CN103490445B - The simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines and method - Google Patents
The simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines and method Download PDFInfo
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Abstract
The invention provides simulation model and the method for the medium-term and long-term meritorious cooperation control of a kind of Wind turbines, simulation model comprises the input signal receiver module, signal behavior processing module, working point determination module and the selection Executive Module that connect successively; The scheduling arrangement of Wind turbines that input signal receiver module receives input is exerted oneself Plan Curve and AGC real-time monitoring command signal; The target that signal behavior receiver module obtains Wind turbines is exerted oneself; The target of working point determination module determination Wind turbines is exerted oneself corresponding rotating speed; Select the operation area of Executive Module determination Wind turbines, select to carry out award setting or active power controller to Wind turbines.Model provided by the invention and method, can reflect that the electric power system of Wind turbines active participate is gained merit, the adjustment of frequency, and coordinate AGC and operation plan to exert oneself to carry out the process of peak regulation, for research Wind turbines grid-connected after dynamic behaviour foundation is provided.
Description
Technical field
The present invention relates to electric system simulation modeling field, be specifically related to simulation model and the method for the medium-term and long-term meritorious cooperation control of a kind of Wind turbines.
Background technology
In recent years, being constructed and put into operation of numerous large-scale wind electricity base, large-scale wind power is incorporated into the power networks, while bringing great economic benefit, have also been changed original power supply architecture, wind-powered electricity generation is also increasing on the impact of electrical network, is no longer confined to affect idle, voltage of some areas electrical network etc., but rises to and affect bulk power grid frequency stabilization, active balance etc.Therefore, electrical network is had higher requirement to the problem such as real power control, peak regulation, frequency modulation after large-scale wind power access.
The active power controller of wind-powered electricity generation has clear and definite requirement: the necessary tool active power regulation ability of wind energy turbine set, and can control the output of its active power according to dispatching of power netwoks departmental instruction; Require that wind energy turbine set installs meritorious power control system simultaneously, can a receiving scheduling department distant place send meritorious go out force control signal automatically performing, limit wind energy turbine set peak power output and power variation rate with this.And blower fan producer, traffic department etc. also develop the real power control of Wind turbines and the cooperation control ability of AGC and improve, present wind energy turbine set has possessed certain meritorious ability of regulation and control, and can with electrical network AGC and dispatch scheme of arrangement and match, the demand such as frequency modulation, peak regulation of active response system.
In Practical Project, when the dynamic behaviour of large-scale wind power field access electrical network is carried out simulation calculation and analyzed, still lack the model that active power controls automatically and wind energy turbine set matches with electrical network AGC of corresponding Wind turbines.Simulation calculation only rests on the fluctuation of simulation wind power output to the impact of electrical network, and the behavior of wind-powered electricity generation self in fault transient process, and the requirement can not exerted oneself to Wind turbines according to scheduling scheme of arrangement and automatic real power control, the response process of wind-powered electricity generation in long period yardstick is simulated out.Existing research also mainly concentrates on the randomness of wind-powered electricity generation and fluctuation to the impact of access electrical network, and the control method for coordinating of Wind turbines and AGC, dispatches the aspects such as the strategy that arranges wind power output and wind energy turbine set AGC Controlling model.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, there is provided a kind of simulation model and the method that are applicable to the medium-term and long-term meritorious cooperation control of Wind turbines, simulation model comprises the input signal receiver module, signal behavior processing module, working point determination module and the selection Executive Module that connect successively;
The scheduling arrangement that described input signal receiver module receives the Wind turbines of input is exerted oneself Plan Curve and AGC real-time monitoring command signal;
Described signal behavior receiver module to be exerted oneself P according to exert oneself target that Plan Curve or described AGC real-time monitoring command signal obtain described Wind turbines of described scheduling arrangement
i;
According to the operation characteristic P-ω curve of described Wind turbines, described working point determination module determines that the target of described Wind turbines is exerted oneself P
icorresponding rotational speed omega
i;
Described selection Executive Module to be exerted oneself P according to the target of described Wind turbines
iand rotational speed omega
idetermine the operation area of described Wind turbines, select to carry out award setting or active power controller to described Wind turbines according to the operation area of described Wind turbines.
