CN101571106B - Spindle-free variable-speed wind turbine generator and optimal power parameters acquisition method - Google Patents

Abstract

The invention provides a spindle-free variable-speed wind turbine generator and an optimal power parameters acquisition method, which belong to the technical field of wind power generation. The wind turbine generator comprises a blade, a variable-pitch bearing, a wind wheel hub, a flange, a main bearing, a cabin chassis, a wind turbine generator controller, a gearbox, a brake disc, a coupling, a wound rotor generator, a yaw rotation support, a tower and a wound-rotor-generator speed regulating device. The optimal power parameters acquisition method comprises the following steps: 1) feeding excitation current to a motor rotor; 2) obtaining electromagnetic torque; 3) determining target electromagnetic torque; and 4) changing the excitation current to regulate torque. The invention has the advantages that a spindle-free structure is adopted; the wind wheel hub is directly connected with an input shaft of a secondary planetary gearbox through the flange; the frontal thrust of a wind wheelis leaked out and passed to the tower directly through the cabin chassis; a transmission system is long in service life and simple in structure; the gearbox is long in service life and good in transmission stability; and a low-speed wound rotor alternator is high in alternator efficiency and low in power loss.

Description

Spindle-free variable-speed wind power generating set and optimal power parameters acquisition

Technical field

The invention belongs to technical field of wind power generation, particularly a kind of spindle-free variable-speed wind power generating set and optimal power parameters acquisition.

Background technique

The structural type of Large-scale Wind Turbines has varied, usually wind generating set structure is all traditional structural type, support transmission system by main shaft and main bearing, system architecture comprises main shaft, main bearing, gear-box, coupling and generator, the shortcoming of this kind structure wind-driven generator group is that the long weight of main shaft is large, manufacture cost is high, and the larger imbalance of reversing easily occurs in the dynamic torque transmission, makes troubles for generator set operation steady in a long-term and maintenance.

Summary of the invention

Deficiency for existing Large-scale Wind Turbines structural type, the invention provides a kind of spindle-free variable-speed wind power generating set and optimal power parameters acquisition, wind power generating set of the present invention is without main shaft structure, adopt Feng Lun Lun Grains directly to be connected with secondary planetary gear case low speed input shaft by flange plate, adopt the method for self study in the optimizing power obtaining method, good to reach transmission stability, generator efficiency is high, power loss is little, the purpose of reliable operation.

Technological scheme of the present invention is achieved in that this invention includes wind power generating set device and optimal power parameters acquisition, and wherein wind power generating set comprises blade, pitch bearing, Feng Lun Lun Grains, flange plate, main bearing, nacelle chassis, wind turbine group controller, gear-box, brake disc, coupling, wound rotor generator, driftage revolution support, pylon, wound rotor generator arrangements for speed regulation;

The parts of this wind power generating set connect: blade pass is crossed pitch bearing and is connected Feng Lun Lun Grains, Feng Lun Lun Grains connects main bearing, gear-box, brake disc, coupling and wound rotor generator successively by flange plate, main bearing, gear-box, brake disc, coupling and wound rotor generator all are positioned on the nacelle chassis, the wind turbine group controller is positioned at the nacelle chassis rear portion, nacelle chassis is by driftage revolution support and connection pylon, wound rotor generator arrangements for speed regulation are assemblied in the pylon, and the said gear case is the secondary planet step-up gear.

Described wound rotor generator arrangements for speed regulation, for generator provides the field current of frequency change, these winding rotor motor arrangements for speed regulation comprise frequency-adjustable speed-adjustable control gear, blower fan master controller, monitor controller, rotating speed coder, the first analog acquisition plate, the second analog acquisition plate, IGBT module 1, IGBT module 2, IGBT module 3, IGBT module 4, IGBT module 5, IGBT module 6, trigger signal tablet; Wherein the frequency-adjustable speed-adjustable control gear comprises CPU board, rotor-side DSP control panel, net side DSP control panel;

The connection of this device is: blower fan master controller, monitor controller, rotor-side DSP control panel, net side DSP control panel, the first analog acquisition plate, the second analog acquisition plate connect respectively CPU board, CPU board connects the trigger signal tablet, rotating speed coder connects rotor-side DSP control panel, rotor-side DSP control panel connects the trigger signal tablet by IGBT module 4, IGBT module 5, IGBT module 6, and net side DSP control panel connects the trigger signal tablet by IGBT module 1, IGBT module 2, IGBT module 3.

