CN105041567B - A kind of Wind turbines limit Poewr control method provided with red band - Google Patents
A kind of Wind turbines limit Poewr control method provided with red band Download PDFInfo
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- CN105041567B CN105041567B CN201510456413.5A CN201510456413A CN105041567B CN 105041567 B CN105041567 B CN 105041567B CN 201510456413 A CN201510456413 A CN 201510456413A CN 105041567 B CN105041567 B CN 105041567B
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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
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Abstract
The invention discloses a kind of Wind turbines provided with red band to limit Poewr control method; by the way that the red band value in the size and conventional control strategy that limit performance number is compared; and then mark off permission speed setting region; while ensuring that unit effectively avoids red band in the process of running; desired power is exported, and Control performance standard is divided into three classes：Load reduction is used as leading indicator, selects different speed setting values, you can meet the performance requirement of unit different designs type as leading indicator, the overall target and generated energy optimization of load reduction and generated energy optimization.The present invention can effectively solve the problems, such as the limit Power operation of such unit with red band, be with a wide range of applications.
Description
Technical field
The present invention relates to the technical field of Wind turbines limit Power Control, a kind of wind-powered electricity generation provided with red band is referred in particular to
Unit limits Poewr control method.
Background technology
Modern wind generating set is substantially all as speed change, flexible structure；And from the thousand of last century on single-machine capacity
Watt rank breaks through to current 3-8MW, and the single-machine capacity that future is applied to sea is up to 10MW.In this context, it is
Farthest obtain wind energy and reduce rack load, wind power generating set needs to possess large-scale variable-speed operation section.But
Large-scale velocity interval would potentially result in unit impeller speed and the other parts of unit, such as blade, pylon and driving-chain
Intrinsic frequency overlapped on some speed point, so as to cause to resonate.When the optimization design of part can not solve resonance problem,
Unit operation is avoided in the method that resonance speed point is unique feasible by control strategy.Generally, resonance speed exists
Between grid-connected rotating speed and rated speed, therefore in conventional control strategy, around this region control strategy both in
Torque controller and the optimization design carried out.
In presently disclosed document, the rotating speed for having two kinds of control strategies to establish and across including comprising resonance speed is prohibited
Area, avoid unit operation non-thread in the specific range of speeds, the rotary speed-torque that respectively Dutch wind energy research institution ECN is proposed
Property function method [bibliography：Crossing resonance rotor speeds of wind turbines] (method 1) and
Slope setting method [the bibliography based on PI controls that GH companies propose：The Design of closed loop
Controllers for wind turbines] (method 2).Rotary speed-torque based on routine is tabled look-up method for controlling torque, though
Right no Patents documents disclose its specific design scheme, but method 1 has obtained extensively should in wind power control system
With, such as in the application of two blade unit control systems of bright positive wind-powered electricity generation.PI control of the method 2 based on rotary speed-torque, although GH
There is the principle that it was told about in pertinent literature in company, but there was only Patent design of the bright positive wind-powered electricity generation application based on this method at present
[referenced patent：A kind of control method for avoiding wind power tower intrinsic frequency point].But in above-mentioned document and patent, for turn
The control strategy design limitation of fast forbidden zone is under ordinary control mode, namely unit operation is under the pattern of maximum energy capture.
As the continuous of wind-powered electricity generation proportion is risen in power system, to maintain the stability of network system, wind power system is wanted
Summation conventional energy resource is equally scheduled control.No matter for concentration bulk power system and off-network island-grid at present, or will
In the distributed power grid system come, come from the conventional fortune that the limit Power Control under dispatching of power netwoks instruction all would is that Wind turbines
Row mode.For general Wind turbines, limit Poewr control method is studied in numerous documents, such as [with reference to text
Offer：Comparative study on the performance of control systems for doubly fed
Induction generator (DFIG) wind turbines operating with power regulation] in be directed to
Three kinds of limit power control strategies of double-fed fan motor unit comparative studies.In terms of patent application, successively there is North China Electric Power University public
The wind power plant limit Power operation control method and system [referenced patent opened：A kind of method for controlling Wind turbines limit Power operation
And system], the golden disclosed limit Poewr control method [referenced patent of wind science and technology：A kind of limit Power operation control method of blower fan, dress
Put and system] and the disclosed limit power method [referenced patent of state's electricity combined power：A kind of speed-changing oar-changing is away from Wind turbines full blast speed
Limit power optimization control method].But above-mentioned document and patent only consider the normal unit allocation of the full range of speeds, it can not meet have
There is the unit demand of red band.