In first preferred embodiment provided by the invention: the Plan Curve of exerting oneself of the scheduling arrangement of described Wind turbines is according to current Operation of Wind Power Plant by traffic department, in conjunction with wind power prediction and load prediction situation, the wind power output curve within following a period of time of formulation;
Exerting oneself of described scheduling arrangement comprises the fixing long-term arrangement plan of exerting oneself and the plan of exerting oneself of variable short term scheduling in the works;
Plan Curve form of exerting oneself described in formulating comprises: segmentation ramp function, sinusoidal wave function or both resultant curves and discrete single-point form;
Described AGC real-time monitoring command signal comprises: in electrical network, AGC is by the skew of detection of grid frequency, automatically carries out the signal of real-time monitoring to conventional power unit and exerting oneself of wind-powered electricity generation.
In second preferred embodiment provided by the invention: described signal behavior receiver module comprises the switching value K be connected with the plan power curve signal of input
1and with the switching value K that is connected of AGC real-time monitoring command signal of input
2;
Described signal behavior receiver module to be exerted oneself P according to exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain described Wind turbines of described scheduling arrangement
imethod be:
K is set
1k when=1
2=0 or K
1k when=0
2=1 two kind of situation, by exporting P
i=K
1* P
j+ K
2* P
athe target obtaining described Wind turbines is exerted oneself P
ifor the target of the described scheduling arrangement plan of exerting oneself is exerted oneself P
jor the target in the instruction of described AGC real-time monitoring is exerted oneself P
a.
In 3rd preferred embodiment provided by the invention: described signal behavior receiver module to be exerted oneself P to described target
isetting amplitude limit value, the upper limit P of setting
maxfor the specified active power of described Wind turbines, lower limit P
minit is the minimum load of 0 or dispatching of power netwoks service requirement.
In 4th preferred embodiment provided by the invention: the operation area of described Wind turbines comprises: start district, maximal power point tracking district, Heng Zhuansuqu and invariable power district;
According to described active-power P
iand the rotational speed omega of correspondence
i, judge that the method for the operation area of described Wind turbines is:
When not reaching rated speed, described Wind turbines is in maximal power point tracking district;
When rotating speed reaches rated speed, and when power does not reach rated power, described Wind turbines is in Heng Zhuansuqu;
Described selection Executive Module selects one in award setting module or active power controller module two to control described Wind turbines, reaches the object of described Wind turbines being carried out to award setting or active power controller;
Described selection Executive Module comprises the switching value K be connected with award setting module
3and the switching value K to be connected with active power controller module
4, the operation area selection according to described Wind turbines to the method that described Wind turbines carries out award setting or active power controller is:
If described Wind turbines is in described maximal power point tracking district, by switching value K
3be set to 0, K
4be set to 1, select Wind turbines described in described active power controller module controls;
If described Wind turbines is in described Heng Zhuansuqu, by switching value K
3be set to 1, K
4be set to 0, select Wind turbines described in described award setting module controls.
In 5th preferred embodiment provided by the invention: when described Wind turbines is in described maximal power point tracking district, corresponding rotational speed omega that described Wind turbines target is exerted oneself
ias rotating speed of target ω
x, by the change regulating the rotating speed of described Wind turbines to control power, make described Wind turbines rotating speed according to described rotating speed of target ω
xchange;
When described Wind turbines is in described permanent rotating speed district, by the change regulating propeller pitch angle to control power, maintain invariablenes turning speed, regulable control amount is meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), wherein P
0for meritorious reference value.
