CN101915219B - Wind-power generator maximal wind-energy capture control method based on self-adaptive theory - Google Patents

Abstract

The invention belongs to the filed of wind-power generator control and relates to a wind-power generator maximal wind-energy capture control method based on a self-adaptive theory, which is characterized in that firstly n wind speed values are selected from the cut-in wind speed to the rated wind speed of a wind-power generator, wherein each wind speed value corresponds to a rotating speed value so that a rotating speed point range is formed, and each rotating speed value corresponds to one modifying factor. The control method comprises the following steps of: 1. judging whether the sampled rotating speed value is in the selected rotating speed point range or not, if so, carrying out the primary setting of the operation mode of the wind-power generator of a step 2, and otherwise, directly carrying out the secondary setting of the operation mode of the wind-power generator of a step 4 without updating the modifying factor, and still adopting a maximum power curve which corresponds to the current modifying factor to control the torque of the wind-power generator according to a given result of the step 4; 2. carrying out the primary setting of the operation mode of the wind-power generator; 3. updating the modifying factor; 4. carrying out the secondary setting of the operation mode of the wind-power generator; and 5. controlling electromagnetic torque of the generator. The invention can reduce the influence of the aerodynamic characteristic parameter variation of the wind-power generator on system control and is helpful for improving the efficiency of wind energy capture of the wind-power generator.

Description

A kind of wind-power generator maximal wind-energy capture control method based on adaptation theory

Technical field

The invention belongs to wind-driven generator control field, relate in particular to a kind of method of wind-power generator maximal wind-energy capture control.

Background technique

In variable-speed constant-frequency wind power generation system, wind-driven generator operates in and is lower than rated wind speed following time, needs constantly the electromagnetic torque T through the adjustment generator _eTo change the wind-driven generator rotational speed omega _r, follow the trail of optimized rotating speed value ω _{R_opt}, make wind-driven generator operate in optimal working point (being called for short OOP among Optimal Operating Point the present invention), thereby make wind-driven generator can catch more windy ability.In recent years, the scientific research personnel has proposed a series of control strategy to wind-power generator maximal wind-energy capture both at home and abroad.Wherein some controlling method need be obtained more wind-driven generator aerodynamic characteristic information; And wind speed information; For example; Adopt synovial membrane control can provide the method for operation (quicken, slow down or keep the running state constant etc.) of next control cycle of wind-driven generator relatively accurately, but receive deviation that measuring wind causes and because the wind-driven generator aerodynamic characteristic will influence its control effect with factors such as variations working time; The required wind-power electricity generation machine information of other controlling method is less; Though for example the search by hill climbing method does not need measuring wind; Information needed seldom, only through judging that wind-driven generator catches the method for operation that the variation of power provides next control cycle of wind-driven generator, but the rotary inertia of large-scale wind driven generator is very big; Rotating speed response is difficult to improve; The fluctuations in wind speed variation can cause wind-driven generator when not reaching optimized rotating speed, just changes the running state of wind-driven generator because of the variation of wind-power electricity generation acc power increase and decrease situation, therefore can cause the wind-driven generator actual speed constantly to depart from optimized rotating speed; Especially when wind speed sudden change situation very serious situation, the control signal that controller provides possibly make wind-driven generator deviate from the optimized rotating speed operation always.

Summary of the invention

The objective of the invention is to overcome the above-mentioned deficiency of existing technology; A kind of wind-power generator maximal wind-energy capture control method is proposed; This method combining adaptive control theory; Can be when wind-driven generator being carried out maximal wind-energy capture control; Constantly modifying factor wind-driven generator aerodynamic characteristic changes the peak output curve that causes and departs from, thereby obtains the actual peak output curve of wind-driven generator comparatively accurately, and the selected actual peak output curve that obtains with this search is that the fluctuate zone of scope of benchmark is the optimized working zone territory (Optimal Operating Region the present invention is called for short OOR) that wind-driven generator moves; Controlling method proposed by the invention can reduce the wind-driven generator parameter of aerodynamic characteristics and change the influence that control brings to wind-driven generator, helps to improve the efficient of wind-driven generator capturing wind energy.The technological scheme that the present invention adopts is following:

A kind of wind-power generator maximal wind-energy capture control method based on adaptation theory is characterized in that, at first from wind-driven generator incision wind speed V _{W_cut-in}Arrive rated wind speed V _{W_rated}Between (be wind-power generator maximal wind-energy capture operating air velocity interval), choose some air speed value

I=1,2,3......n is the interval with Δ Vm/s wind speed, then n wind speed point is INT (V _{W_cut-in})+1, INT (V _{W_cut-in})+1+ Δ V, INT (V _{W_cut-in})+1+2 * Δ V ... INT (V _{W_cut-in})+1+ (n-2) * Δ V, INT (V _{W_rated}), wherein, INT representes bracket function, n=[(INT (V _{W_rated})-(INT (V _{W_cut-in})+1))/Δ V]+1, at this moment, n wind speed point is according to initial optimum tip speed ratio λ _{Opt_ini}Can calculate n corresponding optimized rotating speed value

Constitute selected rotating speed point range, establish each corresponding modifying factor M of these tachometer values _i, this rotating speed then

Maximum power value P after pairing the k time renewal _{Opt_Mi (k)}Can be expressed as

P _{opt_Mi(k)}＝M _i(k)K _{opt_ini}(ω _i) ³

In the formula, M _i(k) expression is revised k=0,1,2...... the k time; Scaling factor K _{Opt_ini}Can be expressed as

$K_{\mathrm{opt}\_\mathrm{ini}}=0.5\mathrm{\ρA}{R}^3{C}_{P\max \_\mathrm{ini}}/{\mathrm{\λ}}_{\mathrm{opt}\_\mathrm{ini}}^3$

In the formula, ρ is an air density; A is the wind energy conversion system wind sweeping area, A=π R ²R is the wind energy conversion system radius; C _{Pmax_ini}Be initial maximal wind-energy utilization factor; λ _{Opt_ini}Be initial optimum tip speed ratio; (C _{Pmax_ini}, λ _{Opt_ini}) be one group of optimum value of initial setting, and initial given M ₁(0)=M ₂(0)=... M _n(0)=M _Avg(0)=1, M wherein _AvgBe M _iThe mean value of ordered series of numbers, representation does

$M_{\mathrm{Avg}}\left(k\right)=\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{M}_i\left(k\right),$

