CN109586340A - Low wind speed power flow direction verification method, device and the storage medium of wind power system - Google Patents
Low wind speed power flow direction verification method, device and the storage medium of wind power system Download PDFInfo
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- 238000012795 verification Methods 0.000 title claims abstract description 29
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- 230000006870 function Effects 0.000 description 10
- 230000006872 improvement Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 6
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Classifications
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- H02J3/386—
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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
- H02J3/40—Synchronising a generator for connection to a network or to another generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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 relates to low wind speed power flow direction verification method, device and the storage mediums of a kind of wind power system.The described method includes: acquiring the stator power, rotor power and online power of wind power system at preset power collecting point；It surfs the Internet according to the collected stator power meter power, judges that the wind power system is in metasynchronism state, synchronous regime or supersynchronous state；And whether the calculation formula for power of surfing the Internet under verifying metasynchronism state and supersynchronous state is correct.Low wind speed power flow direction verification method, device and the storage medium of wind power system provided by the invention can be able to verify that online power, the relationship between stator power under the operating status of wind power system, thus for understanding wind power system under operation watt level, flow to characteristic and provide effective mode.
Description
Technical field
The present invention relates to Wind turbines technical fields, verify more particularly to a kind of low wind speed power flow direction of wind power system
Method, apparatus and storage medium.
Background technique
Double-fed asynchronous wind power system is mainly by wind energy conversion system, step-up gear, the winding type asynchronous generator of double-fed, Bidirectional variable-flow
The composition such as device and control unit.Double-fed generator stator winding connects common frequency power network, and rotor windings connect cross-straight-intersection bidirectional converter,
The current transformer can realize that the adjustings such as the frequency to rotor windings, phase, amplitude and phase sequence control.When motor speed changes
When, adjusting the frequency of rotor current, that generator unit stator output frequency can be made to keep constant is constant, i.e., it is consistent with mains frequency,
Realize the variable speed constant frequency control of wind-driven generator.
Double-fed asynchronous wind power system needs to consider there are mainly three types of state in operation: metasynchronism state, synchronous regime and
Supersynchronous state.In metasynchronism state, synchronous regime, the operating status generator unit stator power of supersynchronous state, rotor power,
Different variations can occur for the size of online power, flow direction.Different wind power generating sets are understood by practical study in this respect
Characteristic may consequently contribute to the torque-speed curve for optimizing the characteristic of different wind-force wind turbines, improve the generated energy of blower, available
Rate.
For double-fed asynchronous wind power system, there is following formula under metasynchronism state and supersynchronous state:
Wherein, PgFor power of surfing the Internet, PsFor stator power, PrFor rotor power.For above-mentioned formula, in the prior art simultaneously
Effective verification mode is not provided.
Summary of the invention
The technical problem to be solved in the present invention is to provide low wind speed power flow direction verification method, the devices of a kind of wind power system
And storage medium, so that in the relationship being able to verify that under the operating status of wind power system between online power, stator power, thus
For understand wind power system under operation watt level, flow to characteristic and provide effective mode.
In order to solve the above technical problems, the present invention provides a kind of low wind speed power flow direction verification method of wind power system,
The described method includes: acquiring the stator power, rotor power and online power of wind power system at preset power collecting point；
According to the collected stator power and the online power, judge that the wind power system is in metasynchronism state, synchronous shape
State or supersynchronous state；And whether the calculation formula for power of surfing the Internet under verifying metasynchronism state and supersynchronous state is correct.
As an improvement of the present invention, the calculation formula of the online power is as follows:
Wherein, PsFor stator power, PrFor rotor power, PgFor power of surfing the Internet.
As an improvement of the present invention, further includes: real-time monitoring blower wind speed；And it saves and is collected under different wind speed
Stator power, rotor power and online power.
As an improvement of the present invention, further includes: according to the blower wind speed of preservation, stator power, rotor power and on
Net power draws power flow direction figure.
As an improvement of the present invention, at preset power collecting point, stator power, the rotor of wind power system are acquired
Power and online power, comprising: at preset power collecting point, acquire stator voltage, stator current, rotor current, online
Electric current and online voltage；And calculate separately stator power, rotor power and online power.
As an improvement of the present invention, stator power, rotor power and online power are calculated separately, comprising: according to such as
Lower formula calculates stator power:
Wherein, PsFor stator power, VsFor stator voltage, IsFor stator current,For power-factor angle.
As an improvement of the present invention, stator power, rotor power and online power are calculated separately, comprising: according to such as
Lower formula calculates rotor power:
Wherein, PrFor rotor power, IrFor rotor current, ReqFor rotor equivalent resistance.
As an improvement of the present invention, stator power, rotor power and online power are calculated separately, comprising: according to such as
Lower formula calculates online power:
Pg=VgIg
Wherein, PgFor power of surfing the Internet, VgFor voltage of surfing the Internet, IgFor electric current of surfing the Internet.
In addition, the present invention also provides a kind of low wind speed power flow directions of wind power system to verify device, described device includes:
One or more processors；Storage device, for storing one or more programs, when one or more of programs are by described one
A or multiple processors execute, so that one or more of processors realize the low wind speed function of wind power system as previously described
Rate flows to verification method.
In addition, it is stored thereon with computer program the present invention also provides a kind of computer readable storage medium, the program
It is performed the low wind speed power flow direction verification method for realizing wind power system as previously described.
By adopting such a design, the present invention has at least the following advantages:
So that in the calculated relationship being able to verify that under the operating status of wind power system between online power, stator power, from
And for understand wind power system under operation watt level, flow to characteristic and provide effective mode.
Detailed description of the invention
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is the flow chart of the low wind speed power flow direction verification method of wind power system under one embodiment of the present invention；
Fig. 2 is the flow chart of the low wind speed power flow direction verification method of wind power system under another embodiment of the present invention；
Fig. 3 is the power flow direction figure drawn using the low wind speed power flow direction verification method of wind power system of the present invention；
Fig. 4 is the structure chart of the low wind speed power flow direction verifying device of wind power system of the present invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 1 is the flow chart of the low wind speed power flow direction verification method of wind power system in one embodiment of the present invention.
The low wind speed power flow direction verification method of the wind power system includes the following steps:
S11 acquires the stator power, rotor power and online power of wind power system at preset power collecting point.
In the present embodiment, several power collecting points are provided in wind power system.In the power collecting of these settings
At point, rotor power, the stator of entire wind power system can be got by acquiring the electrical parameters such as corresponding electric current, voltage
Power and online power.
Specifically, the electrical parameter acquired at these power collecting points includes: stator voltage, stator current, rotor electricity
Stream, online electric current and online voltage.It should be strongly noted that is usually exported due to wind power system is three-phase alternating current, on
The each electrical parameter stated only refers to the electrical parameter of a phase alternating current in three-phase alternating current.For example, stator voltage refers to three
The mutually voltage parameter of the phase in exchange stator voltage.
Corresponding operation is carried out by the above-mentioned electrical parameter got, the stator power of wind power system can be obtained, turned
Sub- power and online power.
S12 judges that the wind power system is in metasynchronism according to the collected stator power and the online power
State, synchronous regime or supersynchronous state.
Specifically, the size between the stator power got by comparing and online power, judges that wind power system is current
Operating status.If stator power is less than online power, wind power system is currently at metasynchronism state；If stator power
Equal to online power, then wind power system is in synchronous regime；If stator power is greater than online power, wind power system is in super
Synchronous regime.
Whether S13, the calculation formula for verifying power of surfing the Internet under metasynchronism state and supersynchronous state are correct.
The calculation formula of the above-mentioned online power being verified is as follows:
Wherein, PsFor stator power, PrFor rotor power, PgFor power of surfing the Internet；|Ps| it is the absolute value of stator power, | Pr|
For the absolute value of rotor power, | Pg| for the absolute value of online power.
The power parameter at each power collecting point is being obtained, and is judging that system is worked as according to each power parameter got
After the operating status at preceding place, real-time verification is carried out to above-mentioned formula with the power parameter got.
The operation of the low wind speed power flow direction verification method of the wind power system provided through the invention, can collect in real time
Stator power, rotor power and the online power of wind power system, current operating status are judged according to above-mentioned power parameter, in turn
The calculation formula for power of surfing the Internet under supersynchronous state and metasynchronism state is verified, to understand wind power system in operation shape
Watt level under state flows to characteristic and provides effective mode.
Fig. 2 is the process of the low wind speed power flow direction verification method of wind power system in another embodiment of the present invention
Figure.The low wind speed power flow direction verification method of the wind power system includes the following steps:
S21, at preset power collecting point, acquisition stator voltage, stator current, rotor current, online electric current and on
Net voltage.
In the present embodiment, actual measurement has been carried out in Quanjiao, Anhui Province mountain wind electric field blower using this method, verified.
Tested blower model UP2000-115, unit parameter are as shown in table 1:
Table 1
In actual electrical parameter collection process, electric current loop is extracted at 3 × 5 × 240mm2 cable respectively, according to
Electric current loop is locked on cable by the every phase of three-phase electricity one by one, must not be omitted.Once omitting, current three-phase imbalance will cause.
When executing above-mentioned sampling, the sampling sensor of use can have current mode sampling sensor, can also there is voltage-type
Sampling sensor.The concrete type of sensor can have: thermocouple and resistance thermometer.
Sample rate when sampling can have: 100KHz, 200KHz, 500KHz, 1MHz, 3MHz, 10MHz, 20MHz,
50MHz.Resolution ratio when sampling can have: 12,14,16,22,24.
S22 calculates separately stator power, rotor power and online power.
It, can be with due to having measured stator voltage, stator current, rotor current, online electric current and online voltage respectively
Stator power, rotor power and online power is calculated according to the above-mentioned electrical parameter that measurement obtains.
Stator power is calculated according to the following formula:
Wherein, PsFor stator power, VsFor stator voltage, IsFor stator current,For power-factor angle.
Rotor power is calculated according to the following formula:
Wherein, PrFor rotor power, IrFor rotor current, ReqFor rotor equivalent resistance.
Online power is calculated according to the following formula:
Pg=VgIg
Wherein, PgFor power of surfing the Internet, VgFor voltage of surfing the Internet, IgFor electric current of surfing the Internet.
After the operation for completing above-mentioned S21 and S22, just complete at power collecting point to stator power, rotor function
The acquisition tasks of rate and power of surfing the Internet.
S23, real-time monitoring blower wind speed.
In order to analyze the operating status of wind power system, power situation under different wind friction velocities, provided in this embodiment
Real-time measurement is carried out to the wind speed of blower application environment in the operational process of method.
S24 saves collected stator power under different wind speed, rotor power and online power.
As an example, table 2 shows the wind speed measured in actual application environment, stator power and online function
Corresponding relationship between rate.
Table 2
S25 draws power flow direction figure according to the blower wind speed of preservation, stator power, rotor power and online power.
Fig. 3 shows an example for drawing obtained power flow direction figure.Referring to Fig. 3, shown in power flow direction figure
At different wind speeds, the variation tendency of the sum of stator power and stator power and rotor power.It can be seen that with wind speed
Rising, stator power and the sum of stator power and rotor power present the trend of rising, and stator power with turn
The ascendant trend of the sum of sub- power becomes apparent compared to independent stator power, ascendant trend.
S26 judges that the wind power system is in metasynchronism according to the collected stator power and the online power
State, synchronous regime or supersynchronous state.
Specifically, in the present embodiment, by comparing the size of stator power and online power, judging that wind power system is current
Locating loading.
More specifically, in the present embodiment, if stator power is less than online power, illustrate that wind power system is currently located
In metasynchronism state；If stator power is equal to online power, illustrate that wind power system is currently at synchronous regime；If stator
Power is greater than online power, then illustrates that wind power system is currently at supersynchronous state.
Whether S27, the calculation formula for verifying power of surfing the Internet under metasynchronism state and supersynchronous state are correct.
The formula being verified is as follows:
Wherein, PsFor stator power, PrFor rotor power, PgFor power of surfing the Internet.
Specifically, in the present embodiment, the stator function under different conditions is obtained by actual measurement and theoretical calculation respectively
Rate and online power, and the stator power obtained by comparing two ways and power value of surfing the Internet, obtain to above-mentioned theory public affairs
The verification result of formula.
Here is the value of stator power and online power under the different conditions that two ways acquisition is respectively adopted:
(1) according to theoretical calculation power under metasynchronism mode:
PS1=420kW；Pg1=300kW；
(2) actual measurement obtains power under metasynchronism mode:
PcS1=400kW；Pcg1=270kW；
(3) in synchronous mode according to theoretical calculation power:
PS2=790kW；Pg2=801kW；
(4) actual measurement obtains power in synchronous mode:
PcS2=700kW；Pcg2=700kW；
(5) according to theoretical calculation power under supersynchronous mode:
PS3=1670kW；Pg3=2001kW；
(6) actual measurement obtains power under supersynchronous mode:
PcS3=180kW；Pcg3=2019kW.
By the theoretical comparison with actual measured value, the accuracy of measurement method is demonstrated.
Fig. 4 is the structure chart of the low wind speed power flow direction verifying device of wind power system of the present invention.Referring to fig. 4, wind power system
Low wind speed power flow direction verifying device include: central processing unit (CPU) 401, can be according to being stored in read-only memory
(ROM) program in executes various from the program that storage section 408 is loaded into random access storage device (RAM) 403
Movement and processing appropriate.In RAM 403, it is also stored with various programs and data needed for system operatio.CPU 401,ROM
402 and RAM 403 is connected with each other by bus 404.Input/output (I/O) interface 405 is also connected to bus 404.
I/O interface 405 is connected to lower component: the importation 406 including keyboard, mouse etc.；It is penetrated including such as cathode
The output par, c 407 of spool (CRT), liquid crystal display (LCD) etc. and loudspeaker etc.；Storage section 408 including hard disk etc.；
And the communications portion 409 of the network interface card including LAN card, modem etc..Communications portion 409 via such as because
The network of spy's net executes communication process.Driver 410 is also connected to I/O interface 405 as needed.Detachable media 411, such as
Disk, CD, magneto-optic disk, semiconductor memory etc. are mounted on as needed on driver 410, in order to read from thereon
Computer program be mounted into storage section 408 as needed.
Particularly, according to embodiments of the present invention, it is soft to may be implemented as computer for the process above with reference to flow chart description
Part program.For example, the embodiment of the present invention includes a kind of computer program product comprising carrying is on a computer-readable medium
Computer program, which includes the program code for method shown in execution flow chart.In such implementation
In example, which can be downloaded and installed from network by communications portion 409, and/or from detachable media 411
It is mounted.The computer program by central processing unit (CPU) 401 execute when, execute limited in method of the invention it is upper
State function.It should be noted that computer-readable medium of the invention can be computer-readable signal media or computer
Readable storage medium storing program for executing either the two any combination.Computer readable storage medium for example can be --- but it is unlimited
In system, device or the device of --- electricity, magnetic, optical, electromagnetic, infrared ray or semiconductor, or any above combination.It calculates
The more specific example of machine readable storage medium storing program for executing can include but is not limited to: have the electrical connection, portable of one or more conducting wires
Formula computer disk, hard disk, random access storage device (RAM), read-only memory (ROM), erasable programmable read only memory
(EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), light storage device, magnetic memory device or
The above-mentioned any appropriate combination of person.In the present invention, computer readable storage medium can be it is any include or storage program
Tangible medium, which can be commanded execution system, device or device use or be used in combination.And in the present invention
In, computer-readable signal media may include in a base band or as carrier wave a part propagate data-signal, wherein
It carries and calculates readable program code.The data-signal of this propagation can take various forms, including but not limited to electromagnetism
Signal, optical signal or above-mentioned any appropriate combination.Computer-readable signal media can also be computer-readable storage
Any computer-readable medium other than medium, the computer-readable medium can send, propagate or transmit for by instructing
Execution system, device or device use or program in connection.The program generation for including on computer-readable medium
Code can use any appropriate medium transmission, including but not limited to: wirelessly, electric wire, optical cable, RF etc. or above-mentioned any
Suitable combination.
Flow chart and block diagram in attached drawing are illustrated according to the system of various embodiments of the invention, method and computer journey
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
A part of one module, program segment or code of table, a part of the module, program segment or code include one or more use
The executable instruction of the logic function as defined in realizing.It should also be noted that in some implementations as replacements, being marked in box
The function of note can also occur in a different order than that indicated in the drawings.For example, the box of two a sequence of expressions is actually
Execution that can be substantially parallel, they can also be executed in the opposite order sometimes, and this depends on the function involved.Also it to infuse
Meaning, the combination of each box in block diagram and or flow chart and the box in block diagram and/or flow chart can be with holding
The dedicated hardware based system of functions or operations as defined in row is realized, or can use specialized hardware and computer instruction
Combination realize.
Being described in unit involved in the embodiment of the present invention can be realized by way of software, can also be by hard
The mode of part is realized.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
Claims (10)
1. a kind of low wind speed power flow direction verification method of wind power system characterized by comprising
At preset power collecting point, the stator power, rotor power and online power of wind power system are acquired；
According to the collected stator power and the online power, judge that the wind power system is in metasynchronism state, same
Step state or supersynchronous state；And
Whether the calculation formula for verifying power of surfing the Internet under metasynchronism state and supersynchronous state is correct.
2. the low wind speed power flow direction verification method of wind power system according to claim 1, which is characterized in that the online
The calculation formula of power is as follows:
Wherein, PsFor stator power, PrFor rotor power, PgFor power of surfing the Internet.
3. the low wind speed power flow direction verification method of wind power system according to claim 2, which is characterized in that further include:
Real-time monitoring blower wind speed；And
Save collected stator power under different wind speed, rotor power and online power.
4. the low wind speed power flow direction verification method of wind power system according to claim 3, which is characterized in that further include:
According to the blower wind speed of preservation, stator power, rotor power and online power, power flow direction figure is drawn.
5. the low wind speed power flow direction verification method of wind power system according to claim 2, which is characterized in that preset
At power collecting point, the stator power, rotor power and online power of wind power system are acquired, comprising:
At preset power collecting point, acquisition stator voltage, stator current, rotor current, online electric current and online voltage；With
And
Calculate separately stator power, rotor power and online power.
6. the low wind speed power flow direction verification method of wind power system according to claim 5, which is characterized in that calculate separately
Stator power, rotor power and online power, comprising:
Stator power is calculated according to the following formula:
Wherein, PsFor power of surfing the Internet, VsFor voltage of surfing the Internet, IsFor surf the Internet electric current,For power-factor angle.
7. the low wind speed power flow direction verification method of wind power system according to claim 5, which is characterized in that calculate separately
Stator power, rotor power and online power, comprising:
Rotor power is calculated according to the following formula:
Wherein, PrFor stator power, IrFor stator current, ReqFor rotor equivalent resistance.
8. the low wind speed power flow direction verification method of wind power system according to claim 5, which is characterized in that calculate separately
Stator power, rotor power and online power, comprising:
Online power is calculated according to the following formula:
Pg=VgIg
Wherein, PgFor power of surfing the Internet, VgFor voltage of surfing the Internet, IgFor electric current of surfing the Internet.
9. a kind of low wind speed power flow direction of wind power system verifies device characterized by comprising
One or more processors；
Storage device, for storing one or more programs,
When one or more of programs are executed by one or more of processors, so that one or more of processors are real
Now according to claim 1 to the low wind speed power flow direction verification method of wind power system described in 8 any one.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is performed
It realizes according to claim 1 to the low wind speed power flow direction verification method of wind power system described in 8 any one.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600930A (en) * | 2015-01-08 | 2015-05-06 | 东南大学 | Permanent magnet excitation brushless doubly fed wind power generator |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600930A (en) * | 2015-01-08 | 2015-05-06 | 东南大学 | Permanent magnet excitation brushless doubly fed wind power generator |
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| Title |
|---|
| LIQIN SHI等: "Sub-Synchronous Resonance Analysis and Simulation on Wind Farm", 《2017 2ND INTERNATIONAL CONFERENCE ON POWER AND RENEWABLE ENERGY》 * |
| 付小伟: "风电场的接入对电力系统电压稳定性的影响研究", 《中国优秀硕士学位论文全文数据库》 * |
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