CN101907071A - Online anti-icing and de-icing device for wind turbine - Google Patents

Abstract

The invention discloses an online anti-icing and de-icing device for a wind turbine, comprising an ultrasonic generator (1) and a de-icing unit (2) which is used for generating ultrasonic Lamb waves and horizontal shear waves on the surface of a wind turbine vane (3), wherein the de-icing unit (2) comprises a plurality of piezoelectric transducers (21) arranged on the inner surface of the wind turbine vane (3), and the input end of each piezoelectric transducer (21) is respectively connected with the output end of the ultrasonic generator (1). The invention can realize online anti-icing and de-icing of the wind turbine vane without damaging wind turbine vane materials and has the advantages of low energy consumption, low cost and simple maintenance.

Description

Online anti-icing and de-icing device for wind turbine

Technical field

The present invention relates to equipment deicing field, be specifically related to a kind of online anti-icing, deicer that is used for the wind energy conversion system of wind-power electricity generation.

Background technique

Wind energy is very important and reserves are huge safety, clear energy sources, wind-power electricity generation are the principal modes of Wind Power Utilization.Yet be installed in the wind power generating set of cold area, the ice formation issues of wind machine oar leaf is one of principal element that influences its safety reliability, when a large amount of icing of wind machine oar leaf, will produce following having a strong impact on:

(1) roughness of airfoil surface increase, aerofoil profile change, thereby reduce the aerodynamic characteristic of wind machine oar leaf, cause the efficient of wind energy conversion system to reduce, and the power output of unit reduces; To cause the wind power generating set non-programmed halt during serious icing, influence the safe and stable operation of network system.

(2) quality of blade increases, thereby has increased the load of rotor, and makes rotor produce mass unbalance, causes rotor and driveline vibrations, causes the damage of bearings and the wind machine oar leaf fatigue fracture of wind machine oar leaf.

For these reasons, research cold area in winter particularly anti-icing, the deicing technology of clammy regional wind machine oar leaf, for wind energy turbine set and large scale wind power machine safe, economical, efficiently move and have great importance.But, also there is not ripe wind machine oar leaf deicing technology at present, for the wind machine oar leaf icing, one is taked to shut down and handles, and has influenced the normal operation of network system, has limited the utilization to wind energy.

Summary of the invention

The present invention is directed to the shortcoming of above-mentioned prior art, provide a kind of and can realize the online anti-icing and deicing of wind energy conversion system, have the online anti-icing and de-icing device for wind turbine that does not damage wind machine oar leaf material, energy consumption is low, cost is low, easy to maintenance advantage.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of online anti-icing and de-icing device for wind turbine, it comprises ultrasonic generator and is used for producing on the surface of wind machine oar leaf the deicing unit of ultrasonic Lamb wave and horizontal shear wave, described deicing unit is made up of a plurality of piezoelectric transducers of being located at the wind machine oar leaf internal surface, and the input end of described piezoelectric transducer links to each other with the output terminal of described ultrasonic generator respectively.

As a further improvement on the present invention:

Described piezoelectric transducer is a strip, and each piezoelectric transducer is the array configuration distribution along same direction in the described deicing unit.

Distance L in the described deicing unit between two adjacent piezoelectric transducers of parallel distribution is:

L＝(n+1/2)λ _R，

Wherein n is a natural number, λ _RThe wavelength that ultrasonic Lamb wave that produces for described deicing unit or horizontal shear wave are propagated on the surface of wind machine oar leaf;

Described piezoelectric transducer is along the length direction setting of described wind machine oar leaf;

The matrix of described piezoelectric transducer is a piezoelectric ceramic, and the both sides of described piezoelectric ceramic are installed with metal film respectively, and described metal film links to each other with the output terminal of described ultrasonic generator respectively;

The length a of described deicing unit be wind machine oar leaf entire length A 2/3, and described wind machine oar leaf is located at by a side of root in the deicing unit;

The width b of described deicing unit is 1/3 of wind machine oar leaf integral width B.

Described ultrasonic generator is installed in the cabin body of wind energy conversion system.

