Cooling system, method and device of wind generating set

Abstract

The invention discloses a cooling system, method and device of a wind generating set, and relates to the technical field of wind power generation. The cooling system comprises a cooling loop, the cooling loop comprises a cooling pump station, a cooling medium, a connecting assembly and a plurality of cooling branches connected in parallel, the connecting assembly communicates between the cooling pump station and the cooling branches, the cooling pump station drives the cooling medium to circularly flow in the cooling loop, and each cooling branch comprises N heat exchange assemblies connected in series, n is an integer greater than or equal to 2; wherein the outlet of the cooling pump station is respectively connected with the inlet of each cooling branch, and the inlet of the cooling pump station is respectively connected with the outlet of each cooling branch. In other words, when the cooling system is designed, the heat exchange assemblies are connected in series, so that the number of parts can be reduced, the cost is reduced, and the economical efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a cooling system, method and device for a wind generator set. Background Art

[0002] With the development of wind turbines, the unit capacity of the unit is increasing, and the heat consumption of the unit is also increasing. In order to ensure the normal and efficient operation of the unit, it is necessary to cool the heat generating components such as the generator, converter, gearbox, etc.

[0003] The current cooling solutions are costly when cooling components such as generators, converters, and gearboxes. Summary of the invention

[0004] The embodiments of the present application provide a cooling system, method and device for a wind turbine generator set, which can reduce the cooling cost of the set.

[0005] In a first aspect, an embodiment of the present application provides a cooling system for a wind turbine generator set, comprising a cooling circuit, the cooling circuit comprising a cooling pump station, a cooling medium, a connecting component and a plurality of parallel cooling branches, the connecting component being connected between the cooling pump station and the cooling branch, the cooling pump station driving the cooling medium to circulate in the cooling circuit, the cooling branch comprising N series-connected heat exchange components, N being an integer greater than or equal to 2;

[0006] The outlet of the cooling pump station is connected to the inlet of each cooling branch respectively, and the inlet of the cooling pump station is connected to the outlet of each cooling branch respectively.

[0007] In a second aspect, an embodiment of the present application provides a cooling method for a wind turbine generator set, which is applied to a cooling system of the wind turbine generator set as described in the first aspect. The cooling method includes:

[0008] When the cooling pump station operates at the first frequency, obtaining a first outlet temperature of the cooling pump station and a temperature difference of a target heat exchange component, the target heat exchange component being at least one of the N heat exchange components, and the temperature difference being a difference between an outlet temperature and an inlet temperature of the target heat exchange component;

[0009] The cooling pump station is frequency-controlled according to at least one of the first outlet temperature and the temperature difference.

[0010] In a third aspect, an embodiment of the present application provides a cooling device for a wind turbine generator set, the cooling device comprising:

[0011] an acquisition module, used for acquiring a first outlet temperature of the cooling pump station and a temperature difference of a target heat exchange component when the cooling pump station operates at a first frequency, the target heat exchange component being at least one of the N heat exchange components, and the temperature difference being a difference between an outlet temperature and an inlet temperature of the target heat exchange component;

[0012] The control module is used to perform frequency conversion control on the cooling pump station according to at least one of the first outlet temperature and the temperature difference.

[0013] In a fourth aspect, an embodiment of the present application provides an electronic device, including:

[0014] processor;

[0015] a memory for storing computer program instructions;

[0016] When the computer program instructions are executed by the processor, the method according to the second aspect is implemented.

[0017] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the method described in the second aspect is implemented.

[0018] The cooling system of the embodiment of the present application includes a cooling circuit, the cooling circuit includes a cooling pump station, a cooling medium, a connecting component and a plurality of parallel cooling branches, the connecting component is connected between the cooling pump station and the cooling branch, the cooling pump station drives the cooling medium to circulate in the cooling circuit, and the cooling branch includes N series-connected heat exchange components, where N is an integer greater than or equal to 2; wherein the outlet of the cooling pump station is respectively connected to the inlet of each cooling branch, and the inlet of the cooling pump station is respectively connected to the outlet of each cooling branch. That is, when designing the cooling system of the embodiment of the present application, multiple heat exchange components are connected in series, thereby reducing the number of components, reducing costs, and improving economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0020] Figure 1 A structural diagram of a cooling system for a wind turbine generator set provided in an embodiment of the present application;

[0021] Figure 2 A structural diagram of another cooling system of a wind turbine generator set provided in an embodiment of the present application;

[0022] Figure 3 A structural diagram of another cooling system of a wind turbine generator set provided in an embodiment of the present application;

[0023] Figure 4 A flow chart of a cooling method for a wind turbine generator set provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of a frequency conversion control process of a cooling pump provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of a cooling enhancement judgment process provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of frequency conversion control based on enhanced cooling provided in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of frequency conversion control after a heater is started provided in an embodiment of the present application;

[0028] Fig. 9 A structural diagram of a cooling device for a wind turbine generator set provided in an embodiment of the present application;

[0029] Fig.10 A structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0031] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the guyed tower and wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] Related technology When cooling a wind turbine, a cooling system is usually designed for each heat-generating component, and the cooling systems of the heat-generating components are independent of each other.

