Heating deicing system for blade and control method thereof, blade and wind turbine

1. A heating deicing system for a blade, comprising:

an isolating device arranged in a blade cavity and dividing a part of the blade cavity close to a leading edge of the blade into a plurality of sub-cavities sequentially distributed along a length direction of the blade;

a heating device set arranged in the plurality of sub-cavities; and

a controller configured to separately control opening and closing of the heating device set in the plurality of sub-cavities to heat the plurality of sub-cavities, respectively, in response to a blade deicing instruction,

wherein the heating device set comprises at least a first heating device and a second heating device for each sub-cavity, and the controller is further configured to separately control opening and closing of the first and second heating devices in the sub-cavity.

2. The heating deicing system according to claim 1 , further comprising a plurality of temperature sensors respectively arranged in the plurality of sub-cavities, wherein the controller is further configured to separately control opening and closing of the first and second heating devices in the sub-cavity according to a temperature sensed by a temperature sensor arranged in the sub-cavity.

3. The heating deicing system according to claim 2 , wherein a heating power of the first heating device is smaller than a heating power of the second heating device; and

the controller is further configured to control the first heating device in the sub-cavity to stay open and control opening and closing of the second heating device in the sub-cavity according to the temperature of each of the sub-cavity.

4. The heating deicing system according to claim 1 , wherein;

the heating device set comprises a first heater, a second heater, a first heating pipe, and a second heating pipe;

the first and second heaters are arranged in a part of the blade cavity close to a blade root;

the first heating pipe has one end in communication with the first heater and passes through the plurality of sub-cavities;

the second heating pipe has one end in communication with the second heater and passes through the plurality of sub-cavities;

for each sub-cavity, the first heating device comprises a part of the first heating pipe located in the sub-cavity, and the second heating device comprises a part of the second heating pipe located in the sub-cavity; and

the controller is further configured to control opening and closing of the first and second heaters and separately control opening and closing of the part of the first heating pipe and the part of the second heating pipe located in the sub-cavity in response to the blade deicing instruction.

5. The heating deicing system according to claim 4 , wherein:

a first air outlet branch pipe is arranged on the part of the first heating pipe located in the sub-cavity, and a diameter of the first air outlet branch pipe is smaller than a diameter of the first heating pipe; and

a second air outlet branch pipe is arranged on the part of the second heating pipe located in the sub-cavity, and a diameter of the second air outlet branch pipe is smaller than a diameter of the second heating pipe.

6. The heating deicing system according to claim 5 , wherein each of the first and second air outlet branch pipes extends in a direction parallel to the heating pipe, and each of the first and second air outlet branch pipes is provided with a plurality of air outlets.

7. The heating deicing system according to claim 6 , wherein openings of the plurality of air outlets face toward the leading edge of the blade.

8. The heating deicing system according to claim 1 , wherein the isolating device comprises:

a first baffle arranged along an extending direction of the blade and dividing the blade cavity into a first air recirculation zone and a first blade leading edge zone; and

a plurality of second baffles arranged along a direction perpendicular to the extending direction of the blade and dividing the first blade leading edge zone into the plurality of sub-cavities arranged along the length direction of the blade.

9. The heating deicing system according to claim 1 , wherein the isolating device comprises:

a third baffle and a fourth baffle arranged along a direction perpendicular to an extending direction of the blade and dividing the blade cavity into a blade tip cavity, a middle cavity and a blade root cavity from a tip to a root of the blade;

a fifth baffle arranged along the extending direction of the blade and dividing the middle cavity into a second air recirculation zone and a second blade leading edge zone; and

a plurality of sixth baffles arranged along the direction perpendicular to the extending direction of the blade and dividing the second blade leading edge zone into a plurality of leading edge sub-cavities arranged along the length direction of the blade.

10. The heating deicing system according to claim 9 ; wherein

an air recirculation port corresponding to the blade tip cavity is arranged in a part of the third baffle close to the second air recirculation zone;

an air recirculation port corresponding to the blade root cavity is arranged in a part of the fourth baffle close to the second air recirculation zone; and

air recirculation ports respectively corresponding to the leading edge sub-cavities are arranged in parts of the fifth baffle located in the leading edge sub-cavities.