The present invention has following advantage: the deicing unit of being located at the internal surface of wind machine oar leaf among the present invention can be at ultrasonic Lamb wave of wind machine oar leaf surface excitation and horizontal shear wave; can be under non-stop-machine situation; wind machine oar leaf is realized online anti-icing and deicing; under the prerequisite of not damaging the wind machine oar leaf material; can effectively prevent and eliminate the ice formation issues of wind machine oar leaf; significantly reduce the non-programmed halt of wind energy conversion system; guarantee that wind energy conversion system provides lasting power supply at cold snap; improve the Wind Power Utilization efficient of wind energy conversion system, have and do not damage the wind machine oar leaf material; energy consumption is low; cost is low; the advantage of not having the phenomenon of heavily freezing.

Piezoelectric transducer is that the distance L between two adjacent piezoelectric transducers of strip and parallel distribution is L=(n+1/2) λ _R, can improve the Energy Efficiency Ratio of deicing unit excitation ultrasound Lamb wave or horizontal shear wave; Piezoelectric transducer makes piezoelectric transducer can paste the surface of wind machine oar leaf as far as possible along the length direction setting of wind machine oar leaf, can effectively improve the anti-icing and deicing ability of deicing unit on the wind machine oar leaf surface; The matrix of piezoelectric transducer is piezoelectric ceramic, and is simple in structure, and cost is low.

Wind machine oar leaf is located at by a side of root in the deicing unit, and length be wind machine oar leaf length 2/3, width is 1/3 of wind machine oar leaf width, and is less to the load influence of wind machine oar leaf; In addition, ultrasonic generator is located in the cabin of wind energy conversion system, can further reduce the load of wind machine oar leaf, can effectively guarantee the Wind Power Utilization efficient of wind energy conversion system.

Description of drawings

Fig. 1 is installed on structural representation on the wind energy conversion system for the embodiment of the invention;

Fig. 2 is the structural representation of deicing unit in the embodiment of the invention;

Fig. 3 is the deicing principle schematic of the embodiment of the invention;

Fig. 4 is the structural representation of piezoelectric transducer in the embodiment of the invention;

Fig. 5 be in the embodiment of the invention deicing unit at the mounting structure schematic representation of wind machine oar leaf width direction;

Fig. 6 be in the embodiment of the invention deicing unit at the mounting structure schematic representation of wind machine oar leaf length direction;

Fig. 7 is the structural representation of ultrasonic generator in the embodiment of the invention.

Embodiment

As depicted in figs. 1 and 2, online anti-icing and de-icing device for wind turbine in the present embodiment comprises ultrasonic generator 1 and is used for producing on the surface of wind machine oar leaf 3 the deicing unit 2 of ultrasonic Lamb wave and horizontal shear wave, deicing unit 2 is made up of a plurality of piezoelectric transducers 21 of being located at wind machine oar leaf 3 internal surfaces, and the input end of piezoelectric transducer 21 links to each other with the output terminal of ultrasonic generator 1 respectively.

In the present embodiment, ultrasonic generator 1 is installed in the cabin body of wind energy conversion system, piezoelectric transducer 21 is a strip, each piezoelectric transducer 21 is the array configuration distribution along same direction in the deicing unit 2, for excitation ultrasound Lamb wave (Lamb ripple) or horizontal shear wave (SH ripple) better, the distance L between two adjacent piezoelectric transducers 21 of parallel distribution is L=(n+1/2) λ _R, wherein n is a natural number, the value of n is decided by the area of influence of piezoelectric transducer 21, λ _RBe the wavelength that ultrasonic Lamb wave that deicing unit 2 produces or horizontal shear wave are propagated on the surface of wind machine oar leaf 3, i.e. two times of distance between two adjacent piezoelectric transducers 21 of parallel distribution equal the odd-multiple of the wavelength that ultrasonic Lamb wave or horizontal shear wave propagate on the surface of wind machine oar leaf 3.In the present embodiment, wind machine oar leaf 3 adopts glass fiber compound material to make, the frequency of the high frequency ac signal of ultrasonic generator 1 output is that 300khz, velocity of wave are 1120m/s during deicing, the wavelength that the Lamb ripple is propagated on the surface of wind machine oar leaf 3 is 3.73mm, excite the effect of Lamb ripple best in order to make, the distance L between two adjacent piezoelectric transducers 21 of adjacent distributions is (n+1/2) * 3.73mm.The aerofoil section of wind machine oar leaf 3 is shaped as drops in the present embodiment, piezoelectric transducer 21 is along the length direction setting of wind machine oar leaf 3, make to have the gap between the surface that can not cause piezoelectric transducer 21 and wind machine oar leaf 3 when piezoelectric transducer 21 is installed, can effectively improve the stability and the anti-icing and deicing efficient of piezoelectric transducer 21 because of the aerofoil section shape of wind machine oar leaf 3.