[0033] For example, for the heat generating components such as generators, converters and gearboxes, it is necessary to design a cooling system for the generator, a cooling system for the converter and a cooling system for the gearbox. The three cooling systems are independent of each other, which requires more parts and higher costs.

[0034] To this end, embodiments of the present application provide a cooling system, method, and device for a wind turbine generator set, which can reduce the cooling cost of the wind turbine generator set.

[0035] The cooling system, method and device of the wind turbine generator set provided in the embodiments of the present application are described in detail below through specific embodiments.

[0036] Figure 1 A structural diagram of a cooling system of a wind turbine generator set provided in an embodiment of the present application, such as Figure 1 As shown, the cooling system of the wind turbine generator set comprises a cooling circuit 10 , and the cooling circuit 10 comprises a cooling pump station 101 , a cooling medium 102 , a connecting component 103 and a plurality of parallel cooling branches 104 .

[0037] The cooling pump station 101 drives the cooling medium 102 to circulate in the cooling circuit 10. During the circulation process, the cooling medium 102 can take away the heat of the heating component, thereby cooling the heating component.

[0038] The outlet of the cooling pump station 101 is connected to the inlet of each cooling branch 104 respectively, and the inlet of the cooling pump station 101 is connected to the outlet of each cooling branch 104 respectively, that is, the embodiment of the present application connects each cooling branch 104 in parallel, thereby improving the cooling efficiency of the wind turbine.

[0039] Exemplarily, the cooling pump station 101 may include a mechanical pump. The heat generating components may include, but are not limited to, a gear box, a generator, a transformer, a converter, and the like.

[0040] The cooling medium 102 may be water or other cooling liquids, which is not limited in the embodiment of the present application.

[0041] The connection assembly 103 is connected between the cooling pump station 101 and the cooling branch 104, so that the cooling medium 102 can circulate in the cooling circuit 10 to achieve the purpose of cooling. Exemplarily, the connection assembly 103 and the cooling pump station 101 and the cooling branch 104 can be detachably connected, for example, through mechanical threaded connection, so that when the connection assembly 103 is abnormal, it can be easily replaced.

[0042] The cooling branch 104 includes a plurality of heat exchange components 1041 connected in series. Figure 1Taking two cooling branches 104 , each cooling branch 104 including three heat exchange components 1041 as an example, in actual application, the number of cooling branches 104 and the heat exchange components 1041 on each cooling branch 104 can be adjusted according to the number and demand of heat exchange components.

[0043] The heat exchange component 1041 is used to transfer the heat generated by the heat generating component to the cooling medium 102 to cool the corresponding heat generating component. Exemplarily, a heat generating component may include one or more heat exchange components 1041.

[0044] For example, when the same heat generating component includes a plurality of heat exchanging components 1041 , each heat exchanging component 1041 may be respectively arranged in a different cooling branch 104 , thereby improving the cooling efficiency.

[0045] The number of heat exchange components 1041 included in each cooling branch 104 may be the same or different. Figure 1 For example, each cooling branch 104 includes the same number of heat exchange components 1041 .

[0046] Exemplarily, different heat exchange components 1041 in the same cooling branch 104 may correspond to different heating components. For example, the heating component corresponding to heat exchange component 1 may be a generator, the heating component corresponding to heat exchange component 2 may be a converter, and the heating component corresponding to heat exchange component 3 may be a transformer.

[0047] Exemplarily, the heat generating components corresponding to each heat exchange component 1041 in each cooling branch 104 may be the same. For example, heat exchange components 1 and 4 correspond to heat generating component A, heat exchange components 2 and 5 correspond to heat generating component B, and heat exchange components 3 and 6 correspond to heat generating component C. Heat generating component A, heat generating component B, and heat generating component C may be different.

[0048] Compared with the traditional solution of designing an independent cooling system for each heat generating component, the embodiment of the present application connects the heat exchange components 1041 of multiple heat generating components in series, which can reduce the number of parts required to cool each heat generating component, reduce costs, and improve economy, and can cool each heat generating component at the same time. At the same time, multiple heat exchange components 1041 are arranged on different cooling branches 104, which can improve cooling efficiency.

[0049] In some embodiments, the cooling order of each heat exchange component can be determined according to at least one of the thermal properties and operating conditions of the heat-generating component corresponding to each heat exchange component.

[0050] That is, Figure 1The order of the heat exchange components 1041 on the middle cooling branch 104 (ie, the cooling order of the corresponding heat generating components) is determined according to at least one of the thermal properties and operating conditions of the heat generating components corresponding to the heat exchange components 1041 .

[0051] The thermal properties may include the specific heat of the heat generating component, and the specific heat is used to characterize the sensitivity of the heat generating component to temperature changes. For example, the larger the specific heat of the heat generating component, the smaller its sensitivity to temperature changes.

[0052] The operating condition of the heating component may be the temperature required for the normal operation of the heating component, for example, may include the minimum inlet temperature and the maximum inlet temperature of the cooling medium 102 allowed by each heating component.

[0053] The cooling sequence of each heat generating component can be determined based on the thermal properties and / or operating conditions of the heat generating component to improve economic efficiency.

