CN111799849A - Wind power plant reactive voltage sensitivity calculation method and device - Google Patents

Wind power plant reactive voltage sensitivity calculation method and device Download PDF

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CN111799849A
CN111799849A CN202010503429.8A CN202010503429A CN111799849A CN 111799849 A CN111799849 A CN 111799849A CN 202010503429 A CN202010503429 A CN 202010503429A CN 111799849 A CN111799849 A CN 111799849A
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reactive
data
voltage
grid
connected point
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CN111799849B (en
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宋鹏
崔阳
郭子明
杨伟新
阎博
刘斌
王伟国
魏永朝
王正宇
王一妹
刘占彪
孙雅旻
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Business Intelligence Of Oriental Nations Corp ltd
State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
State Grid Jibei Electric Power Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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Business Intelligence Of Oriental Nations Corp ltd
State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
State Grid Jibei Electric Power Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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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
    • H02J3/38—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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02J2300/28—The renewable source being wind energy
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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Abstract

The invention provides a method and a device for calculating the reactive voltage sensitivity of a wind power plant, wherein the method for calculating the reactive voltage sensitivity of the wind power plant comprises the following steps: acquiring grid-connected point voltage and reactive data of a wind power plant; merging the grid-connected point voltage and the reactive data; and calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. By adopting the method and the device for calculating the reactive voltage sensitivity of the wind power plant, the determined reactive voltage sensitivity is more scientific and reasonable, and the voltage regulation qualification rate of the wind power plant is improved.

Description

Wind power plant reactive voltage sensitivity calculation method and device
Technical Field
The invention relates to the field of power industry, in particular to a method and a device for calculating reactive voltage sensitivity of a wind power plant, belonging to the technical field of reactive compensation of transformer substations.
Background
In the prior art, in order to solve the problem of voltage stability of a large-scale wind power access area power grid, an Automatic Voltage Control (AVC) system is generally configured for a wind power plant and used for automatically adjusting the voltage of a grid-connected point of the wind power plant, so that the overall voltage of the system is kept stable.
An important parameter, namely reactive voltage sensitivity, exists in an AVC system of a wind power plant. The parameter represents the sensitivity degree of the wind power plant grid-connected point voltage to the reactive power, namely the voltage quantity of the reactive power change regulated by the wind power plant AVC system. The reactive voltage sensitivity value is closely related to the qualification rate of the voltage regulation of the wind power plant. At present, the parameter is mainly determined by field debugging of AVC system manufacturer personnel, and cannot represent the long-period running condition of the wind power plant.
Disclosure of Invention
The reactive voltage sensitivity determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant.
In order to achieve the purpose, the wind power plant reactive voltage sensitivity calculation method comprises the following steps:
acquiring grid-connected point voltage and reactive data of a wind power plant;
merging the grid-connected point voltage and the reactive data;
and calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
In one embodiment, the method for calculating the reactive voltage sensitivity of the wind farm further includes:
and eliminating data with inconsistent monotonicity change in the grid-connected point voltage and the reactive data of the wind power plant.
In an embodiment, the merging the grid-connected point voltage and the reactive data includes:
and merging the voltage and the reactive data of the grid-connected point according to the sampling time and the positive and negative attributes of the voltage and the reactive data of the grid-connected point.
In an embodiment, before the calculating the wind farm reactive voltage sensitivity according to the merged grid-connected point voltage and reactive data, the method further includes:
and eliminating respective fluctuation data in the combined grid-connected point voltage and reactive data according to the box type graph.
In a second aspect, the present invention provides a wind farm reactive voltage sensitivity calculation apparatus, comprising:
the data acquisition unit is used for acquiring the grid-connected point voltage and the reactive data of the wind power plant;
the data merging unit is used for merging the grid-connected point voltage and the reactive data;
and the sensitivity calculation unit is used for calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
In one embodiment, the wind farm reactive voltage sensitivity calculation device further comprises:
and the monotonicity data removing unit is used for removing the data with inconsistent monotonicity change in the grid-connected point voltage and the reactive data of the wind power plant.