As shown in Figure 3, when wind machine oar leaf 3 was coated with ice sheet 4, the direction of propagation of Lamb was X ₁And X ₃, the SH direction of wave travel is along X ₁, the displacement of particle is along X ₂, then the governing equation of this two-layer system under Lamb ripple and the effect of SH ripple is:

$\mathrm{\&rho;}\frac{{\&PartialD;}^2{u}_i}{{\&PartialD;\mathrm{<figure-callout\; id="2"\; label="t"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">t</figure-callout>}}^2}=C_{\mathrm{ijkl}}\frac{{\&PartialD;}^2{u}_i}{{\&PartialD;x}_j{\&PartialD;x}_k}$

In the formula, ρ is the density of material, C _IjklBe the rigidity tensor, u _iBe displacement field, C _IjklCan be converted into the rigidity tensor C of material _Nm, i wherein, l is free subscript, j, k is summation subscript, t express time, x _j, x _kBe direction.

The general solution of following formula is:

$u_i=U_i{e}^{\mathrm{ik}({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+\mathrm{\&alpha;}{X}_3-\mathrm{ct})}$

In the formula, U _i=U α _iU _iFor to α _iThe polarize vector of direction, α _iBe the direction cosine of particle displacement, k is along X ₁x ₁The wave number of direction, c is along X ₁The phase velocity of direction, α is along X ₃Direction and X ₁The ratio of the wave number of direction.

According to Christoffel (Chris is how luxuriant and rich with fragrance) formula, utilize anti-pushing manipulation can obtain following formula:

$\left[\begin{array}{ccc}{\mathrm{\&lambda;}}_{11}-{\mathrm{\&rho;<figure-callout\; id="2"\; label="c"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">c</figure-callout>}}^2& {\mathrm{\&lambda;}}_{12}& {\mathrm{\&lambda;}}_{13}\\ {\mathrm{\&lambda;}}_{12}& {\mathrm{\&lambda;}}_{22}-{\mathrm{\&rho;<figure-callout\; id="2"\; label="c"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">c</figure-callout>}}^2& {\mathrm{\&lambda;}}_{23}\\ {\mathrm{\&lambda;}}_{13}& {\mathrm{\&lambda;}}_{23}& {\mathrm{\&lambda;}}_{33}-{\mathrm{\&rho;c}}^2\end{array}\right]\left\{\begin{array}{c}{U}_1\\ U_2\\ {\mathrm{<figure-callout\; id="3"\; label="U"\; filenames="HDA0000022820820000011.png,HDA0000022820820000041.png"\; state="\{\{state\}\}">U</figure-callout>}}_3\end{array}\right\}=\left\{\begin{array}{c}0\\ 0\\ 0\end{array}\right\}$

In the formula: λ _Il=C _Ijkln _jn _k, n _j, n _kDirection cosine for wavefront.U _iRepresentative is to the polarization vector of all directions, and c is a phase velocity.

