Low-temperature starting method and device for wind turbine generator

Abstract

The invention provides a low-temperature starting method and device for a wind turbine generator, and relates to the technical field of wind power generation. According to the method, an allowable working lowest temperature threshold value and a plurality of low-temperature threshold values related to the temperature of a gearbox oil pool of the wind turbine generator set are set, a plurality of temperature intervals are set based on the allowable working lowest temperature threshold value and the low-temperature threshold values, and the low-temperature threshold values are all larger than the allowable working lowest temperature threshold value; in the standby state of the wind turbine generator, continuously monitoring the temperature of a gearbox oil pool; according to the temperature interval in which the temperature of the gearbox oil pool is located, hierarchical low-temperature starting logic control is conducted on the wind turbine generator, and the low-temperature starting logic control comprises control over a gearbox heater, control over a gearbox lubricating pump high / low speed pump, control over the wind turbine generator from starting to grid connection and power control over the wind turbine generator after grid connection.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a low-temperature starting method and device for a wind turbine set. Background Art

[0002] As an important renewable energy source, wind farms have been widely used around the world. Especially in my country's northeast, northwest and plateau regions, wind energy resources are abundant. The climatic conditions in these regions determine that wind farms are usually built in cold environments at high latitudes or high altitudes. However, the winter temperatures in these cold regions are extremely low, and extreme low temperatures of -20℃ or even lower often occur, which limits the operating performance of wind turbines in low temperature environments. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, one purpose of the present application is to propose a low-temperature starting method for a wind turbine set, by setting a minimum allowable operating temperature threshold and multiple low-temperature thresholds related to the gearbox oil pool temperature of the wind turbine set, and setting multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low-temperature thresholds, wherein the low-temperature thresholds are all greater than the minimum allowable operating temperature threshold; when the wind turbine set is in standby state, the gearbox oil pool temperature is continuously monitored; according to the temperature range in which the gearbox oil pool temperature is located, the wind turbine set is subjected to hierarchical low-temperature starting logic control, and the low-temperature starting logic control includes: controlling the gearbox heater, controlling the high / low speed pump of the gearbox lubrication pump, controlling the wind turbine set from startup to grid connection, and controlling the power after grid connection.

[0005] The second objective of the present application is to provide a low-temperature starting device for a wind turbine.

[0006] The third objective of the present application is to provide an electronic device.

[0007] A fourth object of the present application is to provide a non-transitory computer-readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] To achieve the above-mentioned purpose, the first aspect embodiment of the present application proposes a low-temperature starting method for a wind turbine set, by setting a minimum allowable operating temperature threshold and multiple low-temperature thresholds related to the gearbox oil pool temperature of the wind turbine set, and setting multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low-temperature thresholds, wherein the low-temperature thresholds are all greater than the minimum allowable operating temperature threshold; when the wind turbine set is in standby state, the gearbox oil pool temperature is continuously monitored; according to the temperature range in which the gearbox oil pool temperature is located, the wind turbine set is subjected to hierarchical low-temperature starting logic control, and the low-temperature starting logic control includes: controlling the gearbox heater, controlling the high / low speed pump of the gearbox lubrication pump, controlling the wind turbine set from starting to grid connection, and controlling the power after grid connection.

[0010] According to one embodiment of the present application, multiple low temperature thresholds include a first low temperature threshold, a second low temperature threshold, a third low temperature threshold and a fourth low temperature threshold, wherein the low temperature thresholds decrease in sequence from the first to the fourth low temperature thresholds, and the wind turbine is controlled from startup to grid connection and the power control after grid connection, including: in response to the gear box oil pool temperature being greater than or equal to the allowable minimum operating temperature threshold, and less than the fourth low temperature threshold, keeping the wind turbine in a standby state; in response to the gear box oil pool temperature being greater than or equal to the fourth low temperature threshold, and less than the third low temperature threshold, controlling the wind turbine to start at low temperature and run at idle; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, controlling the wind turbine to start, and when it is monitored that the high-speed shaft speed of the wind turbine reaches the grid-connected speed, switching the wind turbine from a grid-connected power generation state; when the wind turbine is in a grid-connected power generation state, limiting the power generation power of the wind turbine based on the relationship between the gear box oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold.

[0011] According to one embodiment of the present application, the power generation of a wind turbine is limited based on the relationship between the gearbox oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold, including: setting a first power threshold and a second power threshold, the first power threshold is greater than the second power threshold, and the first power threshold and the second power threshold are both less than the rated power of the wind turbine; in response to the gearbox oil pool temperature being greater than or equal to the third low temperature threshold, and less than the second low temperature threshold, controlling the power generation of the wind turbine to be not greater than the second power threshold; in response to the gearbox oil pool temperature being greater than or equal to the second low temperature threshold, and less than the first low temperature threshold, controlling the power generation of the wind turbine to be not greater than the first power threshold; in response to the gearbox oil pool temperature being greater than or equal to the first low temperature threshold, controlling the wind turbine to generate electricity at rated power.

