CN102400855A - Power adjusting method and device in wind farm - Google Patents
Power adjusting method and device in wind farm Download PDFInfo
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- CN102400855A CN102400855A CN2011103637056A CN201110363705A CN102400855A CN 102400855 A CN102400855 A CN 102400855A CN 2011103637056 A CN2011103637056 A CN 2011103637056A CN 201110363705 A CN201110363705 A CN 201110363705A CN 102400855 A CN102400855 A CN 102400855A
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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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- 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
Abstract
The invention belongs to the technical field of wind power generation, and particularly provides a power adjusting method and a power adjusting device in a wind farm. The method comprises the following steps of: 1) acquiring an effective power demand value of the wind farm in real time, and taking the effective power demand value as target output power Pr of the wind farm; 2) acquiring the current actual output power P of the wind farm; 3) calculating a power adjusting value of the wind farm according to the current actual output power P and the target output power Pr of the wind farm; 4) determining a power adjusting strategy on the basis of the power adjusting value; and 5) controlling the working state of corresponding fans in the wind farm on the basis of the power adjusting strategy; and repeating the step 2) to the step 5), till the output power of the wind farm meets the power demand of a power grid. In the power adjusting method and the device provided by the invention, the output power of the wind farm can be adjusted in time and accurately, the stability and the safety of the operation of the fans are improved and the labor cost also can be greatly saved simultaneously.
Description
Technical field
The present invention relates to technical field of wind power generation, be specifically related to the power regulating method and the PCU Power Conditioning Unit of wind energy turbine set.
Background technique
Along with the continuous development of wind-powered electricity generation, the wind energy turbine set with a large amount of wind power generating set is also more and more, and wind energy turbine set is being born the power supply task of responsive electricity grid requirement as the part of power supply system.Along with improving constantly of the output power that is incorporated into the power networks, the stability of wind farm grid-connected operation is important all the more to the stable role of whole mains supply.Thereby in practical application, just need need come the output power of real-time regulated whole wind electric field according to the power that is incorporated into the power networks.Particularly, wind energy turbine set will receive the power dispatching requirement from electrical network in real time, and controls the whole generated output of wind energy turbine set based on this, to satisfy the requirement of electrical network.
At present, mostly existing wind energy turbine set power adjustments mode is the mode of artificial manual tune.Particularly, at first inform by telephone wind energy turbine set through manual work and carry out power adjustments by the electrical network aspect; Then, the wind energy turbine set operator on duty compares the requirements of electrical network with the wind energy turbine set total output value of generated output at this moment; Then, come the manually shutdown of control blower fan, startup, lifting/lowering power based on difference relatively and by means of the wind energy turbine set control device, reach the desired value that electrical network requires so that control the active power of wind farm grid-connected point by the electric field operator on duty.For example, when power per liter, the electric field operator on duty can distribute to the unit that can improve generated output in the wind energy turbine set more once with above-mentioned relatively difference.Certainly; When distributing concrete power adjustments amount; State according to each unit in the wind energy turbine set; Can with the total performance number that need to promote randomly once mean allocation give a plurality of units, also can the total performance number that need to promote be distributed to a plurality of units randomly once unequally.
Although above-mentioned wind energy turbine set power adjustments mode is widely adopted at present, there is disadvantage inevitably in it in practical application:
One of which; Because above-mentioned wind energy turbine set power adjustments mode needs a large amount of operations manually, in this case, regardless of the scale of wind energy turbine set; All need dispose the operator on duty of some, so that come manually to control fan starting or the shutdown in the wind energy turbine set according to the demand of electrical network.Thereby existing wind energy turbine set power adjustments mode needs the manpower of labor.
They are two years old; Because above-mentioned wind energy turbine set power adjustments mode is accomplished through operator's manual work, that is, and after operator receive the electrical network regulatory demand; The requirements that obtains electrical network through calculating is with the comparison difference between the wind energy turbine set total output value of generated output of this moment; And manually control fan starting, shutdown, lifting/lowering power in the wind energy turbine set, thereby have that error is big, speed of response waits problem slowly, and then causes the loss of wind energy turbine set generated energy according to this comparison difference.
Its three, above-mentioned wind energy turbine set power adjustments mode is not called and is controlled it according to the concrete working condition of each blower fan in the wind energy turbine set, but comparatively randomly blower fan is opened/stop the operation of operating or carrying out lifting/lowering power by operator; And when distributing the power adjustments amount is disposable distribution, rather than adjusts this power adjustments amount gradually according to the situation of change of blower fan output power.Therefore; Above-mentioned wind energy turbine set power adjustments mode not only highly relies on the reliability of corresponding unit work; But also ignored blower fan and used tired situation (the for example situation such as temperature of fan operation time or its electric component) because of operating corresponding blower fan randomly; Thereby some unit is being moved for a long time always, other units are never operation of long period then, thereby causes the unit rate of fault to promote.And blower fan opens/stops the stability and the Security that itself will influence blower fan continually, also can influence the working life of blower fan simultaneously.
Summary of the invention
For solving the problems of the technologies described above, the present invention provides a kind of power regulating method of wind energy turbine set, and it can adjust the output power of wind energy turbine set, stability and the Security that improves fan operation timely and accurately, can also save human cost greatly simultaneously.
For solving the problems of the technologies described above, the present invention also provides a kind of PCU Power Conditioning Unit of wind energy turbine set, and it can adjust the output power of wind energy turbine set, stability and the Security that improves fan operation equally timely and accurately, can also save human cost greatly simultaneously.