Adopt wound rotor generator arrangements for speed regulation excitation speed regulation process as follows:

Choose wound rotor electromagnetic energy equation of equilibrium sP _t=P ₂-r ₂I ₂ ²Push away to get field current I ₂With blade rotational speed N _rRelation shown in formula (1),

In the formula: N _gBe synchronous speed, inferior horn g represents motor; N _r: be wheel speed, inferior horn r represents wind wheeling rotor; r ₂Be rotor resistance; $P_t=\frac{1}{2}\mathrm{\ρ\πA}{V}^3{C}_P\mathrm{\η}$ Mechanical total output for unit; A is the few wind area of wind wheel; C _pBe power coefficient; V is wind speed; η is the transmission system efficiency of transmission; P ₁Be stator power; P ₂For rotor has power; P ₂=U ₂I ₂COS φ; U ₂Be the rotor input voltage; COS φ is power factor;

The wind turbine group controller is with mutual inductor data measured Nr, P in the blower fan master controller _t, P ₂, U ₂, V sends to CPU board in the wound rotor generator arrangements for speed regulation, calculate the field current basic value by formula (1), DC component for the amplitude modulation of rotor-side dsp board, then exporting modulation frequency is the switching signal of IGBT module 4, IGBT module 5, IGBT module 6, output terminal output AC field current in above-mentioned IGBT module, send into again in the rotor winding, by passing through to regulate field current I in the formula (1) ₂And then adjusting vane rotational speed N _r, the variation of field current is equivalent to generation rotary magnetic field and changes, i.e. T _gElectromagnetic torque also changes, and realizes electromagnetic power adjustment and variable-speed operation.

Adopt wound rotor generator arrangements for speed regulation excitation frequency-modulating process as follows: the IGBT module 1 of wound rotor generator arrangements for speed regulation, IGBT module 2, IGBT module 3 are debugged in the net side, the frequency modulation electric current of IGBT module 4, IGBT module 5, the IGBT module 6 outputs rotor of feeding, generator is carried out excitation frequency modulation, the frequency of field current is determined by formula (2), for realize generator amature synchronously ± scope of 30% rotating speed in, stator constant frequency 50Hz generator operation, the wound rotor number of pole-pairs is made as p, the tightly interlock of rotor magnetic pole and magnetic pole of the stator is at wind wheel T _AreoPneumatic torque promotes lower rotary electrification.

The arrangements for speed regulation of wound rotor generator provide field current for rotor in the unit of the present invention, keep stator frequency f by formula (2) ₁=50Hz is because wheel speed N _rChange rotor frequency f ₂Along with N _rVariation regulate and rotor frequency f ₂Adjusting need the frequency modulation electric current rotor of feeding, generator is carried out excitation frequency modulation, namely calculate the frequency of electric current, calculate IGTB module switch modulation frequency by rotor-side DSP control panel, net side DSP control panel again, guarantee wind power generating set variable speed constant frequency operation generating.

$f_2=f_1-\frac{{\mathrm{pN}}_r}{60},(N_r<N_g)$

$f_2=\frac{{\mathrm{pN}}_r}{60}-{\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="H2009100119170E00021.png"\; state="\{\{state\}\}">f</figure-callout>}}_1,(N_r<N_g)---\left(2\right)$

Middle f ₁Be the aerogenerator stator frequency; f ₂Be the wind power generator rotor frequency;

Wind power generating set is subject to wind speed direction and the constantly impact of variation of size usually, wind speed changes and causes that at first its acceleration of rotation speed change is definite by formula (3), speed reaches stable rear wind wheel blade and does not reach the optimal power acquisition point, to obtain the optimizing power parameter of the wind turbine that links to each other with Feng Lun Lun Grains, make wind wheel blade reach the optimal power acquisition point by speed regulating control; The present invention adopts the theoretical power (horse-power) value of measured value and table 1, and method of successive approximation is carried out torque control, realizes the variable-speed operation of wind-powered electricity generation unit.

$\stackrel{\&CenterDot;}{\mathrm{\&omega;}}=\frac{1}{J}(T_{\mathrm{areo}}-T_g)---\left(3\right)$

In the formula

Be angular acceleration; T _AreoBe pneumatic torque; T _gBe electromagnetic torque.