In an embodiment, the data merging unit is specifically configured to merge the grid-connected point voltage and the reactive data according to respective sampling time and positive and negative attributes of the grid-connected point voltage and the reactive data.
In one embodiment, the wind farm reactive voltage sensitivity calculation device further comprises:
and the fluctuating data eliminating unit is used for eliminating respective fluctuating data in the combined grid-connected point voltage and reactive data according to the box type graph.
In a third aspect, the present invention provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor implements the steps of the wind farm reactive voltage sensitivity calculation method when executing the program.
In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the wind farm reactive voltage sensitivity calculation method.
As can be seen from the above description, according to the method and the device for calculating the reactive voltage sensitivity of the wind farm provided by the embodiment of the invention, the grid-connected point voltage and the reactive data of the wind farm are firstly obtained, and then the grid-connected point voltage and the reactive data are combined; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. By adopting the method and the device for calculating the reactive voltage sensitivity of the wind power plant based on the long-term operation data, the determined reactive voltage sensitivity is more scientific and reasonable, and the improvement of the voltage regulation qualification rate of the wind power plant is facilitated.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic flow chart of a method for calculating reactive voltage sensitivity of a wind farm provided in an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram II of a method for calculating reactive voltage sensitivity of a wind farm provided in the embodiment of the present invention;
FIG. 3 is a flowchart illustrating a step 200 of a wind farm reactive voltage sensitivity calculation method according to an embodiment of the present invention;
FIG. 4 is a third schematic flow chart of a method for calculating reactive voltage sensitivity of a wind farm provided in the embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method for calculating the reactive voltage sensitivity of a wind farm according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a primary voltage regulation process in an embodiment of the present invention;
FIG. 7 is a first schematic structural diagram of a reactive voltage sensitivity calculation device of a wind farm in the embodiment of the invention;
FIG. 8 is a schematic structural diagram II of a reactive voltage sensitivity calculation device of a wind farm in the embodiment of the invention;
FIG. 9 is a schematic structural diagram III of a reactive voltage sensitivity calculation device of a wind farm in the embodiment of the invention;
fig. 10 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
The embodiment of the invention also provides a specific implementation manner of the wind power plant reactive voltage sensitivity calculation method, and referring to fig. 1, the method specifically includes the following steps:
step 100: and acquiring the voltage and the reactive data of the grid-connected point of the wind power plant.
Specifically, wind farm operational data related to reactive voltage sensitivity, including grid-connected point voltage and reactive data, is extracted. For example, the voltage operation data time series are U1, U2, U3, … …, and the reactive operation data time series are Q1, Q2, Q3, … ….
Step 200: and merging the grid-connected point voltage and the reactive data.
In the process of primary voltage regulation of the wind power plant, the wind power plant is not regulated in place at one moment, and a complete regulation process comprises operation data at a plurality of adjacent moments.
Step 300: and calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
It will be appreciated that the reactive voltage sensitivity is the ratio of the amount of reactive change to the amount of voltage change, i.e. how much Mvar reactive power needs to be adjusted when the voltage changes by 1 kV. Suppose the voltage of a grid-connected point of the wind power plant is U, and the reactive power of the grid-connected point is Q. The reactive voltage sensitivity Rmn determined by the two moments m and n is calculated as follows:
Figure BDA0002525682210000041
as can be seen from the above description, according to the wind farm reactive voltage sensitivity calculation method provided by the embodiment of the present invention, the grid-connected point voltage and the reactive data of the wind farm are first obtained, and then the grid-connected point voltage and the reactive data are merged; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. The reactive voltage sensitivity coefficient determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant. By adopting the method for calculating the reactive voltage sensitivity of the wind power plant based on the long-term operation data, the determined reactive voltage sensitivity is more scientific and reasonable, and the method is favorable for improving the voltage regulation qualification rate of the wind power plant.
In an embodiment, referring to fig. 2, the method for calculating the reactive voltage sensitivity of the wind farm further includes:
step 400: and eliminating data with inconsistent monotonicity change in the grid-connected point voltage and the reactive data of the wind power plant.