For this reason, the present invention provides a kind of power regulating method of wind energy turbine set, and it comprises the steps: 1) gather the useful horsepower requirements of electrical network in real time to said wind energy turbine set, and with its target output Pr as wind energy turbine set; 2) obtain the current real output P of said wind energy turbine set; 3) real output P and the target output Pr current according to said wind energy turbine set calculates the power adjustment of said wind energy turbine set; 4) confirm power adjustment strategy based on said power adjustment; 5) control the working state of corresponding blower fan in the said wind energy turbine set based on said power adjustment strategy; Repeat above-mentioned steps 2) to step 5), satisfy the power demand of electrical network until the output power of said wind energy turbine set.
Wherein, Said power adjustment comprises power adjustment numerical value Δ P, and in said step 3), real output P and the target output Pr current according to said wind energy turbine set obtain said power adjustment numerical value Δ P; Wherein, said power adjustment numerical value Δ P=Pr-P.
Wherein, Said power adjustment comprises power adjustment rate X%, and in said step 3), real output P and the target output Pr current according to said wind energy turbine set obtain said power adjustment numerical value Δ P; Then obtain said power adjustment rate X% according to said wind energy turbine set current power adjustment numerical value Δ P and real output P again; Wherein, said power adjustment numerical value Δ P=Pr-P, said power adjustment rate X%=Δ P/P.
Wherein, In said step 4); Absolute value with said power adjustment numerical value | Δ P| compares with preset adjustment threshold value; If the absolute value of said power adjustment numerical value | Δ P| then need to confirm the output power of the said wind energy turbine set of adjustment greater than preset adjustment threshold value, and confirms result and said power adjustment and confirm corresponding power adjustment strategy based on this; Otherwise; Confirm that said power adjustment strategy is not for adjusting the output power of said wind energy turbine set; And in said step 5), when said power adjustment strategy is the output power of the said wind energy turbine set of adjustment, adjust the output power of corresponding blower fan in the said wind energy turbine set based on said power adjustment strategy; When said power adjustment strategy when not adjusting the output power of said wind energy turbine set, need not to adjust output power and the direct process ends of said wind energy turbine set.
Wherein, when said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment, in said step 5), with the unified adjustment of the output power X% of the unit that is incorporated into the power networks in the said wind energy turbine set.
Wherein, when said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment, in said step 5), only with the unified adjustment of the output power X% of the limit power unit that has been incorporated into the power networks in the said wind energy turbine set.
Wherein, When said power adjustment strategy is positive number for the output power of the said wind energy turbine set of adjustment and power adjustment rate X%; Before said step 5), also comprise step 45): judge whether there is the standby unit in the said wind energy turbine set; If, then start corresponding standby unit and it is incorporated into the power networks, forward step 2 then to); If not, then directly forward step 5) to.
Wherein, When said power adjustment strategy is negative for the output power of the said wind energy turbine set of adjustment and power adjustment rate X%; Before said step 5), also comprise step 46): judge whether to make the compressor emergency shutdown that has been incorporated into the power networks in the said wind energy turbine set; If, then make corresponding blower fan compressor emergency shutdown, forward step 2 then to); If not, then directly forward step 5) to.
As another technological scheme; The present invention also provides a kind of PCU Power Conditioning Unit of wind energy turbine set; It comprises target power acquiring unit, fan condition acquiring unit and power adjustments unit that control and processing unit and difference are electrically connected with it; Wherein, said target power acquiring unit is used to gather the useful horsepower requirements of electrical network to said wind energy turbine set, and its target output Pr as wind energy turbine set is transferred to said control and processing unit; Said fan condition acquiring unit is used to obtain the current real output P of said wind energy turbine set, and transmits it to said control and processing unit; Said control and processing unit comprise data computation module, the power adjustment that said data computation module is calculated said wind energy turbine set according to the current real output P of said wind energy turbine set and target output Pr; Said control and processing unit are confirmed power adjustment strategy based on said power adjustment, and said power adjustment strategy is transferred to said power adjustments unit; And the working state of corresponding blower fan in the said wind energy turbine set is controlled in said power adjustments unit based on said power adjustment strategy.
Wherein, said power adjustment comprises power adjustment numerical value Δ P or power adjustment rate X%, wherein, and said power adjustment numerical value Δ P=Pr-P, said power adjustment rate X%=Δ P/P.
Wherein, Said control and processing unit also comprise data comparison module; Said data comparison module is used for the absolute value with said power adjustment numerical value | and Δ P| compares with preset adjustment threshold value; If the absolute value of said power adjustment numerical value | Δ P| then need to confirm the output power of the said wind energy turbine set of adjustment greater than said preset adjustment threshold value, and confirms result and said power adjustment and confirm corresponding power adjustment strategy based on this; Otherwise, confirm that said power adjustment strategy is not for adjusting the output power of said wind energy turbine set.
Wherein, When said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment; Said power adjustments unit is according to the indication of said control and processing unit, with the unified adjustment of the output power X% of the unit that is incorporated into the power networks in the said wind energy turbine set.
Wherein, When said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment; Said power adjustments unit is according to the indication of said control and processing unit, with the unified adjustment of the output power X% of the limit power unit that has been incorporated into the power networks in the said wind energy turbine set.
Wherein, Said control and processing unit also comprise the unit starting control module; When said power adjustment strategy is positive number for the output power of the said wind energy turbine set of adjustment and said power adjustment rate X%; Said unit starting control module judges whether there is the standby unit in the said wind energy turbine set, if then indicate the corresponding standby unit of said power adjustments unit starting and it is incorporated into the power networks.
