CN103490445A - Simulation model and method of long-term active power coordination control in wind generation set - Google Patents
Simulation model and method of long-term active power coordination control in wind generation set Download PDFInfo
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- CN103490445A CN103490445A CN201310400618.2A CN201310400618A CN103490445A CN 103490445 A CN103490445 A CN 103490445A CN 201310400618 A CN201310400618 A CN 201310400618A CN 103490445 A CN103490445 A CN 103490445A
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Abstract
The invention provides a simulation model and a method of long-term active power coordination control in a wind generation set. The simulation model comprises an input signal receiving module, a signal selection processing module, a working point determining module and a selection executing module, wherein the input signal receiving module, the signal selection processing module, the working point determining module and the selection executing module are connected in sequence. The input signal receiving module receives the input planning curve of scheduling and AGC real-time regulation command signals of the wind generation set, the signal selection processing module obtains the target output of the wind generation set, the working point determining module determines the rotating speed corresponding to the target output of the wind generation set, and the selection executing module determines the operation area of the wind generation set and makes a choice of carrying out pitch angle control or active power control over the wind generation set. The simulation model and the method of the long-term active power coordination control in the wind generation set can reflect the fact that the wind generation set actively participates in the adjustment of a power system in the active power and the frequency, and carries out peak adjustment by matching with AGC and scheduling output, and provides the basis for researching the dynamic behavior of the wind generation set after grid connection.
Description
Technical field
The present invention relates to electric system simulation modeling field, be specifically related to simulation model and method that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit is controlled.
Background technology
In recent years, being constructed and put into operation of numerous large-scale wind electricities base, large-scale wind power is incorporated into the power networks, when bringing great economic benefit, also changed original power supply architecture, wind-powered electricity generation is also increasing on the impact of electrical network, no longer is confined to affect idle, the voltage of some areas electrical network etc., but rise to that the large mains frequency of impact is stable, active balance etc.Therefore, electrical network is had higher requirement to problems such as the real power control after large-scale wind power access, peak regulation, frequency modulation.
The active power of wind-powered electricity generation is controlled clear and definite requirement: wind energy turbine set must have merit power adjustments ability, and can control its active power output according to the dispatching of power netwoks departmental instruction; Require wind energy turbine set that meritorious power control system is installed, what can a receiving scheduling department distant place send meritoriously goes out force control signal and automatically performs, and with this, limits wind energy turbine set peak power output and power variation rate simultaneously.And blower fan producer, traffic department etc. also develop and improve the real power control of wind-powered electricity generation unit and the coordination control ability of AGC, wind energy turbine set has possessed certain meritorious ability of regulation and control now, and can match with electrical network AGC and scheduling scheme of arrangement, the demands such as the frequency modulation of active response system, peak regulation.
In Practical Project, when the dynamic behaviour of large-scale wind power field access electrical network is carried out to simulation calculation and analysis, still lack the automatic control of active power of corresponding wind-powered electricity generation unit and the model that wind energy turbine set matches with electrical network AGC.Simulation calculation only rests on the impact of the simulation wind-powered electricity generation fluctuation of exerting oneself on electrical network, and the behavior of wind-powered electricity generation self in fault transient process, and can not, according to dispatching scheme of arrangement and automatic real power control to the requirement of wind-powered electricity generation unit output, the response process of wind-powered electricity generation in the long period yardstick be simulated out.Existing research also mainly concentrates on the impact on the access electrical network of the randomness of wind-powered electricity generation and fluctuation, and the control method for coordinating of wind-powered electricity generation unit and AGC, scheduling arrange the aspects such as strategy that wind-powered electricity generation exerts oneself and wind energy turbine set AGC control model.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of simulation model and method that the medium-term and long-term meritorious coordination of wind-powered electricity generation unit is controlled that be applicable to is provided, and simulation model comprises input signal receiver module, signal selection processing module, the operating point determination module connected successively and selects Executive Module;
The scheduling arrangement that described input signal receiver module receives the wind-powered electricity generation unit of input exert oneself Plan Curve and AGC real-time monitoring command signal;
Described signal selective reception module is according to described scheduling arrangement target that Plan Curve or described AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself
i;
Described operating point determination module is determined the target of the described wind-powered electricity generation unit P that exerts oneself according to the operation characteristic P-ω curve of described wind-powered electricity generation unit
icorresponding rotational speed omega
i;
Described selection Executive Module is according to the target of the described wind-powered electricity generation unit P that exerts oneself
iand rotational speed omega
idetermine the operation area of described wind-powered electricity generation unit, select described wind-powered electricity generation unit is carried out to propeller pitch angle control or active power control according to the operation area of described wind-powered electricity generation unit.