[0054] Taking the thermal properties including specific heat as an example, assuming that the specific heats of the heat-generating components corresponding to heat exchange component 1, heat exchange component 2 and heat exchange component 3 increase successively, the heat-generating components can be cooled in the order of first cooling the heat-generating components corresponding to heat exchange component 1, then cooling the heat-generating components corresponding to heat exchange component 2, and finally cooling the heat-generating components corresponding to heat exchange component 3. This can reduce the materials used for cooling the heat-generating components with small specific heat, thereby reducing costs.

[0055] For example, for generators, converters and transformers, since the sensitivity of generators, converters and transformers to temperature changes decreases in sequence, when cooling the generators, converters and transformers, they can be cooled in the order of first the generator, then the converter and finally the transformer.

[0056] The embodiments of the present application determine the cooling order of each heat-generating component based on the thermal properties and / or operating conditions of the heat-generating component, which can reduce costs and improve economy.

[0057] like Figure 2 As shown, taking the cooling branch 104 including two as an example, namely the first cooling branch 104A and the second cooling branch 104B, taking the cooling of the gearbox, generator, converter, transformer and cabin environment of the wind turbine as an example, in actual application, two cabin heat exchangers are usually arranged in the cabin. Similarly, the generator, converter, transformer and gearbox are also usually configured with two heat exchangers to improve the cooling efficiency.

[0058] Based on the above considerations, for example, reference Figure 2 The first cooling branch 104A includes a first cabin heat exchanger 104A1, a first generator heat exchanger 104A2, a first converter heat exchanger 104A3, a first gearbox heat exchanger 104A4 and a first transformer heat exchanger 104A5 which are connected in series in sequence;

[0059] The second cooling branch 104B includes a second cabin heat exchanger 104B1 , a second generator heat exchanger 104B2 , a second converter heat exchanger 104B3 , a second gearbox heat exchanger 104B4 and a second transformer heat exchanger 104B5 which are sequentially connected in series.

[0060] The outlet of the cooling pump station 101 is connected to the inlet of the first cabin heat exchanger 104A1 and the inlet of the second cabin heat exchanger 104B1 respectively, and the inlet of the cooling pump station 101 is connected to the outlet of the first transformer heat exchanger 104A5 and the outlet of the second transformer heat exchanger 104B5 respectively.

[0061] The first cabin heat exchanger 104A1 and the second cabin heat exchanger 104B1 are used to cool the cabin environment, the first generator heat exchanger 104A2 and the second generator heat exchanger 104B2 are used to cool the backpack and water jacket of the generator respectively, the first converter heat exchanger 104A3 and the second converter heat exchanger 104B3 are used to cool the converter, the first gearbox heat exchanger 104A4 and the second gearbox heat exchanger 104B4 are used to cool the gearbox, and the first transformer heat exchanger 104A5 and the second transformer heat exchanger 104B5 are used to cool the transformer.

[0062] Since the cabin environment has less heat dissipation than the generator, converter, gearbox and transformer, and the specific heat of the generator, converter, gearbox and transformer increases successively, that is, the sensitivity to temperature changes decreases successively, the cabin environment is cooled first, and the cooling medium 102 obtained is at a lower temperature, and then the generator is cooled, which can reduce the use of effective materials in the generator, thereby reducing the cooling cost. Then, cooling the converter, gearbox and transformer separately can not only achieve the cooling effect, but also because the sensitivity of the converter, gearbox and transformer to temperature changes decreases successively, as the temperature of the cooling medium 102 increases, the converter, gearbox and transformer can still work normally.

[0063] The embodiment of the present application adopts a series connection method to cool the cabin environment, generator, converter, gearbox and transformer in sequence, which can not only reduce the number of parts required to cool each heat-generating component and reduce costs, but also cool the cabin environment and heat-generating components such as generators at the same time. At the same time, in view of the fact that two cabin heat exchangers are arranged in the cabin and other heat-generating components are usually equipped with two heat exchangers, the two heat exchangers of the same heat-generating component are respectively arranged on different branches to obtain two parallel branches, thereby improving the cooling efficiency. That is, the embodiment of the present application adopts a combination of series and parallel connection to design the cooling system, which improves the cooling efficiency while reducing the cooling cost.

[0064] In some embodiments, Figure 3As shown, the cooling pump station 101 may include a cooling pump 1010, a three-way valve 1011 and a radiator 1012;

[0065] The inlet of the three-way valve 1011 is connected to the outlet of each cooling branch 104 respectively, the first outlet of the three-way valve 1011 is connected to the inlet of the radiator 1012, and the outlet of the radiator 1012 and the second outlet of the three-way valve 1011 are connected to the inlet of the cooling pump 1010 respectively.

[0066] Exemplarily, the three-way valve 1011 can be an electric three-way valve. When each heat generating component needs to be cooled, the inlet of the three-way valve 1011 can be controlled to be connected to the first outlet, so that the cooling medium 102 in the cooling circuit 10 can reach the radiator 1012 through the three-way valve 1011. After the heat is dissipated by the radiator 1012, the low-temperature cooling medium 102 returns to the cooling pump 1010 and enters the next cycle, thereby achieving the cooling purpose. Among them, when the inlet of the three-way valve 1011 is connected to the first outlet, it is also called the cooling circuit 10 switching to the external circulation.