It is as follows with the optimizing power parametric technique that obtains the wind turbine that links to each other with Feng Lun Lun Grains to adopt the spindle-free variable-speed wind power generating set to carry out speed regulating control:

1) adopt wound rotor generator arrangements for speed regulation rotor side dsp controller and IGBT module 4, IGBT module 5, IGBT module 6 to add field current to the rotor feedback, change the rotor electromagnetic torque, by energy conservation, P _t=P _G/ η=T _gN _g/ η, P in the formula _gBe power of motor, N _gBe synchronous speed, η is the transmission system efficiency of transmission, T _gElectromagnetic torque, the electromagnetic torque of motor changes and causes rotation speed change, and blower fan is controlled in the speed range of blade design automatically;

2) the electromagnetic torque T that adopts wound rotor generator arrangements for speed regulation apoplexy owner controller to obtain for any time the k time test _g(k), according to actual measurement wind speed V _iIn table 1, find T _Gi, be unit static object electromagnetic torque;

3) determine that with online test mode the target electromagnetic torque in this moment is

T _g0(k)＝μ(k)T _gi， (4)

In the formula: T _GiBe static torque; μ _iBe the static torque correction factor;

Table look-up by current i wind speed bin value and 1 to determine; Real-time the k time target torque correction factor μ (k)=μ _i+ Δ μ (k), Δ μ (k) is real-time dynamic torque correction factor here, calculated by formula (5) (6),

Δμ(k)＝γ _i sgn[μ(k-n)]sgn[ΔC _p(k)]|Cp(k)| ^0.5 (5)

In the formula: best power parameter variation Δ C _p(k)=C _p(k)-C _p(k-n), wherein: C _p(k-n), the power transfer parameter during last control, γ _iBe conversion coefficient, determined by table 1 according to current wind speed; N is current summed data number,

$C_p\left(k\right)=\frac{\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{\&omega;}(k-n+i)[T_g(k-n+i)+J\stackrel{\&CenterDot;}{\mathrm{\&omega;}}(k-n+i)]}{\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}0.5{\mathrm{\&rho;Av}}^3\cos \mathrm{\&psi;}(k-n+i)}---\left(6\right)$

In the formula: ρ is air density; J is rotary inertia; ψ is yaw angle; A is wind sweeping area; ω is the angular velocity of wind wheel; V is wind speed;

4) real-time dynamic torque correction factor Δ μ (k) is by the optimizing power parameters C _p(k) and variation tendency decide, calculated according to formula (4) (5) (6) by controller of fan CPU during enforcement, at first calculate motor target torque T _G0(k), then with the actual torque T that adopts wound rotor generator arrangements for speed regulation apoplexy owner controller to record _g(k) subtract each other to such an extent that the torque deviation value is sent into pi regulator, wound rotor generator arrangements for speed regulation are directly sent in regulator output, change field current and realize regulating torque, reach speed Control.

Advantage of the present invention: this device adopts without main shaft structure, Feng Lun Lun Grains directly is connected with secondary planetary gear case low speed input shaft by flange plate, the positive thrust of wind wheel is directly released by the domain, cabin and is passed to pylon, the transmission system life-span is long, simple in structure, the gear-box life-span is long, and transmission stability is good, slow-speed of revolution wound rotor alternative electric generation engine efficiency is high, and power loss is little.

Description of drawings

Fig. 1 is spindle-free variable-speed wind generating set structure schematic diagram of the present invention;

Fig. 2 is spindle-free variable-speed wind generating set structure plan view of the present invention;

Fig. 3 is wound rotor generator arrangements for speed regulation skeleton diagram in the spindle-free variable-speed wind power generating set of the present invention;

Fig. 4 is wound rotor generator arrangements for speed regulation excitation frequency modulation electrical schematic diagram in the spindle-free variable-speed wind power generating set of the present invention;

Fig. 5 is wound rotor structure principle chart in the spindle-free variable-speed wind power generating set of the present invention;

Fig. 6 is wound rotor left view in the spindle-free variable-speed wind power generating set of the present invention;

Fig. 7 is that spindle-free variable-speed of the present invention is controlled electric functional-block diagram.

Among the figure: 1 blade, 2 pitch bearings, 3 Feng Lun Lun Grains, 4 flange plate, 5 main bearings, 6 nacelle chassis, 7 gear-boxes, 8 brake discs, 9 coupling, 10 wound rotor generators, 11 driftage revolutions are supported, 12 pylons.