In the first preferred embodiment provided by the invention: the Plan Curve of exerting oneself of the scheduling arrangement of described wind-powered electricity generation unit is according to current Operation of Wind Power Plant by traffic department, in conjunction with wind power prediction and load prediction situation, the wind-powered electricity generation power 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;
The described Plan Curve form of exerting oneself of 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, by the skew of detection of grid frequency, carries out the signal of real-time monitoring automatically to exerting oneself of conventional unit and wind-powered electricity generation.
In the second preferred embodiment provided by the invention: described signal selective reception module comprises the switching value K be connected with the plan power curve signal of input
1with the switching value K that is connected of AGC real-time monitoring command signal with input
2;
Described signal selective reception module is according to described scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself
imethod be:
K is set
1=1 o'clock K
2=0 or K
1=0 o'clock K
2=1 two kind of situation, by output P
i=K
1* P
j+ K
2* P
athe target that the obtains described wind-powered electricity generation unit P that exerts oneself
ithe target P that exerts oneself for the described scheduling arrangement plan of exerting oneself
jor the P that exerts oneself of the target in the instruction of described AGC real-time monitoring
a.
In the 3rd preferred embodiment provided by the invention: described signal selective reception module is to the described target P that exerts oneself
iset amplitude limit value, the upper limit P of setting
maxfor the specified active power of described wind-powered electricity generation unit, lower limit P
minbe 0 or the minimum load of dispatching of power netwoks service requirement.
In the 4th preferred embodiment provided by the invention: the operation area of described wind-powered electricity generation unit comprises: starting district, maximal wind-energy tracing Area, Heng Zhuansuqu and Heng Gongshuaiqu;
According to described active-power P
iand corresponding rotational speed omega
i, judge that the method for the operation area of described wind-powered electricity generation unit is:
When not reaching rated speed, described wind-powered electricity generation unit is in the maximal wind-energy tracing Area;
When rotating speed reaches rated speed, and power is not while reaching rated power, and described wind-powered electricity generation unit is in Heng Zhuansuqu;
Described selection Executive Module selects in two of propeller pitch angle control module or active power control modules to be controlled described wind-powered electricity generation unit, reaches described wind-powered electricity generation unit is carried out to the purpose that propeller pitch angle control or active power are controlled;
Described selection Executive Module comprises the switching value K be connected with the propeller pitch angle control module
3with the switching value K be connected with the active power control module
4, according to the operation area of described wind-powered electricity generation unit, select the method for described wind-powered electricity generation unit being carried out to propeller pitch angle control or active power control to be:
If described wind-powered electricity generation unit is in described maximal wind-energy tracing Area, by switching value K
3be set to 0, K
4be set to 1, select described active power control module to control described wind-powered electricity generation unit;
If described wind-powered electricity generation unit is in described Heng Zhuansuqu, by switching value K
3be set to 1, K
4be set to 0, select described propeller pitch angle control module to control described wind-powered electricity generation unit.
In the 5th preferred embodiment provided by the invention: described wind-powered electricity generation unit is when described maximal wind-energy tracing Area, by the described wind-powered electricity generation unit target corresponding rotational speed omega of exerting oneself
ias rotating speed of target ω
x, carry out the variation of power ratio control by the rotating speed of regulating described wind-powered electricity generation unit, make described wind-powered electricity generation generating unit speed according to described rotating speed of target ω
xchange;
Described wind-powered electricity generation unit, when described permanent rotating speed district, carrys out the variation of power ratio control by regulating propeller pitch angle, maintain invariablenes turning speed, regulates controlled quentity controlled variable for meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), P wherein
0for meritorious reference value.
