Method and device for removing condensation of variable-pitch motor of wind generating set

Abstract

The invention discloses a condensation removal method and device for a variable-pitch motor of a wind generating set, and the method comprises the steps that a variable-pitch driver controls the variable-pitch motor to enter a condensation removal mode in response to a standby state signal of the variable-pitch motor; and the variable-pitch driver responds to one condensation removal event in the first condensation removal event, the second condensation removal event or the third condensation removal event of the variable-pitch motor and controls the variable-pitch motor to perform classified and graded condensation removal. On the basis of existing devices of an existing variable-pitch system, a temperature sensor and a humidity sensor are used for collecting environment temperature and humidity data and motor body temperature data, condensation removal events of the variable-pitch motor are classified and graded, condensation removal of different grades can be effectively dealt with, condensation can be rapidly removed, and meanwhile the condensation removal efficiency is improved. The purpose of saving energy loss can be achieved. Meanwhile, the technical scheme disclosed by the embodiment of the invention has the characteristics of being simple, reliable, simple, convenient and feasible, and can be effectively and quickly implemented and realized on site.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation electrical control, and in particular relates to a method and a device for removing condensation from a variable pitch motor of a wind power generator set. Background Art

[0002] At present, the application environment of wind turbines is generally harsh, mostly in windy areas with thunderstorms, and the ambient temperature and humidity change frequently, especially in spring or autumn and winter. In this environment, when the surface temperature of the device drops below the dew point temperature, condensation will occur. Therefore, condensation will occur on the variable pitch motor used in wind turbines. Once the variable pitch motor fails to work properly or is damaged due to condensation, it will bring safety hazards to the safe and stable operation of the wind turbine. In severe cases, it may lead to serious unit accidents. Summary of the invention

[0003] The purpose of the present invention is to provide a method and device for removing condensation from a variable pitch motor of a wind turbine generator set in view of the defects of the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, one of the present inventions is a method for decondensing a pitch motor of a wind turbine generator set, characterized in that it includes: in response to a standby state signal of the pitch motor, the pitch driver controls the pitch motor to enter a decondensation mode; the pitch driver responds to one of the first decondensation event, the second decondensation event or the third decondensation event of the pitch motor, and controls the pitch motor to perform classified and graded decondensation.

[0005] Furthermore, the first decondensation event is that the ambient temperature is lower than the preset ambient temperature threshold and the ambient humidity data collected by the humidity sensor is greater than the first preset ambient humidity threshold; the second decondensation event is that the difference between the body temperature data of the variable pitch motor collected by the first temperature sensor and the ambient temperature data collected by the second temperature sensor is greater than the first preset temperature difference threshold and the ambient humidity is greater than the second preset ambient humidity threshold; the third decondensation event is that under the condition that the ambient humidity is greater than the second preset ambient humidity threshold, the difference between the body temperature data of the variable pitch motor collected by the first temperature sensor and the ambient temperature data collected by the second temperature sensor is greater than the first preset temperature difference threshold and less than the second preset temperature difference threshold.

[0006] Furthermore, the preset value of the first preset temperature difference threshold is greater than the preset value of the second preset temperature difference threshold; the preset value of the first preset ambient humidity threshold is greater than the second preset ambient humidity threshold.

[0007] Further, when the pitch motor is in the standby state, it is first determined whether the ambient humidity data collected by the humidity sensor is greater than a first preset ambient humidity threshold under the condition that the ambient temperature is lower than the preset ambient temperature threshold; if not, it is determined whether the ambient humidity is greater than the second preset ambient humidity threshold under the condition that the difference between the main body temperature data of the pitch motor collected by the first temperature sensor and the ambient temperature data collected by the second temperature sensor is greater than the first preset temperature difference threshold; if it is still not satisfied, it is determined whether the ambient humidity is greater than the second preset ambient humidity threshold under the condition that the ambient humidity is greater than the second preset ambient humidity threshold.