This controlling method also comprises the following steps:

The first step: judge that the sampling tachometer value is whether in selected rotating speed point range

Judge the t tachometer value ω that samples constantly _r(t) whether in selected rotating speed point range, if ω _r(t) in selected tachometer value point range

Scope in, then get into second the step the wind-driven generator method of operation given for the first time; Otherwise the wind-driven generator running state secondary that directly got into for the 4th step is given, does not also upgrade M simultaneously _Avg, still adopt M _Avg(k-1) the peak output curve P of correspondence _{Opt_M_Avg (k-1)}, according to given result of the 4th step wind-driven generator is carried out torque control then;

Second step: the wind-driven generator method of operation is given for the first time

If power offset delta P _WBe meant the corresponding maximum power value P of a certain rotating speed _Opt(ω _r(t)) with wind-driven generator capturing wind energy power P this moment _W(t) difference, its representation does

ΔP _W(t)＝P _W(t)-P _opt(ω _r(t))

Got into for second step, ω then is described _r(t) equal This moment Δ P _W(t) do

$\mathrm{\Δ}{P}_W\left(t\right)=P_W\left(t\right)-P_{\mathrm{opt}\_\mathrm{Mi}\left(k\right)}\left({\mathrm{\ω}}_r^i\right)$

If

Explain that then wind-driven generator has been operated in the optimized working zone territory, be designated as OOR, then get into the 3rd step modifying factor and upgrade; Otherwise, if

Explain that then wind-driven generator should quicken operation, if

Explain that then wind-driven generator should run slowly, under the both of these case, it is given directly to get into the 4th step wind-driven generator method of operation secondary, does not upgrade M _Avg, still adopt M _Avg(k-1) the peak output curve P of correspondence _{Opt_M_Avg (k-1)}, then wind-driven generator is carried out torque control;

The 3rd step: modifying factor is upgraded

It is according to the given result of a last control cycle wind-driven generator method of operation secondary that modifying factor is upgraded, a last control cycle wind-driven generator capturing wind energy power P _W(t-1) and this control cycle wind-driven generator capturing wind energy power P _W(t), current M _i(k) and upgraded M as a result last time _i(k-1) determine M jointly _iUpgrade M as a result k+1 time _i(k+1), its rule is as follows:

Should quicken operation if the given result of an a. last control cycle wind-driven generator method of operation secondary is a wind-driven generator, i.e. explanation wind-driven generator this moment gets into OOR, its M by acceleration mode _iTo upgrade result expression k+1 time following:

M _i(k)-d×(1-P _W(t-1)/P _W(t))×|M _i(k)-M _i(k-1)|＝M _i(k+1)

In the formula, d is a update coefficients; Stipulate 1-P among the present invention _W(t-1)/P _W(t) output is following:

$1-\frac{P_W(t-1)}{P_W\left(t\right)}=\left\{\begin{array}{cc}0& \frac{P_W(t-1)}{P_W\left(t\right)}<0.9\mathrm{or}\frac{P_W(t-1)}{P_W\left(t\right)}>1.1\\ 1-\frac{P_W(t-1)}{P_W\left(t\right)}& 0.9\&le;\frac{P_W(t-1)}{P_W\left(t\right)}\&le;1.1\end{array}\right.$

If the given result of a b. last control cycle wind-driven generator method of operation secondary is that wind-driven generator should run slowly, explain that promptly wind-driven generator gets into OOR, its M by deceleration regime _iTo upgrade result expression k+1 time following:

M _i(k)+d×(1-P _W(t-1)/P _W(t))×|M _i(k)-M _i(k-1)|＝M _i(k+1)

If the given result of a c. last control cycle wind-driven generator method of operation secondary is that wind-driven generator has been operated in OOR; Explain that promptly the wind-driven generator front and back all operate among the OOR twice; At first need do one section delay to system this moment; After postponing the control cycle end,, repeat this moment last to M if system judges that still wind-driven generator operates in OOR _iIdentical update mode gets final product; Otherwise system continues by former flow performing;

After above-mentioned rule completion renewal, Corresponding M _i(k) will be updated to M _i(k+1), other rotating speed points (j=1,2,3......n, still, the modifying factor M that j ≠ i) is corresponding _j(k), after the renewal, keep initial value constant, M _j(k+1) equal M _j(k) get final product; And M _Avg(k) will be updated to M _Avg(k+1);

The 4th step: wind-driven generator method of operation secondary is given

If carried out the 3rd step, ω _r(t) equal

Δ P then _W(t) do

$\mathrm{\&Delta;}{P}_W\left(t\right)=P_W\left(t\right)-P_{\mathrm{opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)$

(1) if

would explain wind-driven generator should quicken the operation;

Wherein, if

then adopts fast accelerated mode operation;

If

then adopts slow accelerated mode operation;

(2) if

then explain that wind-driven generator has been operated in OOR;

(3) if

then explain that wind-driven generator should run slowly;

Wherein, if

then adopts fast ways of deceleration operation;

If

then adopts slow ways of deceleration operation;

If do not carry out for the 3rd step, Δ P then _W(t) do

ΔP _W(t)＝P _W(t)-P _{opt_M_Avg(k-1)}(ω _r(t))

(1) if 0.01P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t), explain that then wind-driven generator should quicken operation;

Wherein, if 0.1P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t), then adopt fast accelerated mode operation;

If 0.01P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t)≤0.1P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt slow accelerated mode operation;

(2) if-0.01P _{Opt_M_Avg (k-1)}(ω _r(t))≤Δ P _W(t)≤0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), explain that then wind-driven generator has been operated in OOR;

(3) if Δ P _W(t)＜-0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), explain that then wind-driven generator should run slowly;

Wherein, if Δ P _W(t)＜-0.1P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt fast ways of deceleration operation;

If-0.1P _{Opt_M_Avg (k-1)}(ω _r(t))≤Δ P _W(t)＜-0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt slow ways of deceleration operation:

The 5th step: generator controlling electromagnetic torque

According to the given result of the 4th step wind-driven generator method of operation secondary, generator electromagnetic torque T _e(t) and wind energy conversion system machine torque T _W(t), provide the electromagnetic torque setting value T of this control cycle _{E_ref}(t)