Specifically, the voltage change amount and the reactive change amount between two adjacent time points are calculated, and the change amount calculation formula from time point t to time point t +1 is as follows:
ΔUt＝Ut+1-Ut
ΔQt＝Qt+1-Qt
when the wind power plant adjusts the voltage, the voltage changes are caused by reactive changes, and the voltage changes and the reactive changes have the same trend. Therefore, when the reactive variation is positive, the voltage variation is also positive; when the reactive variation is negative, the voltage variation is also negative, i.e., the monotonicity of the two is consistent. The data expression satisfying the above conditions is as follows:
Figure BDA0002525682210000042
and eliminating data which do not meet the expression, namely, the monotonicity inconsistent change.
In one embodiment, referring to fig. 3, step 200 specifically includes:
step 201: and merging the voltage and the reactive data of the grid-connected point according to the sampling time and the positive and negative attributes of the voltage and the reactive data of the grid-connected point.
It can be understood that, during one voltage regulation of the wind farm, the regulation is not in place at one time, and a complete regulation process contains operating data at a plurality of adjacent times.
Specifically, assume that the reactive power change amounts at time t and time t +1 are Δ Q, respectivelytAnd Δ Qt+1I.e. by
ΔQt＝Qt+1-Qt
ΔQt+1＝Qt+2-Qt+1
And if the two are both positive or both negative, merging the data at the two moments. Namely satisfy
Figure BDA0002525682210000051
And after combination, only the data at the head end and the tail end are reserved for subsequent analysis and calculation, namely voltage and reactive variable quantity data between the time t and the time t + 2. The data volume is reduced through the step, and the operation efficiency is improved. Only the data of the increase or decrease is retained here, because the reactive change should be rising or falling all the time during a regulation. If rising and falling inflection points occur, it is indicated that the data of the two adjacent time instants belong to two different adjustment processes.
In an embodiment, referring to fig. 4, in the method for calculating reactive voltage sensitivity of a wind farm, before step 300, the method further includes:
step 500: and eliminating respective fluctuation data in the combined grid-connected point voltage and reactive data according to the box type graph.
In the normal operation process of the wind power plant, small fluctuation exists in voltage and reactive data, and the fluctuation data is high in ratio. In order to avoid the influence of the data on the final result, effective data are screened out by adopting a box diagram, and micro fluctuation data are screened out.
As can be seen from the above description, according to the wind farm reactive voltage sensitivity calculation method provided by the embodiment of the present invention, the grid-connected point voltage and the reactive data of the wind farm are first obtained, and then the grid-connected point voltage and the reactive data are merged; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. The reactive voltage sensitivity coefficient determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant. By adopting the method for calculating the reactive voltage sensitivity of the wind power plant based on the long-term operation data, the determined reactive voltage sensitivity is more scientific and reasonable, and the method is favorable for improving the voltage regulation qualification rate of the wind power plant.
Specifically, the embodiment of the invention has the following beneficial effects: the method for calculating the reactive voltage sensitivity of the wind power plant provided by the embodiment of the invention overcomes the defect that in the prior art, the parameter can only be determined by field debugging of AVC system manufacturer personnel, and the test method cannot represent the long-period running condition of the wind power plant. Thereby being more beneficial to improving the voltage regulation qualification rate of the wind power plant.
To further explain the scheme, a specific application example of the wind farm reactive voltage sensitivity calculation method is provided by taking a certain wind farm as an example, and the specific application example specifically includes the following contents, and refer to fig. 5.
Suppose the voltage of a grid-connected point of the wind power plant is U, and the reactive power of the grid-connected point is Q. Reactive voltage sensitivity R determined by m and n timemnThe basic calculation formula is as follows:
Figure BDA0002525682210000061
the reactive voltage sensitivity is the ratio of the reactive variation and the voltage variation, namely how much Mvar is needed to be adjusted when the voltage varies by 1 kV.
S1: voltage and reactive time sequence operation data are extracted.
Extracting wind farm operational data related to reactive voltage sensitivity, including grid-connected point voltage and reactive data. Assume that the voltage operating data time sequence is U1、U2、U3… …, the time series of idle running data being Q1、Q2、Q3、……。
S2: and removing monotonicity inconsistent change data.