[0012] According to one embodiment of the present application, the power generation of a wind turbine is limited based on the relationship between the gearbox oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold, including: setting a third power threshold, the third power threshold is less than the rated power of the wind turbine; in response to the gearbox oil pool temperature being greater than or equal to the third low temperature threshold, and less than the first low temperature threshold, controlling the power generation of the wind turbine to be not greater than the third power threshold; in response to the gearbox oil pool temperature being greater than or equal to the first low temperature threshold, controlling the wind turbine to generate electricity at the rated power.

[0013] According to an embodiment of the present application, the third low temperature threshold and the fourth low temperature threshold are divided into at least one low temperature sub-interval, and the gearbox oil pool temperature in different low temperature sub-intervals corresponds to different stages of idling operation of the wind turbine.

[0014] According to one embodiment of the present application, the gearbox heater is controlled, including: setting a gearbox heater stop temperature threshold and a gearbox heater start temperature threshold, wherein the second low temperature threshold, the gearbox heater stop temperature threshold, the gearbox heater start temperature threshold, and the third low temperature threshold decrease in sequence; in response to the gearbox oil pool temperature being lower than the gearbox heater start temperature threshold, controlling the gearbox heater to be in an on state for heating; in response to monitoring that the gearbox oil pool temperature is greater than or equal to the gearbox heater stop temperature threshold, controlling the gearbox heater to be in an off state.

[0015] According to one embodiment of the present application, the high / low speed pump of the gearbox lubrication pump is controlled, including: setting a high-speed and low-speed pump switching temperature threshold corresponding to the gearbox lubrication pump, wherein the high-speed and low-speed pump switching temperature threshold is greater than a first low-temperature threshold; in response to the gearbox oil pool temperature being greater than or equal to a fourth low-temperature threshold and less than the high-speed and low-speed pump switching temperature threshold, controlling the gearbox lubrication pump low-speed pump to be in an on state, and controlling the gearbox lubrication pump high-speed pump to be in an off state; in response to the gearbox oil pool temperature being greater than the high-speed and low-speed pump switching temperature threshold, controlling the gearbox lubrication pump low-speed pump to be in an off state, and controlling the gearbox lubrication pump high-speed pump to be in an on state.

[0016] To achieve the above-mentioned purpose, the second aspect embodiment of the present application proposes a low-temperature starting device for a wind turbine, including: a setting module, used to set a minimum allowable operating temperature threshold and multiple low-temperature thresholds related to the gearbox oil pool temperature of the wind turbine, and set multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low-temperature thresholds, wherein the low-temperature thresholds are all greater than the minimum allowable operating temperature threshold; a monitoring module, used to continuously monitor the gearbox oil pool temperature when the wind turbine is in standby mode; a control module, used to perform hierarchical low-temperature starting logic control on the wind turbine according to the temperature range in which the gearbox oil pool temperature is located, and the low-temperature starting logic control includes: controlling the gearbox heater, controlling the high / low speed pump of the gearbox lubrication pump, controlling the wind turbine from starting to grid connection, and controlling the power after grid connection.

[0017] According to one embodiment of the present application, multiple low temperature thresholds include a first low temperature threshold, a second low temperature threshold, a third low temperature threshold and a fourth low temperature threshold, wherein the low temperature thresholds decrease in sequence from the first to the fourth low temperature thresholds, and the control module is also used to: in response to the gear box oil pool temperature being greater than or equal to the minimum allowable operating temperature threshold, and less than the fourth low temperature threshold, keep the wind turbine in a standby state; in response to the gear box oil pool temperature being greater than or equal to the fourth low temperature threshold, and less than the third low temperature threshold, control the wind turbine to start at low temperature and run idle; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, control the wind turbine to start, and when it is monitored that the high-speed shaft speed of the wind turbine reaches the grid-connected speed, switch the wind turbine from a grid-connected power generation state; when the wind turbine is in a grid-connected power generation state, limit the power generation power of the wind turbine based on the relationship between the gear box oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold.

[0018] According to one embodiment of the present application, the control module is also used to: set a first power threshold and a second power threshold, the first power threshold is greater than the second power threshold, and both the first power threshold and the second power threshold are less than the rated power of the wind turbine set; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, and less than the second low temperature threshold, control the wind turbine set's power generation power to be no greater than the second power threshold; in response to the gear box oil pool temperature being greater than or equal to the second low temperature threshold, and less than the first low temperature threshold, control the wind turbine set's power generation power to be no greater than the first power threshold; in response to the gear box oil pool temperature being greater than or equal to the first low temperature threshold, control the wind turbine set to generate electricity at rated power.