Embodiment

The detailed process of spindle-free variable-speed wind power generating set of the present invention and optimal power parameters acquisition in conjunction with the embodiments 1.0 wind-powered electricity generation unit power characteristic tables is that example describes.

This invention includes wind power generating set device and optimal power parameters acquisition, wherein this wind generating set structure comprises blade 1, pitch bearing 2, Feng Lun Lun Grains 3, flange plate 4, main bearing 5, nacelle chassis 6, wind turbine group controller, gear-box 7, brake disc 8, coupling 9, wound rotor generator 10, driftage revolution support 11, pylon 12, wound rotor generator arrangements for speed regulation as shown in Figure 1, 2.

The connection of this wind power generating set is: blade 1 connects Feng Lun Lun Grains 3 by pitch bearing 2, Feng Lun Lun Grains 3 connects main bearing 5 successively by flange plate 4, gear-box 7, brake disc 8, coupling 9 and wound rotor generator 10, main bearing 5, gear-box 7, brake disc 8, coupling 9 and wound rotor generator 10 all are positioned on the nacelle chassis 6, the wind turbine group controller is positioned at nacelle chassis 6 rear portions, nacelle chassis 6 supports 11 by the driftage revolution and connects pylon 12, wound rotor generator arrangements for speed regulation are assemblied in the pylon, the structure of wound rotor such as Fig. 5, shown in 6, said gear case 7 is the secondary planet step-up gear.

The arrangements for speed regulation of described wound rotor generator as shown in Figure 3, this device is assemblied in the pylon 12, for generator provides the field current of frequency change, the arrangements for speed regulation of this wound rotor generator comprise frequency-adjustable speed-adjustable control gear, blower fan master controller, monitor controller, rotating speed coder, the first analog acquisition plate, the second analog acquisition plate, IGBT module 1, IGBT module 2, IGBT module 3, IGBT module 4, IGBT module 5, IGBT module 6, trigger signal tablet; Wherein the frequency-adjustable speed-adjustable control gear comprises CPU board, rotor-side DSP control panel, net side DSP control panel.

The annexation of this device: blower fan master controller, monitor controller, rotor-side DSP control panel, net side DSP control panel, the first analog acquisition plate, the second analog acquisition plate connect respectively CPU board, CPU board connects the trigger signal tablet, rotating speed coder connects rotor-side DSP control panel, rotor-side DSP control panel connects the trigger signal tablet by IGBT module 4, IGBT module 5, IGBT module 6, and net side DSP control panel connects the trigger signal tablet by IGBT module 1, IGBT module 2, IGBT module 3.

Adopt wound rotor generator arrangements for speed regulation excitation speed regulation process as follows:

Choose wound rotor electromagnetic energy equation of equilibrium sP _t=P ₂-r ₂I ₂ ²Push away to get field current I ₂With rotational speed N _rRelation shown in formula (1),

In the formula: N _gBe synchronous speed, inferior horn g represents motor; N _rBe wheel speed, inferior horn r represents wind wheeling rotor; r ₂Be rotor resistance

$P_t=\frac{1}{2}\mathrm{\&rho;\&pi;A}{V}^3{C}_P\mathrm{\&eta;}$ Mechanical total output for unit; A is the few wind area of wind wheel; C _pBe power coefficient; V is wind speed; η is the transmission system efficiency of transmission; P ₁Be stator power; P ₂For rotor has power; P ₂=U ₂I ₂COS φ; U ₂Be the rotor input voltage; COS φ is power factor; When unit at specified 1650rpm/min, r ₂=1.63 Europe, generator amature exciting power P ₂=180kw, generator rating power P _t=1000kw calculates field current I ₂=324.6A.

The wind turbine group controller records signal N with mutual inductor in the blower fan master controller _r, P _t, P ₂, U ₂, V delivers to wound rotor generator arrangements for speed regulation CPU board, calculate the field current basic value by formula (1), DC component for the amplitude modulation of rotor-side dsp board, then exporting modulation frequency is the switching signal of IGBT module 4, IGBT module 5, IGBT module 6, the output terminal output AC field current of above-mentioned IGBT module, send in the rotor winding, by passing through to regulate field current I in the formula (1) ₂And then adjusting vane rotational speed N _r, the variation of field current is equivalent to generation rotary magnetic field and changes, i.e. T _gElectromagnetic torque also changes, and realizes electromagnetic power adjustment and variable-speed operation.