[0008] Furthermore, the pitch drive closes the pitch motor brake and, at the same time, starts zero-speed excitation of the pitch motor, controlling the excitation current to be input into the pitch motor by the pitch drive at a preset current value that is less than the rated current of the pitch motor.

[0009] Further, the pitch drive responds to the first decondensation event, then the pitch drive closes the pitch motor brake, starts the pitch motor zero-speed excitation, and controls the excitation current to be input into the pitch motor by the pitch drive at a first preset current value less than the rated current of the pitch motor.

[0010] Furthermore, the pitch drive responds to the second decondensation event, and the pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input into the pitch motor by the pitch drive at a second preset current value less than the rated current of the pitch motor.

[0011] Further, the pitch drive responds to the third decondensation event, the pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input into the pitch motor by the pitch drive at a third preset current value that is less than the rated current of the pitch motor.

[0012] A second embodiment of the present invention provides a decondensation device for a pitch motor of a wind turbine generator set, which adopts the decondensation method described in one embodiment of the present invention, and includes: a pitch drive, a pitch motor electrically connected to the pitch drive, a first temperature sensor arranged on the pitch motor and electrically connected to the pitch drive, a second temperature sensor electrically connected to the pitch drive, a humidity sensor electrically connected to the pitch drive, and a power supply electrically connected to the pitch drive; the humidity sensor is used to collect ambient humidity data, the first temperature sensor is used to collect the main body temperature data of the pitch motor, and the second temperature sensor is used to collect ambient temperature data.

[0013] In the technical solution involved in the embodiment disclosed in this application, by using the existing components of the existing variable pitch system and using temperature sensors and humidity sensors to collect environmental temperature and humidity data and motor body temperature data, and then classifying and grading the variable pitch motor decondensation events, it can not only effectively deal with different levels of decondensation and quickly remove condensation, but also achieve the purpose of saving energy loss. At the same time, the technical solution involved in the embodiment disclosed in this application has the characteristics of being simple and reliable, simple and easy to implement, and can be effectively and quickly implemented and realized on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic flow chart of a method for removing condensation from a variable pitch motor of a wind turbine generator set.

[0015] Figure 2 A schematic diagram of a method for removing condensation from a variable pitch motor of a wind turbine generator set according to the present invention

[0016] Figure 3 The present invention is a schematic structural diagram of a condensation removal device for a variable pitch motor of a wind turbine generator set. DETAILED DESCRIPTION

[0017] In order to explain the technical content, control flow, objectives and effects of the present invention in detail, embodiments are given below and described in detail with reference to the accompanying drawings.

[0018] See also Figure 1 , Figure 1 The figure shows a flow chart of a method for removing condensation from a pitch motor of a wind turbine generator set provided by an embodiment of the present application. Figure 1 As shown, the method for removing condensation from the variable pitch motor of the wind turbine generator set comprises:

[0019] Step S1: In response to a standby state signal of the pitch motor, the pitch driver controls the pitch motor to enter a decondensation mode;

[0020] Step S2: the pitch driver 1 responds to one of the first decondensation event, the second decondensation event or the third decondensation event of the pitch motor 2, and controls the pitch motor to perform classified and graded decondensation.

[0021] In a specific feasible embodiment, the first decondensation event is that the ambient temperature is lower than the preset ambient temperature threshold and the ambient humidity data collected by the humidity sensor 6 is greater than the first preset ambient humidity threshold; the second decondensation event is that the difference between the body temperature data of the variable pitch motor 2 collected by the first temperature sensor 3 and the ambient temperature data collected by the second temperature sensor 4 is greater than the first preset temperature difference threshold and the ambient humidity is greater than the second preset ambient humidity threshold; the third decondensation event is that under the condition that the ambient humidity is greater than the second preset ambient humidity threshold, the difference between the body temperature data of the variable pitch motor collected by the first temperature sensor 3 and the ambient temperature data collected by the second temperature sensor 4 is greater than the first preset temperature difference threshold and less than the second preset temperature difference threshold.