[0019] According to one embodiment of the present application, the control module is also used to: set a third power threshold, the third power threshold is less than the rated power of the wind turbine; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, and less than the first low temperature threshold, control the wind turbine power generation power to be no greater than the third power threshold; in response to the gear box oil pool temperature being greater than or equal to the first low temperature threshold, control the wind turbine to generate electricity at the rated power.

[0020] According to one embodiment of the present application, the control module is also used to: divide the third low temperature threshold and the fourth low temperature threshold into at least one low temperature sub-interval, and the gear box oil pool temperature in different low temperature sub-intervals corresponds to different stages of idling operation of the wind turbine.

[0021] According to one embodiment of the present application, the control module is also used to: set a gearbox heater stop temperature threshold and a gearbox heater start temperature threshold, wherein the second low temperature threshold, the gearbox heater stop temperature threshold, the gearbox heater start temperature threshold, and the third low temperature threshold decrease in sequence; in response to the gearbox oil pool temperature being lower than the gearbox heater start temperature threshold, controlling the gearbox heater to be in an on state for heating; in response to monitoring that the gearbox oil pool temperature is greater than or equal to the gearbox heater stop temperature threshold, controlling the gearbox heater to be in an off state.

[0022] According to one embodiment of the present application, the control module is also used to: set the high-speed and low-speed pump switching temperature thresholds corresponding to the gearbox lubrication pump, wherein the high-speed and low-speed pump switching temperature thresholds are greater than the first low-temperature threshold; in response to the gearbox oil pool temperature being greater than or equal to the fourth low-temperature threshold and less than the high-speed and low-speed pump switching temperature threshold, control the gearbox lubrication pump low-speed pump to an on state, and control the gearbox lubrication pump high-speed pump to an off state; in response to the gearbox oil pool temperature being greater than the high-speed and low-speed pump switching temperature threshold, control the gearbox lubrication pump low-speed pump to an off state, and control the gearbox lubrication pump high-speed pump to an on state.

[0023] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the low-temperature starting method of a wind turbine as described in the first aspect embodiment of the present application.

[0024] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the low-temperature starting method of a wind turbine as described in the first aspect embodiment of the present application.

[0025] To achieve the above-mentioned purpose, the fifth embodiment of the present application proposes a computer program product, including a computer program, which, when executed by a processor, implements the low-temperature starting method for a wind turbine as described in the first embodiment of the present application.

[0026] The present application achieves at least the following beneficial effects: the present application ensures that the wind turbine can be started smoothly under low temperature conditions by setting multiple temperature intervals related to the gearbox oil pool temperature and performing different control operations in different temperature intervals; the hierarchical low-temperature start-up logic control ensures the normal operation of each component during the startup process and reduces the risk of failure and shutdown caused by low temperature; through precise control of the gearbox heater and lubrication pump, the appropriate temperature and viscosity of the lubricating oil inside the gearbox can be maintained at low temperatures, ensuring the fluidity and lubrication effect of the lubricating oil, effectively reducing friction losses, reducing the wear of mechanical parts, and improving the working efficiency and service life of the unit; effectively reducing the impact of low temperature on the start-up, lubrication and power generation of the unit, the wind turbine can maintain a high operating efficiency in low temperature weather, increase the annual utilization hours, and thereby improve the overall power generation income of the wind farm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 It is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator set shown in an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator set shown in an embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator set shown in an embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator set shown in an embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of a low-temperature starting device for a wind turbine set shown in one embodiment of the present application.

[0033] Figure 6 It is a schematic diagram of an electronic device shown in one embodiment of the present application. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0035] Figure 1 is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator system shown in the present application, such as Figure 1 As shown, the low temperature starting method of the wind turbine generator set comprises the following steps:

[0036] S101, setting a minimum allowable operating temperature threshold and multiple low temperature thresholds related to the gearbox oil pool temperature of the wind turbine generator set, and setting multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low temperature thresholds, wherein the low temperature thresholds are all greater than the minimum allowable operating temperature threshold.

[0037] S102, when the wind turbine is in standby mode, continuously monitor the gearbox oil pool temperature.

[0038] S103, according to the temperature range of the gearbox oil pool temperature, the wind turbine is subjected to hierarchical low-temperature starting logic control, the low-temperature starting logic control includes: controlling the gearbox heater, controlling the high / low speed pump of the gearbox lubrication pump, controlling the wind turbine from starting to grid connection, and controlling the power after grid connection.