For the unit with red band, it is necessary to design suitable limit power with reference to the characteristics of its original control strategy
Control strategy, meet power output requirement of the unit under ordinary control mode and limit power control mode, and the load of itself
Lotus constrains.By studying the conventional control strategy with red band unit, the specific demand under limit Power Control, this hair are considered
Bright proposition a solution.
The content of the invention
The shortcomings that it is an object of the invention to overcome prior art and deficiency, there is provided a kind of wind turbine provided with red band
Group limit Poewr control method, can effectively solve the problems, such as the limit Power operation of such unit with red band.
To achieve the above object, technical scheme provided by the present invention is：A kind of Wind turbines limit provided with red band
Poewr control method, the Wind turbines limit Poewr control method using speed setting as the first control targe, and power output is made
For the second control targe, by the way that the red band value in the size and conventional control strategy that limit performance number is compared, and then divide
Go out to allow speed setting region, it is ensured that while unit effectively avoids red band in the process of running, desired power is exported,
And Control performance standard is divided into three classes：Load reduction refers to as the synthesis that leading indicator, load reduction and generated energy optimize
Mark and generated energy optimization are used as leading indicator, select different speed setting values, you can meet the property of unit different designs type
Can demand；It comprises the following steps：
1) according to limit performance number and the comparative result of the power limit of red band, speed setting target zone is divided
For first area and second area；
2) according to Control performance standard, required speed setting value is selected from corresponding target area as pitch control
The input of device and torque controller；
3) carried out according to the setting of speed setting value, pitch control device and torque controller in the presence of conventional controller
Output.
In step 1), the big value in the power limit that will limit performance number and red band is compared；
When limit performance number is in the range of [0, the big value of the power limit of red band], speed setting target is limited in first
Region；When limit performance number is in the range of [the big value of the power limit of red band, rated power], speed setting target is limited in
Second area；
First area is located at [grid-connected rotating speed, the lower limit rotating speed of red band] scope, and second area is located at [red band
Lower limit rotating speed, rated speed] scope；
To avoid limiting performance number, frequently speed setting target caused by change is come between first area and second area
Switchback is changed, and the setting stand-by period makes speed setting target area not carry out region switching within the stand-by period；
When speed setting target switches between first area and second area, set slope to limit, avoid rotating speed from setting
Mutation of the definite value in handoff procedure.
In step 2), the Control performance standard is divided into three kinds：Load reduction is as leading indicator, load reduction and hair
The overall target of electricity optimization and generated energy optimization are used as leading indicator；
The selection of speed setting value is divided into Three models：Minimum speed setting, intermediate speed setting and maximum speed setting,
It is corresponding to optimize three kinds of performance indications with load reduction, overall target and generated energy respectively；
When speed setting target is located at first area, minimum speed corresponding to minimum speed setting selection limit performance number,
The lower limit rotating speed of maximum speed setting selection red band, intermediate speed setting selection minimum speed and maximum speed are averaged
Value；
When speed setting target is located at second area, the upper limit rotating speed and limit work(of minimum speed setting selection red band
Smaller value between minimum speed corresponding to rate value, maximum speed setting selection rated speed, intermediate speed setting is chosen minimum
The average value of rotating speed and maximum speed；
Minimum speed corresponding to limit performance number is calculated according to value set in advance of tabling look-up, and tables look-up a basis electrically
Restriction relation between the capacity and rotating speed of part is set.
In step 3), speed setting value respectively as conventional pitch control device and torque controller given input, often
Rule pitch control device is remained stationary, and torque controller needs to be exported after carrying out amplitude limit；
The amplitude limit higher limit of torque controller takes limit performance number to be multiplied by particular factor divided by current tachometer value, the particular factor
Equal to the ratio of the peak power and limit performance number of the permission under limit power.