Adopt wound rotor generator arrangements for speed regulation excitation frequency-modulating process as follows: IGBT module 1, IGBT module 2, IGBT module 3 are to debug in the net side, the frequency modulation electric current of IGBT module 4, IGBT module 5, the IGBT module 6 outputs rotor of feeding, generator is carried out excitation frequency modulation, the frequency of field current is determined by formula (2), for realize generator amature synchronously ± scope of 30% rotating speed in, stator constant frequency 50Hz generator operation, the wound rotor number of pole-pairs is made as p, the tightly interlock of rotor magnetic pole and magnetic pole of the stator is at wind wheel T _AreoPneumatic torque promotes lower rotary electrification.

Wound rotor generator arrangements for speed regulation provide field current for rotor in the unit of the present invention, keep stator frequency f by formula (2) ₁=50Hz is because wheel speed N _rChange rotor frequency f ₂Along with N _rVariation regulate and rotor frequency f ₂Adjusting need the frequency modulation electric current rotor of feeding, generator is carried out excitation frequency modulation, namely calculate the frequency of electric current, rotor-side DSP control panel, net side DSP control panel by (shown in Figure 3) calculates IGTB module switch modulation frequency again, guarantee wind power generating set variable speed constant frequency operation generating, Excitation Adjustment frequency circuit principle as shown in Figure 4

$\begin{array}{cc}{f}_2=f_1-\frac{p{N}_r}{60}& (N_r<N_g)\\ f_2=\frac{{\mathrm{pN}}_r}{60}-f_1& (N_r<N_g)\end{array}---\left(2\right)$

F in the formula ₁Be the aerogenerator stator frequency; f ₂Be the wind power generator rotor frequency;

When unit at specified 1650rpm/min, r ₂=1.63 Europe, the rotor-exciting frequency f ₂=50-4*1650/60=5Hz, this moment rotor field current frequency 5Hz, the size of electric current is 342.6A.

Wind power generating set is subject to wind speed direction and the constantly impact of variation of size usually, wind speed changes and causes that at first its acceleration of rotation speed change is definite by formula (3), speed reaches stable rear wind wheel blade and does not reach the optimal power acquisition point, the present invention adopts the theoretical power (horse-power) value of measured value and table 1, method of successive approximation is carried out torque control, realizes the variable-speed operation of wind-powered electricity generation unit.

$\stackrel{\&CenterDot;}{\mathrm{\&omega;}}=\frac{1}{J}(T_{\mathrm{areo}}-T_g)---\left(3\right)$

In the formula

Be angular acceleration; T _AreoBe pneumatic torque; T _gBe electromagnetic torque;

It is as follows with the optimizing power parametric technique that obtains the wind turbine that links to each other with Feng Lun Lun Grains to adopt the spindle-free variable-speed wind power generating set to carry out speed regulating control:

1) adopt as shown in Figure 4 speed change control circuit, adopt wound rotor generator arrangements for speed regulation rotor side dsp controller and IGBT module 4, IGBT module 5, IGBT module 6 to add field current to the rotor feedback, change the rotor electromagnetic torque, by energy conservation, P _t=P _G/ η=T _gN _g/ η, P in the formula _gBe power of motor, N _gBe synchronous speed, η is the transmission system efficiency of transmission, T _gElectromagnetic torque, the electromagnetic torque of motor changes and causes rotation speed change, and blower fan is controlled in the speed range of blade design automatically;

2) the electromagnetic torque T that adopts wound rotor generator arrangements for speed regulation blower fan master controller to obtain for any time the k time test _g(k), according to actual measurement wind speed V _iIn table 1, find T _Gi, be unit static object electromagnetic torque; Such as V _i=6m/s, 1T tables look-up _Gi=75.25kK;

3) determine that with online test mode the target electromagnetic torque in this moment is

T _g0(k)＝μ(k)T _gi， (4)