Wherein, Said control and processing unit also comprise the compressor emergency shutdown control module; When said power adjustment strategy is negative for the output power of the said wind energy turbine set of adjustment and said power adjustment rate X%; Said compressor emergency shutdown control module judges whether to make the compressor emergency shutdown that has been incorporated into the power networks in the said wind energy turbine set, if then indicate said power adjustments unit to make corresponding blower fan compressor emergency shutdown.
With respect to existing technology, the present invention has following beneficial effect:
At first; In the power regulating method of wind energy turbine set provided by the invention; Because the target output Pr of wind energy turbine set obtains through the useful horsepower requirements of real-time collection electrical network to wind energy turbine set; And the real output Pn that the current total real output P of wind energy turbine set also is based on each blower fan in the wind energy turbine set that collects in real time obtains, and like this, power adjustment that the wind energy turbine set that obtains based on this is required and corresponding power adjustment strategy are according to the practical operation situation of wind energy turbine set inner blower and definite in real time; Therefore; When controlling the working state of corresponding blower fan in the wind energy turbine set according to this power adjustment strategy, just can be in time and adjust the output power of wind energy turbine set exactly, thus the timely output power that makes wind energy turbine set efficiently satisfies the power demand of electrical network.
Secondly; Provide in the power regulating method of wind energy turbine set in the present invention; Through repeating following process: promptly; Gather the power adjustment of the current real output P of wind energy turbine set, calculating wind energy turbine set, the working state of the corresponding blower fan of control; Can be automatically the real output P of wind energy turbine set be controlled gradually and reach target output Pr, real output P and the target output Pr deviation between the two of wind energy turbine set is in the admissible scope gradually, thereby make the output power of wind energy turbine set automatically satisfy the power demand of electrical network.Therefore; The power regulating method of wind energy turbine set provided by the invention need not as existing technology, to carry out power adjustments through a large amount of hand labors; Thereby, adopt the power regulating method of wind energy turbine set provided by the invention, both can save human cost greatly; Can improve again the speed of response of grid power demand and the precision of power adjustments, and then reduce even avoid the loss of wind energy turbine set generated energy.
At last, provide in the power regulating method of wind energy turbine set, according to the actual working state of each blower fan in the wind energy turbine set and its output power is rationally controlled in the present invention; Rather than manual work carries out power control at random, thereby, can be when improving control accuracy and speed of response; Also take into account each blower fan such as actual use condition such as working time or its electric component temperature; Like this, through to rationally the calling of wind energy turbine set inner blower, can avoid blower fan to open continually/stop; And avoid occurring then problem such as long-time standby of other units of the long-time tired operation of some unit; Thereby reduce the rate of fault of blower fan, improve the stability and the Security of fan operation, and then prolong the working life of blower fan.
Similarly; In the PCU Power Conditioning Unit of wind energy turbine set provided by the invention; Since its include the target output Pr that can obtain wind energy turbine set in real time the target power acquiring unit, can obtain the fan condition acquiring unit of the current real output P of wind energy turbine set in real time, confirm control and the processing unit of power adjustment and power adjustment strategy and the power adjustments unit that the working state of corresponding blower fan in the wind energy turbine set is controlled in real time in real time; Therefore; This PCU Power Conditioning Unit has following advantage equally: one of which; Can be in time and adjust the output power of wind energy turbine set exactly, thus in time make the output power of wind energy turbine set satisfy the power demand of electrical network efficiently; They are two years old; When the output power of wind energy turbine set being regulated by means of this PCU Power Conditioning Unit; Both can save human cost greatly, can improve again, and then reduce even avoided the loss of wind energy turbine set generated energy the speed of response of grid power demand and the precision of power adjustments; They are three years old; When the output power of wind energy turbine set being regulated by means of this PCU Power Conditioning Unit; Can be according to the actual working state of each blower fan in the wind energy turbine set and its output power is rationally controlled; Thereby when improving control accuracy and speed of response; Can also take into account the use condition (the for example situation such as temperature of fan operation time or its electric component) of each blower fan, thereby can avoid blower fan to open continually/stop and avoid occurring then problem such as long-time standby of other units of the long-time tired operation of some unit, thereby reduce the rate of fault of blower fan through rational management; Improve the stability and the Security of fan operation, and then can prolong the working life of blower fan.
Description of drawings
The schematic flow sheet of the power regulating method of the wind energy turbine set that Fig. 1 provides for first embodiment of the invention;
The schematic flow sheet of the power regulating method of the wind energy turbine set that Fig. 2 provides for second embodiment of the invention;
The schematic flow sheet of the power regulating method of the wind energy turbine set that Fig. 3 provides for third embodiment of the invention; And
Fig. 4 is the structured flowchart of a specific embodiment of the PCU Power Conditioning Unit of wind energy turbine set provided by the invention.
Embodiment
For making those skilled in the art understand technological scheme of the present invention better, be described in detail below in conjunction with the power regulating method and the PCU Power Conditioning Unit of accompanying drawing to wind energy turbine set provided by the invention.
See also Fig. 1, wherein show the schematic flow sheet of the power regulating method of the wind energy turbine set that first embodiment of the invention provides.
In step 110, gather the useful horsepower requirements of electrical network in real time to wind energy turbine set, and with its desired value as the wind energy turbine set power adjustments, that is, and with its target output Pr as wind energy turbine set.