[0039] The embodiment of the present application proposes a low-temperature starting method for a wind turbine, comprising: setting a minimum allowable operating temperature threshold and multiple low-temperature thresholds related to the gearbox oil pool temperature of the wind turbine, and setting multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low-temperature thresholds, wherein the low-temperature thresholds are all greater than the minimum allowable operating temperature threshold; when the wind turbine is in standby mode, continuously monitoring the gearbox oil pool temperature; performing hierarchical low-temperature starting logic control on the wind turbine according to the temperature range in which the gearbox oil pool temperature is located, the low-temperature starting logic control includes: controlling the gearbox heater, controlling the high / low speed pump of the gearbox lubrication pump, controlling the wind turbine from starting to grid connection, and controlling the power after grid connection.

[0040] The present application ensures that the wind turbine can be started smoothly under low temperature conditions by setting multiple temperature intervals related to the gearbox oil pool temperature and performing different control operations in different temperature intervals; the hierarchical low-temperature start-up logic control ensures the normal operation of each component during the startup process and reduces the risk of failure and shutdown caused by low temperature; through precise control of the gearbox heater and lubrication pump, the appropriate temperature and viscosity of the lubricating oil inside the gearbox can be maintained at low temperatures, ensuring the fluidity and lubrication effect of the lubricating oil, effectively reducing friction losses, reducing the wear of mechanical parts, and improving the working efficiency and service life of the unit; effectively reducing the impact of low temperature on the start-up, lubrication and power generation of the unit, the wind turbine can maintain a high operating efficiency in low temperature weather, increase the annual utilization hours, and thereby improve the overall power generation income of the wind farm.

[0041] Figure 2 is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator system shown in the present application, such as Figure 2 As shown, the low temperature starting method of the wind turbine generator set comprises the following steps:

[0042] Step 1. The threshold setting logic, the control logic of the gearbox heater, and the control logic of the gearbox lubrication pump high / low speed pump in this application are introduced in turn below.

[0043] 1.1. Threshold setting logic.

[0044] A minimum allowable operating temperature threshold t_low and multiple low temperature thresholds related to the gearbox oil pool temperature of the wind turbine are set, and multiple temperature intervals are set based on the minimum allowable operating temperature threshold t_low and the multiple low temperature thresholds, wherein the low temperature thresholds are all greater than the minimum allowable operating temperature threshold t_low, and the multiple low temperature thresholds include a first low temperature threshold t1, a second low temperature threshold t2, a third low temperature threshold t3 and a fourth low temperature threshold t4, wherein the low temperature thresholds decrease in sequence from the first to the fourth low temperature thresholds, that is, t_low<t4<t3<t2<t1.

[0045] 1.2. Control logic of gearbox heater.

[0046] The gear box heater stop temperature threshold t_heat_off and the gear box heater start temperature threshold t_heat_on are set, wherein the second low temperature threshold t2, the gear box heater stop temperature threshold t_heat_off, the gear box heater start temperature threshold t_heat_on, and the third low temperature threshold t3 decrease in sequence (i.e., t2>t_heat_off>t_heat_on>t3); if the gear box oil pool temperature is lower than the gear box heater start temperature threshold t_heat_on, the gear box heater is controlled to be in the on state for heating; after the heating gradually increases in temperature, if it is monitored that the gear box oil pool temperature is greater than or equal to the gear box heater stop temperature threshold t_heat_off, the gear box heater is controlled to be in the off state.

[0047] 1.3. Control logic of high / low speed pump of gearbox lubrication pump.

[0048] Set the high-speed and low-speed pump switching temperature threshold t_Pumb corresponding to the gearbox lubrication pump, wherein the high-speed and low-speed pump switching temperature threshold t_Pumb is greater than the first low-temperature threshold t1; if the gearbox oil pool temperature is greater than or equal to the fourth low-temperature threshold t4 and less than the high-speed and low-speed pump switching temperature threshold t_Pumb, control the gearbox lubrication pump low-speed pump to be in the on state, and control the gearbox lubrication pump high-speed pump to be in the off state; if the gearbox oil pool temperature is greater than the high-speed and low-speed pump switching temperature threshold t_Pumb, control the gearbox lubrication pump low-speed pump to be in the off state, and control the gearbox lubrication pump high-speed pump to be in the on state.

[0049] In the second step, the process of wind turbines switching from standby state to grid-connected state is described in detail below.

[0050] 2.1. When the wind turbine is in standby mode, the gearbox oil pool temperature t_Oil is continuously monitored.

[0051] 2.2. If the gearbox oil pool temperature t_Oil is greater than or equal to the minimum allowable operating temperature threshold t_low, and is less than the fourth low temperature threshold t4, the wind turbine is kept in standby mode, and based on the control logic of the above-mentioned gearbox heater, the gearbox heater is controlled to be turned on for heating, waiting for the oil temperature to rise.