(1) if fast accelerated mode moves the given result of t moment secondary for wind-driven generator adopts, if T _e(t)＜T _W(t), T then _{E_ref}(t)=T _e(t), and keep this setting value constant, change up to the given result of the wind-driven generator secondary method of operation and give T more again _{E_ref}Assignment; If T _e(t)>=T _W(t), T then _{E_ref}(t)=0.95T _W(t);

(2) slow accelerated mode moves if the given result of secondary is for wind-driven generator adopts, then T _{E_ref}(t)=0.95T _W(t);

(3) if the given result of secondary has been operated in OOR for wind-driven generator, T then _{E_ref}(t)=T _W(t);

(4) slow ways of deceleration moves if the given result of secondary is for wind-driven generator adopts, then T _{E_ref}(t)=1.05T _W(t);

(5) fast ways of deceleration moves if the given result of secondary is for wind-driven generator adopts, if T _e(t)＞T _W(t), T then _{E_ref}(t)=T _e(t), and keep this setting value constant, change up to the given result of the wind-driven generator secondary method of operation and give T more again _{E_ref}Assignment; If T _e(t)≤T _W(t), T then _{E_ref}(t)=1.05T _W(t).

Technique effect of the present invention is following:

1, the present invention is a kind of maximal wind-energy capture control method that combines with Adaptive Control Theory; Promptly when wind-driven generator is carried out maximal wind-energy capture; Constantly revising the wind-driven generator parameter of aerodynamic characteristics makes it more near actual value; Thereby obtain the actual peak output curve of wind-driven generator comparatively accurately; The selected actual peak output curve that obtains with this search is that the fluctuate zone of scope of benchmark is the optimized working zone territory of wind-driven generator operation, and the controlling method that is proposed reduces the wind-driven generator parameter of aerodynamic characteristics and changes the influence that control brings to wind-driven generator, helps to improve the efficient of wind-driven generator capturing wind energy.

2, control strategy proposed by the invention need not increase extras to the collection of wind speed, has reduced the optimized rotating speed of being forbidden to cause because of measuring wind speed simultaneously yet and has departed from.

3, control strategy proposed by the invention can adapt to the characteristics of wind speed change at random.

Description of drawings

Fig. 1 is under the different wind speed, the relation of the corresponding relation of wind-driven generator capturing wind energy power and rotating speed and peak output curve and rotating speed.

Fig. 2 (a) is the relation of tip speed ratio λ and power coefficient; Fig. 2 (b) is optimum tip speed ratio λ _OptThe situation that departs from the corresponding maximal wind-energy capture curve offset in back.

Fig. 3 is based on the wind-power generator maximal wind-energy capture control method FB(flow block) of adaptation theory.

Fig. 4 is a principle schematic of judging the wind-driven generator method of operation.

Fig. 5 is the running principle schematic representation of the example case of describing 1.

Fig. 6 is the running principle schematic representation of the example case of describing 2.

Fig. 7 is the running principle schematic representation of the example case of describing 3.

Fig. 8 is the running principle schematic representation of the example case of describing 4.

Embodiment

At first combine to attach Fig. 1 and 2 below, the simple theoretical background that adopts this method of setting forth.

Wind-driven generator capturing wind energy power P _W, representation is following:

$P_W=K{\mathrm{\&omega;}}_r^3---\left(1\right)$

ω _rBe the wind-driven generator rotating speed, K is the amount relevant with the wind-driven generator aerodynamic characteristic, and representation is following:

K＝0.5ρAR ³C _P(λ)/λ ³ (2)

Wherein, ρ is an air density, and A is the wind energy conversion system wind sweeping area, A=π R ², R is the wind energy conversion system radius.

C _PBe power coefficient, when wind-power generating system is operated in maximal wind-energy capture during the stage, C _PIt is the function of tip speed ratio λ; The representation of tip speed ratio λ is following:

λ＝ω _rR/V _W (3)

V _WIt is air speed value.

Under the constant wind speed, when wind-driven generator operates in a certain rotating speed, can catch maximal wind-energy.Wind-driven generator peak output curve P _Opt, representation is following:

$P_{\mathrm{opt}}=K_{\mathrm{opt}}{\mathrm{\&omega;}}_r^3---\left(4\right)$

K _OptBe the amount relevant with the wind-driven generator aerodynamic characteristic, representation is following:

$K_{\mathrm{opt}}=0.5\mathrm{\&rho;A}{R}^3{C}_{P\max }/{\mathrm{\&lambda;}}_{\mathrm{opt}}^3---\left(5\right)$

Wherein, C _PmaxBe the maximal wind-energy utilization factor; λ _OptBe optimum tip speed ratio; (C _Pmax, λ _Opt) be one group of corresponding optimum value, under a certain wind speed, when the wind-driven generator rotating speed satisfies optimum tip speed ratio λ _OptThe time, this moment, wind-driven generator captured maximal wind-energy, C _PEqual C _PmaxUnder perfect condition, under the different wind speed, the relation of power curve is as shown in Figure 1 under peak output curve and each wind speed.

But if obtain (C _Pmax, λ _Opt) initial value (C _{Pmax_ini}, λ _{Opt_ini}) time, (C _{Pmax_ini}, λ _{Opt_ini}) just with actual value (C _{Pmax_act}, λ _{Opt_act}) there is a deviation; Perhaps after wind-driven generator operation a period of time because this body structure of wind-driven generator changes and causes actual value (C _{Pmax_act}, λ _{Opt_act}) change and no longer to equal initial value (C _{Pmax_ini}, λ _{Opt_ini}) time, all can cause situation as shown in Figure 2, promptly initial peak output curve can depart from actual conditions, wherein λ _OptBe actual optimum tip speed ratio, λ ' _OptFor less than λ _OptSituation, λ " _OptFor greater than λ _OptSituation.Therefore, if in the wind-driven generator control procedure, adopt (C always _{Pmax_ini}, λ _{Opt_ini}) as the wind-driven generator parameter of aerodynamic characteristics, then can cause wind-driven generator to be caught less than actual peak output.Introduce Adaptive Control Theory and can effectively solve the control problem that parameter changes and causes in the running, progressively revise wind-driven generator aerodynamic characteristic information, help to improve the efficient of wind-driven generator capturing wind energy.

The wind-power generator maximal wind-energy capture control method based on adaptation theory that the present invention proposes, this method are at first from wind-driven generator incision wind speed V _{W_cut-in}Arrive rated wind speed V _{W_rated}Between, promptly the wind-power generator maximal wind-energy capture operating air velocity is interval, chooses some air speed value

I=1,2,3......n.

