CN113872256A - Photovoltaic grid-connected device reactive compensation-based transformer area voltage management method and device - Google Patents
Photovoltaic grid-connected device reactive compensation-based transformer area voltage management method and device Download PDFInfo
- Publication number
- CN113872256A CN113872256A CN202110943284.8A CN202110943284A CN113872256A CN 113872256 A CN113872256 A CN 113872256A CN 202110943284 A CN202110943284 A CN 202110943284A CN 113872256 A CN113872256 A CN 113872256A
- Authority
- CN
- China
- Prior art keywords
- photovoltaic grid
- connected device
- reactive
- reactive power
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007726 management method Methods 0.000 title claims abstract description 24
- 238000012937 correction Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 36
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000011217 control strategy Methods 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 238000009472 formulation Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
-
- 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
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a transformer area voltage management method and device based on reactive power compensation of a photovoltaic grid-connected device. The transformer area voltage management method based on the reactive compensation of the photovoltaic grid-connected device comprises the following steps: making a sectional reactive power regulation strategy based on the voltage fluctuation condition of a photovoltaic grid-connected point and the real-time available capacity of a photovoltaic grid-connected device, wherein the sectional reactive power regulation strategy is used for deciding the reactive incremental regulation quantity of the photovoltaic grid-connected device under the condition that the voltage of the grid-connected point fluctuates differently; based on the reactive power operation range of the photovoltaic grid-connected device, correcting the segmented reactive power regulation strategy; and determining a reactive power instruction of the photovoltaic grid-connected device according to the segmental reactive power regulation strategy before correction and the segmental reactive power regulation strategy after correction, and issuing the reactive power instruction to the photovoltaic grid-connected device.
Description
Technical Field
The invention relates to the technical field of power quality management, in particular to a transformer area voltage management method and device based on reactive compensation of a photovoltaic grid-connected device, a storage medium and electronic equipment.
Background
The voltage control is one of the main problems faced by the transformer area operation control, in particular to the low-voltage control problem, and the SVG device is configured on the low-voltage side of the transformer area in the conventional method, so that the continuous dynamic reactive compensation is carried out on the low-voltage bus, and the voltage of the low-voltage side of the transformer area is ensured to operate in a normal range. However, the method increases the costs of equipment configuration, operation and maintenance management and the like of the transformer area, and meanwhile, the problem of the voltage at the tail end of a transformer area line cannot be effectively solved, and the transformer area voltage control capability is poor.
With the 'carbon neutralization, carbon peak-to-peak' goal proposed, the installed capacity of distributed photovoltaic is further rapidly increased. At present, the photovoltaic grid-connected device mainly adopts an MPPT operation mode, the MPPT operation mode does not participate in active support of a power grid, but the photovoltaic grid-connected device has better reactive voltage regulation potential, and by combining reactive regulation resource utilization of the MPPT operation mode, the voltage management capability of a transformer area can be greatly improved, the configuration of a transformer area SVG device is saved, the construction cost of the transformer area is reduced, and the total benefit of the photovoltaic grid-connected device is improved.
However, a technical scheme that the voltage of the transformer area can be regulated by using the reactive voltage regulation resource of the photovoltaic grid-connected device is lacked at present, so that the photovoltaic grid-connected operation benefit of the transformer area cannot be improved, and the SVG configuration cost of the transformer area cannot be reduced.
Disclosure of Invention
In order to solve the technical problems that the transformer area voltage management can not be realized by using the reactive voltage regulation resource of the photovoltaic grid-connected device, the transformer area photovoltaic grid-connected operation benefit cannot be improved, and the transformer area SVG configuration cost cannot be reduced, the invention provides a transformer area voltage management method and device based on the reactive compensation of the photovoltaic grid-connected device, a storage medium and electronic equipment. The reactive dynamic rapid compensation method for the photovoltaic grid-connected device is provided by combining a photovoltaic reactive power regulation space of the transformer area around the transformer area voltage management problem, the reactive power of the photovoltaic grid-connected device is adjusted in real time based on transformer area voltage fluctuation, the transformer area voltage dynamic characteristic is improved, the transformer area voltage safe operation level is improved, the transformer area power supply quality is improved, and the transformer area SVG configuration cost is also reduced.
According to one aspect of the invention, a transformer area voltage management method based on reactive compensation of a photovoltaic grid-connected device is provided, and comprises the following steps:
making a sectional reactive power regulation strategy based on the voltage fluctuation condition of a photovoltaic grid-connected point and the real-time available capacity of a photovoltaic grid-connected device, wherein the sectional reactive power regulation strategy is used for deciding the reactive incremental regulation quantity of the photovoltaic grid-connected device under the condition that the voltage of the grid-connected point fluctuates differently;
based on the reactive power operation range of the photovoltaic grid-connected device, correcting the segmented reactive power regulation strategy; and
and determining a reactive power instruction of the photovoltaic grid-connected device according to the segmental reactive power regulation strategy before correction and the segmental reactive power regulation strategy after correction, and issuing the reactive power instruction to the photovoltaic grid-connected device.