[0067] For example, in some scenarios, the converter needs to be heated. At this time, the inlet of the three-way valve 1011 can be controlled to be connected to the second outlet, so that the cooling medium 102 in the cooling circuit 10 can directly return to the cooling pump 1010 through the three-way valve 1011, and no longer pass through the radiator 1012, thereby avoiding the temperature drop of the cooling medium 102. When the inlet of the three-way valve 1011 is connected to the second outlet, it is also called that the cooling circuit 10 is switched to the internal circulation.

[0068] The embodiment of the present application does not limit the type, material and structure of the radiator 1012, and any radiator 1012 that can reduce the temperature of the cooling medium can be applied to the embodiment of the present application. For example, the radiator 1012 can be an air-cooled radiator, a water-cooled radiator, etc.

[0069] The embodiment of the present application can achieve the two purposes of cooling and heating by controlling the connectivity between the inlet and two outlets of the three-way valve, thereby being applicable to more scenarios. In addition, the cooling of the entire wind turbine is achieved through a cooling pump, thereby improving the integration and reliability of the cooling system.

[0070] In some embodiments, Figure 3 As shown, the cooling circuit 10 may also include a temperature sensor TT, a pressure sensor PT, a heater H, a butterfly valve M, a flow meter Q, etc. Figure 3 Only some components in the cooling circuit 10 are listed as examples, and in actual application, they can be adjusted as needed.

[0071] The temperature sensor TT is used to monitor the temperature. For example, a temperature sensor TT may be provided at the outlet of each heat exchanger, so that the outlet temperature of each heat exchanger can be monitored in real time and abnormalities can be discovered in time.

[0072] The pressure sensor PT is used to monitor pressure. For example, pressure sensors PT may be provided at the inlet and outlet of the cooling pump 1010 to monitor the inlet pressure and outlet pressure of the cooling pump 1010 in real time to ensure that the cooling pump 1010 operates within the allowable pressure range.

[0073] The heater H is used to meet the heating requirements of components such as the converter. The flow meter Q is used to monitor the flow of the cooling medium 102 in each cooling branch 104. For example, the flow meter Q can be set at the entrance of each cooling branch 104. The butterfly valve M is used to adjust the flow of the cooling medium 102 in the cooling circuit 10. In the cooling circuit 10 of the embodiment of the present application, more butterfly valves M are set, so as to meet the temperature requirements of different components.

[0074] For example, when the flow rate is Q1, if the outlet temperature of a heat exchanger is high based on the monitoring of the temperature sensor TT, the butterfly valve M can be adjusted to increase the flow rate of the cooling medium 102, so as to reduce the outlet temperature of the heat exchanger.

[0075] The embodiment of the present application comprehensively considers the thermal properties, operating conditions and other characteristics of each heat-generating component, and at the same time, in view of the characteristics of the same heat-generating component having multiple heat exchange components, a cooling system is designed by combining series and parallel connections, thereby reducing the use of components, thereby reducing costs and avoiding the problem of a relatively high failure rate of the cooling system due to the large number of components used, thereby improving the economy and reliability of the entire cooling system.

[0076] Based on the above cooling system, an embodiment of the present application further provides a cooling method for a wind turbine generator set, which can be applied to the cooling system in any of the above embodiments.

[0077] like Figure 4 As shown, the cooling method may include the following steps:

[0078] S410. When the cooling pump station operates at a first frequency, obtain a first outlet temperature of the cooling pump station and a temperature difference of a target heat exchange component.

[0079] The target heat exchange component is at least one of the N heat exchange components, and the temperature difference is the difference between the outlet temperature and the inlet temperature of the target heat exchange component.

[0080] S420. Perform frequency conversion control on the cooling pump station according to at least one of the first outlet temperature and the temperature difference.

[0081] The above steps are described in detail below:

[0082] In S410, illustratively, the first frequency may be the initial operating frequency of the cooling pump, or the operating frequency adopted by the cooling pump when the heating request of the converter is not received. Exemplarily, the first frequency may be 50% of the rated frequency. For the convenience of description, the embodiment of the present application records 50% of the rated frequency as 50% frequency. Initially, controlling the cooling pump to start at a lower frequency can reduce the impact of the cooling medium on the cooling pump, which has a protective effect on the cooling pump.

[0083] The first outlet temperature is the outlet temperature of the cooling pump station, that is, the outlet temperature of the cooling pump. The outlet temperature can be measured by a temperature sensor arranged at the outlet of the cooling pump.

[0084] The target heat exchange component may be at least one of the N heat exchange components. For example, the target heat exchange component may include but is not limited to heat exchange components of heat-generating components such as converters, generators, and gear boxes.

[0085] The temperature difference of the target heat exchange component is the difference between the outlet temperature and the inlet temperature of the target heat exchange component. The outlet temperature of the target heat exchange component can be measured by a temperature sensor set at the outlet of the target heat exchange component. The inlet temperature of the target heat exchange component is the outlet temperature of the previous heat exchange component. Therefore, the inlet temperature of the target heat exchange component can be measured by a temperature sensor set at the outlet of the previous heat exchange component.