The invention provides the emulation mode of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines, comprising:
Step S1, the scheduling arrangement of Wind turbines receiving input is exerted oneself Plan Curve and AGC real-time monitoring command signal, to be exerted oneself P by exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain described Wind turbines of described scheduling arrangement
i;
According to the operation characteristic P-ω curve of Wind turbines, step S2, determines that the target of described Wind turbines is exerted oneself P
icorresponding rotational speed omega
i;
Step S3, to exert oneself P according to the target of described Wind turbines
iand rotational speed omega
idetermine the operation area of described Wind turbines, select to carry out award setting or active power controller to described Wind turbines according to the operation area of described Wind turbines
In 7th preferred embodiment provided by the invention: in described step S1, the Plan Curve of exerting oneself of the scheduling arrangement of described Wind turbines is according to current Operation of Wind Power Plant by traffic department, in conjunction with wind power prediction and load prediction situation, the wind power output curve within following a period of time of formulation;
Exerting oneself of described scheduling arrangement comprises the fixing long-term arrangement plan of exerting oneself and the plan of exerting oneself of variable short term scheduling in the works;
Plan Curve form of exerting oneself described in formulating comprises: segmentation ramp function, sinusoidal wave function or both resultant curves and discrete single-point form;
Described AGC real-time monitoring command signal comprises: in electrical network, AGC is by the skew of detection of grid frequency, automatically carries out the signal of real-time monitoring to conventional power unit and exerting oneself of wind-powered electricity generation;
Artificial selection to be exerted oneself P by exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain described Wind turbines of scheduling arrangement as required
i, the target of the described Wind turbines obtained is exerted oneself P
ithe target of Wind turbines for the described scheduling arrangement plan of exerting oneself is exerted oneself P
jor the target of the Wind turbines in the instruction of described AGC real-time monitoring is exerted oneself P
a.
In 8th preferred embodiment provided by the invention: also comprise in described step S1 and described target is exerted oneself P
isetting amplitude limit value, the upper limit P of setting
maxfor the specified active power of Wind turbines, lower limit P
minit is the minimum load of 0 or dispatching of power netwoks service requirement.
In 9th preferred embodiment provided by the invention: the operation area of Wind turbines described in described step S3 comprises starts district, maximal power point tracking district, Heng Zhuansuqu and invariable power district;
According to active-power P in described step S3
iand the rotational speed omega of correspondence
i, judge that the method for the operation area of this Wind turbines is:
When not reaching rated speed, described Wind turbines is in maximal power point tracking district;
When rotating speed reaches rated speed, and when power does not reach rated power, described Wind turbines is in Heng Zhuansuqu;
Operation area selection according to described Wind turbines in described step S3 to the method that described Wind turbines carries out award setting or active power controller is:
When described Wind turbines is in maximal power point tracking district, corresponding rotating speed of described Wind turbines target being exerted oneself, as rotating speed of target, by the change regulating the rotating speed of described Wind turbines to control power, makes Wind turbines rotating speed according to desired value ω
xchange, ω
x=ω
i.
When described Wind turbines is in permanent rotating speed district, by the change regulating propeller pitch angle to control power, maintain invariablenes turning speed, regulable control amount is meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), wherein P
0for meritorious reference value.
The medium-term and long-term simulation model of meritorious cooperation control of a kind of Wind turbines provided by the invention and the beneficial effect of method comprise:
1, the simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines provided by the invention and method, for in prior art, the randomness of wind energy turbine set and fluctuation are mainly concentrated on the impact of electrical network to the emulation of wind-powered electricity generation, lack the meritorious cooperation control emulation to separate unit Wind turbines, the simulation model providing a kind of Wind turbines to gain merit cooperation control and method, the plan of exerting oneself of scheduling arrangement and the instruction of AGC real-time monitoring are obtained the objective plan value of Wind turbines with the use of selection, the rotating speed of control Wind turbines and propeller pitch angle is selected to realize meritorious adjustment of exerting oneself according to the objective plan value of this Wind turbines, meritorious the exerting oneself of Wind turbines is changed according to set power target preferably.Can reflect that the electric power system of Wind turbines active participate is gained merit, the adjustment of frequency, and coordinate AGC and operation plan to exert oneself to carry out the process of peak regulation, for research Wind turbines grid-connected after the foundation that provides of dynamic behaviour.
2, this simulation model and method are specially adapted to the medium-term and long-term meritorious cooperation control of Wind turbines, and its time scale longer (generally several minutes to several hours), can reflect the change procedure at a slow speed of the Rapid Variable Design that Wind turbines is exerted oneself and long period; The transient process that time scale is shorter also supported by model simultaneously.