In step 120, gather the working state of each blower fan in the wind energy turbine set in real time, whether so-called working state comprises: whether start shooting, whether exist fault, be incorporated into the power networks, the active power numerical value of current output etc.Then, according to the active power numerical value Pn of the current output of each blower fan of being incorporated into the power networks, calculate the current real output P of this wind energy turbine set (promptly; The current total effective output of this wind energy turbine set), wherein, P=∑ Pn; N is the numbering of wind turbine unit in this wind energy turbine set; For example, P 1, P2 ... Pn representes the 1st typhoon machine, the 2nd typhoon machine respectively ... N typhoon machine.
In step 130, the power adjustment of calculating wind energy turbine set according to the current real output P of wind energy turbine set and target output Pr.Particularly, this power adjustment can comprise power adjustment numerical value Δ P and power adjustment rate X%.When power adjustment was power adjustment numerical value Δ P, in step 130, real output P and the target output Pr current according to wind energy turbine set obtained power adjustment numerical value Δ P, wherein, and power adjustment numerical value Δ P=Pr-P.When power adjustment is power adjustment rate X%; In step 130; Real output P and the target output Pr current according to wind energy turbine set obtain power adjustment numerical value Δ P, then obtain power adjustment rate X% according to wind energy turbine set current power adjustment numerical value Δ P and real output P again.Wherein, power adjustment numerical value Δ P=Pr-P, power adjustment rate X%=Δ P/P.
In step 140, confirm power adjustment strategy based on above-mentioned power adjustment.So-called power adjustment strategy can comprise whether need regulating, regulate which blower fan, regulative mode and regulate numerical value the output power of wind energy turbine set, wherein regulative mode comprise start blower fan, shutdown, downwards adjust power, adjust upward power etc.For example; In practical application; Can power be adjusted the absolute value of numerical value | Δ P| compares with preset adjustment threshold value; If the absolute value of power adjustment numerical value | Δ P| then need to confirm the output power of the said wind energy turbine set of adjustment greater than preset adjustment threshold value, and confirms result and said power adjustment and the power adjustment strategy formulating numbering, the regulative mode that includes the blower fan unit that is conditioned and regulate information such as numerical value based on this; Otherwise, confirm that power adjustment strategy is not for regulating the output power of wind energy turbine set.
In step 150, control the working state of corresponding blower fan in the wind energy turbine set based on above-mentioned power adjustment strategy.Particularly, when above-mentioned power adjustment strategy is the output power of adjusting wind energy turbine set, the output power of regulating corresponding blower fan in the wind energy turbine set based on above-mentioned power adjustment strategy; When power adjustment strategy be the output power of uncomfortable rectification campaign electric field, then need not to regulate output power and the direct process ends of wind energy turbine set.For example; In practical application; When power adjustment strategy is power adjustment rate X% for the output power of regulating wind energy turbine set and power adjustment; Can the unified adjustment of the output power X% of the unit that is incorporated into the power networks in the wind energy turbine set preferably, can only be adjusted X% with the output power unification of the limit power unit that has been incorporated into the power networks in the wind energy turbine set.
Repeat above-mentioned steps 120 to step 150, satisfy the power demand of electrical network until the output power of wind energy turbine set.Particularly; For the real output P that makes wind energy turbine set can be more near desired target output Pr; After step 150, can forward step 120 again to and regain the real output P of the working state and the wind energy turbine set of each blower fan in the wind energy turbine set; And continued step 130 to step 150 reaches or more near target output Pr in the hope of the real output P that makes wind energy turbine set.
Certainly; In practical application, determining step can also be set between step 130 and step 140; Be used for judging whether the real output P of current wind energy turbine set progressively reaches target output Pr; The perhaps absolute value of the difference of the two | whether Δ P| is in admissible scope, if then need not the output power in the wind energy turbine set to be regulated again; If not, then continue the interior output power of adjustment wind energy turbine set.Like this, through this determining step is set, can start/stop the blower fan unit or the output power of conversion blower fan unit continually continually, thereby can prolong the working life of blower fan.
In addition; When the real output P of wind energy turbine set reaches target output Pr; The perhaps absolute value of the difference of the two | when Δ P| has been in the admissible scope; Can carry out above-mentioned steps 110 again to step 150, the new useful horsepower demand of wind energy turbine set being readjusted the output power in the wind energy turbine set, and the real output P of wind energy turbine set reached or near its new target output Pr according to electrical network.
It is to be noted; In practical application, when power adjustment strategy is positive number for the output power of adjustment wind energy turbine set and power adjustment rate X%, before step 150, can also comprises and judge the step that whether has the standby unit in the wind energy turbine set; And in this step; There is the standby unit in the wind energy turbine set if judge, then starts corresponding standby unit and it is incorporated into the power networks, forward step 120 then to; Otherwise, directly forward step 150 to.Preferably, in this step, if the quantity of the standby unit in the wind energy turbine set, then preferentially starts the long unit of standby time greater than 1.
And; In practical application, when power adjustment strategy is negative for the output power of adjustment wind energy turbine set and power adjustment rate X%, before step 150, can also comprise the step that judges whether to make the compressor emergency shutdown that has been incorporated into the power networks in the wind energy turbine set; And in this step; If judge and need make the compressor emergency shutdown that has been incorporated into the power networks in the wind energy turbine set, then make the corresponding compressor emergency shutdown that has been incorporated into the power networks in the wind energy turbine set, forward step 120 then to; Otherwise, directly forward step 150 to.Preferably, in this step, if the quantity of the standby unit in the wind energy turbine set then preferentially makes the few compressor emergency shutdown of previous shutdown number of times greater than 1.
