Device, method, system and equipment for determining ice shedding warning range of wind farms in ice areas

Abstract

The present invention discloses a device, method, system and equipment for distinguishing ice shedding warning range of wind farms in ice areas, which belongs to the field of wind turbine safety warning, utilizes wind measurement data in the wind farm, fully taps the potential value of the data source of the power farm, and makes the data source more reliable and timely as a whole, and the corresponding calculated warning range is also more reliable, reducing the possibility of false alarms. It not only solves the problem of timely notifying operation and maintenance personnel when there is an ice shedding risk, but also uses the existing data of the wind tower to provide a method for judging different ice shedding risks and corresponding warning ranges under different wind turbine operating conditions.

Description

Technical Field

[0001] The present invention belongs to the field of wind turbine safety warning, and relates to an ice shedding warning range determination device, method, system and equipment for an ice zone wind farm. Background Art

[0002] In recent years, with the rapid development of the wind power industry, more and more wind farms are designed in areas with complex terrain or complex climate. There are abundant wind resources in cold climate areas. However, in these cold climate areas, wind turbines often have serious blade freezing problems. Although relevant wind turbine manufacturers have proposed various methods to prevent blade freezing, they still cannot completely solve this problem.

[0003] In addition to affecting the efficiency of the generator set and reducing the life of the unit, the ice formation of wind turbine blades also poses a serious risk of ice shedding during the operation of the unit. The hub height of existing wind turbines is getting higher and higher, and the blade length is getting longer and longer. On this basis, the risk of ice shedding and damage caused by ice formation on the blades is also increasing, especially for wind farms near wind turbines where human activities are more frequent.

[0004] Although there are devices and methods for preventing ice shedding risks in the prior art, there is little research on ice shedding warning. Therefore, it is urgent to develop a device that can provide ice shedding warning. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art that it is impossible to make accurate warnings for ice shedding in wind farms to avoid accidents, and to provide an ice shedding warning range determination device, method, system and equipment for wind farms in ice areas.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An ice-shedding warning range identification device for an ice-region wind farm comprises a wind measuring tower, a controller, a unit operation status monitoring unit, an alarm unit and a wind turbine unit;

[0008] The wind tower comprises a tower body, on which a data recorder and a wind measuring component are installed, and the wind measuring component comprises an anemometer and a wind vane; the data recorder is electrically connected to the anemometer and the wind vane respectively;

[0009] There are several wind measurement components, which are evenly arranged at different height levels of the wind tower body. The height levels include the fan hub height, the highest point of the blade wind sweep range, and the lowest point of the blade wind sweep range.

[0010] The unit operation status monitoring unit includes a blade status monitoring sensor and an icing sensor installed on the fan unit;

[0011] The alarm unit is installed on the fan unit;

[0012] The data recorder, the blade status monitoring sensor, the icing sensor and the alarm unit are respectively connected to the controller through signal transmission lines.

[0013] Preferably, the alarm unit includes an alarm and a searchlight, and the alarm and the searchlight are respectively connected to the controller through a signal transmission line.

[0014] Preferably, the unit operation status monitoring unit further comprises a tower load monitoring sensor installed on the wind turbine unit;

[0015] The tower body of the wind turbine unit is formed by connecting a plurality of tower sections, and a plurality of tower load monitoring sensors are provided and respectively installed at the connection positions of the plurality of tower sections.

[0016] Preferably, the ice-shedding warning range determination device for an ice-area wind farm further comprises a meteorological sensor installed on the wind turbine unit;

[0017] The wind turbine unit is also equipped with a hygrometer and a pressure gauge on the wind turbine unit nacelle shell;

[0018] A thermometer is also installed on the fan unit, and the thermometer is connected to the controller through a signal transmission line;

[0019] There are several thermometers;

[0020] The anemometer and wind vane have the same number of settings.