[0052] 2.3. If the gearbox oil pool temperature t_Oil is greater than or equal to the fourth low temperature threshold value t4, and less than the third low temperature threshold value t3, the wind turbine is controlled to start at low temperature and run at idle speed. Based on the control logic of the above-mentioned gearbox heater and the control logic of the high / low speed pump of the gearbox lubrication pump, the low speed pump of the gearbox lubrication pump is controlled to be on, the high speed pump of the gearbox lubrication pump is controlled to be off, and the gearbox heater is controlled to be on for heating, waiting for the oil temperature to rise.

[0053] 2.4. If the gearbox oil pool temperature t_Oil is greater than or equal to the third low temperature threshold t3, the wind turbine is controlled to start, and when it is monitored that the high-speed shaft speed of the wind turbine reaches the grid-connected speed, the wind turbine is switched from the grid-connected power generation state.

[0054] In the third step, the control logic of the wind turbine in the grid-connected power generation state is introduced in detail below.

[0055] 3.1. When the wind turbine is in a grid-connected power generation state, a first power threshold K1 and a second power threshold K2 are set. The first power threshold K1 is greater than the second power threshold K2, and both the first power threshold K1 and the second power threshold K2 are less than the rated power of the wind turbine.

[0056] 3.2. When the wind turbine is in the grid-connected power generation state, if the gearbox oil pool temperature t_Oil is greater than or equal to the third low temperature threshold t3, and less than the second low temperature threshold t2, the power generation of the wind turbine is controlled not to be greater than the second power threshold K2. Based on the control logic of the above-mentioned gearbox heater and the control logic of the high / low speed pump of the gearbox lubrication pump, the low speed pump of the gearbox lubrication pump is controlled to be turned on, the high speed pump of the gearbox lubrication pump is controlled to be turned off, and when the gearbox oil pool temperature t_Oil is lower than the gearbox heater start temperature threshold t_heat_on, the gearbox heater is controlled to be turned on for heating; if it is monitored that the gearbox oil pool temperature is greater than or equal to the gearbox heater stop temperature threshold t_heat_off, the gearbox heater is controlled to be turned off.

[0057] 3.3. When the wind turbine is in the grid-connected power generation state, if the gearbox oil pool temperature t_Oil is greater than or equal to the second low temperature threshold t2, and less than the first low temperature threshold t1, the power generation of the wind turbine is controlled not to be greater than the first power threshold K1. Based on the control logic of the above-mentioned gearbox heater and the control logic of the high / low speed pump of the gearbox lubrication pump, the low speed pump of the gearbox lubrication pump is controlled to be in the on state, the high speed pump of the gearbox lubrication pump is controlled to be in the off state, and the gearbox heater is controlled to be in the off state.

[0058] 3.4. When the wind turbine is in the grid-connected power generation state, if the gearbox oil pool temperature t_Oil is greater than or equal to the first low temperature threshold t1, the wind turbine is controlled to generate electricity at rated power. Based on the above control logic of the gearbox heater and the control logic of the high / low speed pump of the gearbox lubrication pump, within this interval, the gearbox heater is controlled to be in the off state. If the gearbox oil pool temperature t_Oil is less than the high-speed and low-speed pump switching temperature threshold t_Pumb at the same time, the gearbox lubrication pump low-speed pump is controlled to be in the on state, and the gearbox lubrication pump high-speed pump is controlled to be in the off state; if the gearbox oil pool temperature is greater than the high-speed and low-speed pump switching temperature threshold t_Pumb, the gearbox lubrication pump low-speed pump is controlled to be in the off state, and the gearbox lubrication pump high-speed pump is controlled to be in the on state.

[0059] Figure 3 is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator system shown in the present application, such as Figure 3 As shown, the low temperature starting method of the wind turbine generator set comprises the following steps:

[0060] Figure 3 The low temperature start-up method of the wind turbine shown in the figure is similar to the above method in the first step (threshold setting logic, gear box heater control logic, gear box lubrication pump high / low speed pump control logic), the second step (the process of the wind turbine from standby state to grid connection state) and the second step (the process of the wind turbine from standby state to grid connection state). Figure 2 The processes described in are the same and will not be repeated here.

[0061] In this embodiment, Figure 2 The control logic of the corresponding embodiment in the grid-connected power generation state is changed as follows:

[0062] When the wind turbine generator set is in a grid-connected power generation state, a third power threshold K3 is set, and the third power threshold K3 is less than the rated power of the wind turbine generator set.

[0063] If the gearbox oil pool temperature is greater than or equal to the third low temperature threshold t3 and less than the first low temperature threshold t1, the power generation power of the wind turbine generator set is controlled not to be greater than the third power threshold K3.

[0064] If the gear box oil pool temperature is greater than or equal to the first low temperature threshold t1, the wind turbine generator set is controlled to generate electricity at rated power.