The invention provides the emulation mode that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit is controlled, comprising:
Step S1, the scheduling arrangement that receives the wind-powered electricity generation unit of input exert oneself Plan Curve and AGC real-time monitoring command signal, by described scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself
i;
Step S2, determine the target of the described wind-powered electricity generation unit P that exerts oneself according to the operation characteristic P-ω curve of wind-powered electricity generation unit
icorresponding rotational speed omega
i;
Step S3, according to the target of the described wind-powered electricity generation unit P that exerts oneself
iand rotational speed omega
idetermine the operation area of described wind-powered electricity generation unit, select described wind-powered electricity generation unit is carried out to propeller pitch angle control or active power control according to the operation area of described wind-powered electricity generation unit
In the 7th preferred embodiment provided by the invention: in described step S1, the Plan Curve of exerting oneself of the scheduling arrangement of described wind-powered electricity generation unit is according to current Operation of Wind Power Plant by traffic department, in conjunction with wind power prediction and load prediction situation, the wind-powered electricity generation power 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;
The described Plan Curve form of exerting oneself of 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, by the skew of detection of grid frequency, carries out the signal of real-time monitoring automatically to exerting oneself of conventional unit and wind-powered electricity generation;
The artificial selection by scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself as required
i, the target of the described wind-powered electricity generation unit the obtained P that exerts oneself
ifor the target of wind-powered electricity generation unit of the described scheduling arrangement plan of the exerting oneself P that exerts oneself
jthe perhaps target of the wind-powered electricity generation unit in the instruction of the described AGC real-time monitoring P that exerts oneself
a.
In the 8th preferred embodiment provided by the invention: also comprise in described step S1 the described target P that exerts oneself
iset amplitude limit value, the upper limit P of setting
maxfor the specified active power of wind-powered electricity generation unit, lower limit P
minbe 0 or the minimum load of dispatching of power netwoks service requirement.
In the 9th preferred embodiment provided by the invention: the operation area of wind-powered electricity generation unit described in described step S3 comprises starting district, maximal wind-energy tracing Area, Heng Zhuansuqu and Heng Gongshuaiqu;
In described step S3 according to active-power P
iand corresponding rotational speed omega
i, judge that the method for the operation area of this wind-powered electricity generation unit is:
When not reaching rated speed, described wind-powered electricity generation unit is in the maximal wind-energy tracing Area;
When rotating speed reaches rated speed, and power is not while reaching rated power, and described wind-powered electricity generation unit is in Heng Zhuansuqu;
In described step S3, according to the operation area of described wind-powered electricity generation unit, select the method for described wind-powered electricity generation unit being carried out to propeller pitch angle control or active power control to be:
Described wind-powered electricity generation unit, when the maximal wind-energy tracing Area, is exerted oneself corresponding rotating speed as rotating speed of target using described wind-powered electricity generation unit target, carrys out the variation of power ratio control by the rotating speed of regulating described wind-powered electricity generation unit, makes the wind-powered electricity generation generating unit speed according to desired value ω
xchange ω
x=ω
i.
Described wind-powered electricity generation unit, when permanent rotating speed district, carrys out the variation of power ratio control by regulating propeller pitch angle, maintain invariablenes turning speed, regulates controlled quentity controlled variable for meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), P wherein
0for meritorious reference value.
The simulation model that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit provided by the invention is controlled and the beneficial effect of method comprise:
1, simulation model and method that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit provided by the invention is controlled, for in prior art, the emulation of wind-powered electricity generation mainly being concentrated on to the impact on electrical network of the randomness of wind energy turbine set and fluctuation, lack the meritorious coordination of separate unit wind-powered electricity generation unit is controlled to emulation, provide a kind of wind-powered electricity generation unit meritorious simulation model and the method controlled coordinated, the plan of exerting oneself of scheduling arrangement and the instruction of AGC real-time monitoring are used in conjunction with to the objective plan value of selecting to obtain the wind-powered electricity generation unit, according to the objective plan value of this wind-powered electricity generation unit, select rotating speed and the propeller pitch angle of controlling the wind-powered electricity generation unit to realize meritorious adjusting of exerting oneself, meritorious the exerting oneself of wind-powered electricity generation unit changed according to set power target preferably.Can reflect that the wind-powered electricity generation unit initiatively participates in that electric power system is meritorious, the adjustment of frequency, and coordinate AGC and operation plan to exert oneself to carry out the process of peak regulation, the foundation provided for the dynamic behaviour after research wind-powered electricity generation set grid-connection.
2, this simulation model and method are specially adapted to the medium-term and long-term meritorious coordination control of wind-powered electricity generation unit, and its time yardstick long (general several minutes to several hours), can reflect the quick variation of wind-powered electricity generation unit output and the change procedure at a slow speed of long period; Model is also supported the transient process that time scale is shorter simultaneously.