[0021] A method for determining an ice shedding warning range of an ice-region wind farm comprises the following steps:

[0022] Obtain wind turbine specification data, wind turbine operation data and environmental parameters in wind farms;

[0023] Determine the freezing risk of wind turbine blades based on wind turbine operating data and environmental parameters;

[0024] When there is no risk of freezing, the fan unit operates normally;

[0025] When there is a risk of freezing, the ice-shedding parabola of the fan blades is calculated based on the fan operation data, the ice-shedding warning range is obtained, and an alarm is issued based on the ice-shedding warning range.

[0026] Preferably, the fan specification data includes the fan hub height and blade length;

[0027] Fan operation data includes fan blade speed and angle;

[0028] Environmental parameters include humidity, temperature, air pressure and wind speed near the fan.

[0029] Preferably, the freezing risk determination process of the wind turbine blades is specifically as follows:

[0030] Based on environmental parameters and fan operation data, the temperature distribution in the height direction of the fan location, the humidity and air pressure at the hub are obtained. Based on the freezing point of water under the temperature, humidity and air pressure at different height layers of the tower, it is judged whether the fan has a freezing risk.

[0031] Preferably, the calculation process of the ice shedding warning range is specifically as follows:

[0032] Based on the blade speed of the wind turbine, the ice-shedding parabola with the tip wind speed on the blade as the initial velocity is calculated, and the corresponding ice-shedding warning range is calculated;

[0033] The ice shedding warning range is specifically a circular area with the wind turbine location as the center, and the radius of the circular area is the straight-line distance between the farthest landing point of the parabola and the wind turbine location.

[0034] An ice-shedding warning range identification system for wind farms in ice areas, comprising:

[0035] A data acquisition module is used to obtain the specification data, operating parameters and environmental parameters of wind turbines in the wind farm;

[0036] The risk judgment module interacts with the data acquisition module and is used to judge whether the blades of the wind turbine set have the risk of ice shedding and freezing according to the wind turbine specification data, wind turbine operating parameters and environmental parameters;

[0037] The data processing module is used to obtain the ice shedding warning range according to the fan specification data, fan operation parameters and environmental parameters.

[0038] A terminal device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for determining the ice shedding warning range of an ice zone wind farm are implemented.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention discloses a device for distinguishing ice shedding warning range of a wind farm in an ice area, comprising a wind measuring tower, a controller, a unit operation status monitoring unit, an alarm unit and a wind turbine unit. A data recorder and a wind measuring component are installed on the wind measuring tower body. A plurality of wind measuring components are provided, which are evenly arranged at different height layers of the wind measuring tower body, so that the wind speed and wind direction at different height layers of the wind measuring tower can be detected in all directions. The unit operation status monitoring unit comprises a blade status monitoring sensor and an icing sensor installed on the wind turbine unit, so that information on the blades of the wind turbine unit can be obtained, the wind measurement data in the wind farm is utilized, and the potential value of the data source of the wind farm is fully excavated. On the whole, the data source is more reliable and timely, the corresponding calculated warning range is also more reliable, and the possibility of false alarm is reduced.

[0041] Furthermore, an alarm unit is installed on the fan unit and consists of an alarm and a searchlight. The alarm sounds an alarm based on the warning signal command given by the controller, and at the same time broadcasts the ice shedding warning range calculated by the controller. At the same time, the searchlight performs cyclic searchlighting within the warning range based on the ice shedding warning range calculated by the controller.

[0042] Furthermore, a tower load monitoring sensor is installed on the wind turbine unit; there are several tower load monitoring sensors, which are installed at the connection points of several sections of the tower. Thus, the load information on different towers of the wind turbine unit can be obtained in real time, and the load on which tower will have a problem can be accurately located.

[0043] Furthermore, the wind turbine unit is also provided with a meteorological sensor, a thermometer, a hygrometer and a pressure gauge, so that the environmental information of the wind turbine unit can be monitored in real time, and a prejudgment can be made in time, with reference to more environmental information, so that the calculation of the warning range can be more accurate, and the accuracy of the device is improved. The device of the present invention can effectively determine the ice shedding warning range of the wind farm according to relevant parameters, and send a warning to the personnel within the warning range through the alarm unit, reminding the relevant personnel to leave in time, reducing the risk of casualties caused by ice shedding, and reducing the downtime loss caused by the risk of ice shedding.