3, simple, the general module of simulation model achieves the input of model, synthesis, judgement, selection, the process such as set and output, can the needs of, scheduling requirement actual according to engineering and research neatly, objective definition power curve, controls the active power of Wind turbines by set object variations.
4, in the emulation to Wind turbines real power control process, using the requirement of blower fan self-operating characteristic and electrical network as restrictive condition, emulation is made to reflect operation and the regulation and control situation of Wind turbines in Practical Project more realistically.
Accompanying drawing explanation
Be illustrated in figure 1 the structural representation of the simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines provided by the invention;
Be illustrated in figure 2 the structural representation of the embodiment of the simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines provided by the invention;
Be illustrated in figure 3 the different curve of cyclical fluctuations simulation drawings of the scheduling arrangement plan of exerting oneself;
Be illustrated in figure 4 the operation area schematic diagram of variable speed constant frequency Wind turbines about P-v;
Be illustrated in figure 5 the operation area schematic diagram of variable speed constant frequency Wind turbines about P-ω;
Be illustrated in figure 6 the deviation delta P that will gain merit
xcontrolled quentity controlled variable outputs to the schematic diagram of the embodiment of award setting module;
Be illustrated in figure 7 rotating speed definite value ω
xcontrolled quentity controlled variable output to the schematic diagram of the embodiment of active power controller module;
Be illustrated in figure 8 the flow chart of the emulation mode that the invention provides the medium-term and long-term meritorious cooperation control of a kind of Wind turbines.
Embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is described in further detail below.
The invention provides simulation model and the method for the medium-term and long-term meritorious cooperation control of a kind of Wind turbines, the structural representation of simulation model as shown in Figure 1, as shown in Figure 1, this simulation model comprises the input signal receiver module, signal behavior processing module, working point determination module and the selection Executive Module that connect successively.
The scheduling arrangement of this Wind turbines that input signal receiver module receives input is exerted oneself Plan Curve and AGC real-time monitoring command signal.
Signal behavior receiver module to be exerted oneself P according to exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain Wind turbines of scheduling arrangement
i, the result of this selection can artificially be arranged as required.
According to the operation characteristic P-ω curve of this Wind turbines, working point determination module determines that the target of this Wind turbines is exerted oneself P
icorresponding rotational speed omega
i.
Executive Module is selected to exert oneself P according to the target of Wind turbines
iand rotational speed omega
idetermine the operation area of this Wind turbines, select to carry out award setting or active power controller to this Wind turbines according to the operation area of Wind turbines.
Embodiment one:
Embodiment one provided by the invention is the embodiment of the simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines, is illustrated in figure 2 the structural representation of the embodiment of the simulation model of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines provided by the invention.
In this embodiment one, the Plan Curve of exerting oneself receiving the scheduling arrangement of the Wind turbines of input is according to current Operation of Wind Power Plant (comprise wind speed, Wind turbines is exerted oneself) by traffic department, and in conjunction with wind power prediction and load prediction situation, formulate the wind power output curve within following a period of time, this scheduling arrangement is exerted oneself and had both been comprised the fixing long-term arrangement plan of exerting oneself (with wind power output yearly plan and daily planning for reference) in the works, comprises again the plan of exerting oneself of variable short term scheduling.The Plan Curve form of exerting oneself of this formulation as shown in Figure 3, comprising: segmentation ramp function, sinusoidal wave function or both resultant curves; Also have discrete single-point form in addition, namely specify the concrete numerical value that different time points is exerted oneself.
In addition, be applicable to the time of long term dynamics emulation generally at several minutes to several hours, the emulation longer for time scale is not generally considered, therefore the scheduling scheme of arrangement used is exerted oneself also should not specify oversize time range, the reference (dotted line see in Fig. 3) of the plan of therefore exerting oneself in the year of wind-powered electricity generation and a daily output plan plan of exerting oneself with making dispositions.
And AGC real-time monitoring command signal comprises: in electrical network, AGC is by the skew of detection of grid frequency, automatically carries out the signal of real-time monitoring to conventional power unit and exerting oneself of wind-powered electricity generation.In existing long term dynamics simulated program, establish practical AGC model, the input variable of cooperation control simulation model of the AGC command signal of analogue simulation can being gained merit as Wind turbines.