Further it is to be noted; Transfer the output power unification of blower fan to adjust as power adjustment to waiting in the wind energy turbine set with power adjustment rate X% although in the previous embodiment be; Yet in practical application; Also can directly adopt power adjustment numerical value Δ P to be used as power adjustment, and transfer the output power unification of blower fan to adjust to waiting in the wind energy turbine set, for example with this; Can under the situation that each blower fan rated output power allows, above-mentioned power adjustment numerical value Δ P mean allocation extremely respectively be waited to transfer in the unit.
See also Fig. 2, wherein show the schematic flow sheet of the power regulating method of the wind energy turbine set that second embodiment of the invention provides.In the present embodiment, through the output power that improves wind energy turbine set the real output of wind energy turbine set is reached perhaps near target output.
Particularly, in step 210, gather the useful horsepower requirements of electrical network in real time, and with its desired value as the wind energy turbine set power adjustments to wind energy turbine set, that is, with it as wind energy turbine set target output Pr.
In step 220, gather the working state of each blower fan in the wind energy turbine set in real time, whether so-called working state comprises: whether start shooting, whether exist fault, be incorporated into the power networks, the active power numerical value of current output etc.Then, the active power numerical value Pn according to the current output of each blower fan that has been incorporated into the power networks calculates the current real output P of this wind energy turbine set, and wherein, P=∑ Pn, n are the numbering of wind turbine unit in this wind energy turbine set.
In step 230,, calculate the required power adjustment numerical value Δ P of this wind energy turbine set according to this wind energy turbine set current target output power Pr and real output P.Wherein, this power adjustment numerical value can be the two poor of target output Pr and real output P, that is, and and Δ P=Pr-P.
In step 240; Judge the absolute value of power adjustment numerical value | whether Δ P| greater than preset adjustment threshold value,, judges that power adjusts the absolute value of numerical value that is | and whether Δ P| exceeds the two the allowed band of difference of real output P and target output Pr; If; Then forward step 260 to, that is, power adjustment this moment strategy is the output power of this wind energy turbine set of adjustment; If not, then forward directly method ends of step 250 to, and need not to adjust the output power of wind energy turbine set, that is, power adjustment this moment strategy is the output power of uncomfortable rectification campaign electric field.Wherein, preset adjustment threshold value can require to preestablish according to actual conditions or electrical network, for example can preestablish this adjustment threshold value according to the previous experience value.
In step 260, judged whether the standby unit, if then forward step 270 to; If not, then forward step 280 to.
In step 270, start corresponding standby unit and it is incorporated into the power networks, then forward step 220 to, with the working state that regains each blower fan in the current wind energy turbine set and the real output P of wind energy turbine set.In practical application, if the quantity of the standby unit in this wind energy turbine set, then preferentially starts the long unit of standby time greater than 1, to avoid some unit the problem of equipment operation functional deterioration appears because of long-time standby.
In step 280, obtain power adjustment rate X% according to above-mentioned power adjustment numerical value Δ P and real output P, wherein, X%=Δ P/P.
In step 290, the output power unification of the unit that is incorporated into the power networks in the wind energy turbine set is adjusted upward X%.In practical application, in order fast and effeciently to promote the output power of wind energy turbine set, the output power unification of the limit power unit that has been incorporated into the power networks that can be only that this wind energy turbine set is interior adjusts upward X%.
After step 290; The flow process of this method can come back to step 220 again, and the interval certain hour, for example 10 seconds; Regain the working state of each blower fan in the current wind energy turbine set and the real output P of wind energy turbine set; And continued step 230 to step 290 reaches target output Pr until the real output P that makes wind energy turbine set, and real output P and the target output Pr deviation between the two of wind energy turbine set is in the admissible scope.So circulation is until the power demand that satisfies electrical network.
It is to be noted; Although in the present embodiment; Preferentially when available standby unit is arranged in the wind energy turbine set start the standby unit, and the output powers that only all start the back electrical network that finishes at available standby unit are called limit power unit when still failing to reach the electrical network demand again; Yet in practical application, be not limited thereto; But also can adopt in such a way; Promptly; The first output power of the current unit that has been incorporated into the power networks in the adjustment wind energy turbine set, and only in wind energy turbine set, during the output power adjusted of the current unit that has been incorporated into the power networks to its maximum output, just start the interior available standby unit of this wind energy turbine set.
It is pointed out that further that in practical application after the execution of step 270, this method flow process also can directly forward step 290 to, and the unit that directly will just be incorporated into the power networks this moment together raises X% in company with the unit that before has been incorporated into the power networks.
See also Fig. 3, wherein show the schematic flow sheet of the power regulating method of the wind energy turbine set that third embodiment of the invention provides.In the present embodiment, through the output power that reduces wind energy turbine set the real output of wind energy turbine set is reached perhaps near target output.
Particularly, in step 310, gather the useful horsepower requirements of electrical network in real time to wind energy turbine set, and with its target output Pr as wind energy turbine set.
In step 320, gather the working state of each blower fan in the wind energy turbine set in real time, whether so-called working state comprises: whether start shooting, whether exist fault, be incorporated into the power networks, the active power numerical value of current output etc.Then, according to the active power numerical value Pn of the current output of each blower fan of being incorporated into the power networks, calculate the current real output P of this wind energy turbine set, wherein, P=∑ Pn, n are the numbering of wind turbine unit in this wind energy turbine set.