Optionally, the method further comprises:
and establishing a reactive power regulation operation boundary of the photovoltaic grid-connected device according to the real-time available capacity of the photovoltaic grid-connected device and the active power output at different moments, wherein the reactive power regulation operation boundary is used for indicating the incidence relation between the reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments.
Optionally, the reactive power regulation operation boundary of the photovoltaic grid-connected device is as follows:
wherein S isPVIs the photovoltaic grid-connected device capacity, PPV,tIs the active power, Q, of the photovoltaic grid-connected device at time tPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,max,tAnd the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at the time t.
Optionally, the segmented reactive power regulation strategy is as follows: when the voltage fluctuation of the photovoltaic grid-connected point is in a dead zone of regulation, the reactive increment of the photovoltaic grid-connected device needing to be regulated is equal to zero; and when the voltage fluctuation of the photovoltaic grid-connected point exceeds the dead zone of regulation, linearly regulating the reactive power increment of the photovoltaic grid-connected device to be regulated based on droop control.
Optionally, a calculation formula of the segmented reactive power regulation and control strategy is as follows:
wherein, is Δ QPV,set,tIs the reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t,Utis the grid-connected point voltage, U, of the photovoltaic grid-connected device at time tnIs the nominal voltage, K, of the distribution system in the distribution areauIs the voltage regulation factor and epsilon is the regulation dead band.
Optionally, the modified segmented reactive power regulation strategy is as follows:
wherein, delta Q'PV,set,tIs the corrected reactive incremental adjustment quantity, Q, of the photovoltaic grid-connected device at the time tPV,set,t-1And the reactive instruction is the reactive instruction of the photovoltaic grid-connected device at the moment t-1.
Optionally, the reactive instruction of the photovoltaic grid-connected device is:
QPV,set,t＝QPV,set,t-1+ΔQ'PV,set,t
wherein Q isPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,set,t-1Is a reactive command of the photovoltaic grid-connected device at time t-1, delta Q'PV,set,tAnd the corrected reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t is obtained.
According to another aspect of the invention, a transformer area voltage management device based on reactive compensation of a photovoltaic grid-connected device is provided, which comprises:
the strategy making module is used for making a sectional reactive power regulation and control strategy based on the voltage fluctuation condition of a photovoltaic grid-connected point and the real-time available capacity of the photovoltaic grid-connected device, wherein the sectional reactive power regulation and control strategy is used for deciding the reactive increment adjustment quantity of the photovoltaic grid-connected device under the condition that the voltage of the grid-connected point fluctuates differently;
the strategy correction module is used for correcting the segmented reactive power regulation strategy based on the reactive power operation range of the photovoltaic grid-connected device; and
and the reactive instruction determining module is used for determining a reactive instruction of the photovoltaic grid-connected device according to the segmental reactive power regulation strategy before correction and the segmental reactive power regulation strategy after correction, and sending the reactive instruction to the photovoltaic grid-connected device.
Optionally, the apparatus further comprises:
and the reactive power regulation operation boundary construction module is used for constructing a reactive power regulation operation boundary of the photovoltaic grid-connected device according to the real-time available capacity of the photovoltaic grid-connected device and the active power output at different moments, wherein the reactive power regulation operation boundary is used for indicating the incidence relation between the reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments.
Optionally, the reactive power regulation operation boundary of the photovoltaic grid-connected device is as follows:
wherein S isPVIs the photovoltaic grid-connected device capacity, PPV,tIs the active power, Q, of the photovoltaic grid-connected device at time tPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,max,tAnd the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at the time t.
Optionally, the segmented reactive power regulation strategy is as follows: when the voltage fluctuation of the photovoltaic grid-connected point is in a dead zone of regulation, the reactive increment of the photovoltaic grid-connected device needing to be regulated is equal to zero; and when the voltage fluctuation of the photovoltaic grid-connected point exceeds the dead zone of regulation, linearly regulating the reactive power increment of the photovoltaic grid-connected device to be regulated based on droop control.
Optionally, a calculation formula of the segmented reactive power regulation and control strategy is as follows:
wherein, is Δ QPV,set,tIs the reactive incremental regulation quantity, U, of the photovoltaic grid-connected device at the moment ttIs the grid-connected point voltage, U, of the photovoltaic grid-connected device at time tnIs the nominal voltage, K, of the distribution system in the distribution areauIs the voltage regulation factor and epsilon is the regulation dead band.
Optionally, the modified segmented reactive power regulation strategy is as follows:
wherein, delta Q'PV,set,tIs the corrected reactive incremental adjustment quantity, Q, of the photovoltaic grid-connected device at the time tPV,set,t-1And the reactive instruction is the reactive instruction of the photovoltaic grid-connected device at the moment t-1.