[0022] In the above-mentioned feasible embodiments, the preset value of the first preset temperature difference threshold is greater than the preset value of the second preset temperature difference threshold; the preset value of the first preset ambient humidity threshold is greater than the second preset ambient humidity threshold.

[0023] See also Figure 2 , Figure 2 Another flow chart of a method for removing condensation from a pitch motor of a wind turbine generator set provided in an embodiment of the present application is shown, wherein step S2 further includes step S21: when the pitch motor 2 is in a standby state, first determine whether the ambient humidity data collected by the humidity sensor 6 is greater than a first preset ambient humidity threshold under the condition that the ambient temperature is lower than a preset ambient temperature threshold; if not, determine whether the ambient humidity is greater than a second preset ambient humidity threshold under the condition that the difference between the main body temperature data of the pitch motor 2 collected by the first temperature sensor 3 and the ambient temperature data collected by the second temperature sensor 4 is greater than the first preset temperature difference threshold; if still not, determine whether the difference between the main body temperature data of the pitch motor 2 collected by the first temperature sensor 3 and the ambient temperature data collected by the second temperature sensor 4 is greater than the first preset temperature difference threshold and less than the second preset temperature difference threshold under the condition that the ambient humidity is greater than the second preset ambient humidity threshold.

[0024] Step S2 further includes step S22: the pitch drive 1 closes the pitch motor 2 brake, and at the same time, starts the zero-speed excitation of the pitch motor 2, and controls the excitation current to be input from the pitch drive 1 to the pitch motor 2 at a preset current value less than the rated current of the pitch motor. In a specific embodiment, the specific value of the preset current value can be, for example, 60% of the rated current of the pitch motor, or 50% of the rated current of the pitch motor.

[0025] In step S2, the pitch drive 1 responds to the first decondensation event, and the pitch drive 1 closes the pitch motor 2 brake, starts the pitch motor zero-speed excitation, and controls the excitation current to be input from the pitch drive 1 to the pitch motor 2 at a first preset current value that is less than the rated current of the pitch motor.

[0026] In step S2, the pitch drive 1 responds to the second decondensation event, and the pitch drive 1 closes the pitch motor brake, starts the pitch motor zero-speed excitation, and controls the excitation current to be input from the pitch drive 1 to the pitch motor 2 at a second preset current value that is less than the rated current of the pitch motor.

[0027] In step S2, the pitch drive 1 responds to the third decondensation event, and the pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input from the pitch drive 1 to the pitch motor 2 at a third preset current value that is less than the rated current of the pitch motor.

[0028] The first preset current value is greater than the second preset current value, and the second preset current value is greater than the third preset current value.

[0029] If the conditions listed in the first decondensation event, the second decondensation event or the third decondensation event are not met, the pitch drive 1 exits the decondensation mode.

[0030] See also Figure 3 , the following introduces a decondensation device for a variable pitch motor of a wind turbine generator set provided in the second aspect of an embodiment of the present application. Figure 2 The structure diagram of a pitch motor decondensation device for a wind turbine generator set provided in an embodiment of the present application is shown. Figure 2 As shown, the pitch motor decondensation device 100 of the wind turbine generator set includes: a pitch drive 1, a pitch motor 2 electrically connected to the pitch drive, a first temperature sensor 3 arranged on the pitch motor 2 and electrically connected to the pitch drive, a second temperature sensor 4 electrically connected to the pitch drive 1, and a power supply 5 electrically connected to the pitch drive 1. The first temperature sensor 3 is used to collect the body temperature data of the pitch motor 2, and the second temperature sensor is used to collect ambient temperature data.

[0031] Please continue to see Figure 3 The pitch motor decondensation device 100 of the wind turbine generator set of the present application further includes: a humidity sensor 6 electrically connected to the pitch drive 1, for collecting environmental humidity data.