The scheduling arrangement received according to input signal receiver module is exerted oneself Plan Curve and AGC real-time monitoring command signal, can obtain dispatching arranging the target of the Wind turbines of the plan of exerting oneself to exert oneself P
jto exert oneself P with the target of the Wind turbines in the instruction of AGC real-time monitoring
a.
Signal behavior receiver module comprises the switching value K be connected with the plan power curve signal of input
1and with the switching value K that is connected of AGC real-time monitoring command signal of input
2.Signal behavior receiver module to be exerted oneself P according to exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain Wind turbines of scheduling arrangement
imethod be:
K is set
1k when=1
2=0 or K
1k when=0
2=1 two kind of situation, by exporting P
i=K
1* P
j+ K
2* P
athe target obtaining this Wind turbines is exerted oneself P
ifor the target of the scheduling arrangement plan of exerting oneself is exerted oneself P
jor the target in the instruction of AGC real-time monitoring is exerted oneself P
a.
Preferably, because Wind turbines long-time running is below rated power, and be subject to the impact of wind speed, operation of power networks state and scheduling requirement, this signal behavior receiver module can also to be exerted oneself P to target
isetting amplitude limit value, the upper limit P of its setting
maxfor the specified active power of Wind turbines, lower limit P
minit is the minimum load of 0 or dispatching of power netwoks service requirement.
Each Wind turbines has respective operation characteristic P-ω curve, and this P-ω curve can obtain from the dispatch from the factory data of parameter or running of Wind turbines itself.
Working point determination module to be exerted oneself P to target
ip-ω curve finds corresponding rotational speed omega
i, thus determine the running status of Wind turbines, the operation area namely residing for it.Be respectively the operation area schematic diagram of variable speed constant frequency Wind turbines about P-v and P-ω as shown in Figure 4 and Figure 5, from Fig. 4 and Fig. 5, the running status of variable speed constant frequency Wind turbines is divided into four regions to implement to control: start district, maximal power point tracking district, Heng Zhuansuqu and invariable power district.
In Fig. 4 and Fig. 5, AB section starts district, by the rotating speed of Variable Pitch regulating and controlling unit, makes it keep constant or change in a scope allowed, carrying out and net operation when stator voltage meets grid-connected conditions; And DE Duan Shi invariable power district, Wind turbines reaches rated power, is in permanent rotating speed output-constant operation state, and the P-ω curve of Fig. 5 shows as same operating point D, E.These two regions control the change of Wind turbines rotating speed and power, so do not consider owing to cannot exert oneself according to target.
According to the rotating speed of active power and correspondence thereof, judgement is not when reaching rated speed, and Wind turbines is in maximal power point tracking district, i.e. BC section, Wind turbines fixed-pitch variable speed runs, and corresponding rotating speed of therefore target can being exerted oneself, as rotating speed of target, controls the change of Wind turbines rotating speed; When rotating speed reaches rated speed, and when power does not reach rated power, Wind turbines is in Heng Zhuansuqu, i.e. CD section, and Wind turbines is fixed on Variable Pitch on maximum (top) speed and runs, the change therefore can exerted oneself by award setting system fading margin Wind turbines.
Select Executive Module to select one in award setting module or active power controller module two to control Wind turbines, reach the object of Wind turbines being carried out to award setting or active power controller.Concrete, select Executive Module to comprise the switching value K be connected with award setting module
3and the switching value K to be connected with active power controller module
4:
If Wind turbines is in maximal power point tracking district, be determine pitch, variable speed running status, control system keeps propeller pitch angle constant, by the change regulating the rotating speed of unit to control power, therefore selects active power controller module, now by switching value K
3be set to 0, K
4be set to 1;
If Wind turbines is in Heng Zhuansuqu, Wind turbines reaches maximum speed, regulates propeller pitch angle to control the change of power, maintains invariablenes turning speed, therefore select award setting module, now by switching value K by control system
3be set to 1, K
4be set to 0.