3, simulation model has been realized the processes such as the input of model, synthetic, judgement, selection, set and output by simple, general module, the needs that can require and study according to engineering reality, scheduling neatly, the objective definition power curve, control the active power of wind-powered electricity generation unit by set object variations.
4,, in the emulation to wind-powered electricity generation unit real power control process, using the requirement of blower fan self-operating characteristic and electrical network as restrictive condition, emulation is reflected more realistically operation and the regulation and control situation of Practical Project apoplexy group of motors.
The accompanying drawing explanation
Be illustrated in figure 1 the structural representation of the simulation model of the medium-term and long-term meritorious coordination control of a kind of wind-powered electricity generation unit provided by the invention;
Be illustrated in figure 2 the structural representation of the embodiment of the simulation model that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit provided by the invention controls;
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-powered electricity generation unit about P-v;
Be illustrated in figure 5 the operation area schematic diagram of variable speed constant frequency wind-powered electricity generation unit 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 propeller pitch angle control 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 control module;
Be illustrated in figure 8 the flow chart of the emulation mode that the invention provides the medium-term and long-term meritorious coordination control of a kind of wind-powered electricity generation unit.
Embodiment
Below with reference to the accompanying drawings the specific embodiment of the present invention is described in further detail.
The invention provides simulation model and method that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit is controlled, the structural representation of simulation model as shown in Figure 1, as shown in Figure 1, this simulation model comprises input signal receiver module, signal selection processing module, the operating point determination module connected successively and selects Executive Module.
The scheduling arrangement that the input signal receiver module receives this wind-powered electricity generation unit of input exert oneself Plan Curve and AGC real-time monitoring command signal.
Signal selective reception module is according to scheduling target that Plan Curve or AGC real-time monitoring command signal obtain the wind-powered electricity generation unit P that exerts oneself that arranges to exert oneself
i, the result of this selection can artificially arrange as required.
The operating point determination module is determined the target of this wind-powered electricity generation unit P that exerts oneself according to the operation characteristic P-ω curve of this wind-powered electricity generation unit
icorresponding rotational speed omega
i.
Select Executive Module according to the target of the wind-powered electricity generation unit P that exerts oneself
iand rotational speed omega
idetermine the operation area of this wind-powered electricity generation unit, select this wind-powered electricity generation unit is carried out to propeller pitch angle control or active power control according to the operation area of wind-powered electricity generation unit.
Embodiment mono-:
The embodiment that embodiment mono-provided by the invention is the simulation model controlled of the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit, be illustrated in figure 2 the structural representation of the embodiment of the simulation model that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit provided by the invention controls.
In this embodiment mono-, the Plan Curve of exerting oneself that receives the scheduling arrangement of the wind-powered electricity generation unit of inputting is according to current Operation of Wind Power Plant (comprising wind speed, wind-powered electricity generation unit output etc.) by traffic department, and in conjunction with wind power prediction and load prediction situation, the wind-powered electricity generation power curve of formulation within following a period of time, this scheduling arrangement is exerted oneself and had both been comprised in the works exerting oneself plan of fixing long-term arrangement (wind-powered electricity generation of take exert oneself yearly plan and daily planning be reference), 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 has in addition discrete single-point form, the concrete numerical value of specifying different time points to exert 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 of using is exerted oneself and also should not be stipulated oversize time range, so the plan of exerting oneself in the year of wind-powered electricity generation and the only reference (seeing the dotted line in Fig. 3) of the plan of exerting oneself with making dispositions of daily output plan.
And AGC real-time monitoring command signal comprises: in electrical network, AGC, by the skew of detection of grid frequency, carries out the signal of real-time monitoring automatically to exerting oneself of conventional unit and wind-powered electricity generation.In existing long term dynamics simulated program, set up practical AGC model, can gain merit the AGC command signal of analogue simulation as the wind-powered electricity generation unit and coordinate to control the input variable of simulation model.
The scheduling arrangement received according to the input signal receiver module exert oneself Plan Curve and AGC real-time monitoring command signal, the target that can obtain the wind-powered electricity generation unit of the scheduling arrangement plan of the exerting oneself P that exerts oneself
jwith the target of wind-powered electricity generation unit in the instruction of the AGC real-time monitoring P that exerts oneself
a.