[0065] Figure 4 is a schematic diagram of an exemplary implementation of a low-temperature starting method for a wind turbine generator system shown in the present application, such as Figure 4 As shown, the low temperature starting method of the wind turbine generator set comprises the following steps:

[0066] Figure 4The low temperature start-up method of the wind turbine shown in the figure is similar to the above method in the first step (threshold setting logic, gear box heater control logic, gear box lubrication pump high / low speed pump control logic) and the third step (grid-connected power generation state control logic). Figure 2 The processes described in are the same and will not be repeated here.

[0067] In this embodiment, Figure 2 The corresponding embodiment has changed the process of the wind turbine generator set from the standby state to the grid-connected state. Specifically, Figure 2 Steps 2.1, 2.2, and 2.4 in the above code have not been changed. Figure 2 Step 2.3 of the invention: if the gearbox oil pool temperature t_Oil is greater than or equal to the fourth low temperature threshold value t4, and less than the third low temperature threshold value t3, the wind turbine is controlled to start at low temperature and run at idle speed. This step is modified to: divide the interval between the third low temperature threshold value and the fourth low temperature threshold value into at least one low temperature sub-interval (for example, Figure 4 The low temperature threshold t3_1 shown in the figure may be located between t3 and t4, so as to divide the third low temperature threshold and the fourth low temperature threshold into two low temperature sub-intervals), and the gearbox oil pool temperature in different low temperature sub-intervals corresponds to different stages of idling operation of the wind turbine.

[0068] Above Figure 2 , Figure 3 , Figure 4 There are three figures in total that introduce three implementation methods respectively. By setting multiple temperature intervals related to the gearbox oil pool temperature and performing different control operations in different temperature intervals, it is ensured that the wind turbine can be started smoothly under low temperature conditions; the hierarchical low-temperature start-up logic control ensures the normal operation of each component during the startup process and reduces the risk of failure and shutdown caused by low temperature; through precise control of the gearbox heater and lubrication pump, the appropriate temperature and viscosity of the lubricating oil inside the gearbox can be maintained at low temperatures to ensure the fluidity and lubrication effect of the lubricating oil, effectively reduce friction losses, reduce wear of mechanical parts, and improve the working efficiency and service life of the unit; effectively reduce the impact of low temperature on the start-up, lubrication and power generation of the unit, the wind turbine can maintain a high operating efficiency in low temperature weather, increase the annual utilization hours, and thus improve the overall power generation income of the wind farm.

[0069] Figure 5 is a schematic diagram of a low-temperature starting device for a wind turbine generator set shown in the present application, such as Figure 5 As shown, the low temperature starting device 500 of a wind turbine generator system includes a setting module 501, a monitoring module 502 and a control module 503, wherein:

[0070] A setting module 501 is used to set a minimum allowable operating temperature threshold and multiple low temperature thresholds related to the gearbox oil pool temperature of the wind turbine generator set, and set multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low temperature thresholds, wherein the low temperature thresholds are all greater than the minimum allowable operating temperature threshold;

[0071] The monitoring module 502 is used to continuously monitor the gearbox oil pool temperature when the wind turbine is in standby mode;

[0072] The control module 503 is used to perform hierarchical low-temperature startup logic control on the wind turbine according to the temperature range of the gear box oil pool temperature. The low-temperature startup logic control includes: controlling the gear box heater, controlling the high / low speed pump of the gear box lubrication pump, controlling the wind turbine from startup to grid connection, and power control after grid connection.

[0073] This device sets multiple temperature intervals related to the gearbox oil pool temperature and performs different control operations in different temperature intervals to ensure that the wind turbine can be started smoothly under low temperature conditions; the hierarchical low-temperature start-up logic control ensures the normal operation of each component during the startup process and reduces the risk of failure and shutdown caused by low temperature; through precise control of the gearbox heater and lubrication pump, it can maintain the appropriate temperature and viscosity of the lubricating oil inside the gearbox at low temperatures, ensure the fluidity and lubrication effect of the lubricating oil, effectively reduce friction loss, reduce wear of mechanical parts, and improve the working efficiency and service life of the unit; effectively reduce the impact of low temperature on the start-up, lubrication and power generation of the unit, the wind turbine can maintain a high operating efficiency in low temperature weather, increase the annual utilization hours, and thus improve the overall power generation income of the wind farm.

[0074] Furthermore, the multiple low temperature thresholds include a first low temperature threshold, a second low temperature threshold, a third low temperature threshold and a fourth low temperature threshold, wherein the low temperature thresholds decrease in sequence from the first to the fourth low temperature thresholds, and the control module 503 is also used to: in response to the gear box oil pool temperature being greater than or equal to the allowable minimum operating temperature threshold, and less than the fourth low temperature threshold, keep the wind turbine in a standby state; in response to the gear box oil pool temperature being greater than or equal to the fourth low temperature threshold, and less than the third low temperature threshold, control the wind turbine to start at low temperature and run at idle speed; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, control the wind turbine to start, and when it is monitored that the high-speed shaft speed of the wind turbine reaches the grid-connected speed, switch the wind turbine from a grid-connected power generation state; when the wind turbine is in a grid-connected power generation state, limit the power generation power of the wind turbine based on the relationship between the gear box oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold.