The real power control Executive Module selected is different, and the controlled quentity controlled variable that its model needs is also different.If select award setting module, it controls the controlled quentity controlled variable of meritorious change for meritorious deviation delta P
x, calculate Δ P
x=K
3* (P
i-P
0), wherein P
0for meritorious reference value; If select active power controller module, its controlled quentity controlled variable is rotating speed definite value ω
x, make rotating speed according to set object variations, calculate ω
x=K
4* ω
i.
When controlled quentity controlled variable being outputted to corresponding award setting module or active power controller module, should be noted the decanting point of this module controls amount, determined by concrete model, be respectively meritorious deviation delta P as shown in Figure 6 and Figure 7
xor rotating speed definite value ω
xcontrolled quentity controlled variable output to the schematic diagram of the embodiment of award setting module or active power controller module.
In addition, when processing input signal, target is exerted oneself P
ibe through the value after amplitude limit, may gap be had with initial scheduling scheme of arrangement and AGC command signal, therefore need target to exert oneself P
iwith AGC command signal P
adeviation delta P
a=P
i-P
aretrieval system, revises next step instruction in order to AGC.
The invention provides the emulation mode of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines, be illustrated in figure 8 the flow chart of the method, as shown in Figure 8, the method comprises:
Step S1, the scheduling arrangement of Wind turbines receiving input is exerted oneself Plan Curve and AGC real-time monitoring command signal, to be exerted oneself P by exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain this Wind turbines of this scheduling arrangement
i.
According to the operation characteristic P-ω curve of Wind turbines, step S2, determines that the target of this Wind turbines is exerted oneself P
icorresponding rotational speed omega
i.
Step S3, to exert oneself P according to the target of Wind turbines
iand rotational speed omega
idetermine the operation area of this Wind turbines, select to carry out award setting or active power controller to this Wind turbines according to the operation area of this Wind turbines.
Embodiment two:
Embodiment two provided by the invention is the embodiment of the emulation mode of the medium-term and long-term meritorious cooperation control of a kind of Wind turbines, in this embodiment two, scheduling arrangement in step S1 Plan Curve of exerting oneself is according to current Operation of Wind Power Plant (comprise wind speed, Wind turbines is exerted oneself) by scheduling portion, and in conjunction with wind power prediction and load prediction situation, formulate the wind power output curve within following a period of time.This scheduling arrangement is exerted oneself and is comprised fixing long-term arrangement in the works and to exert oneself (with wind power output yearly plan and daily planning for reference) and variable short term scheduling plan.Dispatch the form arranging to exert oneself Plan Curve and comprise segmentation ramp function, sinusoidal wave function or both resultant curves and discrete single-point form.
AGC real-time monitoring command signal in step S1 comprises: in electrical network, AGC is by the skew of detection of grid frequency, automatically carries out the signal of real-time monitoring to conventional power unit and exerting oneself of wind-powered electricity generation.
Can artificially select as required in step S1 to be exerted oneself P by exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain this Wind turbines of scheduling arrangement
i, the target of the Wind turbines obtained is exerted oneself P
ithe target of Wind turbines for the plan of exerting oneself of scheduling arrangement is exerted oneself P
jor the target of the Wind turbines in the instruction of AGC real-time monitoring is exerted oneself P
a.
Preferably, can also to exert oneself P to target in step S1
isetting amplitude limit value, the upper limit P of its setting
maxfor the specified active power of Wind turbines, lower limit P
minit is the minimum load of 0 or dispatching of power netwoks service requirement.
In step S3, the operation area of Wind turbines comprises starting district, maximal power point tracking district, Heng Zhuansuqu and invariable power district.
According to active-power P in step S3
iand the rotational speed omega of correspondence
i, judge that the method for the operation area of this Wind turbines is:
When not reaching rated speed, Wind turbines is in maximal power point tracking district;
When rotating speed reaches rated speed, and when power does not reach rated power, Wind turbines is in Heng Zhuansuqu.
Operation area selection according to this Wind turbines in step S3 to the method that this Wind turbines carries out award setting or active power controller is:
When Wind turbines is in maximal power point tracking district, corresponding rotating speed of Wind turbines target being exerted oneself, as rotating speed of target, is controlled the change of power, makes Wind turbines rotating speed according to desired value ω by the rotating speed of regulating wind power unit
xchange, ω
x=ω
i.