[0086] Exemplarily, when the cooling pump operates at a first frequency, the first outlet temperature of the cooling pump, the inlet temperature and the outlet temperature of the target heat exchange component can be obtained by a temperature sensor, providing a temperature basis for subsequent execution of a variable frequency control strategy for the cooling pump.

[0087] In S420, the cooling pump station may be frequency-controlled according to the first outlet temperature of the cooling pump and / or the temperature difference of the target heat exchange component, thereby improving economic efficiency.

[0088] Exemplarily, when the first outlet temperature of the cooling pump is high, the operating frequency of the cooling pump may be increased, for example, the operating frequency of the cooling pump may be increased from the first frequency to the second frequency to increase the flow rate of the cooling medium and improve the cooling efficiency.

[0089] Exemplarily, when the first outlet temperature of the cooling pump is low and the temperature difference of the target heat exchange component is small, the operating frequency of the cooling pump can be increased. For example, the operating frequency of the cooling pump can be reduced from the first frequency to the third frequency to reduce the flow rate of the cooling medium and improve economy.

[0090] The embodiment of the present application can flexibly adjust the operating frequency of the cooling pump based on the outlet temperature of the cooling pump and the temperature difference of the target heat exchange component, thereby realizing variable frequency control of the cooling pump and improving economy while meeting temperature requirements.

[0091] In some embodiments, the above S420 may include the following steps:

[0092] In response to the first outlet temperature being greater than or equal to a first threshold, controlling the cooling pump station to operate at a second frequency, the second frequency being greater than the first frequency;

[0093] In response to the temperature difference being less than the second threshold and the first outlet temperature being less than a third threshold, the cooling pump station is controlled to operate at a third frequency, the third frequency being less than the first frequency.

[0094] The first threshold, the second threshold, and the third threshold can be set according to actual needs. When the cooling pump operates at different frequencies, the first threshold, the second threshold, and the third threshold can vary. For example, for the first threshold, when the cooling pump operates at 50% frequency, the first threshold can be set to 21°C, and when the cooling pump operates at 60% frequency, the first threshold can be set to 27°C. The second threshold is similar to the third threshold.

[0095] Exemplarily, when the first outlet temperature of the cooling pump is greater than or equal to the first threshold, that is, the outlet temperature is high, the flow rate of the cooling medium can be increased, that is, the operating frequency of the cooling pump can be increased at this time. For example, the cooling pump can be controlled to operate at a second frequency, and the second frequency is greater than the first frequency.

[0096] Exemplarily, when the first outlet temperature of the cooling pump is less than the first threshold, the operating frequency of the cooling pump may be determined further in combination with the temperature difference of the target heat exchange component.

[0097] For example, when the first outlet temperature of the cooling pump is less than the first threshold value, and the temperature difference of the target heat exchange component is greater than or equal to the second threshold value, the cooling pump can be controlled to continue to operate at the second frequency. When the temperature difference of the target heat exchange component is less than the second threshold value, and the first outlet temperature of the cooling pump is less than the third threshold value, the operating frequency of the cooling pump can be reduced, for example, the cooling pump can be controlled to operate at a third frequency, and the third frequency is less than the first frequency. Exemplarily, the third threshold value is less than the first threshold value.

[0098] Taking the target heat exchange component as an inverter heat exchanger as an example, the inverter heat exchanger here can be the first inverter heat exchanger in the above embodiment, or it can be the second inverter heat exchanger. In actual application, the outlet temperature of the first inverter heat exchanger and the second inverter heat exchanger can be the same, and the inlet temperature can also be the same.

[0099] like Figure 5As shown, assuming that the cooling pump initially operates at 50% frequency, when the first outlet temperature of the cooling pump is greater than or equal to 21°C (the first threshold), the cooling pump can be controlled to operate at 60% frequency; when the first outlet temperature of the cooling pump is less than 21°C and the temperature difference of the converter heat exchanger is greater than or equal to 7k (the second threshold), the cooling pump can be controlled to operate at 60% frequency; when the first outlet temperature of the cooling pump is less than 21°C and the temperature difference of the converter heat exchanger is less than 7k, the cooling pump can continue to be controlled to operate at 50% frequency.

[0100] Exemplarily, when the cooling pump operates at a frequency of 60%, when the first outlet temperature of the cooling pump is greater than or equal to 27°C (first threshold), the cooling pump can be controlled to operate at a frequency of 70%; when the first outlet temperature of the cooling pump is less than 27°C and the temperature difference of the converter heat exchanger is greater than or equal to 7k (second threshold), the cooling pump can be controlled to operate at a frequency of 70%; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is less than 19°C, the cooling pump can be controlled to operate at a frequency of 50%; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is greater than or equal to 19°C, the cooling pump can be controlled to operate at a frequency of 60%.