[0044] The present invention also discloses a method for determining the ice shedding warning range of an ice zone wind farm, firstly obtaining the fan specification data, fan operation data and environmental parameters in the wind farm; determining the freezing risk of the wind turbine blades based on the fan operation data and environmental parameters; when there is no freezing risk, the wind turbine unit operates normally; when there is a freezing risk, the ice shedding parabola of the fan blades is calculated based on the fan operation data, and the ice shedding warning range is obtained, and an alarm is issued based on the ice shedding warning range. The method of the present invention not only solves the problem of notifying the operation and maintenance personnel in a timely manner when there is an ice shedding risk, but also uses the existing data of the wind tower to provide a method for determining different ice shedding risks and corresponding warning ranges under different wind turbine operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the ice-shedding warning range determination device for an ice-region wind farm according to the present invention;

[0046] Figure 2 It is a schematic diagram of the whole-field identification effect of the ice-shedding early warning range identification device for wind farms in ice areas according to the present invention;

[0047] Among them: 1- wind tower; 11- wind tower body; 12- data recorder; 13- anemometer; 14- wind vane; 2- controller; 3- unit operation status monitoring unit; 31- blade status monitoring sensor; 32- icing sensor; 33- tower load monitoring sensor; 34- hygrometer; 35- pressure gauge; 36- thermometer; 4- alarm unit; 41- alarm; 42- searchlight; 5- fan unit; 6- meteorological sensor. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatus.

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0051] Example 1

[0052] A device for determining the ice shedding warning range of a wind farm in an ice area, such as Figure 1 As shown, it includes a wind tower 1, a controller 2, a unit operation status monitoring unit 3, an alarm unit 4 and a wind turbine unit 5; the wind tower 1 includes a wind tower body 11, on which a data recorder 12, an anemometer 13 and a wind vane 14 are installed, and the data recorder 12 is electrically connected to the anemometer 13 and the wind vane 14 respectively; a plurality of anemometers 13 and a wind vane 14 are provided, and one anemometer 13 and one wind vane 14 form a group, and the wind vane 14 is installed on the side of the anemometer 13, and a plurality of wind measuring components (including an anemometer 13 and a wind vane 14) are provided, which are respectively arranged at different height layers of the wind tower body 11, and the height layers include the fan hub height, the highest point of the blade sweeping range and the lowest point of the blade sweeping range; the unit operation status monitoring unit 3 includes a blade status monitoring sensor 31 and an icing sensor 32 installed on the wind turbine unit 5;

[0053] The alarm unit 4 is installed on the tower body of the fan unit 5;

[0054] The data recorder 12 , the blade state monitoring sensor 31 , the icing sensor 32 and the alarm unit 4 are electrically connected to the controller 2 , respectively.

[0055] Example 2

[0056] Except for the following contents, the rest are the same as Example 1.

[0057] The wind turbine unit 5 is composed of a wind wheel, a wind-facing device, a speed regulating mechanism, a transmission device, a working device, an energy storage device, a tower and auxiliary components; the wind wheel, the wind-facing device, the speed regulating mechanism, the transmission device, the working device and the energy storage device are connected in sequence and supported by the tower.

[0058] The control system is arranged in the wind farm centralized control center, and is composed of a controller 2, a memory, a data processor, an ice shedding risk identification module, an ice shedding warning range calculation model, and a display interface;

[0059] The unit operation status monitoring unit 3 includes a blade status monitoring sensor 31, an icing sensor 32 and a tower load monitoring sensor 33 installed on the wind turbine unit 5. The tower body of the wind turbine unit 5 is formed by connecting several tower sections. There are several tower load monitoring sensors 33, which are respectively installed at the connection points of several tower sections.