[0032] In the technical solution involved in the embodiment disclosed in this application, by using the existing components of the existing variable pitch system and using temperature sensors and humidity sensors to collect environmental temperature and humidity data and motor body temperature data, and then classifying and grading the variable pitch motor decondensation events, it can not only effectively deal with different levels of decondensation and quickly remove condensation, but also achieve the purpose of saving energy loss. At the same time, the technical solution involved in the embodiment disclosed in this application has the characteristics of being simple and reliable, simple and easy to implement, and can be effectively and quickly implemented and realized on site.

[0033] The technical solutions described above are only preferred embodiments of the present invention. Any equivalent changes or substitutions made on the basis of the present invention are included in the scope of the claims of this patent.

Claims

1. A method for removing condensation from a variable pitch motor of a wind turbine generator set, characterized in that: include: In response to the pitch motor standby state signal, the pitch driver controls the pitch motor to enter a decondensation mode; The pitch driver responds to one of the first decondensation event, the second decondensation event or the third decondensation event of the pitch motor, and controls the pitch motor to perform classified and graded decondensation.

2. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 1, characterized in that: The first decondensation event is that the ambient temperature is lower than the preset ambient temperature threshold and the ambient humidity data collected by the humidity sensor is greater than the first preset ambient humidity threshold; the second decondensation event is that the difference between the body temperature data of the variable pitch motor collected by the first temperature sensor and the ambient temperature data collected by the second temperature sensor is greater than the first preset temperature difference threshold and the ambient humidity is greater than the second preset ambient humidity threshold; the third decondensation event is that under the condition that the ambient humidity is greater than the second preset ambient humidity threshold, the difference between the body temperature data of the variable pitch motor collected by the first temperature sensor and the ambient temperature data collected by the second temperature sensor is greater than the first preset temperature difference threshold and less than the second preset temperature difference threshold.

3. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 2, characterized in that: The preset value of the first preset temperature difference threshold is greater than the preset value of the second preset temperature difference threshold; the preset value of the first preset ambient humidity threshold is greater than the second preset ambient humidity threshold.

4. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 3, characterized in that: When the pitch motor is in standby mode, first determine whether the ambient humidity data collected by the humidity sensor is greater than the first preset ambient humidity threshold under the condition that the ambient temperature is lower than the preset ambient temperature threshold; if not, determine whether the ambient humidity is greater than the second preset ambient humidity threshold under the condition that the difference between the main body temperature data of the pitch motor collected by the first temperature sensor and the ambient temperature data collected by the second temperature sensor is greater than the first preset temperature difference threshold; if still not satisfied, determine whether the ambient humidity is greater than the second preset ambient humidity threshold under the condition that the ambient humidity is greater than the second preset ambient humidity threshold.

5. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 4, characterized in that: The pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input into the pitch motor by the pitch drive at a preset current value less than the rated current of the pitch motor.

6. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 5, characterized in that: The pitch drive responds to the first decondensation event, and the pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input into the pitch motor by the pitch drive at a first preset current value less than the rated current of the pitch motor.

7. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 5, characterized in that: The pitch drive responds to the second decondensation event, and the pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input into the pitch motor by the pitch drive at a second preset current value less than the rated current of the pitch motor.

8. The method for removing condensation from a variable pitch motor of a wind turbine generator set according to claim 5, characterized in that: The pitch drive responds to the third decondensation event, then the pitch drive closes the pitch motor brake, starts the zero-speed excitation of the pitch motor, and controls the excitation current to be input into the pitch motor by the pitch drive at a third preset current value that is less than the rated current of the pitch motor.

9. A condensation removal device for a variable pitch motor of a wind turbine generator set adopts the condensation removal method according to any one of claims 1 to 8, characterized in that: It includes: A pitch drive, a pitch motor electrically connected to the pitch drive, a first temperature sensor disposed on the pitch motor and electrically connected to the pitch drive, a second temperature sensor electrically connected to the pitch drive, a humidity sensor electrically connected to the pitch drive, and a power supply electrically connected to the pitch drive; The humidity sensor is used to collect environmental humidity data, the first temperature sensor is used to collect body temperature data of the pitch motor, and the second temperature sensor is used to collect environmental temperature data.

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