[0101] Exemplarily, when the cooling pump operates at a frequency of 70%, when the first outlet temperature of the cooling pump is greater than or equal to 33°C (first threshold), the cooling pump can be controlled to operate at a frequency of 80%; when the first outlet temperature of the cooling pump is less than 33°C and the temperature difference of the converter heat exchanger is greater than or equal to 7k (second threshold), the cooling pump can be controlled to operate at a frequency of 80%; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is less than 25°C, the cooling pump can be controlled to operate at a frequency of 60%; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is greater than or equal to 25°C, the cooling pump can be controlled to operate at a frequency of 70%.

[0102] Exemplarily, when the cooling pump operates at 80% frequency, when the first outlet temperature of the cooling pump is greater than or equal to 37°C (first threshold), the cooling pump can be controlled to operate at 90% frequency; when the first outlet temperature of the cooling pump is less than 37°C and the temperature difference of the converter heat exchanger is greater than or equal to 7k (second threshold), the cooling pump can be controlled to operate at 90% frequency; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is less than 31°C, the cooling pump can be controlled to operate at 70% frequency; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is greater than or equal to 31°C, the cooling pump can be controlled to operate at 80% frequency.

[0103] Exemplarily, when the cooling pump operates at a frequency of 90%, when the first outlet temperature of the cooling pump is greater than or equal to 41°C (first threshold), the cooling pump can be controlled to operate at a frequency of 100%; when the first outlet temperature of the cooling pump is less than 41°C and the temperature difference of the converter heat exchanger is greater than or equal to 7k (second threshold), the cooling pump can be controlled to operate at a frequency of 100%; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is less than 35°C, the cooling pump can be controlled to operate at a frequency of 80%; when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is greater than or equal to 35°C, the cooling pump can be controlled to operate at a frequency of 90%.

[0104] For example, when the cooling pump operates at 100% frequency, when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is less than 39°C, the cooling pump can be controlled to operate at 90% frequency, and when the temperature difference of the converter heat exchanger is less than 7k and the first outlet temperature of the cooling pump is greater than or equal to 39°C, the cooling pump can be controlled to operate at 100% frequency. When the temperature difference of the converter heat exchanger is greater than or equal to 7k, an alarm is issued.

[0105] By dividing the operating frequency of the cooling pump into several levels of 50%, 60%, 70%, 80%, 90% and 100%, refined control of the operating frequency of the cooling pump is achieved, which can further reduce the cooling cost. In actual application, the operating frequency of the cooling pump can also be divided into other levels, which is not limited in the embodiments of the present application.

[0106] The embodiment of the present application can adjust the operating frequency of the cooling pump based on the outlet temperature of the cooling pump and the temperature difference of the target heat exchange component in real time, thereby realizing variable frequency control of the cooling pump, reducing the self-consumption of electricity of the unit, and improving economy.

[0107] In some embodiments, when the cooling pump operates at the first frequency, the cooling method may further include the following steps:

[0108] Acquire a temperature parameter of the target object, the temperature parameter of the target object comprising at least one of a temperature of a generator winding, a temperature rise of the winding, an oil pool temperature of a gearbox, a bearing temperature of the gearbox, and an oil temperature of a transformer;

[0109] In response to the temperature parameter of the target object satisfying the enhanced cooling condition, the cooling pump station is controlled to operate at a fourth frequency, where the fourth frequency is greater than the first frequency.

[0110] Exemplarily, the target object may be a component with a high temperature or a high temperature rise. When it is monitored that the temperature or the temperature rise of the target object is high, the operating frequency of the cooling pump may be increased to enhance cooling.

[0111] By way of example, the target objects may include, but are not limited to, windings of a generator, an oil sump of a gearbox, bearings, and a transformer.

[0112] The temperature parameters may include, but are not limited to, the temperature and temperature rise of the target object, for example, the temperature of the generator winding, the temperature rise of the winding, the temperature of the oil pool, the temperature of the bearing, and the oil temperature of the transformer.

[0113] The temperature of the target object can be measured by a corresponding temperature sensor, and the temperature rise can be determined based on the difference between the temperature of the target object and the ambient temperature.

[0114] When the temperature parameter of the target object meets the enhanced cooling condition, an enhanced cooling instruction may be generated, and the operating frequency of the cooling pump may be increased based on the enhanced cooling instruction. For example, the cooling pump may be controlled to operate at a fourth frequency, which is greater than the first frequency. That is, the cooling effect is accelerated by increasing the flow rate of the cooling medium.

[0115] Exemplarily, when at least one of the temperature of the generator winding, the temperature rise of the winding, the oil pool temperature of the gearbox, the bearing temperature of the gearbox, and the oil temperature of the transformer is abnormal, it is considered that the enhanced cooling condition is met.

[0116] For example, Figure 6 As shown, the temperature of the generator winding can be determined first. For example, when the temperature of the generator winding is greater than or equal to 135°C, the temperature rise of the winding can be further determined. If the temperature rise of the winding is greater than or equal to 105K, it is considered that the enhanced cooling condition is met and an enhanced cooling instruction can be generated.

[0117] Exemplarily, when the temperature of the generator winding is less than 135°C or the winding temperature rise is less than 105K, the oil pool temperature of the gearbox can be further judged. When the oil pool temperature of the gearbox is greater than 70°C, if the bearing temperature is greater than 80°C, it is considered that the enhanced cooling conditions are met and an enhanced cooling instruction can be generated.

