-17 | 2017-10-20 | 中国科学院电工研究所 | A kind of alterating and direct current network operation control method towards energy internet |
| CN107579538A (en) * | 2017-10-16 | 2018-01-12 | 南京南瑞继保电气有限公司 | Method and device is changed and exited to DC voltage transverter |
| CN107887906A (en) * | 2017-11-17 | 2018-04-06 | 北京智中电力电子科技有限公司 | A kind of method of operation management method of uninterrupted power exchanger |
| CN207884359U (en) * | 2017-12-27 | 2018-09-18 | 国网辽宁省电力有限公司电力科学研究院 | A kind of safety stabilization control system integration layered cooperative structure |
| CN109120005A (en) * | 2018-06-22 | 2019-01-01 | 华北电力大学（保定） | A kind of Multi-end flexible direct current transmission system power coordination control method |
| CN109378852A (en) * | 2018-10-31 | 2019-02-22 | 中国电力科学研究院有限公司 | A kind of method and system obtaining soft straight power grid DC neutral bus-bar fault measure amount |
| CN109617112A (en) * | 2018-12-14 | 2019-04-12 | 国网江苏省电力有限公司经济技术研究院 | Modified DC voltage control strategy suitable for multiterminal flexible direct current system |
| CN109687471A (en) * | 2019-02-01 | 2019-04-26 | 国网江苏省电力有限公司 | A kind of urgent accurate control method and system of extensive interruptible load |
-
2019
- 2019-11-20 CN CN201911143003.XA patent/CN110838721A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119316A (en) * | 2015-08-31 | 2015-12-02 | 上海交通大学 | VSC-MTDC (Voltage source converter-multi-terminal high voltage direct current) voltage control method for offshore wind farm integration |
| CN105281356A (en) * | 2015-11-10 | 2016-01-27 | 中国科学院电工研究所 | Coordination control method of multi-terminal flexible direct-current power transmission system |
| CN105576646A (en) * | 2016-01-06 | 2016-05-11 | 山东大学 | Additional active signal-based balance control system and method for VSC-MTDC system |
| CN105790294A (en) * | 2016-02-29 | 2016-07-20 | 中国科学院电工研究所 | Uninterrupted safe transfer method for loads of AC/DC hybrid power distribution network |
| CN107276083A (en) * | 2017-07-17 | 2017-10-20 | 中国科学院电工研究所 | A kind of alterating and direct current network operation control method towards energy internet |
| CN107579538A (en) * | 2017-10-16 | 2018-01-12 | 南京南瑞继保电气有限公司 | Method and device is changed and exited to DC voltage transverter |
| CN107887906A (en) * | 2017-11-17 | 2018-04-06 | 北京智中电力电子科技有限公司 | A kind of method of operation management method of uninterrupted power exchanger |
| CN207884359U (en) * | 2017-12-27 | 2018-09-18 | 国网辽宁省电力有限公司电力科学研究院 | A kind of safety stabilization control system integration layered cooperative structure |
| CN109120005A (en) * | 2018-06-22 | 2019-01-01 | 华北电力大学（保定） | A kind of Multi-end flexible direct current transmission system power coordination control method |
| CN109378852A (en) * | 2018-10-31 | 2019-02-22 | 中国电力科学研究院有限公司 | A kind of method and system obtaining soft straight power grid DC neutral bus-bar fault measure amount |
| CN109617112A (en) * | 2018-12-14 | 2019-04-12 | 国网江苏省电力有限公司经济技术研究院 | Modified DC voltage control strategy suitable for multiterminal flexible direct current system |
| CN109687471A (en) * | 2019-02-01 | 2019-04-26 | 国网江苏省电力有限公司 | A kind of urgent accurate control method and system of extensive interruptible load |
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