In step 330,, calculate the required power adjustment numerical value Δ P of this wind energy turbine set according to this wind energy turbine set current target output power Pr and real output P.Wherein, this power adjustment numerical value can be the two poor of target output Pr and real output P, that is, and and Δ P=Pr-P.
In step 340; Judge the absolute value of power adjustment numerical value | whether Δ P| greater than preset adjustment threshold value,, judges that power adjusts the absolute value of numerical value that is | and whether Δ P| exceeds the allowed band of real output P and target output Pr deviation between the two; If; Then forward step 360 to, that is, power adjustment this moment strategy is the output power of this wind energy turbine set of adjustment; If not, then forward directly method ends of step 350 to, and need not to adjust the output power of wind energy turbine set, that is, power adjustment this moment strategy is the output power of uncomfortable rectification campaign electric field.
In step 360, judge whether to make the compressor emergency shutdown that has been incorporated into the power networks, if then forward step 390 to; If not, then forward step 370 to.
In step 370, obtain power adjustment rate X% according to above-mentioned power adjustment numerical value Δ P and real output P, wherein, X%=Δ P/P.
In step 380, with the unified adjustment downwards of the output power of the unit that is incorporated into the power networks in the wind energy turbine set | X%|.
In step 390, make the corresponding compressor emergency shutdown that has been incorporated into the power networks in the wind energy turbine set.In practical application, preferentially make and shut down the few compressor emergency shutdown of number of times.
After execution of step 380 or the step 390; The flow process of this method can come back to step 320 again; With the working state that regains each blower fan in the current wind energy turbine set and the real output P of wind energy turbine set; And continued step 330 to step 390 reaches target output Pr until the real output P that makes wind energy turbine set, and real output P and the target output Pr deviation between the two of wind energy turbine set is in the scope of permission.And; After the real output P of wind energy turbine set reaches target output Pr; After perhaps the deviation between the two was in the scope of permission, the flow process of this method can forward step 310 to, and gathers the useful horsepower requirements of current electrical network to wind energy turbine set again; Then again execution in step 320 to step 390, so that the real output of wind energy turbine set satisfies the power demand of current electrical network.
As another technological scheme, the present invention also provides a kind of PCU Power Conditioning Unit of wind energy turbine set, and it comprises target power acquiring unit, fan condition acquiring unit and power adjustments unit that control and processing unit and difference are electrically connected with it.Wherein, the target power acquiring unit is used to obtain the target output Pr of wind energy turbine set, and transmits it to control and processing unit; The fan condition acquiring unit is used to obtain the current total effective output value P of wind energy turbine set, and transmits it to control and processing unit; Control and processing unit are used for the power adjustment according to current total effective output value P of wind energy turbine set and target output Pr calculating wind energy turbine set; And confirm power adjustment strategy based on this power adjustment, then power is adjusted strategy and transfer to the power adjustments unit; The output power of corresponding blower fan in this wind energy turbine set is controlled in the power adjustments unit based on this power adjustment strategy.
See also Fig. 4, wherein show the PCU Power Conditioning Unit that specific embodiment of the present invention provides.This PCU Power Conditioning Unit comprises target power acquiring unit 410, fan condition acquiring unit 420 and the power adjustments unit 440 that control and processing unit 430 and difference are electrically connected with it.
Wherein, target power acquiring unit 410 is used to gather the useful horsepower requirements of electrical network to wind energy turbine set, and its target output Pr as wind energy turbine set is transferred to control and processing unit 430.
Fan condition acquiring unit 420 is used for gathering in real time the working state of each blower fan in the wind energy turbine set, and transmits it to control and processing unit 430.Whether so-called working state comprises: whether start shooting, whether exist fault, be incorporated into the power networks, the active power numerical value of current output etc.Then, this fan condition acquiring unit 420 calculates current total effective output value in this wind energy turbine set according to the active power numerical value Pn of the current output of each blower fan that has been incorporated into the power networks; That is, the real output P that this wind energy turbine set is current, wherein; P=∑ Pn, n are the numbering of each unit in this wind energy turbine set, for example; P1, P2 ... Pn representes the 1st typhoon machine, the 2nd typhoon machine respectively ... N typhoon machine.
Control and processing unit 430 comprise data computation module; Real output P and target output Pr that this data computation module is current according to wind energy turbine set; Calculate the power adjustment of wind energy turbine set; And confirm corresponding power adjustment strategy based on this power adjustment, then just corresponding power adjustment strategy transfers to power adjustments unit 440.So-called power adjustment can comprise power adjustment numerical value Δ P or power adjustment rate X%, wherein, and power adjustment numerical value Δ P=Pr-P, power adjustment rate X%=Δ P/P.So-called power adjustment strategy comprises whether need regulating, regulate which blower fan, regulative mode and regulate numerical value the output power of wind energy turbine set, wherein regulative mode comprise start blower fan, shutdown, downwards adjust power, adjust upward power etc.