The present invention compared with prior art, has the following advantages that and beneficial effect：
Limit Poewr control method proposed by the present invention can effectively solve the limit power fortune of such unit with red band
Row problem.Allow to turn by by the red band value in the size and conventional control strategy that limit performance number comparing, and then marking off
Fast setting regions, it is ensured that while unit effectively avoids red band in the process of running, export desired power.Meanwhile will
Control performance standard is divided into three classes, selects different speed setting values, you can meets the performance requirement of unit different designs type.
Therefore, in the case of making limited modification under only to conventional control strategy (torque controller is exported and added using limiting performance number
Torque limit value is calculated) meet unit conventional operation and limit Power operation, technical scheme proposed by the present invention can be easily
Ground is applied to existing control strategy.Rule of thumb, in the case where limiting power mode of operation, higher running speed is in lifting unit energy
Also the load of unit critical piece is increased while amount capture.Based on this experience, allowing, speed setting regional choice is suitable
Speed setting value, you can to the different demands of control performance run time meeting to consider unit difference and under different wind regime, have
It is widely applied prospect.
Brief description of the drawings
Fig. 1 is one of direct torque performance diagram of unit under regular run mode with red band.
Fig. 2 is the two of the direct torque performance diagram of the unit under regular run mode with red band.
Fig. 3 is the flow chart that Wind turbines of the present invention limit Poewr control method.
Embodiment
With reference to specific embodiment, the invention will be further described.
, it is necessary to be carried out to the control strategy under the regular run mode with red band before the inventive method is introduced
Introduce.Under regular run mode, the direct torque characteristic curve with the unit of red band is divided into such as accompanying drawing 1 and the institute of accompanying drawing 2
Two kinds shown.
In unit direct torque characteristic curve shown in Fig. 1, the range of speeds described by B-C is red band, A-B and C-
The range of speeds described by D is the neighborhood of red band.In the rotating speed that A-D characterizes beyond scope, set according to optimum torque
Rotary speed-torque is put to table look-up a little.Red band shown in Fig. 1 is characterised by that power points corresponding to rotating speed A and D point is optimal work(
Rate point, and power points corresponding to B and C points is then the power limit in red band.It is for guarantee B-C section rotary speed-torque curves
Astable operation curve, B points performance number are more than C point power points.
In unit direct torque characteristic curve shown in Fig. 2, the range of speeds described by C-E is red band.In A-B-C
In the range of speeds described by F-G-H, rotary speed-torque characteristic curve is set according to optimum torque curve.Rotating speed shown in Fig. 2
Forbidden zone is characterised by that power points corresponding to rotating speed C and F point is best power point, and power points corresponding to D and E points is then to turn
Power limit in fast forbidden zone.To ensure that unit will not be frequently across crossing over back and forth in red band C-E sections, D point performance numbers are big
In E point power points.
To realize conventional control and limiting the flexible switching between Power Control, while generating unit speed is controlled in red band model
Outside enclosing, limit power method proposed by the present invention is using speed setting as the first control targe, and power output is as the second control mesh
Mark, as shown in figure 3, comprising the following steps：
1) according to limit performance number and the comparative result of the power limit of red band, speed setting target zone is divided
For first area and second area.
2) according to Control performance standard, suitable speed setting value is selected from corresponding target area as pitch control
The input of device and torque controller.
3) carried out according to the setting of speed setting value, pitch control device and torque controller in the presence of conventional controller
Output.
In step 1), the big value in the power limit that will limit performance number and red band is compared；
When limit performance number is in the range of [0, the big value of the power limit of red band], speed setting target is limited in first
Region；When limit performance number is in the range of [the big value of the power limit of red band, rated power], speed setting target is limited in
Second area；
First area is located at [grid-connected rotating speed, the lower limit rotating speed of red band] scope, and second area is located at [red band
Lower limit rotating speed, rated speed] scope；
To avoid limiting performance number, frequently speed setting target caused by change is come between first area and second area
Switchback is changed, and the setting stand-by period makes speed setting target area not carry out region switching within the stand-by period；
When speed setting target switches between first area and second area, set slope to limit, avoid rotating speed from setting
Mutation of the definite value in handoff procedure.