Signal selective reception module comprises the switching value K be connected with the plan power curve signal of input
1with the switching value K that is connected of AGC real-time monitoring command signal with input
2.Signal selective reception module is according to scheduling target that Plan Curve or AGC real-time monitoring command signal obtain the wind-powered electricity generation unit P that exerts oneself that arranges to exert oneself
imethod be:
K is set
1=1 o'clock K
2=0 or K
1=0 o'clock K
2=1 two kind of situation, by output P
i=K
1* P
j+ K
2* P
athe target that obtains this wind-powered electricity generation unit P that exerts oneself
ifor scheduling arranges the target of the plan of the exerting oneself P that exerts oneself
jor the P that exerts oneself of the target in the instruction of AGC real-time monitoring
a.
Preferably, because the wind turbine group leader phase operates in below rated power, and be subject to the impact that wind speed, operation of power networks state and scheduling require, this signal selective reception module can also be to the target P that exerts oneself
iset amplitude limit value, the upper limit P of its setting
maxfor the specified active power of wind-powered electricity generation unit, lower limit P
minbe 0 or the minimum load of dispatching of power netwoks service requirement.
Each wind-powered electricity generation unit has operation characteristic P-ω curve separately, and this P-ω curve can obtain from the dispatch from the factory data of parameter or running of wind-powered electricity generation unit itself.
The operating point determination module is to the target P that exerts oneself
ifind corresponding rotational speed omega on P-ω curve
ithereby, the running status of definite wind-powered electricity generation unit, i.e. its residing operation area.Be respectively as shown in Figure 4 and Figure 5 the operation area schematic diagram of variable speed constant frequency wind-powered electricity generation unit about P-v and P-ω, from Fig. 4 and Fig. 5, the running status of variable speed constant frequency wind-powered electricity generation unit is divided into four zones and implements to control: starting district, maximal wind-energy tracing Area, Heng Zhuansuqu and Heng Gongshuaiqu.
In Fig. 4 and Fig. 5, the AB section is the starting district, by the rotating speed of Variable Pitch regulating and controlling unit, makes it keep constant or change in the scope of a permission, when stator voltage meets grid-connected condition, carries out and net operation; And the DE section is Heng Gongshuaiqu, the wind-powered electricity generation unit reaches rated power, in permanent rotating speed output-constant operation state, on the P-of Fig. 5 ω curve, shows as same operating point D, E.These two zones are owing to exerting oneself and control the variation of wind-powered electricity generation generating unit speed and power according to target, so do not consider.
According to active power and corresponding rotating speed thereof, judgement is not when reaching rated speed, and the wind-powered electricity generation unit is in the maximal wind-energy tracing Area, it is the BC section, the operation of wind-powered electricity generation unit fixed-pitch variable speed, therefore can exert oneself target corresponding rotating speed as rotating speed of target, controls the variation of wind-powered electricity generation generating unit speed; When rotating speed reaches rated speed, and power is not while reaching rated power, and the wind-powered electricity generation unit is in Heng Zhuansuqu, i.e. CD section, and the wind-powered electricity generation unit is fixed on Variable Pitch operation on maximum (top) speed, therefore can pass through the variation of propeller pitch angle control system regulating wind power unit output.
Select Executive Module to select one in two of propeller pitch angle control module or active power control modules to be controlled the wind-powered electricity generation unit, reach the wind-powered electricity generation unit is carried out to the purpose that propeller pitch angle control or active power are controlled.Concrete, select Executive Module to comprise the switching value K be connected with the propeller pitch angle control module
3with the switching value K be connected with the active power control module
4:
If the wind-powered electricity generation unit in the maximal wind-energy tracing Area, is to determine pitch, variable speed running status, control system keeps propeller pitch angle constant, carrys out the variation of power ratio control by the rotating speed of regulating unit, therefore selects the active power control module, now by switching value K
3be set to 0, K
4be set to 1;
If the wind-powered electricity generation unit is in Heng Zhuansuqu, the wind-powered electricity generation unit has reached maximum speed, by control system, regulates the variation that propeller pitch angle carrys out power ratio control, maintains invariablenes turning speed, therefore selects the propeller pitch angle control module, now by switching value K
3be set to 1, K
4be set to 0.
The real power control Executive Module difference of selecting, the controlled quentity controlled variable that its model needs is also different.If select the propeller pitch angle control module, it controls the meritorious controlled quentity controlled variable changed for meritorious deviation delta P
x, calculate Δ P
x=K
3* (P
i-P
0), P wherein
0for meritorious reference value; If select the active power control 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 is outputed to corresponding propeller pitch angle control module or active power control module, should be noted the decanting point of this module controls amount, determined by concrete model, be respectively as shown in Figure 6 and Figure 7 meritorious deviation delta P
xor rotating speed definite value ω
xcontrolled quentity controlled variable output to the schematic diagram of the embodiment of propeller pitch angle control module or active power control module.