Optionally, the reactive instruction of the photovoltaic grid-connected device is:
QPV,set,t＝QPV,set,t-1+ΔQ'PV,set,t
wherein Q isPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,set,t-1Is a reactive command of the photovoltaic grid-connected device at time t-1, delta Q'PV,set,tAnd the corrected reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t is obtained.
According to a further aspect of the invention, there is provided a computer readable storage medium having stored thereon a computer program for executing the method of any of the above aspects of the invention.
According to still another aspect of the present invention, there is provided an electronic apparatus including: a processor; a memory for storing the processor-executable instructions; the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method according to any one of the above aspects of the present invention.
Therefore, according to the transformer area voltage management method and device based on the reactive compensation of the photovoltaic grid-connected device, firstly, the operation state of the photovoltaic grid-connected device and the voltage data of grid-connected points are read, the reactive power regulation operation boundary of the photovoltaic grid-connected device is built, then the reactive power control and grid-connected point voltage coupling relation of the photovoltaic grid-connected device is built, a segmented reactive power regulation strategy is designed according to the voltage fluctuation condition of the photovoltaic grid-connected points and the real-time available capacity of the photovoltaic grid-connected device, the reactive power instruction of the photovoltaic grid-connected device is dynamically adjusted, and the corresponding reactive power instruction is issued to the photovoltaic grid-connected device. Therefore, corresponding reactive power is rapidly provided through the internal response of the photovoltaic grid-connected device, the voltage management of the transformer area based on the reactive compensation of the photovoltaic grid-connected device is realized, the on-site reactive power continuous compensation is realized, and the voltage management capability of the transformer area is effectively improved. Moreover, on the basis of the original maximum power point tracking operation mode, available capacity resources of the photovoltaic grid-connected device are fully exerted, the voltage dynamic characteristic of the transformer area is improved, clean power generation is realized, active support is provided for a power distribution system, the photovoltaic grid-connected operation benefit is effectively improved, and the SVG configuration cost of the transformer area is also reduced.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
fig. 1 is a schematic flow chart of a transformer area voltage management method based on reactive compensation of a photovoltaic grid-connected device according to an exemplary embodiment of the present invention;
fig. 2 is a schematic diagram of reactive compensation of a platform area photovoltaic grid-connected device according to an exemplary embodiment of the present invention;
fig. 3 is a schematic diagram of a reactive power regulation strategy for a platform area photovoltaic grid-connected device according to an exemplary embodiment of the present invention;
fig. 4 is a schematic structural diagram of a transformer area voltage management device based on reactive compensation of a photovoltaic grid-connected device according to an exemplary embodiment of the present invention; and
fig. 5 is a structure of an electronic device according to an exemplary embodiment of the present invention.
Detailed Description
Hereinafter, example embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the invention and not all embodiments of the invention, with the understanding that the invention is not limited to the example embodiments described herein.
It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
It will be understood by those of skill in the art that the terms "first," "second," and the like in the embodiments of the present invention are used merely to distinguish one element, step, device, module, or the like from another element, and do not denote any particular technical or logical order therebetween.
It should also be understood that in embodiments of the present invention, "a plurality" may refer to two or more and "at least one" may refer to one, two or more.
It is also to be understood that any reference to any component, data, or structure in the embodiments of the invention may be generally understood as one or more, unless explicitly defined otherwise or stated to the contrary hereinafter.
In addition, the term "and/or" in the present invention is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In the present invention, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship.
It should also be understood that the description of the embodiments of the present invention emphasizes the differences between the embodiments, and the same or similar parts may be referred to each other, so that the descriptions thereof are omitted for brevity.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Embodiments of the invention are operational with numerous other general purpose or special purpose computing system environments or configurations, and with numerous other electronic devices, such as terminal devices, computer systems, servers, etc. Examples of well known terminal devices, computing systems, environments, and/or configurations that may be suitable for use with electronic devices, such as terminal devices, computer systems, servers, and the like, include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, hand-held or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, networked personal computers, minicomputer systems, mainframe computer systems, distributed cloud computing environments that include any of the above, and the like.
Electronic devices such as terminal devices, computer systems, servers, etc. may be described in the general context of computer system-executable instructions, such as program modules, being executed by a computer system. Generally, program modules may include routines, programs, objects, components, logic, data structures, etc. that perform particular tasks or implement particular abstract data types. The computer system/server may be practiced in distributed cloud computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed cloud computing environment, program modules may be located in both local and remote computer system storage media including memory storage devices.