In step 2), Control performance standard is divided into three kinds：Load reduction is as leading indicator, load reduction and generated energy
Overall target and the generated energy optimization of optimization are used as leading indicator；
The selection of speed setting value is divided into Three models：Minimum speed setting, intermediate speed setting and maximum speed setting,
It is corresponding to optimize three kinds of performance indications with load reduction, overall target and generated energy respectively；
When speed setting target is located at first area, minimum speed corresponding to minimum speed setting selection limit performance number,
The lower limit rotating speed of maximum speed setting selection red band, intermediate speed setting selection minimum speed and maximum speed are averaged
Value；
When speed setting target is located at second area, the upper limit rotating speed and limit work(of minimum speed setting selection red band
Smaller value between minimum speed corresponding to rate value, maximum speed setting selection rated speed, intermediate speed setting is chosen minimum
The average value of rotating speed and maximum speed；
Minimum speed corresponding to limit performance number is calculated according to value set in advance of tabling look-up, and tables look-up a basis electrically
Restriction relation between the capacity and rotating speed of part (referring mainly to generator and current transformer) is set.
In step 3), speed setting value respectively as conventional pitch control device and torque controller given input, often
Rule pitch control device is remained stationary, and torque controller needs to be exported after carrying out amplitude limit；
The amplitude limit higher limit of torque controller takes limit performance number to be multiplied by particular factor divided by current tachometer value, the particular factor
Equal to the ratio of the peak power and limit performance number of the permission under limit power.
It is in summary, of the invention by the way that the red band value in the size and conventional control strategy that limit performance number is compared,
And then mark off permission speed setting region, it is ensured that while unit effectively avoids red band in the process of running, export the phase
The power of prestige.Meanwhile Control performance standard is divided into three classes, select different speed setting values, you can meet that unit difference is set
Count the performance requirement of type.Therefore, (torque controller is exported in the case of making limited modification under only to conventional control strategy
Add and torque limit value be calculated using limiting performance number) meet unit conventional operation and limit Power operation, it is proposed by the present invention
Technical scheme can be easily applied to existing control strategy.Rule of thumb, in the case where limiting power mode of operation, higher operation
Rotating speed also increases the load of unit critical piece while unit energy capture is lifted.Based on this experience, set allowing rotating speed
Determine the suitable speed setting value of regional choice, you can meet consider unit difference run time and different wind regime under to control performance
Different demands, be with a wide range of applications, be worthy to be popularized.
Examples of implementation described above are only the preferred embodiments of the invention, and the implementation model of the present invention is not limited with this
Enclose, therefore the change that all shape, principles according to the present invention are made, it all should cover within the scope of the present invention.
Claims (1)
- A kind of 1. Wind turbines limit Poewr control method provided with red band, it is characterised in that：The Wind turbines limit power Control method is using speed setting as the first control targe, and power output is as the second control targe, by will limit performance number Red band value in size and conventional control strategy compares, and then marks off permission speed setting region, it is ensured that unit is being transported While red band is effectively avoided during row, desired power is exported, and Control performance standard is divided into three classes：Load Reduction is used as leading indicator, and the overall target and generated energy optimization of load reduction and generated energy optimization are used as leading indicator, selected Different speed setting value, you can meet the performance requirement of unit different designs type；It comprises the following steps：1) according to limit performance number and the comparative result of the power limit of red band, speed setting target zone is divided into the One region and second area；Wherein, the big value in the power limit that will limit performance number and red band is compared；When limit performance number is in the range of [0, the big value of the power limit of red band], speed setting target is limited in the firstth area Domain；When limit performance number is in the range of [the big value of the power limit of red band, rated power], speed setting