In addition, when processing input signal, the target P that exerts oneself
ibe the value after amplitude limit, with initial scheduling scheme of arrangement and AGC command signal, gap may be arranged, P therefore need to exert oneself target
iwith AGC command signal P
adeviation delta P
a=P
i-P
aretrieval system, revised next step instruction in order to AGC.
The invention provides the emulation mode that the medium-term and long-term meritorious coordination of a kind of wind-powered electricity generation unit is controlled, be illustrated in figure 8 the flow chart of the method, as shown in Figure 8, the method comprises:
Step S1, the scheduling arrangement that receives the wind-powered electricity generation unit of input exert oneself Plan Curve and AGC real-time monitoring command signal, by this scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal obtain this wind-powered electricity generation unit P that exerts oneself that exerts oneself
i.
Step S2, determine the target of this wind-powered electricity generation unit P that exerts oneself according to the operation characteristic P-ω curve of wind-powered electricity generation unit
icorresponding rotational speed omega
i.
Step S3, according to the target of the wind-powered electricity generation unit P that exerts oneself
iand rotational speed omega
idetermine the operation area of this wind-powered electricity generation unit, select this wind-powered electricity generation unit is carried out to propeller pitch angle control or active power control according to the operation area of this wind-powered electricity generation unit.
Embodiment bis-:
The embodiment of the emulation mode that embodiment bis-provided by the invention is the medium-term and long-term meritorious coordination control of a kind of wind-powered electricity generation unit, in this embodiment bis-, scheduling arrangement in the step S1 Plan Curve of exerting oneself is according to current Operation of Wind Power Plant (comprising wind speed, wind-powered electricity generation unit output etc.) by scheduling part, and, in conjunction with wind power prediction and load prediction situation, formulate the wind-powered electricity generation power curve within following a period of time.This scheduling arrangement is exerted oneself and is comprised in the works fixing long-term arrangement exert oneself (wind-powered electricity generation of take exert oneself yearly plan and daily planning be with reference to) and variable short term scheduling plan.Scheduling arrange the to exert oneself form of Plan Curve comprises 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, by the skew of detection of grid frequency, carries out the signal of real-time monitoring automatically to exerting oneself of conventional unit and wind-powered electricity generation.
In step S1, can artificially select as required by scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal obtain this wind-powered electricity generation unit P that exerts oneself that exerts oneself
i, the target of the wind-powered electricity generation unit the obtained P that exerts oneself
ifor scheduling arranges the target of the wind-powered electricity generation unit of the plan of the exerting oneself P that exerts oneself
jthe perhaps target of the wind-powered electricity generation unit in the instruction of the AGC real-time monitoring P that exerts oneself
a.
Preferably, can also be to the target P that exerts oneself in step S1
iset amplitude limit value, the upper limit P of its setting
maxfor the specified active power of wind-powered electricity generation unit, lower limit P
minbe 0 or the minimum load of dispatching of power netwoks service requirement.
The operation area of step S3 apoplexy group of motors comprises starting district, maximal wind-energy tracing Area, Heng Zhuansuqu and Heng Gongshuaiqu.
In step S3 according to active-power P
iand corresponding rotational speed omega
i, judge that the method for the operation area of this wind-powered electricity generation unit is:
When not reaching rated speed, the wind-powered electricity generation unit is in the maximal wind-energy tracing Area;
When rotating speed reaches rated speed, and power is not while reaching rated power, and the wind-powered electricity generation unit is in Heng Zhuansuqu.
In step S3, according to the operation area of this wind-powered electricity generation unit, select the method for this wind-powered electricity generation unit being carried out to propeller pitch angle control or active power control to be:
The wind-powered electricity generation unit, when the maximal wind-energy tracing Area, is exerted oneself corresponding rotating speed as rotating speed of target using wind-powered electricity generation unit target, carrys out the variation of power ratio control by the rotating speed of regulating wind power unit, makes the wind-powered electricity generation generating unit speed according to desired value ω
xchange ω
x=ω
i.