Specifically, the voltage change amount and the reactive change amount between two adjacent time points are calculated, and the change amount calculation formula from time point t to time point t +1 is as follows:
ΔUt＝Ut+1-Ut
ΔQt＝Qt+1-Qt
when the wind power plant adjusts the voltage, the voltage changes are caused by reactive changes, and the voltage changes and the reactive changes have the same trend. Therefore, when the reactive variation is positive, the voltage variation is also positive; when the reactive variation is negative, the voltage variation is also negative, i.e., the monotonicity of the two is consistent. The data expression satisfying the above conditions is as follows:
Figure BDA0002525682210000062
and eliminating data which do not meet the expression, namely, the monotonicity inconsistent change.
S3: and merging the adjacent data.
In the process of primary voltage regulation of the wind power plant, the wind power plant is not regulated in place at one moment, and a complete regulation process comprises operation data at a plurality of adjacent moments. As shown in fig. 6, t1～t4Representing a voltage regulation process. Therefore, the data screened in step 2) needs to be merged. Suppose that the reactive power change amounts at time t and time t +1 are respectively Δ QtAnd Δ Qt+1I.e. by
ΔQt＝Qt+1-Qt
ΔQt+1＝Qt+2-Qt+1
And if the two are both positive or both negative, merging the data at the two moments. Namely satisfy
Figure BDA0002525682210000063
And after combination, only the data at the head end and the tail end are reserved for subsequent analysis and calculation, namely voltage and reactive variable quantity data between the time t and the time t + 2. The data volume is reduced through the step, and the operation efficiency is improved. Only the data of the increase or decrease is retained here, because the reactive change should be rising or falling all the time during a regulation. If rising and falling inflection points occur, it is indicated that the data of the two adjacent time instants belong to two different adjustment processes.
S4: and screening effective data by using a box diagram method.
In the normal operation process of the wind power plant, small fluctuation exists in voltage and reactive data, and the fluctuation data is high in ratio. In order to avoid the influence of the data on the final result, effective data are screened out by adopting a box diagram, and micro fluctuation data are screened out. Specifically, the method comprises the following steps:
a) and (4) respectively arranging the voltage and reactive variable quantity data processed in the step (S4) from small to large, and assuming that the total quantity of the data is n.
b) Is located at
Figure BDA0002525682210000071
The number of positions is the lower quantile N1，
Figure BDA0002525682210000072
The number of positions being the upper quantile N3Four of a spacing of N3-N1。
c) The data N satisfying the following expression is valid data.
N1-3(N3-N1)＜N＜N1-1.5(N3-N1) Or N3+1.5(N3-N1)＜N＜N3+3(N3-N1)
The rest data are small fluctuation and abnormal data.
S5: and calculating the comprehensive sensitivity.
And calculating the ratio of the reactive power and the voltage variation in the same time interval as the reactive voltage sensitivity R. Integrating a series of R values into comprehensive sensitivity by adopting a weighted average algorithm, and comprising the following steps of:
a) setting the data interval as M (the value of M is proportional to the data quantity), and determining the distance R by the maximum value and the minimum value of RMIs composed of
Figure BDA0002525682210000073
b) The R data is partitioned into Rmin～Rmin+RM、Rmin+RM～Rmin+2RM、……、Rmax-2RM～Rmax-RM、Rmax-RM～Rmax. And (5) corresponding the R value to each partition and calculating the average value of each interval.
c) And summing the average values of the intervals R, and dividing the sum by M to obtain the comprehensive reactive voltage sensitivity.
As can be seen from the above description, according to the wind farm reactive voltage sensitivity calculation method provided by the embodiment of the present invention, the grid-connected point voltage and the reactive data of the wind farm are first obtained, and then the grid-connected point voltage and the reactive data are merged; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. The reactive voltage sensitivity coefficient determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant. By adopting the method for calculating the reactive voltage sensitivity of the wind power plant based on the long-term operation data, the determined reactive voltage sensitivity is more scientific and reasonable, and the method is favorable for improving the voltage regulation qualification rate of the wind power plant.