target is limited in the Two regions；First area is located at [grid-connected rotating speed, the lower limit rotating speed of red band] scope, and second area is located at the [lower limit of red band Rotating speed, rated speed] scope；To avoid limiting performance number, frequently speed setting target caused by change carrys out switchback between first area and second area Change, the setting stand-by period makes speed setting target area not carry out region switching within the stand-by period；When speed setting target switches between first area and second area, set slope to limit, avoid speed setting value Mutation in handoff procedure；2) according to Control performance standard, select required speed setting value as pitch control device from corresponding target area and The input of torque controller；Wherein, the Control performance standard is divided into three kinds：Load reduction is as leading indicator, load reduction Leading indicator is used as with the overall target of generated energy optimization and generated energy optimization；The selection of speed setting value is divided into Three models：Minimum speed setting, intermediate speed setting and maximum speed setting, respectively It is corresponding to optimize three kinds of performance indications with load reduction, overall target and generated energy；When speed setting target is located at first area, minimum speed corresponding to minimum speed setting selection limit performance number, highest Speed setting selects the lower limit rotating speed of red band, and the average value of minimum speed and maximum speed is chosen in intermediate speed setting；When speed setting target is located at second area, the upper limit rotating speed and limit performance number of minimum speed setting selection red band Minimum speed is chosen in smaller value between corresponding minimum speed, maximum speed setting selection rated speed, intermediate speed setting With the average value of maximum speed；Minimum speed corresponding to limit performance number is calculated according to value set in advance of tabling look-up, and is tabled look-up a little according to electric component Capacity and rotating speed between restriction relation set；3) according to the setting of speed setting value, pitch control device and torque controller carry out defeated in the presence of conventional controller Go out；Wherein, speed setting value is respectively as the given input of conventional pitch control device and torque controller, conventional pitch control device Remain stationary, torque controller needs to be exported after carrying out amplitude limit；The amplitude limit higher limit of torque controller takes limit performance number to be multiplied by particular factor divided by current tachometer value, and the particular factor is equal to Limit the ratio of the peak power and limit performance number of the permission under power.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105909469B (en) * | 2016-04-29 | 2018-09-25 | 南京理工大学 | A kind of limit Poewr control method for the variable speed constant frequency Wind turbines reducing variable pitch action |
| US11384731B2 (en) | 2017-11-06 | 2022-07-12 | Vestas Wind Systems A/S | Method and system for controlling a wind turbine to manage edgewise blade vibrations |
| CN109973302B (en) * | 2017-12-28 | 2020-05-05 | 北京金风科创风电设备有限公司 | Power limiting control method and device for wind generating set |
| CN110657066B (en) * | 2018-06-29 | 2021-10-01 | 中车株洲电力机车研究所有限公司 | Wind turbine generator set control method, controller and device |
| CN112392656B (en) * | 2019-08-16 | 2022-03-29 | 北京金风科创风电设备有限公司 | Power control method, device and medium for wind generating set |
| CN113847195B (en) * | 2020-06-28 | 2023-06-02 | 北京金风科创风电设备有限公司 | Wind generating set and rotational speed avoiding control method and device thereof |
| CN114320741A (en) * | 2020-09-30 | 2022-04-12 | 新疆金风科技股份有限公司 | Power control method and equipment of wind generating set |
| CN112283025B (en) * | 2020-10-14 | 2021-10-12 | 明阳智慧能源集团股份公司 | Control method for preventing wind turbine generator from operating in resonance region in limited power mode |
| CN114576090A (en) * | 2020-12-01 | 2022-06-03 | 新疆金风科技股份有限公司 | Rotating speed control method, device, equipment and medium of wind generating set |
| CN113669197B (en) * | 2021-09-28 | 2022-08-30 | 中国华能集团清洁能源技术研究院有限公司 | Wind generating set rotating speed control method and system based on real-time operation data |
| CN115750204A (en) * | 2022-11-15 | 2023-03-07 | 中国华能集团清洁能源技术研究院有限公司 | Method and system for adjusting rotating speed of generator of wind turbine generator |
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| CN103758698B (en) * | 2014-01-22 | 2016-08-17 | 北京金风科创风电设备有限公司 | Method for controlling number of revolution and system for Wind turbines |
| CN104265568B (en) * | 2014-08-28 | 2015-10-07 | 新疆金风科技股份有限公司 | A kind of power per liter progress control method of blower fan, Apparatus and system |
| CN104405581B (en) * | 2014-10-24 | 2017-03-08 | 北京金风科创风电设备有限公司 | Wind generating set rotating speed control method and control system |
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