[0060] Environmental parameter acquisition includes a meteorological sensor 6 installed on the wind turbine unit 5, and also includes a hygrometer 34, a thermometer 36 and a pressure gauge 35 installed on the nacelle shell of the wind turbine unit 5; the meteorological sensor 6, the thermometer 36, the hygrometer 34 and the pressure gauge 35 are respectively connected to the controller 2 through a signal transmission line.

[0061] The alarm unit 4 is installed on the fan unit and consists of an alarm 41 and a searchlight 42. The alarm 41 alarms according to the warning signal command given by the controller 2, and at the same time broadcasts the ice-shedding warning range calculated by the controller 2. At the same time, the searchlight 42 performs cyclic searchlighting within the warning range based on the ice-shedding warning range calculated by the controller 2.

[0062] Example 3

[0063] A method for determining an ice shedding warning range of an ice-region wind farm comprises the following steps:

[0064] Obtain wind turbine specification data, wind turbine operation data and environmental parameters in wind farms;

[0065] Determine the freezing risk of wind turbine blades based on wind turbine operating data and environmental parameters;

[0066] When it is determined based on wind turbine operating data and environmental parameters that there is no risk of freezing, the wind turbine operates normally;

[0067] When there is a risk of freezing, the ice-shedding parabola of the wind turbine blades is calculated based on the wind turbine operation data to obtain the ice-shedding warning range;

[0068] Alarm based on ice shedding warning range.

[0069] Example 4

[0070] The method for determining the ice shedding warning range of an ice zone wind farm disclosed in the present invention comprises the following steps:

[0071] Step 1) The memory in the control system first obtains relevant wind turbine specification data, including hub height and blade length;

[0072] Step 2) Obtain wind turbine operating parameters and environmental parameters through wind towers and meteorological sensors;

[0073] Step 3) sending the parameters obtained in step 2) to a memory in the control system via a communication device;

[0074] Step 4) The ice shedding risk identification module in the control system reads the parameters in the memory to determine whether the blades have a risk of freezing. For example, in this case, the temperature read by the wind tower and the meteorological sensor is less than -10°C, and the humidity is 87%, and the central computing device determines that there is a risk of freezing;

[0075] Step 5) If the judgment result in step 4) is yes, all parameters are automatically sent to the ice shedding warning range calculation model in the control system, and the real-time ice shedding warning range radius is calculated and displayed on the display interface in the control system. For example, in this case, the fan blade speed is 0.5RPM / min, the corresponding blade tip speed is 5m / s, and the corresponding landing point calculated according to the parabola is 62m based on the fan point radius;

[0076] Step 6) transmitting the real-time ice shedding warning range calculated in step 5) to the alarm unit via a communication device;

[0077] Step 7) The alarm in the alarm unit broadcasts the ice shedding risk range in real time by voice;

[0078] Step 8) The searchlight in the alarm unit performs circular searchlighting within the warning range radius obtained in step 6).

[0079] refer to Figure 2 When there are multiple wind turbine units 5, the data monitored by each wind turbine unit 5 and the wind tower 1 are simultaneously transmitted to the controller 2 through the communication transmission signal line. The controller 2 processes the data, superimposes the data to form the judgment result of the ice shedding warning range of the entire wind farm, and transmits the calculation result to the alarm unit 4 for alarm.

[0080] It should be noted that the present invention can also add a laser scanning unit in the alarm unit to warn the relevant people more intuitively, remind the relevant personnel to leave in time, reduce the risk of casualties caused by ice shedding, and reduce downtime losses caused by the risk of ice shedding.

[0081] Example 5

[0082] An ice-shedding warning range identification system for wind farms in ice areas, comprising:

[0083] A data acquisition module is used to obtain the specification data, operating parameters and environmental parameters of wind turbines in the wind farm;

[0084] The risk judgment module interacts with the data acquisition module and is used to judge whether the blades of the wind turbine set have the risk of ice shedding and freezing according to the wind turbine specification data, wind turbine operating parameters and environmental parameters;

[0085] The data processing module is used to obtain the ice shedding warning range according to the fan specification data, fan operation parameters and environmental parameters.