11. A blade, comprising:

a blade cavity;

an isolating device arranged in the blade cavity and dividing a part of the blade cavity close to a leading edge of the blade into a plurality of sub-cavities sequentially distributed along a length direction of the blade; and

a heating device set arranged in the plurality of sub-cavities, comprising at least a first heating device and a second heating device for each sub-cavity,

wherein opening and closing of the heating device set in the plurality of sub-cavities are controlled separately by a controller to heat the plurality of sub-cavities, respectively, in response to a blade deicing instruction, and

wherein the controller is further configured to separately control opening and closing of the first and second heating devices in the sub-cavity.

12. A wind turbine comprising:

a blade, comprising:

a blade cavity;

an isolating device arranged in the blade cavity and dividing a part of the blade cavity close to a leading edge of the blade into a plurality of sub-cavities sequentially distributed along a length direction of the blade; and

a heating device set arranged in the plurality of sub-cavities; and

a master programmable logic controller (PLC) configured to separately control opening and closing of the heating device set in the plurality of sub-cavities to heat the plurality of sub-cavities, respectively, in response to a blade deicing instruction,

wherein the heating device set comprises at least a first heating device and a second heating device for each sub-cavity, and the master PLC is further configured to separately control opening and closing of the first and second heating devices in the sub-cavity.

13. The blade according to claim 11 , further comprising a plurality of temperature sensors respectively arranged in the plurality of sub-cavities, wherein the controller is further configured to separately control opening and closing of the first and second heating devices in the sub-cavity according to a temperature sensed by a temperature sensor arranged in the sub-cavity.

14. The blade according to claim 13 , wherein a heating power of the first heating device is smaller than a heating power of the second heating device; and

the controller is further configured to control the first heating device in the sub-cavity to stay open and control opening and closing of the second heating device in the sub-cavity according to the temperature of the sub-cavity.

15. The blade according to claim 11 , wherein:

the heating device set comprises a first heater, a second heater, a first heating pipe, and a second heating pipe;

the first and second heaters are arranged in a part of the blade cavity close to a blade root;

the first heating pipe has one end in communication with the first heater and passes through the plurality of sub-cavities;

the second heating pipe has one end in communication with the second heater and passes through the plurality of sub-cavities;

for each sub-cavity, the first heating device comprises a part of the first heating pipe located in the sub-cavity, and the second heating device comprises a part of the second heating pipe located in the sub-cavity; and

the controller is further configured to control opening and closing of the first and second heaters and separately control opening and closing of the part of the first heating pipe and the part of the second heating pipe located in the sub-cavity in response to the blade deicing instruction.

16. The blade according to claim 15 , wherein:

a first air outlet branch pipe is arranged on the part of the first heating pipe located in the sub-cavity, and a diameter of the first air outlet branch pipe is smaller than a diameter of the first heating pipe; and

a second air outlet branch pipe is arranged on the part of the second heating pipe located in the sub-cavity, and a diameter of the second air outlet branch pipe is smaller than a diameter of the second heating pipe.

17. The blade according to claim 16 , wherein each of the first and second air outlet branch pipes extends in a direction parallel to the heating pipe, and each of the first and second air outlet branch pipes is provided with a plurality of air outlets.

18. The blade according to claim 17 , wherein openings of the plurality of air outlets face toward the leading edge of the blade.

19. The blade according to claim 11 , wherein the isolating device comprises:

a first baffle arranged along an extending direction of the blade and dividing the blade cavity into a first air recirculation zone and a first blade leading edge zone; and

a plurality of second baffles arranged along a direction perpendicular to the extending direction of the blade and dividing the first blade leading edge zone into the plurality of sub-cavities arranged along the length direction of the blade.

20. The blade according to claim 11 , wherein the isolating device comprises:

a third baffle and a fourth baffle arranged along a direction perpendicular to an extending direction of the blade and dividing the blade cavity into a blade tip cavity, a middle cavity and a blade root cavity from a tip to a root of the blade;

a fifth baffle arranged along the extending direction of the blade and dividing the middle cavity into a second air recirculation zone and a second blade leading edge zone; and

a plurality of sixth baffles arranged along the direction perpendicular to the extending direction of the blade and dividing the second blade leading edge zone into a plurality of leading edge sub-cavities arranged along the length direction of the blade.