Exemplary method
Fig. 1 is a schematic flow chart of a transformer area voltage governing method based on reactive compensation of a photovoltaic grid-connected device according to an exemplary embodiment of the present invention. The embodiment can be applied to an electronic device, as shown in fig. 1, and includes the following steps:
Specifically, because the SVG of the voltage management device of the transformer area is mainly installed at the low-voltage side of the distribution transformer at present, centralized reactive compensation is carried out at the head end of the transformer area, and the voltage problem of other nodes, especially the tail end, of the distribution circuit of the transformer area cannot be essentially and effectively solved. Therefore, in the embodiment, by combining with the photovoltaic grid-connected device resources of other nodes of the distribution line of the transformer area, a reactive power control and grid-connected point voltage coupling relation of the photovoltaic grid-connected device is established, and a segmented reactive power regulation and control strategy is made according to the voltage fluctuation condition of the photovoltaic grid-connected point and the real-time available capacity of the photovoltaic grid-connected device, so that the reactive increment adjustment quantity of the photovoltaic grid-connected device is decided under the condition that the grid-connected point voltage has different fluctuations, thereby dynamically and continuously compensating the reactive power and effectively improving the voltage management capability of the transformer area.
Optionally, the segmented reactive power regulation strategy is as follows: when the voltage fluctuation of the photovoltaic grid-connected point is in a dead zone of regulation, the reactive increment of the photovoltaic grid-connected device needing to be regulated is equal to zero; and when the voltage fluctuation of the photovoltaic grid-connected point exceeds the dead zone of regulation, linearly regulating the reactive power increment of the photovoltaic grid-connected device to be regulated based on droop control.
As an embodiment, the calculation formula of the segmented reactive power regulation strategy is as follows:
wherein, is Δ QPV,set,tIs the reactive incremental regulation quantity, U, of the photovoltaic grid-connected device at the moment ttIs the grid-connected point voltage, U, of the photovoltaic grid-connected device at time tnIs the nominal voltage, K, of the distribution system in the distribution areauIs the voltage regulation factor and epsilon is the regulation dead band.
Furthermore, according to an exemplary embodiment, the method further comprises: and establishing a reactive power regulation operation boundary of the photovoltaic grid-connected device according to the real-time available capacity of the photovoltaic grid-connected device and the active power output at different moments, wherein the reactive power regulation operation boundary is used for indicating the incidence relation between the reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments.
And, in one embodiment, the reactive power regulation operation boundary of the photovoltaic grid-connected device is:
wherein S isPVIs the photovoltaic grid-connected device capacity, PPV,tIs the active power, Q, of the photovoltaic grid-connected device at time tPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,max,tAnd the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at the time t.
Specifically, referring to fig. 2, the method provided in this embodiment further needs to read the operating state of the photovoltaic grid-connected device and the voltage data of the grid-connected point, and establish a reactive power regulation operation boundary of the photovoltaic grid-connected device. The reactive power regulation operation boundary is used for indicating an incidence relation between a reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments. Therefore, a basis is provided for correcting the segmented reactive power regulation and control strategy in the follow-up process.
And 102, correcting the segmented reactive power regulation and control strategy based on the reactive power operation range of the photovoltaic grid-connected device.
Specifically, the reactive power compensation difference characteristic when different voltages fluctuate is considered, a segmented reactive power regulation and control strategy is designed, the reactive power operation range of the photovoltaic grid-connected device in a reactive power regulation operation boundary is considered based on the voltage fluctuation condition of the grid-connected point of the photovoltaic grid-connected device, and the segmented reactive power regulation and control strategy is corrected.
Optionally, the modified segmented reactive power regulation strategy is as follows:
wherein, delta Q'PV,set,tIs the corrected reactive incremental adjustment quantity, Q, of the photovoltaic grid-connected device at the time tPV,set,t-1And the reactive instruction is the reactive instruction of the photovoltaic grid-connected device at the moment t-1.
And 103, determining a reactive power instruction of the photovoltaic grid-connected device according to the segmental reactive power regulation strategy before correction and the segmental reactive power regulation strategy after correction, and issuing the reactive power instruction to the photovoltaic grid-connected device.
Optionally, the reactive instruction of the photovoltaic grid-connected device is:
QPV,set,t＝QPV,set,t-1+ΔQ'PV,set,t
wherein Q isPV,set,tIs a reactive instruction, Q, of the photovoltaic grid-connected device at time tPV,set,t-1Is a reactive command of the photovoltaic grid-connected device at time t-1, delta Q'PV,set,tAnd the corrected reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t is obtained.
Specifically, in this embodiment, a segmental reactive power regulation and control strategy before correction is combined with a segmental reactive power regulation and control strategy after correction, so as to determine a reactive power instruction of the photovoltaic grid-connected device. Referring to fig. 3, according to the method for treating the voltage of the transformer area based on the reactive power compensation of the photovoltaic grid-connected device, the reactive power output instruction of the photovoltaic grid-connected device is adjusted in real time based on the voltage fluctuation of the transformer area, and the local reactive power continuous compensation is realized, so that the dynamic characteristic of the voltage of the transformer area is improved, the safe operation level of the voltage of the transformer area is effectively improved, and the power supply quality of the transformer area is improved.