When Wind turbines is in permanent rotating speed district, by the change regulating propeller pitch angle to control power, maintain invariablenes turning speed, regulable control amount is meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), wherein P
0for meritorious reference value.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. a simulation model for the medium-term and long-term meritorious cooperation control of Wind turbines, is characterized in that, described simulation model comprises the input signal receiver module, signal behavior processing module, working point determination module and the selection Executive Module that connect successively;
The scheduling arrangement that described input signal receiver module receives the Wind turbines of input is exerted oneself Plan Curve and AGC real-time monitoring command signal;
Described signal behavior processing module to be exerted oneself P according to exert oneself target that Plan Curve or described AGC real-time monitoring command signal obtain described Wind turbines of described scheduling arrangement
i;
According to the operation characteristic P-ω curve of described Wind turbines, described working point determination module determines that the target of described Wind turbines is exerted oneself P
icorresponding rotational speed omega
i;
Described selection Executive Module to be exerted oneself P according to the target of described Wind turbines
iand rotational speed omega
idetermine the operation area of described Wind turbines, select to carry out award setting or active power controller to described Wind turbines according to the operation area of described Wind turbines;
The operation area of described Wind turbines comprises: start district, maximal power point tracking district, Heng Zhuansuqu and invariable power district;
To exert oneself P according to the target of described Wind turbines
iand the rotational speed omega of correspondence
i, judge that the method for the operation area of described Wind turbines is:
When not reaching rated speed, described Wind turbines is in maximal power point tracking district;
When rotating speed reaches rated speed, and when power does not reach rated power, described Wind turbines is in Heng Zhuansuqu;
Described selection Executive Module selects one in award setting module or active power controller module two to control described Wind turbines, reaches the object of described Wind turbines being carried out to award setting or active power controller;
Described selection Executive Module comprises the switching value K be connected with award setting module
3and the switching value K to be connected with active power controller module
4, the operation area selection according to described Wind turbines to the method that described Wind turbines carries out award setting or active power controller is:
If described Wind turbines is in described maximal power point tracking district, by switching value K
3be set to 0, K
4be set to 1, select Wind turbines described in described active power controller module controls;
If described Wind turbines is in described Heng Zhuansuqu, by switching value K
3be set to 1, K
4be set to 0, select Wind turbines described in described award setting module controls;
When described Wind turbines is in described maximal power point tracking district, corresponding rotational speed omega that described Wind turbines target is exerted oneself
ias rotating speed of target ω
x, by the change regulating the rotating speed of described Wind turbines to control power, make described Wind turbines rotating speed according to described rotating speed of target ω
xchange;
When described Wind turbines is in described permanent rotating speed district, by the change regulating propeller pitch angle to control power, maintain invariablenes turning speed, regulable control amount is meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), wherein P
0for meritorious reference value.
2. simulation model as claimed in claim 1, it is characterized in that, the Plan Curve of exerting oneself of the scheduling arrangement of described Wind turbines is by traffic department according to current Operation of Wind Power Plant, in conjunction with wind power prediction and load prediction situation, and the wind power output curve within following a period of time of formulation;
Exerting oneself of described scheduling arrangement comprises the fixing long-term arrangement plan of exerting oneself and the plan of exerting oneself of variable short term scheduling in the works;
Plan Curve form of exerting oneself described in formulating comprises: segmentation ramp function, sinusoidal wave function or both resultant curves and discrete single-point form;
Described AGC real-time monitoring command signal comprises: in electrical network, AGC is by the skew of detection of grid frequency, automatically carries out the signal of real-time monitoring to conventional power unit and exerting oneself of wind-powered electricity generation.
3. simulation model as claimed in claim 1, is characterized in that, described signal behavior processing module comprises the switching value K be connected with the Plan Curve signal of exerting oneself of input
1and with the switching value K that is connected of AGC real-time monitoring command signal of input
2;
Described signal behavior processing module to be exerted oneself P according to exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain described Wind turbines of described scheduling arrangement
imethod be:
K is set
1k when=1
2=0 or K
1k when=0
2=1 two kind of situation, by exporting P
i=K
1* P
j+ K
2* P
athe target obtaining described Wind turbines is exerted oneself P
ifor the target of the described scheduling arrangement plan of exerting oneself is exerted oneself P
jor the target in the instruction of described AGC real-time monitoring is exerted oneself P
a.