[0075] Furthermore, the control module 503 is also used to: set a first power threshold and a second power threshold, the first power threshold is greater than the second power threshold, and both the first power threshold and the second power threshold are less than the rated power of the wind turbine set; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, and less than the second low temperature threshold, control the wind turbine set's power generation power to be no greater than the second power threshold; in response to the gear box oil pool temperature being greater than or equal to the second low temperature threshold, and less than the first low temperature threshold, control the wind turbine set's power generation power to be no greater than the first power threshold; in response to the gear box oil pool temperature being greater than or equal to the first low temperature threshold, control the wind turbine set to generate electricity at rated power.

[0076] Furthermore, the control module 503 is also used to: set a third power threshold, the third power threshold is less than the rated power of the wind turbine; in response to the gear box oil pool temperature being greater than or equal to the third low temperature threshold, and less than the first low temperature threshold, control the wind turbine power generation power to be no greater than the third power threshold; in response to the gear box oil pool temperature being greater than or equal to the first low temperature threshold, control the wind turbine to generate electricity at the rated power.

[0077] Furthermore, the control module 503 is also used to: divide the third low temperature threshold and the fourth low temperature threshold into at least one low temperature sub-interval, and the gearbox oil pool temperature in different low temperature sub-intervals corresponds to different stages of idling operation of the wind turbine.

[0078] Furthermore, the control module 503 is also used to: set a gear box heater stop temperature threshold and a gear box heater start temperature threshold, wherein the second low temperature threshold, the gear box heater stop temperature threshold, the gear box heater start temperature threshold, and the third low temperature threshold decrease in sequence; in response to the gear box oil pool temperature being lower than the gear box heater start temperature threshold, controlling the gear box heater to be in an on state for heating; in response to monitoring that the gear box oil pool temperature is greater than or equal to the gear box heater stop temperature threshold, controlling the gear box heater to be in an off state.

[0079] Furthermore, the control module 503 is also used to: set the high-speed and low-speed pump switching temperature thresholds corresponding to the gear box lubrication pump, wherein the high-speed and low-speed pump switching temperature thresholds are greater than the first low-temperature threshold; in response to the gear box oil pool temperature being greater than or equal to the fourth low-temperature threshold and less than the high-speed and low-speed pump switching temperature threshold, control the gear box lubrication pump low-speed pump to an on state, and control the gear box lubrication pump high-speed pump to an off state; in response to the gear box oil pool temperature being greater than the high-speed and low-speed pump switching temperature threshold, control the gear box lubrication pump low-speed pump to an off state, and control the gear box lubrication pump high-speed pump to an on state.

[0080] In order to implement the above embodiment, the present application embodiment further proposes an electronic device 600, such as Figure 6As shown, the electronic device 600 includes: a processor 601 and a memory 602 communicatively connected to the processor, the memory 602 stores instructions executable by at least one processor, and the instructions are executed by at least one processor 601 to implement the low-temperature starting method of the wind turbine set as shown in the above embodiment.

[0081] In order to implement the above embodiment, the embodiment of the present application also proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to implement the low-temperature starting method of the wind turbine set as shown in the above embodiment.

[0082] In order to implement the above embodiments, the embodiments of the present application further provide a computer program product, including a computer program, which, when executed by a processor, implements the low-temperature starting method for a wind turbine as shown in the above embodiments.

[0083] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A low temperature starting method for a wind turbine, characterized in that: include: Setting a minimum allowable operating temperature threshold and multiple low temperature thresholds related to the gearbox oil pool temperature of the wind turbine generator set, and setting multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low temperature thresholds, wherein the low temperature thresholds are all greater than the minimum allowable operating temperature threshold; When the wind turbine is in standby mode, the gearbox oil pool temperature is continuously monitored; According to the temperature range of the gearbox oil pool temperature, the wind turbine set is subjected to hierarchical low-temperature startup logic control, and the low-temperature startup logic control includes: controlling the gearbox heater, controlling the high / low speed pump of the gearbox lubrication pump, controlling the wind turbine set from startup to grid connection, and controlling the power after grid connection.