In the formula: T _GiBe static torque; μ (k)=μ _i+ Δ μ (k) is μ (k) torque modification coefficient, μ _iBe the static torque correction factor, table look-up by current i wind speed bin value and 1 determine; Such as V _i=6m/s, 1 μ tables look-up _i=0.98, γ _i=2.6 μ (k) wind wheel rotary inertia J=1822264kgm, real-time the k time target torque correction factor μ (k)=μ _i+ Δ μ (k), T _g(k)=and 65kN: the dynamic torque correction factor is calculated by formula (5) (6) in real time

Δμ(k)＝γ _i sgn[μ(k-n)]sgn[ΔC _p(k)]|Cp(k)| ^0.5 (5)

In the formula: power factor variation Δ C _p(k)=C _p(k)-C _p(k-n), wherein: C _pPower conversion coefficient when (k-n), the last time is controlled; γ _iBe conversion coefficient, determined by table 1 according to current wind speed; N is current summed data number;

$C_p\left(k\right)=\frac{\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{\&omega;}(k-n+i)[T_g(k-n+i)+J\stackrel{\&CenterDot;}{\mathrm{\&omega;}}(k-n+i)]}{\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}0.5{\mathrm{\&rho;<figure-callout\; id="3"\; label="Av"\; filenames="H2009100119170E00011.png"\; state="\{\{state\}\}">Av</figure-callout>}}^3\cos \mathrm{\&psi;}(k-n+i)}---\left(6\right)$

In the formula: ρ is air density; J is rotary inertia; ψ is yaw angle; A is wind sweeping area; ω is the angular velocity of wind wheel; V is wind speed; Calculate C by formula (5) (6) _p(k)=0.41033, initial C _p(k-n)=0.47036, then calculate Δ μ (k)=2.6*0.06**0.641=0.0156, μ (k)=1.2756;

4) real-time dynamic torque correction factor Δ μ (k) is mainly by power factor C _p(k) and variation tendency decide, the CPU by controller of fan during enforcement calculates according to formula (4) (5) (6), at first calculates as shown in Figure 7 motor target torque T _G0(k)=T _Gi* μ (k), μ (k)=1.2756+0.0156=1.2912 here, T _G0, the actual torque T that then=75.251.2*756=95.98kN records with the blower fan master controller of wound rotor generator arrangements for speed regulation _g(k) subtract each other to such an extent that torque deviation value 20.73kN sends into pi regulator, regulator output is directly sent into the wound rotor generator arrangements for speed regulation of (as shown in Figure 4) and is carried out excitation frequency modulation, changes field current and realizes regulating torque, reaches the purpose of speed Control.

Table 1 wind wheel output characteristics table

Sequence number i

Wind speed V i

Wind speed round

Power (kw)

Torque

Initial power

The torque modification coefficient

Conversion coefficient γ i

	(m/s)	N r(r/min)	P t	T gi(kN.m)	Rate coefficient	μi
									1	4	12.00	19.4	15.43917	0.47036	1	2.2
2	4.5	12.15	34.0	26.72428	0.47036	1	2.3
								3	5	13.50	52.8	37.35111	0.47036	1	2.3
4	5.5	14.85	75.8	48.7468	0.47036	1.21	2.5
								5	6	16.20	103.9	61.24969	0.47036	1.24	2.7
6	6.5	17.55	138.3	75.25726	0.47036	1.26	2.6
								7	7	18.90	179.6	90.75026	0.47036	1.27	2.8
8	7.5	20.25	228.3	107.6674	0.47034	1.29	2,4
								9	8	21.50	285.2	126.6819	0.46475	1.30	2.3
10	8.5	21.50	390	173.2326	0.4572	1.31	2.2
								11	9	21.50	598.9	266.023	0.45004	1.32	2.1
12	9.5	21.50	625	277.6163	0.4361	1.33	2.15
								13	10	21.50	795.6	353.3944	0.42772	1.33	2.
14	10.5	21.50	950	421.9767	0.41921	1.33	2
								15	11	21.5	1050	466.3953	0.40853	1.33	2
16	12	21.5	1050	467.012	0.35410	1.42	2.1

Claims (1)