In specific embodiment, be the interval with the 0.5m/s wind speed, then n wind speed point is INT (V _{W_cut-in})+1, INT (V _{W_cut-in})+1+0.5, INT (V _{W_cut-in})+1+2 * 0.5 ... INT (V _{W_cut-in})+1+ (n-2) * 0.5, INT (V _{W_rated}), wherein, INT is a bracket function.

n＝[(INT(V _{W_rated})-(INT(V _{W_cut-in})+1))/0.5]+1 (6)

At this moment, this n wind speed point is according to initial lambda _{Opt_ini}Can calculate n corresponding optimized rotating speed value Constitute a rotating speed point range, each corresponding modifying factor M of these tachometer values _i, this rotating speed then

Maximum power value P after pairing the k time renewal _{Opt_Mi (k)}Can be expressed as:

$P_{\mathrm{opt}\_\mathrm{Mi}\left(k\right)}=M_i\left(k\right)K_{\mathrm{opt}\_\mathrm{ini}}{\left({\mathrm{\&omega;}}_r^i\right)}^3---\left(7\right)$

In the formula,

Be to adopt initial optimum value (CP _{Max_ini}, λ _{Opt_ini}) scaling factor that calculates; M _i(k) expression is revised k=0,1,2...... the k time.

In control flow, only when the sampling rotational speed omega _rCarry out just when equaling a certain value in these some rotating speed points that the wind-driven generator method of operation is first given to be upgraded with carrying out, upgrade the M that obtains _i, and, adopt modifying factor M for the tachometer value in the non-selected point range _Avg, then have:

$P_{\mathrm{opt}\_M\_\mathrm{Avg}}=M_{\mathrm{Avg}}{K}_{\mathrm{opt}\_\mathrm{ini}}{\mathrm{\&omega;}}_r^3---\left(8\right)$

Wherein,

I=1,2,3......n; After then upgrading for the k time, M _Avg(k) representation is following:

$M_{\mathrm{Avg}}\left(k\right)=\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{M}_i\left(k\right)---\left(9\right)$

The M that the present invention is only corresponding to several specific rotation speeds values _iUpgrade the problem that this randomness that mainly is solution changes because of wind speed causes.During original state, given M ₁(0)=M ₂(0)=... M _n(0)=M _Avg(0)=1.Through bringing in constant renewal in M _iThereby, upgrade M _Avg, make P _{Opt_M_Avg}(ω _r) progressively approach actual peak output curve P _{Opt_act}(ω _r).

The wind-power generator maximal wind-energy capture control flow is as shown in Figure 3, comprising 5 key steps, will elaborate to these 5 step executive modes below.

The first step: judge that the sampling tachometer value is whether in selected rotating speed point range

Get into the control flow first step and need judge the t tachometer value ω that samples constantly _r(t) whether in selected rotating speed point range, if ω _r(t) in selected tachometer value point range

Scope in, it is given for the first time then to get into the second step wind-driven generator method of operation; To go into wind-driven generator running state secondary given otherwise directly get into the 4th stepping, also do not upgrade M simultaneously _Avg, still adopt M _Avg(k-1) the peak output curve P of correspondence _{Opt_M_Avg (k-1)}, according to given result of the 4th step wind-driven generator is carried out torque control then.

Second step: the wind-driven generator method of operation is given for the first time

If ω _r(t) in the scope of selected tachometer value point range, promptly

It is given for the first time then to get into the second step wind-driven generator method of operation.

The wind-driven generator method of operation is given to be meant according to power offset delta P _WProvide the method for operation of wind-driven generator at next control cycle.Δ P wherein _WBe meant the corresponding maximum power value P of a certain rotating speed _Opt(ω _r(t)) with wind-driven generator capturing wind energy power P this moment _W(t) difference, promptly

ΔP _W(t)＝P _W(t)-P _opt(ω _r(t)) (10)

Under ideal situation shown in Figure 4, explain how according to Δ P _WNext control cycle method of operation of the given wind-driven generator of situation.A kind of situation, the false wind power generator is operated in operation point 1, and is wind speed V ₂Following optimal working point is when wind speed rises to V ₃(or drop to V ₁) time, the operation point can be displaced to a little 1 ' and (1 ") therefore can be inferred the wind speed situation of change according to the side-play amount situation; Another kind of situation, the false wind power generator is operated in wind speed V ₂Down, the wind-driven generator rotating speed 2 accelerates to operation point 3 from the operation point, and side-play amount is constantly dwindled in the accelerating process.Therefore, the processing of power offset from being interpreted as that with above-mentioned two kinds of situation the big more explanation change of wind velocity of side-play amount is obvious more, is departed from optimal working point more, otherwise explanation wind-driven generator traffic direction this moment is correct, more near optimal working point.Consider the influence of actual wind speed noise section and sampling noiset; Need selected with the peak output curve be benchmark the zone of necessarily fluctuating is arranged is the optimized working zone territory (OptimalOperating Region is called for short OOR) of wind-driven generator operation, wind-driven generator operates in then thinks the approaching theoretic optimized rotating speed value of wind-driven generator rotating speed this moment in this zone.Selected in the present embodiment is that fluctuate 1% zone of benchmark is the optimized working zone territory of wind-driven generator operation with the peak output curve.

Adopt said method the wind-driven generator running state to be carried out given for the first time among the present invention.The first given M that adopts before upgrading that is meant _i(k) as modifying factor, pairing maximum power value does

Wherein Then this moment Δ P _W(t) do

$\mathrm{\&Delta;}{P}_W\left(t\right)=P_W\left(t\right)-P_{\mathrm{opt}\_\mathrm{Mi}\left(k\right)}\left({\mathrm{\&omega;}}_r^i\right)---\left(11\right)$

Foundation and the result first given according to the foregoing wind-driven generator method of operation are following:

(1) if

would explain wind-driven generator should quicken the operation;

(2) if then explain that wind-driven generator has been operated in OOR;

(3) if then explain that wind-driven generator should run slowly;

If given result is operated in OOR for wind-driven generator, then gets into the 3rd step modifying factor and upgrade; Otherwise it is given to get into the 4th step wind-driven generator method of operation secondary, does not upgrade M _i, still adopt current M _AvgCorresponding maximum power value P _{Opt_M_Avg}, then wind-driven generator is carried out torque control.