2. The method according to claim 1, characterized in that The multiple low temperature thresholds include a first low temperature threshold, a second low temperature threshold, a third low temperature threshold and a fourth low temperature threshold, wherein the low temperature thresholds decrease in sequence from the first to the fourth low temperature thresholds, and the control of the wind turbine from startup to grid connection and the power control after grid connection includes: In response to the gearbox oil pool temperature being greater than or equal to the allowable minimum operating temperature threshold and less than the fourth low temperature threshold, maintaining the wind turbine generator set in a standby state; In response to the gearbox oil pool temperature being greater than or equal to the fourth low temperature threshold and less than the third low temperature threshold, controlling the wind turbine to start at low temperature and run at idle speed; In response to the gearbox oil pool temperature being greater than or equal to the third low temperature threshold, controlling the wind turbine to start, and switching the wind turbine to a grid-connected power generation state when monitoring that the high-speed shaft speed of the wind turbine reaches a grid-connected speed; When the wind turbine is in a grid-connected power generation state, the power generation of the wind turbine is limited based on the relationship between the gearbox oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold.

3. The method according to claim 2, characterized in that The method of limiting the power generation of the wind turbine generator set based on the relationship between the gear box oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold comprises: Setting a first power threshold and a second power threshold, wherein the first power threshold is greater than the second power threshold, and both the first power threshold and the second power threshold are less than the rated power of the wind turbine generator set; In response to the gearbox oil pool temperature being greater than or equal to the third low temperature threshold and less than the second low temperature threshold, controlling the wind turbine generator set to generate a power not greater than the second power threshold; In response to the gearbox oil pool temperature being greater than or equal to the second low temperature threshold, and less than the first low temperature threshold, controlling the wind turbine generator set to generate a power not greater than the first power threshold; In response to the gear box oil pool temperature being greater than or equal to the first low temperature threshold, the wind turbine generator set is controlled to generate electricity at the rated power.

4. The method according to claim 2, characterized in that: The method of limiting the power generation of the wind turbine generator set based on the relationship between the gear box oil pool temperature and the first low temperature threshold, the second low temperature threshold and the third low temperature threshold comprises: Setting a third power threshold, wherein the third power threshold is less than the rated power of the wind turbine generator set; In response to the gearbox oil pool temperature being greater than or equal to the third low temperature threshold, and less than the first low temperature threshold, controlling the wind turbine generator set to generate a power not greater than the third power threshold; In response to the gear box oil pool temperature being greater than or equal to the first low temperature threshold, the wind turbine generator set is controlled to generate electricity at the rated power.

5. The method according to claim 2, characterized in that: The third low temperature threshold and the fourth low temperature threshold are divided into at least one low temperature sub-interval, and the gearbox oil pool temperature in different low temperature sub-intervals corresponds to different stages of idling operation of the wind turbine generator set.

6. The method according to any one of claims 2 to 5, wherein controlling the gearbox heater comprises: Setting a gearbox heater stop temperature threshold and a gearbox heater start temperature threshold, wherein the second low temperature threshold, the gearbox heater stop temperature threshold, the gearbox heater start temperature threshold, and the third low temperature threshold decrease in sequence; In response to the gearbox oil pool temperature being lower than the gearbox heater start-up temperature threshold, controlling the gearbox heater to be in a start-up heating state; After the temperature is gradually increased, in response to monitoring that the temperature of the gearbox oil pool is greater than or equal to the gearbox heater stop temperature threshold, the gearbox heater is controlled to be in a closed state.

7. The method according to any one of claims 2 to 5, wherein the controlling the high / low speed pump of the gearbox lubrication pump comprises: Setting a high-speed and low-speed pump switching temperature threshold corresponding to the gear box lubrication pump, wherein the high-speed and low-speed pump switching temperature threshold is greater than the first low temperature threshold; In response to the gearbox oil pool temperature being greater than or equal to the fourth low temperature threshold and less than the high-speed pump switching temperature threshold, controlling the gearbox lubrication pump low-speed pump to be in an on state, and controlling the gearbox lubrication pump high-speed pump to be in an off state; In response to the gearbox oil pool temperature being greater than the high-speed and low-speed pump switching temperature threshold, the gearbox lubrication pump low-speed pump is controlled to be in an off state, and the gearbox lubrication pump high-speed pump is controlled to be in an on state.

8. A low temperature starting device for a wind turbine, characterized in that: include: A setting module, used to set a minimum allowable operating temperature threshold and multiple low temperature thresholds related to the gearbox oil pool temperature of the wind turbine generator set, and set multiple temperature intervals based on the minimum allowable operating temperature threshold and the multiple low temperature thresholds, wherein the low temperature thresholds are all greater than the minimum allowable operating temperature threshold; A monitoring module is used to continuously monitor the gearbox oil pool temperature when the wind turbine is in standby mode; A control module is used to perform hierarchical low-temperature startup logic control on the wind turbine set according to the temperature range of the gear box oil pool temperature. The low-temperature startup logic control includes: controlling the gear box heater, controlling the high / low speed pump of the gear box lubrication pump, controlling the wind turbine set from startup to grid connection, and power control after grid connection.

9. An electronic device, comprising: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-7.

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