The output power of corresponding blower fan in this wind energy turbine set is controlled in power adjustments unit 440 based on above-mentioned power adjustment strategy.When power adjustment strategy is power adjustment rate X% for the output power of adjustment wind energy turbine set and power adjustment; This power adjustments unit 440 is according to the indication of control and processing unit 430, with the unified adjustment of the output power X% of the unit that is incorporated into the power networks in this wind energy turbine set.Particularly, when X% is positive number, the output power unification of the unit that is incorporated into the power networks in the wind energy turbine set is adjusted upward X%; When X% is negative, with the unified adjustment downwards of the output power of the unit that is incorporated into the power networks in the wind energy turbine set | X%|.And; In practical application; When power adjustment strategy is power adjustment rate X% for the output power of adjustment wind energy turbine set and power adjustment; In order fast and effeciently to promote the output power of wind energy turbine set, power adjustments unit 440 is according to the indication of control and processing unit 430, can be only the output power unification of the limit power unit that has been incorporated into the power networks in this wind energy turbine set be adjusted upward X%.
In addition, in order to control the output power of wind energy turbine set more efficiently, this control and processing unit 430 can also comprise data comparison module, unit starting control module and compressor emergency shutdown control module.
Wherein, Data comparison module is adjusted power the absolute value of numerical value | and Δ P| compares with preset adjustment threshold value; If the absolute value of power adjustment numerical value | Δ P| is greater than preset adjustment threshold value; The output power that then confirm to need the adjustment wind energy turbine set, and confirm result and power adjustment and confirm corresponding power adjustment strategy based on this; Otherwise, confirm that power adjustment strategy is the output power of uncomfortable rectification campaign electric field.Like this; Work compound by means of this data comparison module, control and processing unit 430 and power adjustments unit 440; Can be only at the absolute value of power adjustment numerical value | Δ P| just carries out power adjustments during greater than preset adjustment threshold value; And need not to start continually/stop the blower fan unit or the output power of conversion blower fan unit continually, thereby can prolong the working life of blower fan.
The unit starting control module is used for judging whether there is the standby unit in this wind energy turbine set at X% during for positive number, if then indicated power regulon 440 work promptly, start corresponding standby unit and it is incorporated into the power networks.When in the unit starting control module is judged this wind energy turbine set, having many standby units, then indicated power regulon 440 preferentially starts the long units of standby times, thereby can avoid some unit the problem of equipment operation functional deterioration to occur because of standby always.
The compressor emergency shutdown control module is used for judging whether to make the compressor emergency shutdown that has been incorporated into the power networks in the wind energy turbine set during for negative at X%, if, then indicated power regulon 440 work, that is, and with corresponding compressor emergency shutdown.The quantity of the unit that is incorporated into the power networks in the compressor emergency shutdown control module is judged this wind energy turbine set is greater than 1; Then indicated power regulon 440 preferentially makes the few compressor emergency shutdown of previous shutdown number of times, thereby can avoid some unit to cause the tired and final problem that influences working life of equipment because of being in running state for a long time.
It is to be noted; In aforementioned each embodiment; So-called limit power unit refers to the unit that in the unit that has been incorporated into the power networks, can improve its output power through set pitch control, just refer to output power greater than predetermined meritorious output power reference value P0 the unit less than its peak output.Wherein, the concrete value of this meritorious output power reference value P0 is by the rated power and the residing wind-resources environment decision of unit of unit.For example; For golden wind 1.5MW unit, can rule of thumb preestablish this meritorious output power reference value P0 is 500kW, at this moment; For this model unit, the unit less than its peak output promptly defines the power unit that exceeds to its meritorious output power greater than 500kW.Be appreciated that; This moment, wind energy turbine set possibly can exist the odjective causes such as wind-resources because of the present position to cause the unit of meritorious output power less than 500kW equally; Promptly; This wind energy turbine set possibly exist the unit that can not improve its output power through set pitch control, therefore in order fast and effeciently to adjust the output power of wind energy turbine set, can only adjust the unit of the limit power that has been incorporated into the power networks in this wind energy turbine set.
It is pointed out that further above mode of execution only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For the one of ordinary skilled in the art, under the situation that does not break away from spirit of the present invention and essence, can make various modification and improvement, these modification also are regarded as protection scope of the present invention with improving.
Claims (15)
1. the power regulating method of a wind energy turbine set is characterized in that comprising the steps:
1) gather the useful horsepower requirements of electrical network in real time to said wind energy turbine set, and with its target output Pr as wind energy turbine set;
2) obtain the current real output P of said wind energy turbine set;
3) real output P and the target output Pr current according to said wind energy turbine set calculates the power adjustment of said wind energy turbine set;
4) confirm power adjustment strategy based on said power adjustment;
5) control the working state of corresponding blower fan in the said wind energy turbine set based on said power adjustment strategy;
Repeat above-mentioned steps 2) to step 5), satisfy the power demand of electrical network until the output power of said wind energy turbine set.
2. the power regulating method of wind energy turbine set according to claim 1; It is characterized in that; Said power adjustment comprises power adjustment numerical value Δ P, and in said step 3), real output P and the target output Pr current according to said wind energy turbine set obtain said power adjustment numerical value Δ P; Wherein, said power adjustment numerical value Δ P=Pr-P.
3. the power regulating method of wind energy turbine set according to claim 1; It is characterized in that; Said power adjustment comprises power adjustment rate X%, and in said step 3), real output P and the target output Pr current according to said wind energy turbine set obtain said power adjustment numerical value Δ P; Then obtain said power adjustment rate X% according to said wind energy turbine set current power adjustment numerical value Δ P and real output P again; Wherein, said power adjustment numerical value Δ P=Pr-P, said power adjustment rate X%=Δ P/P.