Therefore, the transformer area voltage management method based on the reactive compensation of the photovoltaic grid-connected device, provided by the embodiment, has the following characteristics and advantages:
1) and the voltage control level of the distribution line in the transformer area is improved. At present, a voltage management device SVG of a transformer area is mainly installed on a low-voltage side of a distribution transformer, centralized reactive compensation is carried out at the head end of the transformer area, and the voltage problem of other nodes, particularly the tail end, of a transformer area distribution circuit cannot be essentially solved effectively. By combining the photovoltaic grid-connected device resources of other nodes of the distribution line of the transformer area, the reactive power is dynamically and continuously compensated, and the voltage management capability of the transformer area is effectively improved.
2) And the on-site reactive power continuous compensation of the photovoltaic grid-connected device is realized. And considering reactive compensation difference characteristics when different voltages fluctuate, designing a segmented reactive power regulation strategy, and adjusting a reactive power output instruction of the photovoltaic grid-connected device in real time based on the voltage fluctuation condition of a grid-connected point of the photovoltaic grid-connected device to realize on-site reactive power continuous compensation.
3) And the photovoltaic grid-connected operation benefit of the transformer area is improved. On the basis of an original maximum power point tracking operation mode, available capacity resources of a photovoltaic grid-connected device are fully played, the voltage dynamic characteristic of a transformer area is improved, clean power generation is realized, active support is provided for a power distribution system, the photovoltaic grid-connected operation benefit is effectively improved, and the SVG configuration cost of the transformer area is also reduced.
Exemplary devices
Fig. 4 is a schematic structural diagram of a transformer area voltage regulation device based on reactive compensation of a photovoltaic grid-connected device according to an exemplary embodiment of the present invention. As shown in fig. 4, the present embodiment includes:
the strategy making module 41 is used for making a sectional reactive power regulation and control strategy based on the voltage fluctuation condition of the photovoltaic grid-connected point and the real-time available capacity of the photovoltaic grid-connected device, wherein the sectional reactive power regulation and control strategy is used for deciding the reactive incremental regulation quantity of the photovoltaic grid-connected device under the condition that the voltage of the grid-connected point fluctuates differently;
the strategy correction module 42 is configured to correct the segmented reactive power regulation and control strategy based on a reactive power operation range of the photovoltaic grid-connected device; and
and the reactive instruction determining module 43 is configured to determine a reactive instruction of the photovoltaic grid-connected device according to the segmental reactive regulation strategy before the correction and the segmental reactive regulation strategy after the correction, and issue the reactive instruction to the photovoltaic grid-connected device.
In one example, the apparatus further comprises:
and the reactive power regulation operation boundary construction module is used for constructing a reactive power regulation operation boundary of the photovoltaic grid-connected device according to the real-time available capacity of the photovoltaic grid-connected device and the active power output at different moments, wherein the reactive power regulation operation boundary is used for indicating the incidence relation between the reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments.
Optionally, the reactive power regulation operation boundary establishing module is specifically configured to establish the following reactive power regulation operation boundaries:
wherein S isPVIs the photovoltaic grid-connected device capacity, PPV,tIs the active power, Q, of the photovoltaic grid-connected device at time tPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,max,tAnd the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at the time t.
Optionally, the policy making module is specifically configured to: when the voltage fluctuation of the photovoltaic grid-connected point is in a dead zone of regulation, the reactive increment of the photovoltaic grid-connected device needing to be regulated is equal to zero; and when the voltage fluctuation of the photovoltaic grid-connected point exceeds the dead zone of regulation, linearly regulating the reactive power increment of the photovoltaic grid-connected device to be regulated based on droop control.
Optionally, the strategy making module is specifically configured to make the following segmental reactive power regulation and control strategy:
wherein, is Δ QPV,set,tIs the reactive incremental regulation quantity, U, of the photovoltaic grid-connected device at the moment ttIs the grid-connected point voltage, U, of the photovoltaic grid-connected device at time tnIs the nominal voltage, K, of the distribution system in the distribution areauIs the voltage regulation factor and epsilon is the regulation dead band.
Optionally, the policy modification module is specifically configured to modify the following segmented reactive power regulation and control policies:
wherein, delta Q'PV,set,tIs the corrected reactive incremental adjustment quantity, Q, of the photovoltaic grid-connected device at the time tPV,set,t-1And the reactive instruction is the reactive instruction of the photovoltaic grid-connected device at the moment t-1.
Optionally, the reactive instruction determining module is specifically configured to determine the following reactive instructions:
QPV,set,t＝QPV,set,t-1+ΔQ'PV,set,t
wherein Q isPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,set,t-1Is a reactive command of the photovoltaic grid-connected device at time t-1, delta Q'PV,set,tAnd the corrected reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t is obtained.
Exemplary electronic device
Fig. 5 is a structure of an electronic device according to an exemplary embodiment of the present invention. The electronic device may be either or both of the first device and the second device, or a stand-alone device separate from them, which stand-alone device may communicate with the first device and the second device to receive the acquired input signals therefrom. FIG. 5 illustrates a block diagram of an electronic device in accordance with an embodiment of the present invention. As shown in fig. 5, the electronic device 50 includes one or more processors 51 and a memory 52.