[0118] When the gearbox oil pool temperature is less than or equal to 70°C, or the bearing temperature is less than or equal to 80°C, the transformer oil temperature can be further determined. If the transformer oil temperature is greater than 75°C, it is considered that the enhanced cooling condition is met and an enhanced cooling instruction can be generated. If the transformer oil temperature is less than or equal to 75°C, the next cycle can be entered for re-determination.

[0119] The above thresholds, such as 135°C, 105K, 70°C, etc., can be adjusted according to actual needs. Figure 6 Just one example.

[0120] For example, Figure 7As shown, when the cooling pump operates at a certain frequency, in addition to judging the first outlet temperature of the cooling pump and the temperature difference of the target heat exchange component, it can also be judged whether an enhanced cooling instruction is received. When an enhanced cooling instruction is received, the operating frequency can be increased based on the current frequency. When no enhanced cooling instruction is received, the operation can continue to be performed at the current frequency. Figure 7 Taking the cooling pump operating at 50% frequency as an example, in actual application, when the cooling pump operates at 60% frequency, 70% frequency, etc., it can also be determined whether the enhanced cooling instruction is received.

[0121] When the cooling pump station operates at the first frequency, the embodiment of the present application can monitor in real time the heat-generating components with higher temperatures, such as the generator winding, the oil pool of the gear box, the bearings, and the oil pool of the transformer, and when at least one of them is abnormal, the operating frequency of the cooling pump can be increased in time to ensure the safe and normal operation of the wind turbine.

[0122] In some scenarios, the converter may need to be heated. For example, when the converter is restarted after being shut down for a long time, the converter needs to be heated; when the surface of the converter is wet or condensation occurs, the converter needs to be heated.

[0123] For example, when the inverter is started, the start time of the inverter can be recorded, and then the historical records can be searched to obtain the most recent shutdown time of the inverter, so as to determine the length of time since the last shutdown of the inverter. If the duration is greater than the preset duration, a heating request can be sent to the main control of the wind turbine set.

[0124] For example, when it is detected that the surface of the converter is wet or condensation occurs, the converter may send a heating request to the main control of the wind turbine generator set.

[0125] When a heating request is received, the master controller needs to adjust the current control strategy. Based on this, in some embodiments, the cooling method may further include the following steps:

[0126] In response to the wind turbine generator set being started, determining whether a heating request for the converter is received;

[0127] In response to not receiving a heating request from the converter, controlling the cooling pump station to operate at a first frequency;

[0128] In response to receiving a heating request from the converter, obtaining the ambient temperature of the wind turbine generator set at the current moment and the outlet temperature parameters of the generator within a preset time period;

[0129] Control the three-way valve to switch to the inner circulation loop, which is the cooling loop in the cooling loop except the radiator;

[0130] According to the ambient temperature and the outlet temperature parameters of the generator within a preset time, the opening of the three-way valve is controlled to adjust the temperature of the cooling medium in the internal circulation loop.

[0131] Exemplarily, after the wind turbine generator set is started, it may first be determined whether a heating request of the converter is received, so as to determine a subsequent control strategy.

[0132] If no heating request from the converter is received, the cooling pump can be controlled to operate at the first frequency. If a heating request from the converter is received, the inlet of the three-way valve needs to be controlled to be connected to the second outlet so that the cooling medium flows in the internal circulation loop to meet the heating requirements.

[0133] In the internal circulation loop, in order to avoid condensation on the surfaces of components such as connecting pipes and heat exchangers due to rapid temperature changes of the cooling medium and a large temperature difference with the ambient temperature, thereby affecting their service life, the opening of the three-way valve can be controlled. For example, the opening of the three-way valve can be controlled to increase gradually.

[0134] For example, the opening of the three-way valve may be controlled based on the ambient temperature of the wind turbine generator set and the outlet temperature parameters of the generator, so as to adjust the opening of the three-way valve in real time.

[0135] The outlet temperature parameters of the generator within a preset time period may include but are not limited to the outlet temperature of the generator at the current moment and the outlet temperature difference between the generator at the current moment and the previous moment.

[0136] When the wind turbine is started, the embodiment of the present application fully considers the heating demand of the inverter. When no heating request from the inverter is received, the cooling pump can be controlled to operate at a first frequency. When a heating request from the inverter is received, the three-way valve can be controlled to allow the cooling medium to flow in the internal circulation loop. At the same time, the opening of the three-way valve is controlled based on the ambient temperature of the wind turbine and the outlet temperature parameters of the generator, which can effectively avoid condensation on the surfaces of connecting pipes and components such as heat exchangers.