1. the optimal power parameters acquisition of a spindle-free variable-speed wind power generating set is characterized in that: this wind power generating set comprises that blade (1), pitch bearing (2), wind wheel hub (3), flange plate (4), main bearing (5), nacelle chassis (6), wind turbine group controller, gear-box (7), brake disc (8), coupling (9), wound rotor generator (10), driftage revolution support (11), pylon (12), wound rotor generator arrangements for speed regulation; The connection of this wind power generating set is: blade (1) connects Feng Lun Lun Grains (3) by pitch bearing (2), Feng Lun Lun Grains (3) connects main bearing (5) successively by flange plate (4), gear-box (7), brake disc (8), coupling (9) and wound rotor generator (10), main bearing (5), gear-box (7), brake disc (8), coupling (9) and wound rotor generator (10) all are positioned on the nacelle chassis (6), the wind turbine group controller is positioned at nacelle chassis (6) rear portion, nacelle chassis (6) supports (11) by the driftage revolution and connects pylon (12), and wound rotor generator arrangements for speed regulation are assemblied in the pylon (12);

Described gear-box (7) is the secondary planet step-up gear;

Described wound rotor generator arrangements for speed regulation comprise frequency-adjustable speed-adjustable control gear, blower fan master controller, monitor controller, rotating speed coder, the first analog acquisition plate, the second analog acquisition plate, IGBT module 1, IGBT module 2, IGBT module 3, IGBT module 4, IGBT module 5, IGBT module 6, trigger signal tablet; Wherein the frequency-adjustable speed-adjustable control gear comprises CPU board, rotor-side DSP control panel, net side DSP control panel; The connection of winding rotor motor arrangements for speed regulation is: blower fan master controller, monitor controller, rotor-side DSP control panel, net side DSP control panel, the first analog acquisition plate, the second analog acquisition plate connect respectively CPU board, CPU board connects the trigger signal tablet, rotating speed coder connects rotor-side DSP control panel, rotor-side DSP control panel connects the trigger signal tablet by IGBT module 4, IGBT module 5, IGBT module 6, and net side DSP control panel connects the trigger signal tablet by IGBT module 1, IGBT module 2, IGBT module 3;

This optimal power parameters acquisition is as follows:

1) adopt wound rotor generator arrangements for speed regulation rotor side dsp controller and IGBT module 4, IGBT module 5, IGBT module 6 to add field current to the generator amature feedback, change the rotor electromagnetic torque, by energy conservation, P _t=P _g/ η=T _gN _g/ η, P in the formula _gBe generator power, N _gBe synchronous speed, η is the transmission system efficiency of transmission, T _gElectromagnetic torque, the electromagnetic torque of generator changes and causes rotation speed change, and blower fan is controlled in the speed range of blade design automatically;

2) the electromagnetic torque T that adopts wound rotor generator arrangements for speed regulation apoplexy owner controller to obtain for any time the k time test _g(k), by actual measurement wind speed V _iObtain T _Gi, be unit static object electromagnetic torque;

3) determine that with online test mode the target electromagnetic torque in this moment is

T _g0(k)= μ(k）T _gi,

In the formula: T _GiBe static torque; μ _iBe the static torque correction factor;

Determine by current i wind speed bin value; Real-time the k time target torque correction factor μ (k)=μ _i+ △ μ (k), here △ μ (k): the dynamic torque correction factor is calculated by following formula in real time,

△μ(k)=γ _i sgn[μ(k-n)]sgn[△C _p(k)]|Cp(k)| ^0.5

In the formula: best power parameter variation △ C _p(k)=C _p(k)-C _p(k-n), wherein: C _p(k-n), the power transfer parameter during last control, γ _iBe conversion coefficient; N is current summed data number;

$C_p\left(k\right)=\frac{\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}\mathrm{\&omega;}(k-n+i)[T_g(k-n+i)+\mathrm{J\&omega;}(k-n+i)]}{\frac{1}{n}\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}0.5\mathrm{\&rho;A}{\mathrm{\&nu;}}^3\cos \mathrm{\&psi;}(k-n+i)}$

In the formula: ρ is air density; J is rotary inertia; ψ is yaw angle; A is wind sweeping area; ω is the angular velocity of wind wheel; V is wind speed;

4) real-time dynamic torque correction factor △ μ (k) is by the optimizing power parameters C _p(k) and variation tendency decide, calculated according to above-mentioned formula by blower fan master controller CPU during enforcement, at first calculating generator target torque T _G0(k), then with the actual torque T that adopts wound rotor generator arrangements for speed regulation apoplexy owner controller to record _g(k) subtract each other to such an extent that the torque deviation value is sent into pi regulator, wound rotor generator arrangements for speed regulation are directly sent in regulator output, change field current and realize regulating torque, reach speed Control.

Images