Find the solution following formula and can get the formal solution that the SH ripple is propagated in the anisotropic solid Elastic medium:

$u_2=\underset{k=1}{\overset{2}{\mathrm{\&Sigma;}}}{B}_k{e}^{\mathrm{ik}({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+{\mathrm{\&alpha;}}_k{X}_3-\mathrm{ct})}$

${\mathrm{\&sigma;}}_{32}=\underset{k=1}{\overset{2}{\mathrm{\&Sigma;}}}{B}_k{\mathrm{\&alpha;}}_k\mathrm{\&mu;}\left(\mathrm{ik}\right)e^{\mathrm{ik}({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+{\mathrm{\&alpha;}}_k{X}_3-\mathrm{ct})}$

The formal solution that the Lamb ripple is propagated in the anisotropic solid Elastic medium is:

$u_1=\underset{k=1}{\overset{4}{\mathrm{\&Sigma;}}}{B}_k{e}^{\mathrm{ik}({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+{\mathrm{\&alpha;}}_k{X}_3-\mathrm{ct})}$

${\mathrm{\&sigma;}}_{31}=\underset{k=1}{\overset{4}{\mathrm{\&Sigma;}}}{B}_k[{\mathrm{\&alpha;}}_k+U_{3k}]\mathrm{\&mu;}\left(\mathrm{ik}\right)e^{\mathrm{ik}({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+{\mathrm{\&alpha;}}_k{X}_3-\mathrm{ct})}$

Wherein, B _kIt is the Weighting factor of subwave.U _3kBe that ripple is along X ₃Direction and X ₁The polarization vector ratio of direction.When ripple was propagated in sandwich plate, the energy stream (being poynting's vector) in the structure was:

$p_{x1}=-\frac{1}{2}{\left(\frac{{\&PartialD;u}_2}{\&PartialD;t}\right)}^{*}\mathrm{\&mu;}\left(\frac{{\&PartialD;u}_2}{{\&PartialD;x}_1}\right)=\frac{1}{2}\mathrm{kw\&mu;}{\left|\right|\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}{v}_j{e}^{\mathrm{ik}{\mathrm{\&alpha;}}_j{x}_3}\left|\right|}^2$

$p_{x3}=-\frac{1}{2}{\left(\frac{{\&PartialD;u}_2}{\&PartialD;t}\right)}^{*}\mathrm{\&mu;}\left(\frac{{\&PartialD;u}_2}{{\&PartialD;x}_2}\right)=\frac{1}{2}\mathrm{kw\&mu;}\left[\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}{\left(v_j{e}^{\mathrm{ik}{\mathrm{\&alpha;}}_j{x}_3}\right)}^{*}\right]\left[\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}\left(v_j{e}^{\mathrm{ik}{\mathrm{\&alpha;}}_j{x}_3}\right){\mathrm{\&alpha;}}_j\right]$

$\mathrm{power}=\underset{\mathrm{Thickness}}{\&Integral;p}\&CenterDot;\hat{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="HDA0000022820820000011.png,HDA0000022820820000021.png"\; state="\{\{state\}\}">x</figure-callout>}}_1}{\mathrm{<figure-callout\; id="3"\; label="dx"\; filenames="HDA0000022820820000011.png,HDA0000022820820000041.png"\; state="\{\{state\}\}">dx</figure-callout>}}_3=\underset{\mathrm{<figure-callout\; id="3"\; label="Thickness\; dx"\; filenames="HDA0000022820820000011.png,HDA0000022820820000041.png"\; state="\{\{state\}\}">Thickness</figure-callout>}}{\&Integral;p_{x1}}{\mathrm{dx}}_{}{}_3$

Wherein, u is a displacement field, and t is the time, and μ is a shear modulus, and k is a wave number, and w is used wave frequency, v _jBe subwave coefficient undetermined, α _jEigenvalue from the acquisition of Christoffel equation.P _XiBe x in the structure _iThe energy stream of direction is poynting's vector, and for periodic electromagnetic field, the time average of poynting's vector is a vector, can think the direction of this vector be exactly the direction of propagation, the size of energy be exactly the average power specific discharge.

Find the solution the stress concentration factor ISCC that Lamb ripple and SH ripple are produced _LAnd ISCC _SFor:

${\mathrm{ISCC}}_L=\frac{{\mathrm{\&sigma;}}_{31}{|}_{\mathrm{Layer}/\mathrm{Interface}}}{\sqrt{\mathrm{power}}}$

${\mathrm{ISCC}}_S=\frac{{\mathrm{\&sigma;}}_{32}{|}_{\mathrm{Layer}/\mathrm{Interface}}}{\sqrt{\mathrm{power}}}$

In the formula: power is the power of required input transducer,

Be stress field.