The wind-powered electricity generation unit, when permanent rotating speed district, carrys out the variation of power ratio control by regulating propeller pitch angle, maintain invariablenes turning speed, regulates controlled quentity controlled variable for meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), P wherein
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, the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. the simulation model that the medium-term and long-term meritorious coordination of wind-powered electricity generation unit is controlled, is characterized in that, described simulation model comprises input signal receiver module, signal selection processing module, the operating point determination module connected successively and selects Executive Module;
The scheduling arrangement that described input signal receiver module receives the wind-powered electricity generation unit of input exert oneself Plan Curve and AGC real-time monitoring command signal;
Described signal selective reception module is according to described scheduling arrangement target that Plan Curve or described AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself
i;
Described operating point determination module is determined the target of the described wind-powered electricity generation unit P that exerts oneself according to the operation characteristic P-ω curve of described wind-powered electricity generation unit
icorresponding rotational speed omega
i;
Described selection Executive Module is according to the target of the described wind-powered electricity generation unit P that exerts oneself
iand rotational speed omega
idetermine the operation area of described wind-powered electricity generation unit, select described wind-powered electricity generation unit is carried out to propeller pitch angle control or active power control according to the operation area of described wind-powered electricity generation unit.
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-powered electricity generation unit be by traffic department according to current Operation of Wind Power Plant, in conjunction with wind power prediction and load prediction situation, the wind-powered electricity generation power 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;
The described Plan Curve form of exerting oneself of 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, by the skew of detection of grid frequency, carries out the signal of real-time monitoring automatically to exerting oneself of conventional unit and wind-powered electricity generation.
3. simulation model as claimed in claim 1, is characterized in that, described signal selective reception module comprises the switching value K be connected with the plan power curve signal of input
1with the switching value K that is connected of AGC real-time monitoring command signal with input
2;
Described signal selective reception module is according to described scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself
imethod be:
K is set
1=1 o'clock K
2=0 or K
1=0 o'clock K
2=1 two kind of situation, by output P
i=K
1* P
j+ K
2* P
athe target that the obtains described wind-powered electricity generation unit P that exerts oneself
ithe target P that exerts oneself for the described scheduling arrangement plan of exerting oneself
jor the P that exerts oneself of the target in the instruction of described AGC real-time monitoring
a.
4. simulation model as claimed in claim 1, is characterized in that, described signal selective reception module is to the described target P that exerts oneself
iset amplitude limit value, the upper limit P of setting
maxfor the specified active power of described wind-powered electricity generation unit, lower limit P
minbe 0 or the minimum load of dispatching of power netwoks service requirement.
5. simulation model as claimed in claim 1, is characterized in that, the operation area of described wind-powered electricity generation unit comprises: starting district, maximal wind-energy tracing Area, Heng Zhuansuqu and Heng Gongshuaiqu;
According to described active-power P
iand corresponding rotational speed omega
i, judge that the method for the operation area of described wind-powered electricity generation unit is:
When not reaching rated speed, described wind-powered electricity generation unit is in the maximal wind-energy tracing Area;
When rotating speed reaches rated speed, and power is not while reaching rated power, and described wind-powered electricity generation unit is in Heng Zhuansuqu;
Described selection Executive Module selects in two of propeller pitch angle control module or active power control modules to be controlled described wind-powered electricity generation unit, reaches described wind-powered electricity generation unit is carried out to the purpose that propeller pitch angle control or active power are controlled;
Described selection Executive Module comprises the switching value K be connected with the propeller pitch angle control module
3with the switching value K be connected with the active power control module
4, according to the operation area of described wind-powered electricity generation unit, select the method for described wind-powered electricity generation unit being carried out to propeller pitch angle control or active power control to be:
If described wind-powered electricity generation unit is in described maximal wind-energy tracing Area, by switching value K
3be set to 0, K
4be set to 1, select described active power control module to control described wind-powered electricity generation unit;
If described wind-powered electricity generation unit is in described Heng Zhuansuqu, by switching value K
3be set to 1, K
4be set to 0, select described propeller pitch angle control module to control described wind-powered electricity generation unit.
6. simulation model as claimed in claim 5, is characterized in that,
Described wind-powered electricity generation unit is when described maximal wind-energy tracing Area, by the described wind-powered electricity generation unit target corresponding rotational speed omega of exerting oneself
ias rotating speed of target ω
x, carry out the variation of power ratio control by the rotating speed of regulating described wind-powered electricity generation unit, make described wind-powered electricity generation generating unit speed according to described rotating speed of target ω
xchange;
Described wind-powered electricity generation unit, when described permanent rotating speed district, carrys out the variation of power ratio control by regulating propeller pitch angle, maintain invariablenes turning speed, regulates controlled quentity controlled variable for meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), P wherein
0for meritorious reference value.