The processor 51 may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.
The memory 52 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, Random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, Read Only Memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium and executed by the processor 51 to implement the method for information mining on historical change records of the software program of the various embodiments of the present invention described above and/or other desired functions. In one example, the electronic device may further include: an input device 53 and an output device 54, which are interconnected by a bus system and/or other form of connection mechanism (not shown).
The input device 53 may also include, for example, a keyboard, a mouse, and the like.
The output device 54 can output various information to the outside. The output devices 54 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, among others.
Of course, for simplicity, only some of the components of the electronic device that are relevant to the present invention are shown in fig. 5, omitting components such as buses, input/output interfaces, and the like. In addition, the electronic device may include any other suitable components, depending on the particular application.
Exemplary computer program product and computer-readable storage Medium
In addition to the above-described methods and apparatus, embodiments of the present invention may also be a computer program product comprising computer program instructions that, when executed by a processor, cause the processor to perform the steps in the method of information mining of historical change records according to various embodiments of the present invention described in the "exemplary methods" section above of this specification.
The computer program product may write program code for carrying out operations for embodiments of the present invention in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present invention may also be a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, cause the processor to perform the steps in the method of information mining of historical change records according to various embodiments of the present invention described in the "exemplary methods" section above of this specification.
The computer-readable storage medium may take any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may include, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present invention have been described above with reference to specific embodiments, but it should be noted that the advantages, effects, etc. mentioned in the present invention are only examples and are not limiting, and the advantages, effects, etc. must not be considered to be possessed by various embodiments of the present invention. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the invention is not limited to the specific details described above.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The block diagrams of devices, apparatuses, systems involved in the present invention are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
The method and apparatus of the present invention may be implemented in a number of ways. For example, the methods and apparatus of the present invention may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
It should also be noted that in the apparatus, devices and methods of the present invention, the components or steps may be broken down and/or re-combined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the invention to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (16)
1. A transformer area voltage management method based on reactive compensation of a photovoltaic grid-connected device is characterized by comprising the following steps:
making a segmented reactive power regulation strategy based on the voltage fluctuation condition of a photovoltaic grid-connected point and the real-time available capacity of a photovoltaic grid-connected device, wherein the segmented reactive power regulation strategy is used for deciding the reactive incremental regulation quantity of the photovoltaic grid-connected device under the condition that the voltage of the grid-connected point fluctuates differently;
based on the reactive power operation range of the photovoltaic grid-connected device, correcting the segmented reactive power regulation strategy; and
and determining a reactive power instruction of the photovoltaic grid-connected device according to the segmental reactive power regulation strategy before correction and the segmental reactive power regulation strategy after correction, and issuing the reactive power instruction to the photovoltaic grid-connected device.
2. The method of claim 1, further comprising:
and establishing a reactive power regulation operation boundary of the photovoltaic grid-connected device according to the real-time available capacity of the photovoltaic grid-connected device and the active power output at different moments, wherein the reactive power regulation operation boundary is used for indicating the incidence relation between the reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments.
3. The method according to claim 2, wherein the reactive power regulation operation boundary of the photovoltaic grid-connected device is as follows:
-QPV,max,t≤QPV,set,t≤QPV,max,t
wherein S isPVIs the photovoltaic grid-connected device capacity, PPV,tIs the active power, Q, of the photovoltaic grid-connected device at time tPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,max,tAnd the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at the time t.
4. The method of claim 1, wherein the segmented reactive regulation strategy is: when the voltage fluctuation of the photovoltaic grid-connected point is in a dead zone of regulation, the reactive increment of the photovoltaic grid-connected device needing to be regulated is equal to zero; and when the voltage fluctuation of the photovoltaic grid-connected point exceeds the dead zone of regulation, linearly regulating the reactive power increment of the photovoltaic grid-connected device to be regulated based on droop control.
5. The method according to claim 4, wherein the calculation formula of the segmented reactive power regulation strategy is as follows:
wherein, is Δ QPV,set,tIs the reactive incremental regulation quantity, U, of the photovoltaic grid-connected device at the moment ttIs the grid-connected point voltage, U, of the photovoltaic grid-connected device at time tnIs the nominal voltage, K, of the distribution system in the distribution areauIs the voltage regulation factor and epsilon is the regulation dead band.
6. The method of claim 5, wherein the modified segmented reactive regulation strategy is:
wherein, delta Q'PV,set,tIs the corrected reactive incremental adjustment quantity, Q, of the photovoltaic grid-connected device at the time tPV,set,t-1And the reactive instruction is the reactive instruction of the photovoltaic grid-connected device at the moment t-1.
7. The method according to claim 6, wherein the reactive command of the photovoltaic grid-connected device is:
QPV,set,t＝QPV,set,t-1+ΔQ'PV,set,t
wherein Q isPV,set,tIs the reactive instruction, Q, of the photovoltaic grid-connected device at time tPV,set,t-1Is a reactive command of the photovoltaic grid-connected device at time t-1, delta Q'PV,set,tAnd the corrected reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t is obtained.