Specifically, the embodiment of the invention has the following beneficial effects: the method for calculating the reactive voltage sensitivity of the wind power plant provided by the embodiment of the invention overcomes the defect that in the prior art, the parameter can only be determined by field debugging of AVC system manufacturer personnel, and the test method cannot represent the long-period running condition of the wind power plant. Thereby being more beneficial to improving the voltage regulation qualification rate of the wind power plant.
Based on the same inventive concept, the embodiment of the present application further provides a wind farm reactive voltage sensitivity calculation device, which can be used for implementing the method described in the above embodiment, such as the following embodiments. Because the principle of solving the problem of the wind farm reactive voltage sensitivity calculation device is similar to that of the wind farm reactive voltage sensitivity calculation method, the implementation of the wind farm reactive voltage sensitivity calculation device can refer to the implementation of the wind farm reactive voltage sensitivity calculation method, and repeated parts are not repeated. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
The embodiment of the invention provides a specific implementation manner of a wind farm reactive voltage sensitivity calculation device capable of realizing a wind farm reactive voltage sensitivity calculation method, and referring to fig. 7, the wind farm reactive voltage sensitivity calculation device specifically comprises the following contents:
the data acquisition unit 10 is used for acquiring grid-connected point voltage and reactive data of the wind power plant;
a data merging unit 20, configured to merge the grid-connected point voltage and the reactive data;
and the sensitivity calculation unit 30 is configured to calculate the reactive voltage sensitivity of the wind farm according to the merged grid-connected point voltage and reactive data.
In one embodiment, referring to fig. 8, the wind farm reactive voltage sensitivity calculation device further includes:
and the monotonicity data eliminating unit 40 is used for eliminating data with inconsistent monotonicity change in the grid-connected point voltage and the reactive data of the wind power plant.
In an embodiment, the data merging unit is specifically configured to merge the grid-connected point voltage and the reactive data according to respective sampling time and positive and negative attributes of the grid-connected point voltage and the reactive data.
In one embodiment, referring to fig. 9, the wind farm reactive voltage sensitivity calculation device further includes:
and the fluctuating data eliminating unit 50 is used for eliminating respective fluctuating data in the combined grid-connected point voltage and reactive data according to the box type graph.
As can be seen from the above description, the wind farm reactive voltage sensitivity calculation device provided in the embodiment of the present invention first obtains the grid-connected point voltage and the reactive data of the wind farm, and then merges the grid-connected point voltage and the reactive data; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. The reactive voltage sensitivity coefficient determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant. By adopting the wind power plant reactive voltage sensitivity calculation device based on the long-term operation data in the embodiment, the determined reactive voltage sensitivity is more scientific and reasonable, and the wind power plant voltage regulation qualification rate is favorably improved.
Specifically, the embodiment of the invention has the following beneficial effects: the wind power plant reactive voltage sensitivity calculation device provided by the embodiment of the invention overcomes the defect that in the prior art, the parameter can only be determined by field debugging of AVC system manufacturer personnel, and the test method cannot represent the long-period running condition of the wind power plant. Thereby being more beneficial to improving the voltage regulation qualification rate of the wind power plant.
The embodiment of the present application further provides a specific implementation manner of an electronic device capable of implementing all steps in the method for calculating the reactive voltage sensitivity of the wind farm in the foregoing embodiment, and referring to fig. 10, the electronic device specifically includes the following contents:
a processor (processor)1201, a memory (memory)1202, a communication interface 1203, and a bus 1204;
the processor 1201, the memory 1202 and the communication interface 1203 complete communication with each other through the bus 1204; the communication interface 1203 is configured to implement information transmission between related devices, such as a server-side device, a power measurement device, and a client device.
The processor 1201 is configured to call the computer program in the memory 1202, and the processor executes the computer program to implement all the steps in the wind farm reactive voltage sensitivity calculation method in the foregoing embodiment, for example, the processor executes the computer program to implement the following steps:
step 100: and acquiring the voltage and the reactive data of the grid-connected point of the wind power plant.
Step 200: and merging the grid-connected point voltage and the reactive data.
Step 300: and calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
As can be seen from the above description, in the electronic device in the embodiment of the present application, the grid-connected point voltage and the reactive data of the wind farm are first obtained, and then the grid-connected point voltage and the reactive data are merged; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. The reactive voltage sensitivity coefficient determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant. By adopting the electronic equipment in the embodiment of the application, the determined reactive voltage sensitivity is more scientific and reasonable, and the improvement of the voltage regulation qualified rate of the wind power plant is facilitated.
Embodiments of the present application further provide a computer-readable storage medium capable of implementing all steps in the wind farm reactive voltage sensitivity calculation method in the foregoing embodiments, where the computer-readable storage medium stores thereon a computer program, and the computer program, when executed by a processor, implements all steps of the wind farm reactive voltage sensitivity calculation method in the foregoing embodiments, for example, when the processor executes the computer program, the processor implements the following steps:
step 100: and acquiring the voltage and the reactive data of the grid-connected point of the wind power plant.
Step 200: and merging the grid-connected point voltage and the reactive data.
Step 300: and calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
As can be seen from the above description, in the computer-readable storage medium in the embodiment of the present application, the grid-connected point voltage and the reactive data of the wind farm are first obtained, and then the grid-connected point voltage and the reactive data are merged; and finally, calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data. The reactive voltage sensitivity coefficient determined according to the method is more scientific and reasonable, and is favorable for improving the voltage regulation qualification rate of the wind power plant. By adopting the electronic equipment in the embodiment of the application, the determined reactive voltage sensitivity is more scientific and reasonable, and the improvement of the voltage regulation qualified rate of the wind power plant is facilitated.
To sum up, the computer-readable storage medium provided by the embodiment of the present invention can support a service provider to perform adaptive offline and online of services according to the availability of its own software and hardware resources, thereby implementing the self-isolation capability of the service provider and ensuring the success rate of the service provider in responding to a service request.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Although the present application provides method steps as in an embodiment or a flowchart, more or fewer steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or client product executes, it may execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A wind power plant reactive voltage sensitivity calculation method is characterized by comprising the following steps:
acquiring grid-connected point voltage and reactive data of a wind power plant;
merging the grid-connected point voltage and the reactive data;
and calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
2. The wind farm reactive voltage sensitivity calculation method of claim 1, further comprising:
and eliminating data with inconsistent monotonicity change in the grid-connected point voltage and the reactive data of the wind power plant.
3. The wind farm reactive voltage sensitivity calculation method of claim 1, wherein the merging the grid-tie point voltage and reactive data comprises:
and merging the voltage and the reactive data of the grid-connected point according to the sampling time and the positive and negative attributes of the voltage and the reactive data of the grid-connected point.
4. The wind farm reactive voltage sensitivity calculation method according to claim 1, further comprising, before the calculating the wind farm reactive voltage sensitivity from the merged grid-connected point voltage and reactive data:
and eliminating respective fluctuation data in the combined grid-connected point voltage and reactive data according to the box type graph.
5. A wind farm reactive voltage sensitivity calculation apparatus, comprising:
the data acquisition unit is used for acquiring the grid-connected point voltage and the reactive data of the wind power plant;
the data merging unit is used for merging the grid-connected point voltage and the reactive data;
and the sensitivity calculation unit is used for calculating the reactive voltage sensitivity of the wind power plant according to the combined grid-connected point voltage and the reactive data.
6. The wind farm reactive voltage sensitivity calculation device of claim 5, further comprising:
and the monotonicity data removing unit is used for removing the data with inconsistent monotonicity change in the grid-connected point voltage and the reactive data of the wind power plant.
7. The wind farm reactive voltage sensitivity calculation device according to claim 5, wherein the data merging unit is specifically configured to merge the grid-connected point voltage and the reactive data according to respective sampling times and positive and negative attributes of the grid-connected point voltage and the reactive data.
8. The wind farm reactive voltage sensitivity calculation device of claim 5, further comprising:
and the fluctuating data eliminating unit is used for eliminating respective fluctuating data in the combined grid-connected point voltage and reactive data according to the box type graph.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, carries out the steps of the wind farm reactive voltage sensitivity calculation method of any one of claims 1 to 4.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the wind farm reactive voltage sensitivity calculation method according to any one of claims 1 to 4.
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