Therefore, Lamb ripple and SH ripple can produce shearing stress between ice sheet 4 and wind machine oar leaf 3, if shearing stress greater than the adhesion stress of ice sheet 4, then ice sheet 4 can directly be removed; If shearing stress is less than the adhesion stress of ice sheet 4, Lamb ripple and SH ripple can produce fricting movement and give birth to heat between ice sheet 4 and wind machine oar leaf 3, thereby make and form the very thin water layer of one deck between ice sheet 4 and the wind machine oar leaf 3, ultrasonic cavitation can produce the high voltage transient of violent change in the part ice is removed, thereby can be implemented in the anti-icing and deicing of line.Studies show that, frequency is in the ultrasonic SH ripple of 18kHz-2MHz and the interfacial shearing stress that Lamb ripple maximum can produce 2MPa, and ice sheet 4 adhere to shear strength only for 0.4MPa, hyperacoustic phase velocity is when 1km/s increases to 7km/s, the interfacial stress concentration factor that the SH ripple is produced reaches as high as

The interfacial stress concentration factor ISCC that the Lamb ripple is produced is 1.4 times of SH ripple, so the SH ripple in the ultrasound and Lamb wave energy enough play anti-icing and effect deicing.

As shown in Figure 4, the size of piezoelectric transducer 21 is 30cm * 2.5cm * 0.5cm in the present embodiment, the matrix of piezoelectric transducer 21 is a piezoelectric ceramic 211, and the both sides of piezoelectric ceramic 211 are installed with metal film 212 respectively, and metal film 212 links to each other with the output terminal of ultrasonic generator 1 respectively.

As shown in Figure 5 and Figure 6, the length a of deicing unit 2 be wind machine oar leaf 3 entire length A 2/3, and wind machine oar leaf 3 side by root is located in deicing unit 2; Deicing unit 2 is located near wind machine oar leaf 3 central axis, and the width b of deicing unit 2 is 1/3 of wind machine oar leaf 3 integral width B.

As shown in Figure 7, ultrasonic generator 1 is provided with power adjustments button 11, frequency adjustment button 12 and led display unit 13.Power adjustments button 11 is used to regulate the size to piezoelectric transducer 21 output energy power, and the energy of output is big more, and Lamb ripple and SH ripple can produce shearing stress between ice sheet 4 and wind machine oar leaf 3 big more, and the effect of anti-icing and deicing is good more.Be respectively equipped with corresponding best anti-icing frequency shelves and best frequency ice shelves, the high-frequency ac electrical signal of corresponding respectively best anti-icing frequency of output and best deicing frequency of removing on the frequency adjustment button 12.Led display unit 13 is used to show ultrasonic generator 1 current working state, for example exports the frequency of high-frequency ac electrical signal and power etc.

When ultrasonic generator 1 was exported the high-frequency ac electrical signal of best anti-icing frequency or best deicing frequency, the Energy Efficiency Ratio of the anti-icing or deicing of deicing unit 2 was the highest, and best anti-icing frequency is relevant with the material of wind machine oar leaf 3 with best deicing frequency.For isotrocpic material,, when amplitude is 3.1 μ m, can eliminate 60% adhesion stress of ice sheet 4 as the frequency 37kHz of high-frequency ac electrical signal; When the frequency of high-frequency ac electrical signal increases to 84kHz, can eliminate 70% adhesion stress of ice sheet 4; When the frequency of high-frequency ac electrical signal reached 130khz, ice sheet 4 can be in the moment fragmentation.For anisotropic material, the frequency of high-frequency ac electrical signal is between 300khz～450khz the time, and ice sheet 4 can be in the moment fragmentation.For isotrocpic material, hyperacoustic best deicing frequency is 130kHz, and for anisotropic material, best deicing frequency is between 300khz～450khz.The glass fiber compound material of preparation wind machine oar leaf 3 usefulness belongs to anisotropic composite material in the present embodiment, so the best deicing frequency of high-frequency ac electrical signal is that 300khz～450khz, best anti-icing frequency are then higher, and one reaches more than the 450khz.In the present embodiment, when frequency adjustment button 12 was adjusted to best deicing frequency shelves, ultrasonic generator 1 sent the high-frequency ac electrical signal of 300khz; When frequency adjustment button 12 was adjusted to best anti-icing frequency shelves, ultrasonic generator 1 sent the high-frequency ac electrical signal of 500khz.