The 3rd step: modifying factor is upgraded

Modifying factor is upgraded and is meant according to the given result of a last control cycle wind-driven generator method of operation secondary a last control cycle wind-driven generator capturing wind energy power P _W(t-1) and this control cycle wind-driven generator capturing wind energy power P _W(t), current M _i(k) and upgraded M as a result last time _i(k-1) determine M jointly _iUpgrade M as a result k+1 time _i(k+1).It is regular as follows:

(1) if the given result of a last control cycle wind-driven generator method of operation secondary is a wind-driven generator should quicken operation, i.e. explanation wind-driven generator this moment gets into OOR, its M by acceleration mode _iTo upgrade result expression k+1 time following:

M _i(k)-d×(1-P _W(t-1)/P _W(t))×|M _i(k)-M _i(k-1)|＝M _i(k+1) (12)

Wherein, d is a update coefficients.

1-P _W(t-1)/P _W(t) certain export-restriction is arranged, this mainly is the influence that brings because of the wind speed sudden change in order to reduce; Wind speed is a change at random in actual motion, and twice instantaneous variable power of catching of wind-driven generator was bigger before and after the wind speed sudden change caused and will cause control cycle, so the following relation of regulation in the present embodiment:

$1-\frac{P_W(t-1)}{P_W\left(t\right)}=\left\{\begin{array}{cc}0& \frac{P_W(t-1)}{P_W\left(t\right)}<0.9\mathrm{or}\frac{P_W(t-1)}{P_W\left(t\right)}>1.1\\ 1-\frac{P_W(t-1)}{P_W\left(t\right)}& 0.9\&le;\frac{P_W(t-1)}{P_W\left(t\right)}\&le;1.1\end{array}\right.---\left(13\right)$

(2) in like manner, if the given result of a last control cycle wind-driven generator method of operation secondary is that wind-driven generator should run slowly, explain that promptly wind-driven generator gets into OOR, its M by deceleration regime _iTo upgrade result expression k+1 time following:

M _i(k)+d×(1-P _W(t-1)/P _W(t))×|M _i(k)-M _i(k-1)|＝M _i(k+1) (14)

(3) if the given result of a last control cycle wind-driven generator method of operation secondary is that wind-driven generator has been operated in OOR; Explain that promptly the wind-driven generator front and back all operate among the OOR twice; At first need do one section delay to system this moment; After postponing the control cycle end,, repeat this moment last to M if system judges that still wind-driven generator operates in OOR _iIdentical update mode gets final product; Otherwise system continues by former flow performing.

In conjunction with Fig. 5-8, earlier with a certain selected tachometer value

Be example, sketch the corresponding modifying factor M of this tachometer value _iExecutive mode when adopting above-mentioned update rule.

Situation 1:

As shown in Figure 5, suppose t constantly, tachometer value

Corresponding M during original state _i(0), corresponding maximum power value

Wind speed is V ₀, the wind-driven generator rotational speed omega _r(t) equal

Catching power is P _W(t).From Fig. 5 frame of broken lines magnification region, find out, as if P this moment _W(t) in the interval

In, i.e. power deviation Δ P _W(t) in the interval

In, the first given result of the wind-driven generator method of operation has been operated in OOR for wind-driven generator.Situation when no longer operation gets into OOR to wind-driven generator in schematic representation 6-8 is done special processing and amplifying.The last control cycle t-1 moment wind speed of hypothesis also is V in the situation 1 ₀, catching power is P _W(t-1), the result that a last control cycle wind-driven generator method of operation secondary is given should quicken operation for wind-driven generator; Can know that then wind-driven generator is by quickening to get into the optimized working zone territory.Can know M by formula (12) _i(0) will be updated to M _i(1), then

Be updated to

Suppose that wind speed is V through the some time ₁, betide above-mentioned identical situation, then M _i(1) will be updated to M _i(2), then

Be updated to

Can infer that by formula (12) after wind-driven generator had moved m control cycle, false wind power generator rotating speed equaled at every turn

And when getting into OOR with acceleration mode, and wind speed is constant between twice control cycle in front and back, then along with the increasing progressively of update times, corresponding

With progressively approaching the corresponding actual maximum power value of this rotating speed

Then under the constant situation of wind speed between twice control cycle in front and back, P _W(t+m-1) and P _W(t+m) approaching more, simultaneously it upgrades step-length and progressively shakes and reduce and level off to 0.

With above-mentioned situation antithesis be, when the false wind power generator gets into OOR with deceleration regime all the time, and wind speed is constant between twice control cycle in front and back, then adopts formula (14) as update rule, its method of operation is essentially identical, here repeats no more.

Situation 2:

Get in the wind-driven generator working state in the situation 1 that wind speed is constant between former and later two control cycles of OOR; Though but in the actual motion systematic sampling cycle shorter; But the situation that rapid fluctuations took place in the sampling period wind speed also might take place, and this situation takes place at random.

Shown in Fig. 6 (a), suppose t constantly, Corresponding M _iUpgrade k time, corresponding Be approximately equal to actual maximum power value

(2 coincidences among Fig. 6 (a)).Wind speed is V ₁, the wind-driven generator rotational speed omega _r(t) equal

Catching power is P _W(t), be operated in OOR through the first given result of the wind-driven generator method of operation for wind-driven generator this moment; And suppose that last control cycle t-1 moment wind speed is V ₀, catching power is P _W(t-1), the given result of a last control cycle secondary method of operation should quicken operation for wind-driven generator; Can know that wind-driven generator is by quickening to get into the optimized working zone territory.Passing through type (12) can be found out, if P _W(t-1) and P _W(t) gap hour, M _i(k+1) should be approximately equal to M _i(k), but in the supposed situation 2, P _W(t-1) and P _W(t) gap is bigger, but because after upgrading for k time, M _i(k) very near M _i(k-1), this moment is according to formula (12), M _i(k) will be updated to M _i(k+1), then

Be updated to

After therefore upgrading for k+1 time

Depart from actual maximum power value

Very little, and passing through type (9) can be known M _iOnly to M _AvgInfluence have only the side-play amount of 1/n.