8. The utility model provides a platform district voltage administers device based on grid-connected PV device reactive compensation which characterized in that includes:
the strategy making module is used for making a sectional reactive power regulation and control strategy based on the voltage fluctuation condition of a photovoltaic grid-connected point and the real-time available capacity of the photovoltaic grid-connected device, wherein the sectional reactive power regulation and control strategy is used for deciding the reactive incremental regulation quantity of the photovoltaic grid-connected device under the condition that the voltage of the grid-connected point fluctuates differently;
the strategy correction module is used for correcting the segmented reactive power regulation strategy based on the reactive power operation range of the photovoltaic grid-connected device;
and the reactive instruction determining module is used for determining a reactive instruction of the photovoltaic grid-connected device according to the segmental reactive power regulation strategy before correction and the segmental reactive power regulation strategy after correction, and sending the reactive instruction to the photovoltaic grid-connected device.
9. The apparatus of claim 8, further comprising:
and the reactive power regulation operation boundary construction module is used for constructing a reactive power regulation operation boundary of the photovoltaic grid-connected device according to the real-time available capacity of the photovoltaic grid-connected device and the active power output at different moments, wherein the reactive power regulation operation boundary is used for indicating the incidence relation between the reactive power instruction of the photovoltaic grid-connected device and the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at different moments.
10. The apparatus of claim 9, wherein the reactive power regulation operation boundary construction module is specifically configured to construct the following reactive power regulation operation boundaries:
-QPV,max,t≤QPV,set,t≤QPV,max,t
wherein S isPVIs the photovoltaic grid-connected device capacity, PPV,tIs the active power, Q, of the photovoltaic grid-connected device at time tPV,set,tIs a reactive instruction, Q, of a photovoltaic grid-connected device at the time tPV,max,tAnd the maximum reactive power output allowed by the operation of the photovoltaic grid-connected device at the time t.
11. The apparatus of claim 8, wherein the policy making module is specifically configured to: when the voltage fluctuation of the photovoltaic grid-connected point is in a dead zone of regulation, the reactive increment of the photovoltaic grid-connected device needing to be regulated is equal to zero; and when the voltage fluctuation of the photovoltaic grid-connected point exceeds the dead zone of regulation, linearly regulating the reactive power increment of the photovoltaic grid-connected device to be regulated based on droop control.
12. The device according to claim 11, wherein the strategy formulation module is specifically configured to formulate the following segmental reactive power regulation strategy:
wherein, is Δ QPV,set,tIs the reactive incremental regulation quantity, U, of the photovoltaic grid-connected device at the moment ttIs the grid-connected point voltage, U, of the photovoltaic grid-connected device at time tnIs a platform areaNominal voltage, K, of the distribution systemuIs the voltage regulation factor and epsilon is the regulation dead band.
13. The device according to claim 12, wherein the strategy modification module is specifically configured to modify the following piecewise reactive power regulation strategy:
wherein, delta Q'PV,set,tIs the corrected reactive incremental adjustment quantity, Q, of the photovoltaic grid-connected device at the time tPV,set,t-1And the reactive instruction is the reactive instruction of the photovoltaic grid-connected device at the moment t-1.
14. The apparatus according to claim 13, wherein the reactive instruction determining module is specifically configured to determine the following reactive instructions:
QPV,set,t＝QPV,set,t-1+ΔQ'PV,set,t
wherein Q isPV,set,tIs the reactive instruction, Q, of the photovoltaic grid-connected device at time tPV,set,t-1Is a reactive command of the photovoltaic grid-connected device at time t-1, delta Q'PV,set,tAnd the corrected reactive incremental adjustment quantity of the photovoltaic grid-connected device at the time t is obtained.
15. A computer-readable storage medium, characterized in that the storage medium stores a computer program for performing the method of any of the preceding claims 1-7.
16. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943284.8A CN113872256A (en) | 2021-08-17 | 2021-08-17 | Photovoltaic grid-connected device reactive compensation-based transformer area voltage management method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110943284.8A CN113872256A (en) | 2021-08-17 | 2021-08-17 | Photovoltaic grid-connected device reactive compensation-based transformer area voltage management method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113872256A true CN113872256A (en) | 2021-12-31 |
Family
ID=78990432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110943284.8A Pending CN113872256A (en) | 2021-08-17 | 2021-08-17 | Photovoltaic grid-connected device reactive compensation-based transformer area voltage management method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113872256A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388211A (en) * | 2023-06-07 | 2023-07-04 | 国网上海能源互联网研究院有限公司 | Distributed photovoltaic grid-connected voltage out-of-limit treatment method, device, system and medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281342A (en) * | 2015-10-26 | 2016-01-27 | 海南电网有限责任公司 | Photovoltaic power station reactive distribution method for preferably guaranteeing dynamic reactive margin |
| CN105406488A (en) * | 2015-12-15 | 2016-03-16 | 武汉大学 | Overvoltage inhibition method based on reactive power regulation of photovoltaic inverter |
| CN108539757A (en) * | 2018-05-09 | 2018-09-14 | 北京交通大学 | The reactive power dispatching method of power distribution network light accumulation |
| CN108539752A (en) * | 2018-05-18 | 2018-09-14 | 湖南大学 | The active power distribution network voltage adjusting method that transformer tapping is coordinated with multi-inverter |
| CN110932307A (en) * | 2018-09-19 | 2020-03-27 | 富士电机株式会社 | Detection device, power conditioner, detection method, and storage medium |
-
2021
- 2021-08-17 CN CN202110943284.8A patent/CN113872256A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281342A (en) * | 2015-10-26 | 2016-01-27 | 海南电网有限责任公司 | Photovoltaic power station reactive distribution method for preferably guaranteeing dynamic reactive margin |
| CN105406488A (en) * | 2015-12-15 | 2016-03-16 | 武汉大学 | Overvoltage inhibition method based on reactive power regulation of photovoltaic inverter |
| CN108539757A (en) * | 2018-05-09 | 2018-09-14 | 北京交通大学 | The reactive power dispatching method of power distribution network light accumulation |
| CN108539752A (en) * | 2018-05-18 | 2018-09-14 | 湖南大学 | The active power distribution network voltage adjusting method that transformer tapping is coordinated with multi-inverter |
| CN110932307A (en) * | 2018-09-19 | 2020-03-27 | 富士电机株式会社 | Detection device, power conditioner, detection method, and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 蔡永翔等: "基于光伏逆变器无功调节的低压配电网多模式电压控制", 《电力系统自动化》, vol. 41, no. 13, 10 July 2017 (2017-07-10), pages 133 - 141 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388211A (en) * | 2023-06-07 | 2023-07-04 | 国网上海能源互联网研究院有限公司 | Distributed photovoltaic grid-connected voltage out-of-limit treatment method, device, system and medium |
| CN116388211B (en) * | 2023-06-07 | 2023-08-11 | 国网上海能源互联网研究院有限公司 | Distributed photovoltaic grid-connected voltage out-of-limit treatment method, device, system and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103201702B (en) | To the method and system that evaluation work load manages | |
| US11368024B2 (en) | Controllers for photovoltaic-enabled distribution grid | |
| Razmi et al. | Steady state voltage stability with AVR voltage constraints | |
| WO2024060413A1 (en) | Method and apparatus for constructing adjustable capacity of virtual power plant, electronic device, storage medium, program, and program product | |
| CN113872256A (en) | Photovoltaic grid-connected device reactive compensation-based transformer area voltage management method and device | |
| Chen et al. | An improved coordination method of multi-terminal MMC-HVDC system suitable for wind farm clusters integration | |
| Shi et al. | Energy management strategy for microgrids including heat pump air‐conditioning and hybrid energy storage systems | |
| Bahrami | Large-signal stabilization of DC–DC buck converters considering uncertainty in DC input voltage and ZIP loads | |
| Zhang et al. | Methodology of calculating droop coefficients for stabilising DC voltage in VSC‐MTDC system against disturbances | |
| Gorbachev et al. | MPC-based LFC for interconnected power systems with PVA and ESS under model uncertainty and communication delay | |
| WO2021042974A1 (en) | Method and apparatus for evaluating load response state of thermal power unit | |
| Sekyere et al. | Optimally tuned cascaded FOPI-FOPIDN with improved PSO for load frequency control in interconnected power systems with RES | |
| WO2020195078A1 (en) | Load frequency control device and load frequency control method | |
| CN114614507A (en) | Wind power optimization scheduling method and device and computer readable storage medium | |
| CN113612233A (en) | Voltage stability control method, system, terminal and readable storage medium for active power-reactive power coordination of wind power system | |
| Chang et al. | Improved power allocation strategy of hybrid energy storage system in islanding DC micro‐grid | |
| CN112290584A (en) | Rural wind-solar-diesel-storage micro-grid frequency control method and device and terminal equipment | |
| CN115085290B (en) | Method, device and medium for determining maximum access capacity of new energy | |
| CN111463803A (en) | High-proportion photovoltaic power grid wide area transient stability control method based on atomic search | |
| Afzal Thoker et al. | Dynamic performance improvement of wind-diesel power system through robust sliding mode control of hybrid energy storage system | |
| CN116191574A (en) | Optimization method and device for power supply of wind-solar energy storage system, medium and electronic equipment | |
| WO2024195195A1 (en) | Power line management system and power line management method | |
| CN113128822B (en) | Memory, electric coordination control method, equipment and device for micro-grid | |
| Lyu et al. | Optimal power regulation for wind integration in the balancing market environment | |
| CN117293860B (en) | Frequency safety index evaluation method, system and storage medium of power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |