CN108923466A - A kind of double mode of Wind turbines is incorporated into the power networks control method and system - Google Patents
A kind of double mode of Wind turbines is incorporated into the power networks control method and system Download PDFInfo
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- CN108923466A CN108923466A CN201810921143.4A CN201810921143A CN108923466A CN 108923466 A CN108923466 A CN 108923466A CN 201810921143 A CN201810921143 A CN 201810921143A CN 108923466 A CN108923466 A CN 108923466A
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- H02J3/386—
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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
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Abstract
The present invention relates to wind power plant Wind turbines intelligence control system fields, it is incorporated into the power networks control method and its system more particularly to a kind of double mode of Wind turbines, including Rotating speed measring module, central control unit, frequency converter of wind power unit, power grid modulation unit and Wind turbines modulation unit, the central processing unit is electrically connected in the Rotating speed measring module and the frequency converter of wind power unit, the frequency converter of wind power unit is electrically connected in the power grid modulation unit and the Wind turbines modulation unit, the present invention is control reference quantity with the generator speed of Wind turbines, the case where stator short-circuiting contactor cannot charge make and break during considering mouse cage and the switching of double-fed both of which, practical operable method is given to the control details near the critical speed of switching, and realize the function that the short time is switched fast.
Description
Technical field
The present invention relates to wind power plant Wind turbines intelligence control system fields, more particularly to a kind of Wind turbines
Double mode is incorporated into the power networks control method and its system.
Background technique
Wind power plant intelligence control system field：It is more next with the fast development of wind-powered electricity generation industry numerical and intelligent
More scientific research institutions begin one's study wind power plant field grade intelligence control system, for promoting the generated energy of whole field.But this
The reasons such as field is started late, and the resource of superposition scientific research institution investment is limited, cause research achievement less.It is transported in practical wind power plant
When battalion, multisystem, multi-platform cooperation are needed, but the data between these systems are not fully used, each system
Kernel control module data it is even more relatively independent, data are unable to timely sharing, though control effect can satisfy check requirements,
But do not accomplish the degree of intelligent fining, cause the avoidable loss generated energy of wind power plant sheet not obtain in time
Effectively retrieve.
Because there is limitation on speed adjustable range in speed variant frequency constant dual feedback asynchronous generating set.In low wind speed area, when wind speed is low
When minimum wind speed Vmin, blower cannot be run with optimum tip-speed ratio.In high wind speed area, wind speed is greater than maximum operating wind speed
When Vmax, similarly there is the situation for being unable to reach optimum tip-speed ratio, and then causing power coefficient Cp low.As a result,
It proposes double mode combination method in the industry at present, two methods of grid-connect mode and asynchronous double-fed grid-connect mode is synchronized using total power,
To improve wind energy utilization, but current document saying is too general, only proposes the saying of principle, can not
The control method that can be used in specific practical operation.
Based on the above circumstances, the present invention provide it is a kind of based on Wind turbines generator speed be reference double mode it is grid-connected and
The practical control program of switching guarantees that Wind turbines can be under mouse cage mode or double-fed mode smoothly and off-grid, and can
Smoothly switch between squirrel-cage motor and double feedback electric engine both of which.
Summary of the invention
It is incorporated into the power networks control method and system the object of the present invention is to provide a kind of double mode of Wind turbines, guarantees wind-powered electricity generation
Unit can be under mouse cage mode or double-fed mode smoothly and off-grid, and can be in squirrel-cage motor and double feedback electric engine both of which
Between smoothly switch.
It is incorporated into the power networks control method, includes the following steps the present invention provides a kind of double mode of Wind turbines：
S1, Rotating speed measring module detect and acquire Wind turbines revolving speed and Wind turbines rotary speed information is uploaded to central control
Unit processed, when Wind turbines revolving speed is not more than V1, central control unit issues starting power grid modulation to frequency converter of wind power unit
The order of unit, while central control unit is handed down to the order of frequency converter of wind power unit starting mouse cage mode, when revolving speed is greater than
When V1, central control unit is handed down to the order of frequency converter of wind power unit starting Wind turbines modulation unit, Wind turbines frequency conversion
Device incision mouse cage mode is incorporated into the power networks, and keeps mouse cage mode operation；
S2, Rotating speed measring module detect and acquire Wind turbines revolving speed and Wind turbines rotary speed information is uploaded to central control
Unit processed, central control unit judge whether Wind turbines revolving speed rises, if Wind turbines revolving speed does not rise, enter step
S1, if Wind turbines revolving speed rises, when Wind turbines revolving speed reaches V3, then from mouse cage pattern switching to double-fed mode；
S3, double-fed mode operation is kept, persistently detects and judge whether Wind turbines revolving speed rises, if Wind turbines revolving speed
Rise, when tachometer value reaches V4, then central control unit control Wind turbines off-grid is shut down；If Wind turbines revolving speed does not rise
Persistently whether detection Wind turbines revolving speed drops to V2；
If S4, Wind turbines revolving speed drop to V2, from double-fed pattern switching to mouse cage mode, and S1 is entered step；If
Wind turbines speed does not drop to V2, then enters step S3；
Wherein, when V1 refers to that the revolving speed and Wind turbines revolving speed of incision mouse cage mode when Wind turbines revolving speed rises decline
Revolving speed is cut out from mouse cage mode off-grid；
V3 refers to be cut out mouse cage mode and cuts the revolving speed of double-fed mode when Wind turbines revolving speed rises；
V2 cuts out double-fed mode and cuts the revolving speed of mouse cage mode when referring to the decline of Wind turbines revolving speed；
V4, which refers to, finally cuts out off-grid protection revolving speed when Wind turbines revolving speed rises.
Further, include the following steps from mouse cage pattern switching into double-fed mode process in S2 step：
Central control unit first cancels the order for being handed down to frequency converter of wind power unit starting mouse cage mode, and then revocation issues
To the order of frequency converter of wind power unit starting Wind turbines modulation unit, when the power of the assembling unit is reduced to 0, central control unit is issued
To the order of frequency converter of wind power unit starting double-fed mode, frequency converter of wind power unit completes the disconnection of short circuit contactor, center control
Unit processed issues the order of frequency converter of wind power unit starting Wind turbines modulation unit, and Wind turbines cut double-fed mode operation.
Further, include the following steps from double-fed pattern switching into mouse cage mode process in S4 step：
Central control unit revocation is handed down to order and the starting wind turbine of the starting double-fed mode of frequency converter of wind power unit
The order of group modulation unit, when Wind turbines power is reduced to 0, central control unit is handed down to frequency converter of wind power unit starting mouse
The order of cage mode, frequency converter of wind power unit complete the actuation of short circuit contactor, and central control unit is handed down to Wind turbines change
Frequency device starts the order of Wind turbines modulation unit, and Wind turbines cut mouse cage mode operation.
The present invention also provides it is a kind of using the Wind turbines double mode be incorporated into the power networks control method Wind turbines it is double
Mode is incorporated into the power networks control system, including Rotating speed measring module, central control unit, frequency converter of wind power unit, and power grid modulation is single
Member and Wind turbines modulation unit, the central processing unit are electrically connected in the Rotating speed measring module and the Wind turbines
Frequency converter, the frequency converter of wind power unit are electrically connected in the power grid modulation unit and the Wind turbines modulation unit.
The present invention has the following advantages that compared with prior art：
1. the grid-connected revolving speed area of the invention by the double-fed wind power generator group between V2 to V4 revolving speed that is incorporated into the power networks at present
Between widen the revolving speed section that increases to V1 and can generate electricity by way of merging two or more grid systems between V1 to V2 downwards, increase the separate unit blower unit time
Generated energy；
2. the present invention is control reference quantity with the generator speed of Wind turbines, it is contemplated that mouse cage and double-fed both of which
Stator short-circuiting contactor cannot charge the case where make and break during switching, give to the control details near the critical speed of switching
Practical operable method, and realize the function that the short time is switched fast.
Detailed description of the invention
Below in conjunction with drawings and examples, the invention will be further described.
Fig. 1 is method flow schematic diagram of the invention；
Fig. 2 is system connection schematic diagram of the invention；
Wherein, when V1 refers to that the revolving speed and Wind turbines revolving speed of incision mouse cage mode when Wind turbines revolving speed rises decline
Revolving speed is cut out from mouse cage mode off-grid；
V3 refers to be cut out mouse cage mode and cuts the revolving speed of double-fed mode when Wind turbines revolving speed rises；
V2 cuts out double-fed mode and cuts the revolving speed of mouse cage mode when referring to the decline of Wind turbines revolving speed；
V4, which refers to, finally cuts out off-grid protection revolving speed when Wind turbines revolving speed rises.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
It is fully disclosed to those skilled in the art.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless otherwise will not be explained in an idealized or overly formal meaning by specific definitions.
It is incorporated into the power networks control method and system the object of the present invention is to provide a kind of double mode of Wind turbines, guarantees wind-powered electricity generation
Unit can be under mouse cage mode or double-fed mode smoothly and off-grid, and can be in squirrel-cage motor and double feedback electric engine both of which
Between smoothly switch.
As shown in Figure 1, being incorporated into the power networks control method, including following step the present invention provides a kind of double mode of Wind turbines
Suddenly：
S1, Rotating speed measring module detect and acquire Wind turbines revolving speed and Wind turbines rotary speed information is uploaded to central control
Unit processed, when Wind turbines revolving speed is not more than V1, central control unit issues starting power grid modulation to frequency converter of wind power unit
The order of unit, while central control unit is handed down to the order of frequency converter of wind power unit starting mouse cage mode, when revolving speed is greater than
When V1, central control unit is handed down to the order of frequency converter of wind power unit starting Wind turbines modulation unit, Wind turbines frequency conversion
Device incision mouse cage mode is incorporated into the power networks, and keeps mouse cage mode operation；
S2, Rotating speed measring module detect and acquire Wind turbines revolving speed and Wind turbines rotary speed information is uploaded to central control
Unit processed, central control unit judge whether Wind turbines revolving speed rises, if Wind turbines revolving speed does not rise, enter step
S1, if Wind turbines revolving speed rises, when Wind turbines revolving speed reaches V3, then from mouse cage pattern switching to double-fed mode；
S3, double-fed mode operation is kept, persistently detects and judge whether Wind turbines revolving speed rises, if Wind turbines revolving speed
Rise, when tachometer value reaches V4, then central control unit control Wind turbines off-grid is shut down；If Wind turbines revolving speed does not rise
Persistently whether detection Wind turbines revolving speed drops to V2；
If S4, Wind turbines revolving speed drop to V2, from double-fed pattern switching to mouse cage mode, and S1 is entered step；If
Wind turbines speed does not drop to V2, then enters step S3；
Wherein, when V1 refers to that the revolving speed and Wind turbines revolving speed of incision mouse cage mode when Wind turbines revolving speed rises decline
Revolving speed is cut out from mouse cage mode off-grid；
V3 refers to be cut out mouse cage mode and cuts the revolving speed of double-fed mode when Wind turbines revolving speed rises；
V2 cuts out double-fed mode and cuts the revolving speed of mouse cage mode when referring to the decline of Wind turbines revolving speed；
V4, which refers to, finally cuts out off-grid protection revolving speed when Wind turbines revolving speed rises.
Further, include the following steps from mouse cage pattern switching into double-fed mode process in S2 step：
Central control unit first cancels the order for being handed down to frequency converter of wind power unit starting mouse cage mode, and then revocation issues
To the order of frequency converter of wind power unit starting Wind turbines modulation unit, when the power of the assembling unit is reduced to 0, central control unit is issued
To the order of frequency converter of wind power unit starting double-fed mode, frequency converter of wind power unit completes the disconnection of short circuit contactor, center control
Unit processed issues the order of frequency converter of wind power unit starting Wind turbines modulation unit, and Wind turbines cut double-fed mode operation.
Further, include the following steps from double-fed pattern switching into mouse cage mode process in S4 step：
Central control unit revocation is handed down to order and the starting wind turbine of the starting double-fed mode of frequency converter of wind power unit
The order of group modulation unit, when Wind turbines power is reduced to 0, central control unit is handed down to frequency converter of wind power unit starting mouse
The order of cage mode, frequency converter of wind power unit complete the actuation of short circuit contactor, and central control unit is handed down to Wind turbines change
Frequency device starts the order of Wind turbines modulation unit, and Wind turbines cut mouse cage mode operation.
As shown in Fig. 2, being incorporated into the power networks control method the present invention also provides a kind of using the Wind turbines double mode
Wind turbines double mode is incorporated into the power networks control system, including Rotating speed measring module, central control unit, frequency converter of wind power unit,
Power grid modulation unit and Wind turbines modulation unit, the central processing unit are electrically connected in the Rotating speed measring module and institute
Frequency converter of wind power unit is stated, the frequency converter of wind power unit is electrically connected in the power grid modulation unit and the Wind turbines
Modulation unit.
The present invention is by the grid-connected revolving speed section for the double-fed wind power generator group between V2 to V4 revolving speed that is incorporated into the power networks at present
It widens to V1 downwards, increases the revolving speed section that can be generated electricity by way of merging two or more grid systems between V1 to V2, increase the hair of separate unit blower unit time
The case where electricity, running speed section relative to existing double-fed wind power generator group is between V2 to V4, the present invention widens
Especially under small wind wind regime, double-fed fan motor unit traditional at present is hovered near grid-connected critical speed V2 in running speed section
Can not stablize it is grid-connected, using the present invention can smoothly realize that the stabilization between V1 to V2 is incorporated into the power networks.