4. according to the power regulating method of claim 2 or 3 described wind energy turbine set; It is characterized in that; In said step 4), with the absolute value of said power adjustment numerical value | Δ P| compares with preset adjustment threshold value, if the absolute value of said power adjustment numerical value | Δ P| is greater than preset adjustment threshold value; The output power that then confirm to need the said wind energy turbine set of adjustment, and confirm result and said power adjustment and confirm corresponding power adjustment strategy based on this; Otherwise, confirm that said power adjustment strategy is an output power of not adjusting said wind energy turbine set, and
In said step 5), when said power adjustment strategy is the output power of the said wind energy turbine set of adjustment, adjust the output power of corresponding blower fan in the said wind energy turbine set based on said power adjustment strategy; When said power adjustment strategy when not adjusting the output power of said wind energy turbine set, need not to adjust output power and the direct process ends of said wind energy turbine set.
5. the power regulating method of wind energy turbine set according to claim 4; It is characterized in that; When said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment; In said step 5), with the unified adjustment of the output power X% of the unit that is incorporated into the power networks in the said wind energy turbine set.
6. the power regulating method of wind energy turbine set according to claim 5; It is characterized in that; When said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment; In said step 5), only with the unified X% that adjusts of the output power of the limit power unit that has been incorporated into the power networks in the said wind energy turbine set.
7. the power regulating method of wind energy turbine set according to claim 4; It is characterized in that; When said power adjustment strategy is positive number for the output power of the said wind energy turbine set of adjustment and power adjustment rate X%, before said step 5), also comprise step 45): judge whether there is the standby unit in the said wind energy turbine set, if; Then start corresponding standby unit and it is incorporated into the power networks, forward step 2 then to); If not, then directly forward step 5) to.
8. the power regulating method of wind energy turbine set according to claim 4; It is characterized in that; When said power adjustment strategy is negative for the output power of the said wind energy turbine set of adjustment and power adjustment rate X%, before said step 5), also comprise step 46): judge whether to make the compressor emergency shutdown that has been incorporated into the power networks in the said wind energy turbine set, if; Then make corresponding blower fan compressor emergency shutdown, forward step 2 then to); If not, then directly forward step 5) to.
9. the PCU Power Conditioning Unit of a wind energy turbine set is characterized in that comprising: control and processing unit and the target power acquiring unit, fan condition acquiring unit and the power adjustments unit that are electrically connected with it respectively, wherein
Said target power acquiring unit is used to gather the useful horsepower requirements of electrical network to said wind energy turbine set, and its target output Pr as wind energy turbine set is transferred to said control and processing unit;
Said fan condition acquiring unit is used to obtain the current real output P of said wind energy turbine set, and transmits it to said control and processing unit;
Said control and processing unit comprise data computation module, the power adjustment that said data computation module is calculated said wind energy turbine set according to the current real output P of said wind energy turbine set and target output Pr; Said control and processing unit are confirmed power adjustment strategy based on said power adjustment, and said power adjustment strategy is transferred to said power adjustments unit;
The working state of corresponding blower fan in the said wind energy turbine set is controlled in said power adjustments unit based on said power adjustment strategy.
10. the PCU Power Conditioning Unit of wind energy turbine set according to claim 9; It is characterized in that said power adjustment comprises power adjustment numerical value Δ P or power adjustment rate X%, wherein; Said power adjustment numerical value Δ P=Pr-P, said power adjustment rate X%=Δ P/P.
11. the PCU Power Conditioning Unit of wind energy turbine set according to claim 10; It is characterized in that; Said control and processing unit also comprise data comparison module; Said data comparison module is used for the absolute value with said power adjustment numerical value | and Δ P| compares with preset adjustment threshold value; If the absolute value of said power adjustment numerical value | Δ P| then need to confirm the output power of the said wind energy turbine set of adjustment greater than said preset adjustment threshold value, and confirms result and said power adjustment and confirm corresponding power adjustment strategy based on this; Otherwise, confirm that said power adjustment strategy is not for adjusting the output power of said wind energy turbine set.
12. the PCU Power Conditioning Unit of wind energy turbine set according to claim 10; It is characterized in that; When said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment; Said power adjustments unit is according to the indication of said control and processing unit, with the unified adjustment of the output power X% of the unit that is incorporated into the power networks in the said wind energy turbine set.
13. the PCU Power Conditioning Unit of wind energy turbine set according to claim 12; It is characterized in that; When said power adjustment strategy is power adjustment rate X% for the output power of the said wind energy turbine set of adjustment and said power adjustment; Said power adjustments unit is according to the indication of said control and processing unit, with the unified adjustment of the output power X% of the limit power unit that has been incorporated into the power networks in the said wind energy turbine set.
14. the PCU Power Conditioning Unit of wind energy turbine set according to claim 10; It is characterized in that; Said control and processing unit also comprise the unit starting control module, and when said power adjustment strategy was positive number for the output power of the said wind energy turbine set of adjustment and said power adjustment rate X%, said unit starting control module judged whether there is the standby unit in the said wind energy turbine set; If then indicate the corresponding standby unit of said power adjustments unit starting and it be incorporated into the power networks.
15. the PCU Power Conditioning Unit of wind energy turbine set according to claim 10; It is characterized in that; Said control and processing unit also comprise the compressor emergency shutdown control module, and when said power adjustment strategy was negative for the output power of the said wind energy turbine set of adjustment and said power adjustment rate X%, said compressor emergency shutdown control module judged whether to make the compressor emergency shutdown that has been incorporated into the power networks in the said wind energy turbine set; If then indicate said power adjustments unit to make corresponding blower fan compressor emergency shutdown.
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