Situation and Fig. 6 (a) that Fig. 6 (b) describes are basic identical; After just upgrading for k+1 time, it is bigger that

departs from actual maximum power value .Nonetheless, treat that through behind m the control cycle, t+m wind-driven generator rotating speed constantly equals once more

And by quickening to get into OOR, once more to M _iUpgrade, can know, as long as P according to formula (12) _W(t+m-1) greater than P _W(t+m), M _i(k+1) will be updated to M _i(k+2), P then _{Opt_Mi (k+1)}Be updated to P _{Opt_Mi (k+2)}, this moment P _{Opt_Mi}To progressively approach actual peak output curve P again _{Opt_act}

With above-mentioned situation antithesis be, when the false wind power generator gets into OOR with deceleration regime all the time, and wind speed changes between twice control cycle in front and back, then adopts formula (14) as update rule, its method of operation is essentially identical, here repeats no more.

Situation 3:

Before either way hypothesis be that wind-driven generator gets into OOR with acceleration mode all the time; And in the actual conditions; Because wind speed is a change at random, so wind-driven generator possibly get into OOR with stochastic regime, or quickens or slow down to get into OOR; And the situation of stochastic problem is various, and existing is that example is done concise and to the point elaboration to wind-driven generator with the situation that stochastic regime gets into OOR with situation 3 only.

As shown in Figure 7, suppose t constantly,

Corresponding M _iUpgrade k time, corresponding

Be approximately equal to actual maximum power value (2 coincidences among Fig. 7), wind speed is V ₁, the wind-driven generator rotational speed omega _r(t) equal

Catching power is P _W(t), be operated in OOR through the first given result of the wind-driven generator method of operation for wind-driven generator this moment; And suppose that last control cycle t-1 moment wind speed is V ₀, catching power is P _W(t-1), the given result of a last control cycle wind-driven generator secondary method of operation should quicken operation for wind-driven generator; Can know that wind-driven generator is by quickening to get into the optimized working zone territory.Suppose in situation 3 P _W(t-1) and P _W(t) gap is bigger, and after upgrading for k time, M _i(k) and M _i(k-1) difference is very big, and then this moment is according to formula (12), M _i(k) will be updated to M _i(k+1), then

Be updated to

If behind m control cycle, t+m wind-driven generator rotating speed constantly equals once more

And with deceleration regime entering OOR, once more to M _iUpgrade, can know according to formula (14), then

Be updated to

At this moment

To progressively approach actual maximum power value again

Situation 4:

As shown in Figure 8; Suppose at t-1 constantly at wind-driven generator; The wind-driven generator rotating speed not in selected point range, promptly

but the given result of wind-driven generator method of operation secondary has been operated in OOR for wind-driven generator.And t constantly; The wind-driven generator rotating speed in selected point range, i.e.

and be the wind-driven generator OOR that worked according to the first given result of obtaining of the wind-driven generator method of operation.Twice operation all judged and obtained being operated in OOR before and after this moment wind-driven generator; Therefore the delay of a period of time need be done by system; Promptly postpone some control cycles; If wind speed is constant betwixt; After postponing a period of time; The wind-driven generator rotating speed is also with constant in theory; Promptly given for the first time through the wind-driven generator method of operation, given always result has been operated in OOR for wind-driven generator, then this moment

correspondence

will repeat the last time update mode and get final product.

The analysis of comprehensive above-mentioned 4 kinds of situation can know that though wind speed is the very strong input of randomness, the update method that the present invention proposes adopts the method for the renewal result of some selected tachometer values being got average, and this method has reduced local updating M as a result _iWhen departing to whole updating M as a result _AvgInfluence.In addition, to 1-P _W(t-1)/P _W(t) carrying out amplitude limit output can reduce to upgrade because of the mistake that wind speed suddenlys change or noise causes.

After above-mentioned rule completion renewal,

Corresponding M _i(k) will be updated to M _i(k+1), other rotating speed points

(j=1,2,3......n, still, the modifying factor M that j ≠ i) is corresponding _j(k), after the renewal, keep initial value constant, M _j(k+1) equal M _j(k) get final product; And M _Avg(k) will be updated to M _Avg(k+1).

The 4th step: wind-driven generator method of operation secondary is given

Wind-driven generator method of operation secondary is given to be according to P _W(t) and P _{Opt_Mi (k+1)}(t) or and P _{Opt_M_Avg (k-1)}(t) relation decision.If carried out for the 3rd step: modifying factor is upgraded, and then adopts P _{Opt_Mi (k+1)}Otherwise adopt P (t), _{Opt_M_Avg (k-1)}(t).Its given foundation and given result are following:

If carried out for the 3rd step,

Δ P then _W(t) do

$\mathrm{\&Delta;}{P}_W\left(t\right)=P_W\left(t\right)-P_{\mathrm{opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)---\left(15\right)$

(1) if

would explain wind-driven generator should quicken the operation;

Wherein, if

then adopts fast accelerated mode operation;

If

then adopts slow accelerated mode operation;

(2) if

then explain that wind-driven generator has been operated in OOR;

(3) if

then explain that wind-driven generator should run slowly;

Wherein, if then adopts fast ways of deceleration operation;

If

then adopts slow ways of deceleration operation;

If do not carry out for the 3rd step, Δ P then _W(t) do

ΔP _W(t)＝P _W(t)-P _{opt_M_Avg(k-1)}(ω _r(t)) (16)

(1) if 0.01P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t), explain that then wind-driven generator should quicken operation;

Wherein, if 0.1P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t), then adopt fast accelerated mode operation;

If 0.01P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t)≤0.1P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt slow accelerated mode operation;

(2) if-0.01P _{Opt_M_Avg (k-1)}(ω _r(t))≤Δ P _W(t)≤0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), explain that then wind-driven generator has been operated in OOR;

(3) if Δ P _W(t)＜-0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), explain that then wind-driven generator should run slowly;

Wherein, if Δ P _W(t)＜-0.1P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt fast ways of deceleration operation;

If-0.1P _{Opt_M_Avg (k-1)}(ω _r(t))≤Δ P _W(t)＜-0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt slow ways of deceleration operation;

The 5th step: generator controlling electromagnetic torque

The generator controlling electromagnetic torque is meant according to the given result of wind-driven generator method of operation secondary, generator electromagnetic torque T _e(t), wind energy conversion system machine torque T _W(t), provide corresponding electromagnetic torque setting value T _{E_ref}(t), thus realize the wind-driven generator speed governing through the regulator generator electromagnetic torque.The generator controlling electromagnetic torque that the present invention adopted is primarily aimed at the speed governing operation of large-scale wind driven generator.The large-scale wind driven generator rotary inertia is all very huge; Its speed responsive is slow, so the generator controlling electromagnetic torque mode basic thought that the present invention adopts is following: rise at wind speed, when requiring the wind-driven generator raising speed; In order to improve raising speed speed, make the low electromagnetic torque of generator output; And during wind speed decreased, when requiring the wind-driven generator reduction of speed,, make generator export higher electromagnetic torque in order to improve reduction of speed speed.Its given foundation and given result are following:

(1) if fast accelerated mode moves the given result of t moment secondary for wind-driven generator adopts, if T _e(t)＜T _W(t), T then _{E_ref}(t)=T _e(t), and keep this setting value constant, change up to the given result of the wind-driven generator secondary method of operation and give T more again _{E_ref}Assignment; If T _e(t)>=T _W(t), T then _{E_ref}(t)=0.95T _W(t);

(2) slow accelerated mode moves if the given result of secondary is for wind-driven generator adopts, then T _{E_ref}(t)=0.95T _W(t);

(3) if the given result of secondary has been operated in OOR for wind-driven generator, T then _{E_ref}(t)=T _W(t);

(4) slow ways of deceleration moves if the given result of secondary is for wind-driven generator adopts, then T _{E_ref}(t)=1.05T _W(t);

(5) if fast ways of deceleration moves the given result of t moment secondary for wind-driven generator adopts, if T _e(t)＞T _W(t), T then _{E_ref}(t)=T _e(t), and keep this setting value constant, change up to the given result of the wind-driven generator secondary method of operation and give T more again _{E_ref}Assignment; If T _e(t)≤T _W(t), T then _{E_ref}(t)=1.05T _W(t).

Claims (1)

1. the wind-power generator maximal wind-energy capture control method based on adaptation theory is characterized in that, at first from wind-driven generator incision wind speed V _{W_cut-in}Arrive rated wind speed V _{W_rated}Between, promptly the wind-power generator maximal wind-energy capture operating air velocity is interval, chooses some air speed value

I=1,2,3......n, the Δ V wind speed that with the unit is m/s are that then n wind speed point is INT (V at interval _{W_cut-in})+1, INT (V _{W_cut-in})+1+ Δ V,

INT (V _{W_cut-in})+1+2 * Δ V ... INT (V _{W_cut-in})+1+ (n-2) * Δ V, INT (V _{W_rated}), wherein, INT representes bracket function, n=[(INT (V _{W_rated})-(INT (V _{W_cut-in})+1))/Δ V]+1, at this moment, n wind speed point is according to initial optimum tip speed ratio λ _{Opt_ini}Can calculate n corresponding optimized rotating speed value Constitute selected rotating speed point range, establish each corresponding modifying factor M of these tachometer values _i, this rotating speed then

Maximum power value P after pairing the k time renewal _{Opt_Mi (k)}Be expressed as

P _{opt_Mi(k)}＝M _i(k)K _{opt_ini}(ω _i) ³

In the formula, M _i(k) expression is revised k=0,1,2...... the k time; Scaling factor K _{Opt_ini}Be expressed as

$K_{\mathrm{opt}\_\mathrm{ini}}=0.5\mathrm{\&rho;}{\mathrm{AR}}^3{C}_{P\max \_\mathrm{ini}}/{\mathrm{\&lambda;}}_{\mathrm{opt}\_\mathrm{ini}}^3$

In the formula, ρ is an air density; A is the wind energy conversion system wind sweeping area, A=π R ²R is the wind energy conversion system radius; C _{Pmax_ini}Be initial maximal wind-energy utilization factor; λ _{Opt_ini}Be initial optimum tip speed ratio; (C _{Pmax_ini}, λ _{Opt_ini}) be one group of optimum value of initial setting, and initial given M ₁(0)=M ₂(0)=... M _n(0)=M _Avg(0)=1, M wherein _AvgBe M _iThe mean value of ordered series of numbers, representation does

$M_{\mathrm{Avg}}\left(k\right)=\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{M}_i\left(k\right),$

This controlling method also comprises the following steps:

The first step: judge that the sampling tachometer value is whether in selected rotating speed point range

Judge the t tachometer value ω that samples constantly _r(t) whether in selected rotating speed point range, if ω _r(t) in selected tachometer value point range

Scope in, then get into second the step the wind-driven generator method of operation given for the first time; Otherwise the wind-driven generator running state secondary that directly got into for the 4th step is given, does not also upgrade M simultaneously _Avg, still adopt M _Avg(k-1) the peak output curve P of correspondence _{Opt_M_Avg (k-1)}, according to given result of the 4th step wind-driven generator is carried out torque control then;

Second step: the wind-driven generator method of operation is given for the first time

If power offset delta P _WBe meant the corresponding maximum power value P of a certain rotating speed _Opt(ω _r(t)) with wind-driven generator capturing wind energy power P this moment _W(t) difference, its representation does

ΔP _W(t)＝P _W(t)-P _opt(ω _r(t))

Got into for second step, ω then is described _r(t) equal

This moment Δ P _W(t) do

${\mathrm{\&Delta;P}}_W\left(t\right)=P_W\left(t\right)-P_{\mathrm{opt}\_\mathrm{Mi}\left(k\right)}\left({\mathrm{\&omega;}}_r^i\right)$

If $-{0.01P}_{\mathrm{Opt}\_\mathrm{Mi}\left(k\right)}\left({\mathrm{\&omega;}}_r^i\right)\&le;{\mathrm{\&Delta;\; P}}_W\left(t\right)\&le;{0.01P}_{\mathrm{Opt}\_\mathrm{Mi}\left(k\right)}\left({\mathrm{\&omega;}}_r^i\right),$ Explain that then wind-driven generator has been operated in the optimized working zone territory, be designated as OOR, then get into the 3rd step modifying factor and upgrade; Otherwise, if Explain that then wind-driven generator should quicken operation, if

Explain that then wind-driven generator should run slowly, under the both of these case, it is given directly to get into the 4th step wind-driven generator method of operation secondary, does not upgrade M _Avg, still adopt M _Avg(k-1) the peak output curve P of correspondence _{Opt_M_Avg (k-1)}, then wind-driven generator is carried out torque control;

The 3rd step: modifying factor is upgraded

It is according to the given result of a last control cycle wind-driven generator method of operation secondary that modifying factor is upgraded, a last control cycle wind-driven generator capturing wind energy power P _W(t-1) and this control cycle wind-driven generator capturing wind energy power P _W(t), current M _i(k) and upgraded M as a result last time _i(k-1) determine M jointly _iUpgrade M as a result k+1 time _i(k+1), its rule is as follows:

Should quicken operation if the given result of an a. last control cycle wind-driven generator method of operation secondary is a wind-driven generator, i.e. explanation wind-driven generator this moment gets into OOR, its M by acceleration mode _iTo upgrade result expression k+1 time following:

M _i(k)-d×(1-P _W(t-1)/P _W(t))×|M _i(k)-M _i(k-1)|＝M _i(k+1)

In the formula, d is a update coefficients; Regulation 1-P _W(t-1)/P _W(t) output is following:

$1-\frac{P_W(t-1)}{P_W\left(t\right)}=\left\{\begin{array}{cc}0,& \frac{P_W(t-1)}{P_W\left(t\right)}<0.9\mathrm{or}\frac{P_W(t-1)}{P_W\left(t\right)}>1.1\\ 1-\frac{P_W(t-1)}{P_W\left(t\right)},& 0.9\&le;\frac{P_W(t-1)}{P_W\left(t\right)}<1.1\end{array}\right.$

If the given result of a b. last control cycle wind-driven generator method of operation secondary is that wind-driven generator should run slowly, explain that promptly wind-driven generator gets into OOR, its M by deceleration regime _iTo upgrade result expression k+1 time following:

M _i(k)+d×(1-P _W(t-1)/P _W(t))×|M _i(k)-M _i(k-1)|＝M _i(k+1)

If the given result of a c. last control cycle wind-driven generator method of operation secondary is that wind-driven generator has been operated in OOR; Explain that promptly the wind-driven generator front and back all operate among the OOR twice; At first need do one section delay to system this moment; After postponing the control cycle end,, repeat this moment last to M if system judges that still wind-driven generator operates in OOR _iIdentical update mode gets final product; Otherwise system continues by former flow performing;

After above-mentioned rule completion renewal,

Corresponding M _i(k) will be updated to M _i(k+1), other rotating speed points

(j=1,2,3......n, still, the modifying factor M that j ≠ i) is corresponding _j(k), after the renewal, keep initial value constant, M _j(k+1) equal M _j(k) get final product; And M _Avg(k) will be updated to M _Avg(k+1);

The 4th step: wind-driven generator method of operation secondary is given

If carried out the 3rd step, ω _r(t) equal

Δ P then _W(t) do

${\mathrm{\&Delta;P}}_W\left(t\right)=P_W\left(t\right)-P_{\mathrm{opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)$

(1) if ${0.01P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)<{\mathrm{\&Delta;\; P}}_W\left(t\right),$ Explain that then wind-driven generator should quicken operation;

Wherein, if ${0.1P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)<{\mathrm{\&Delta;\; P}}_W\left(t\right),$ Then adopt fast accelerated mode operation;

If ${0.01P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)<{\mathrm{\&Delta;\; P}}_W\left(t\right)\&le;{0.1P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right),$ Then adopt slow accelerated mode operation;

(2) if $-0.01P_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)\&le;{\mathrm{\&Delta;\; P}}_W\left(t\right)\&le;{0.01P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right),$ Explain that then wind-driven generator has been operated in OOR;

(3) if ${\mathrm{\&Delta;\; P}}_W\left(t\right)<-{0.01P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right),$ Explain that then wind-driven generator should run slowly;

Wherein, if ${\mathrm{\&Delta;\; P}}_W\left(t\right)<-0.1P_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right),$ Then adopt fast ways of deceleration operation;

If $-{0.1P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right)\&le;{\mathrm{\&Delta;\; P}}_W\left(t\right)<-{0.01P}_{\mathrm{Opt}\_\mathrm{Mi}(k+1)}\left({\mathrm{\&omega;}}_r^i\right),$ Then adopt slow ways of deceleration operation;

If do not carry out for the 3rd step, Δ P then _W(t) do

ΔP _W(t)＝P _W(t)-P _{opt_M_Avg(k-1)}(ω _r(t))

(1) if 0.01P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t), explain that then wind-driven generator should quicken operation;

Wherein, if 0.1P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t), then adopt fast accelerated mode operation;

If 0.01P _{Opt_M_Avg (k-1)}(ω _r(t))＜Δ P _W(t)≤0.1P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt slow accelerated mode operation;

(2) if-0.01P _{Opt_M_Avg (k-1)}(ω _r(t))≤Δ P _W(t)≤0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), explain that then wind-driven generator has been operated in OOR;

(3) if Δ P _W(t)＜-0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), explain that then wind-driven generator should run slowly;

Wherein, if Δ P _W(t)＜-0.1P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt fast ways of deceleration operation;

If-0.1P _{Opt_M_Avg (k-1)}(ω _r(t))≤Δ P _W(t)＜-0.01P _{Opt_M_Avg (k-1)}(ω _r(t)), then adopt slow ways of deceleration operation;

The 5th step: generator controlling electromagnetic torque

According to the given result of the 4th step wind-driven generator method of operation secondary, generator electromagnetic torque T _e(t) and wind energy conversion system machine torque T _W(t), provide the electromagnetic torque setting value T of this control cycle _{E_ref}(t)

(1) if fast accelerated mode moves the given result of t moment secondary for wind-driven generator adopts, if T _e(t)＜T _W(t), T then _{E_ref}(t)=T _e(t), and keep this setting value constant, change up to the given result of the wind-driven generator secondary method of operation and give T more again _{E_ref}Assignment; If T _e(t)>=T _W(t), T then _{E_ref}(t)=0.95T _W(t);

(2) slow accelerated mode moves if the given result of secondary is for wind-driven generator adopts, then T _{E_ref}(t)=0.95T _W(t);

(3) if the given result of secondary has been operated in OOR for wind-driven generator, T then _{E_ref}(t)=T _W(t);

(4) slow ways of deceleration moves if the given result of secondary is for wind-driven generator adopts, then T _{E_ref}(t)=1.05T _W(t);

(5) if fast ways of deceleration moves the given result of t moment secondary for wind-driven generator adopts, if T _e(t)＞T _W(t), T then _{E_ref}(t)=T _e(t), and keep this setting value constant, change up to the given result of the wind-driven generator secondary method of operation and give T more again _{E_ref}Assignment; If T _e(t)≤T _W(t), T then _{E_ref}(t)=1.05T _W(t).

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