[0086] Example 6

[0087] In an exemplary embodiment, a computer device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method of the present invention when executing the computer program. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.

[0088] In summary, the present invention not only solves the problem of timely notifying operation and maintenance personnel when there is an ice shedding risk, but also uses the existing data of the wind tower to provide a method for judging different ice shedding risks and corresponding warning ranges under different wind turbine operating conditions.

[0089] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A method for determining the ice shedding warning range of an ice-covered wind farm based on an ice-covered wind farm ice shedding warning range determination device, characterized in that: The device comprises: a wind measuring tower (1), a controller (2), a unit operation status monitoring unit (3), an alarm unit (4) and a wind turbine unit (5); The wind measurement tower (1) comprises a wind measurement tower body (11), on which a data recorder (12) and a wind measurement component are installed. A plurality of wind measurement components are provided and are evenly arranged at different height levels of the wind measurement tower body (11), the height levels including the height of the wind turbine hub, the highest point of the blade wind sweeping range, and the lowest point of the blade wind sweeping range. The wind measurement component comprises an anemometer (13) and a wind vane (14) installed on the side of the anemometer (13), and the data recorder (12) is electrically connected to the anemometer (13) and the wind vane (14), respectively. The unit operation status monitoring unit (3) comprises a blade status monitoring sensor (31) and an icing sensor (32) installed on the fan unit (5); The alarm unit (4) is installed on the fan unit (5); The data recorder (12), the blade status monitoring sensor (31), the icing sensor (32) and the alarm unit (4) are respectively connected to the controller (2) via signal transmission lines; The alarm unit (4) comprises an alarm (41) and a searchlight (42), and the alarm (41) and the searchlight (42) are respectively connected to the controller (2) via a signal transmission line; The ice-shedding warning range determination device for an ice-area wind farm further comprises a hygrometer (34) and a pressure gauge (35) of a wind turbine nacelle casing installed on the wind turbine unit (5); A thermometer (36) is also installed on the fan unit (5); The thermometer (36), the hygrometer (34) and the pressure gauge (35) are respectively connected to the controller (2) via signal transmission lines; A plurality of thermometers (36), hygrometers (34) and pressure gauges (35) are provided respectively; The anemometer (13) and the wind vane (14) are provided in the same number; The method comprises the following steps: Obtain wind turbine specification data, wind turbine operation data and environmental parameters in wind farms; Determine the freezing risk of wind turbine blades based on wind turbine operating data and environmental parameters; When there is no risk of freezing, the fan unit operates normally; When there is a risk of freezing, the ice-shedding parabola of the fan blades is calculated based on the fan operation data, the ice-shedding warning range is obtained, and an alarm is issued based on the ice-shedding warning range; The fan specification data includes the fan hub height and blade length; Fan operation data includes fan blade speed and angle; Environmental parameters include humidity, temperature, air pressure and wind speed near the fan; The freezing risk determination process of the wind turbine blades is specifically as follows: Based on environmental parameters and wind turbine operation data, the temperature distribution in the height direction of the wind turbine location, the humidity and air pressure at the hub are obtained. Based on the freezing point of water under the temperature, humidity and air pressure at different height layers of the tower body, it is determined whether the wind turbine has a freezing risk. The calculation process of the ice shedding warning range is specifically as follows: Based on the blade speed of the wind turbine, the ice-shedding parabola with the tip wind speed on the blade as the initial velocity is calculated, and the corresponding ice-shedding warning range is calculated; The ice shedding warning range is specifically a circular area with the wind turbine position as the center, and the radius of the circular area is the straight-line distance between the farthest landing point of the parabola and the wind turbine position.

2. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for determining the ice shedding warning range of an ice-region wind farm based on the device for determining the ice shedding warning range of an ice-region wind farm as claimed in claim 1 are implemented.

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