4. simulation model as claimed in claim 1, is characterized in that, described signal behavior processing module to be exerted oneself P to described target
isetting amplitude limit value, the upper limit P of setting
maxfor the specified active power of described Wind turbines, lower limit P
minit is the minimum load of 0 or dispatching of power netwoks service requirement.
5. an emulation mode for the medium-term and long-term meritorious cooperation control of Wind turbines, it is characterized in that, described emulation mode comprises:
Step S1, the scheduling arrangement of Wind turbines receiving input is exerted oneself Plan Curve and AGC real-time monitoring command signal, to be exerted oneself P by exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain described Wind turbines of described scheduling arrangement
i;
According to the operation characteristic P-ω curve of Wind turbines, step S2, determines that the target of described Wind turbines is exerted oneself P
icorresponding rotational speed omega
i;
Step S3, to exert oneself P according to the target of described Wind turbines
iand rotational speed omega
idetermine the operation area of described Wind turbines, select to carry out award setting or active power controller to described Wind turbines according to the operation area of described Wind turbines;
The operation area of Wind turbines described in described step S3 comprises starts district, maximal power point tracking district, Heng Zhuansuqu and invariable power district;
To exert oneself P according to the target of Wind turbines in described step S3
iand the rotational speed omega of correspondence
i, judge that the method for the operation area of this Wind turbines is:
When not reaching rated speed, described Wind turbines is in maximal power point tracking district;
When rotating speed reaches rated speed, and when power does not reach rated power, described Wind turbines is in Heng Zhuansuqu;
Operation area selection according to described Wind turbines in described step S3 to the method that described Wind turbines carries out award setting or active power controller is:
When described Wind turbines is in maximal power point tracking district, corresponding rotating speed of described Wind turbines target being exerted oneself, as rotating speed of target, by the change regulating the rotating speed of described Wind turbines to control power, makes Wind turbines rotating speed according to desired value ω
xchange, ω
x=ω
i;
When described Wind turbines is in permanent rotating speed district, by the change regulating propeller pitch angle to control power, maintain invariablenes turning speed, regulable control amount is meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), wherein P
0for meritorious reference value, K
3for the switching value be connected with award setting module.
6. emulation mode as claimed in claim 5, is characterized in that,
In described step S1, the Plan Curve of exerting oneself of the scheduling arrangement of described Wind turbines is by traffic department according to current Operation of Wind Power Plant, in conjunction with wind power prediction and load prediction situation, and the wind power output curve within following a period of time of formulation;
Exerting oneself of described scheduling arrangement comprises the fixing long-term arrangement plan of exerting oneself and the plan of exerting oneself of variable short term scheduling in the works;
Plan Curve form of exerting oneself described in formulating comprises: segmentation ramp function, sinusoidal wave function or both resultant curves and discrete single-point form;
Described AGC real-time monitoring command signal comprises: in electrical network, AGC is by the skew of detection of grid frequency, automatically carries out the signal of real-time monitoring to conventional power unit and exerting oneself of wind-powered electricity generation;
Artificial selection to be exerted oneself P by exert oneself target that Plan Curve or AGC real-time monitoring command signal obtain described Wind turbines of scheduling arrangement as required
i, the target of the described Wind turbines obtained is exerted oneself P
ithe target of Wind turbines for the described scheduling arrangement plan of exerting oneself is exerted oneself P
jor the target of the Wind turbines in the instruction of described AGC real-time monitoring is exerted oneself P
a.
7. emulation mode as claimed in claim 5, is characterized in that, also comprises and exert oneself P to described target in described step S1
isetting amplitude limit value, the upper limit P of setting
maxfor the specified active power of Wind turbines, lower limit P
minit is the minimum load of 0 or dispatching of power netwoks service requirement.
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| 风电场有功优化及控制策略研究;徐世昱;《中国优秀硕士学位论文全文库》;20130215;第11、19、32、33、40页 * |
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