7. the emulation mode that the medium-term and long-term meritorious coordination of wind-powered electricity generation unit is controlled, is characterized in that, described emulation mode comprises:
Step S1, the scheduling arrangement that receives the wind-powered electricity generation unit of input exert oneself Plan Curve and AGC real-time monitoring command signal, by described scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself
i;
Step S2, determine the target of the described wind-powered electricity generation unit P that exerts oneself according to the operation characteristic P-ω curve of wind-powered electricity generation unit
icorresponding rotational speed omega
i;
Step S3, according to the target of the described wind-powered electricity generation unit P that exerts oneself
iand rotational speed omega
idetermine the operation area of described wind-powered electricity generation unit, select described wind-powered electricity generation unit is carried out to propeller pitch angle control or active power control according to the operation area of described wind-powered electricity generation unit.
8. emulation mode as claimed in claim 7, is characterized in that,
In described step S1, the Plan Curve of exerting oneself of the scheduling arrangement of described wind-powered electricity generation unit be by traffic department according to current Operation of Wind Power Plant, in conjunction with wind power prediction and load prediction situation, the wind-powered electricity generation power 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;
The described Plan Curve form of exerting oneself of 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, by the skew of detection of grid frequency, carries out the signal of real-time monitoring automatically to exerting oneself of conventional unit and wind-powered electricity generation;
The artificial selection by scheduling arrangement target that Plan Curve or AGC real-time monitoring command signal the obtain described wind-powered electricity generation unit P that exerts oneself that exerts oneself as required
i, the target of the described wind-powered electricity generation unit the obtained P that exerts oneself
ifor the target of wind-powered electricity generation unit of the described scheduling arrangement plan of the exerting oneself P that exerts oneself
jthe perhaps target of the wind-powered electricity generation unit in the instruction of the described AGC real-time monitoring P that exerts oneself
a.
9. emulation mode as claimed in claim 7, is characterized in that, in described step S1, also comprises the described target P that exerts oneself
iset amplitude limit value, the upper limit P of setting
maxfor the specified active power of wind-powered electricity generation unit, lower limit P
minbe 0 or the minimum load of dispatching of power netwoks service requirement.
10. emulation mode as claimed in claim 7, is characterized in that,
The operation area of wind-powered electricity generation unit described in described step S3 comprises starting district, maximal wind-energy tracing Area, Heng Zhuansuqu and Heng Gongshuaiqu;
In described step S3 according to active-power P
iand corresponding rotational speed omega
i, judge that the method for the operation area of this wind-powered electricity generation unit is:
When not reaching rated speed, described wind-powered electricity generation unit is in the maximal wind-energy tracing Area;
When rotating speed reaches rated speed, and power is not while reaching rated power, and described wind-powered electricity generation unit is in Heng Zhuansuqu;
In described step S3, according to the operation area of described wind-powered electricity generation unit, select the method for described wind-powered electricity generation unit being carried out to propeller pitch angle control or active power control to be:
Described wind-powered electricity generation unit, when the maximal wind-energy tracing Area, is exerted oneself corresponding rotating speed as rotating speed of target using described wind-powered electricity generation unit target, carrys out the variation of power ratio control by the rotating speed of regulating described wind-powered electricity generation unit, makes the wind-powered electricity generation generating unit speed according to desired value ω
xchange ω
x=ω
i;
Described wind-powered electricity generation unit, when permanent rotating speed district, carrys out the variation of power ratio control by regulating propeller pitch angle, maintain invariablenes turning speed, regulates controlled quentity controlled variable for meritorious deviation delta P
x, Δ P
x=K
3* (P
i-P
0), P wherein
0for meritorious reference value.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777525A (en) * | 2014-02-26 | 2014-05-07 | 华北电力大学 | User-defined interface of wind power station simulation machine and RTDS (real time digital simulator) |
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| CN111416364A (en) * | 2020-04-14 | 2020-07-14 | 三峡大学 | Wind power plant variable-coordinated frequency modulation control method considering actual wind speed characteristics |
| CN111416364B (en) * | 2020-04-14 | 2023-06-02 | 三峡大学 | Wind farm transformation cooperative frequency modulation control method considering actual wind speed characteristics |
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