With 1 meter as a unit length, temperature is to carry out deicing in the subzero 15 ℃ environment to be example in 1 hour: when the thickness of ice sheet 4 was 3mm～4mm, traditional hot deicing technology energy consumption was about about 2.7kw, and energy consumption of the present invention is about 0.75kw.Along with the increase of ice sheet 4 thickness, energy consumption of the present invention reduces gradually; And anti-icing energy consumption can be than the deicing energy consumption under the respective environment still less.Show that after deliberation ice-removing and ice-preventing energy consumption of the present invention on average is about 40% of traditional hot deicing technology, if the frequency of high-frequency ac electrical signal is higher than 500khz, ice-removing and ice-preventing energy consumption of the present invention on average is about about 28% of traditional hot deicing technology.

The above only is a preferred implementation of the present invention, and protection scope of the present invention also not only is confined to the foregoing description, and all technological schemes that belongs under the thinking of the present invention all belong to protection scope of the present invention.Should be understood that; for those skilled in the art; in the some improvements and modifications that do not break away under the principle of the invention prerequisite; for example change the combining form that adopts other between a plurality of piezoelectric transducers 21 of deicing unit 2; the installation width of adjustment deicing unit 2 or length or the like, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (9)

1. online anti-icing and de-icing device for wind turbine, it is characterized in that: it comprises ultrasonic generator (1) and is used for producing on the surface of wind machine oar leaf (3) the deicing unit (2) of ultrasonic Lamb wave and horizontal shear wave, described deicing unit (2) is made up of a plurality of piezoelectric transducers (21) of being located at wind machine oar leaf (3) internal surface, and the input end of described piezoelectric transducer (21) links to each other with the output terminal of described ultrasonic generator (1) respectively.

2. online anti-icing and de-icing device for wind turbine according to claim 1 is characterized in that: described piezoelectric transducer (21) is a strip, and each piezoelectric transducer (21) is the array configuration distribution along same direction in the described deicing unit (2).

3. online anti-icing and de-icing device for wind turbine according to claim 2 is characterized in that: the distance L in the described deicing unit (2) between two adjacent piezoelectric transducers (21) of parallel distribution is:

L＝(n+1/2)λ _R，

Wherein n is a natural number, λ _RWavelength when ultrasonic Lamb wave that produces for described deicing unit (2) or horizontal shear wave are propagated on the surface of wind machine oar leaf (3).

4. online anti-icing and de-icing device for wind turbine according to claim 3 is characterized in that: described piezoelectric transducer (21) is along the length direction setting of described wind machine oar leaf (3).

5. according to claim 1 or 2 or 3 or 4 described online anti-icing and de-icing device for wind turbine, it is characterized in that: the matrix of described piezoelectric transducer (21) is piezoelectric ceramic (211), the both sides of described piezoelectric ceramic (211) are installed with metal film (212) respectively, and described metal film (212) links to each other with the output terminal of described ultrasonic generator (1) respectively.

6. according to claim 1 or 2 or 3 or 4 described online anti-icing and de-icing device for wind turbine, it is characterized in that: the length a of described deicing unit (2) be wind machine oar leaf (3) entire length A 2/3, and deicing unit (2) are located at described wind machine oar leaf (3) by a side of root.

7. online anti-icing and de-icing device for wind turbine according to claim 5, it is characterized in that: the length a of described deicing unit (2) be wind machine oar leaf (3) entire length A 2/3, and deicing unit (2) are located at described wind machine oar leaf (3) by a side of root.

8. according to claim 1 or 2 or 3 or 4 described online anti-icing and de-icing device for wind turbine, it is characterized in that: the width b of described deicing unit (2) is 1/3 of wind machine oar leaf (3) integral width B.

9. online anti-icing and de-icing device for wind turbine according to claim 7 is characterized in that: the width b of described deicing unit (2) is 1/3 of wind machine oar leaf (3) integral width B.

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