The present invention is control reference quantity with the generator speed of Wind turbines, it is contemplated that mouse cage and double-fed both of which are cut
The case where stator short-circuiting contactor cannot charge make and break during changing, gives the control details near the critical speed of switching and cuts
Real operable method, and realize the function that the short time is switched fast.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means in the scope of the present invention
Within and form different embodiments.For example, in the following claims, embodiment claimed it is any it
One can in any combination mode come using.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (4)
- The control method 1. a kind of double mode of Wind turbines is incorporated into the power networks, which is characterized in that include the following steps：S1, Rotating speed measring module detect and acquire Wind turbines revolving speed and Wind turbines rotary speed information is uploaded to center control list Member, when Wind turbines revolving speed is not more than V1, central control unit issues starting power grid modulation unit to frequency converter of wind power unit Order, while central control unit be handed down to frequency converter of wind power unit starting mouse cage mode order, when revolving speed be greater than V1 when, Central control unit is handed down to the order of frequency converter of wind power unit starting Wind turbines modulation unit, frequency converter of wind power unit incision Mouse cage mode is incorporated into the power networks, and keeps mouse cage mode operation；S2, Rotating speed measring module detect and acquire Wind turbines revolving speed and Wind turbines rotary speed information is uploaded to center control list Member, central control unit judge whether Wind turbines revolving speed rises, if Wind turbines revolving speed does not rise, enter step S1, if Wind turbines revolving speed rises, when Wind turbines revolving speed reaches V3, then from mouse cage pattern switching to double-fed mode；S3, double-fed mode operation is kept, persistently detects and judge whether Wind turbines revolving speed rises, if on Wind turbines revolving speed It rises, when tachometer value reaches V4, then central control unit control Wind turbines off-grid is shut down；It is held if Wind turbines revolving speed does not rise Whether continuous detection Wind turbines revolving speed drops to V2；If S4, Wind turbines revolving speed drop to V2, from double-fed pattern switching to mouse cage mode, and S1 is entered step；If wind-powered electricity generation Unit speed does not drop to V2, then enters step S3；Wherein, V1 refers to when the revolving speed and Wind turbines revolving speed of incision mouse cage mode when Wind turbines revolving speed rises decline from mouse Cage mode off-grid cuts out revolving speed；V3 refers to be cut out mouse cage mode and cuts the revolving speed of double-fed mode when Wind turbines revolving speed rises；V2 cuts out double-fed mode and cuts the revolving speed of mouse cage mode when referring to the decline of Wind turbines revolving speed；V4, which refers to, finally cuts out off-grid protection revolving speed when Wind turbines revolving speed rises.
- The control method 2. double mode of Wind turbines according to claim 1 is incorporated into the power networks, which is characterized in that walked in S2 Suddenly, include the following steps from mouse cage pattern switching into double-fed mode process：Central control unit first cancels the order for being handed down to frequency converter of wind power unit starting mouse cage mode, and then revocation is handed down to wind Motor group frequency converter starts the order of Wind turbines modulation unit, and when the power of the assembling unit is reduced to 0, central control unit is handed down to wind Motor group frequency converter starts the order of double-fed mode, and frequency converter of wind power unit completes the disconnection of short circuit contactor, and center control is single Member issues the order of frequency converter of wind power unit starting Wind turbines modulation unit, and Wind turbines cut double-fed mode operation.
- The control method 3. double mode of Wind turbines according to claim 1 is incorporated into the power networks, which is characterized in that walked in S4 Suddenly, include the following steps from double-fed pattern switching into mouse cage mode process：Central control unit revocation is handed down to order and the starting Wind turbines tune of the starting double-fed mode of frequency converter of wind power unit The order of unit processed, when Wind turbines power is reduced to 0, central control unit is handed down to frequency converter of wind power unit starting mouse cage mould The order of formula, frequency converter of wind power unit complete the actuation of short circuit contactor, and central control unit is handed down to frequency converter of wind power unit Start the order of Wind turbines modulation unit, Wind turbines cut mouse cage mode operation.
- 4. a kind of be incorporated into the power networks the Wind turbines double mode of control method using Wind turbines double mode as described in claim 1 Be incorporated into the power networks control system, which is characterized in that including Rotating speed measring module, central control unit, frequency converter of wind power unit, power grid Modulation unit and Wind turbines modulation unit, the central processing unit are electrically connected in the Rotating speed measring module and the wind Motor group frequency converter, the frequency converter of wind power unit are electrically connected in the power grid modulation unit and Wind turbines modulation Unit.
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| CN201810921143.4A CN108923466A (en) | 2018-08-14 | 2018-08-14 | A kind of double mode of Wind turbines is incorporated into the power networks control method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110566402A (en) * | 2019-03-19 | 2019-12-13 | 南京南瑞继保电气有限公司 | Control method for automatic start and stop of permanent magnet direct drive fan main control system unit |
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| CN201805236U (en) * | 2010-05-17 | 2011-04-20 | 东南大学 | Series type LVRT (low voltage ride through) control device of wind generating set |
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