[0137] Taking the example that the outlet temperature parameter of the generator within the preset time includes the second outlet temperature of the generator at the current moment and the outlet temperature difference of the generator at the current moment and the moment before the current moment, illustratively, the above “according to the ambient temperature and the outlet temperature parameter of the generator within the preset time, controlling the opening of the three-way valve to adjust the temperature of the cooling medium in the inner circulation loop” may include the following steps:

[0138] In response to the ambient temperature being lower than the first temperature threshold, the second outlet temperature being higher than the second temperature threshold, and the outlet temperature difference being higher than or equal to the third temperature threshold, controlling the three-way valve to operate at a first opening degree;

[0139] In response to the ambient temperature being greater than or equal to the first temperature threshold and less than the fourth temperature threshold, and the outlet temperature difference being greater than or equal to the fifth temperature threshold, controlling the three-way valve to operate at a second opening degree;

[0140] In response to the ambient temperature being greater than or equal to a fourth temperature threshold, and the outlet temperature difference being greater than or equal to a sixth temperature threshold, controlling the three-way valve to operate at a third opening degree;

[0141] Among them, the first opening, the second opening and the third opening increase in sequence.

[0142] The sizes of the first temperature threshold to the sixth temperature threshold can be set according to actual needs. For example, the first temperature threshold can be set to 0°C, the second temperature threshold can be set to 19°C, the third temperature threshold can be set to 0.7°C, the fourth temperature threshold can be set to 20°C, the fifth temperature threshold can be set to 1.4°C, and the sixth temperature threshold can be set to 2°C.

[0143] For example, a judgment may be made every two seconds, that is, the outlet temperature of the generator at the current moment and the outlet temperature 2 seconds ago may be collected, and the difference between the outlet temperature at the current moment and the outlet temperature 2 seconds ago may be used as the outlet temperature difference of the generator. Of course, other time lengths may also be set.

[0144] Exemplarily, when the ambient temperature is less than 0°C and the generator outlet temperature (second outlet temperature) at the current moment is greater than 19°C, if the generator outlet temperature difference is greater than or equal to 0.7°C, the three-way valve is controlled to operate at the first opening.

[0145] Exemplarily, when the ambient temperature is greater than or equal to 0°C and less than 20°C, if the outlet temperature difference of the generator is greater than or equal to 1.4°C, the opening of the three-way valve is increased. For example, the three-way valve can be controlled to operate at a second opening, which is greater than the first opening.

[0146] Exemplarily, when the ambient temperature is greater than 20°C, if the generator outlet temperature difference is greater than or equal to 2°C, the opening of the three-way valve can be further increased, for example, the three-way valve can be controlled to operate at a third opening, which is greater than the second opening.

[0147] The sizes of the first opening, the second opening and the third opening can be determined according to actual needs. For example, the difference between two adjacent openings can be the same, for example, the difference between the first opening and the second opening can be the same as the difference between the second opening and the third opening. Of course, the first opening, the second opening and the third opening can also be random, as long as they meet the relationship that the first opening, the second opening and the third opening increase in sequence. For example, the third opening can be 100% opening.

[0148] When the temperature of the cooling medium needs to be lowered, the opening of the three-way valve can be reduced. For example, the connection between the inlet and the second outlet of the three-way valve can be directly disconnected, or the opening of the inlet and the second outlet of the three-way valve can be gradually reduced.

[0149] Taking the gradual reduction of the opening of the three-way valve as an example, illustratively, when the ambient temperature is less than the first temperature threshold, the second outlet temperature is less than the seventh temperature threshold, and the outlet temperature difference is less than or equal to the eighth temperature threshold, the three-way valve is controlled to operate at the fourth opening;

[0150] When the ambient temperature is greater than or equal to the first temperature threshold and less than the fourth temperature threshold, and the outlet temperature difference is less than or equal to the ninth temperature threshold, the three-way valve is controlled to operate according to the fifth opening degree;

[0151] When the ambient temperature is greater than or equal to the fourth temperature threshold, and the outlet temperature difference is less than or equal to the tenth temperature threshold, the three-way valve is controlled to operate according to the sixth opening degree;

[0152] Among them, the fourth opening, the fifth opening and the sixth opening decrease in sequence.

[0153] Exemplarily, the seventh temperature threshold may be set to 29°C, the eighth temperature threshold may be set to -0.7°C, the ninth temperature threshold may be set to -1.4°C, and the tenth temperature threshold may be set to -2°C.

[0154] That is, when the outlet temperature of the generator is less than 29° C. and the outlet temperature difference shows a downward trend, the opening of the three-way valve can be gradually reduced to reduce the flow rate of the cooling medium and adjust the temperature of the cooling medium.

[0155] In the embodiment of the present application, when the cooling circuit is an internal circulation circuit, the opening of the three-way valve can be controlled in combination with the ambient temperature of the wind turbine set and the outlet temperature and outlet temperature difference of the generator. Especially when the outlet temperature difference of the generator shows an upward trend, the opening of the three-way valve can be controlled to slowly increase the temperature of the cooling medium, thereby avoiding a large deviation from the ambient temperature due to a rapid temperature rise, which would cause condensation on the surfaces of components such as connecting pipes and heat exchangers and affect their service life.

[0156] In some embodiments, after “according to the ambient temperature and the outlet temperature parameter of the generator within a preset time, the opening of the three-way valve is controlled to adjust the temperature of the cooling medium in the internal circulation loop”, the cooling method may further include the following steps:

[0157] In response to the heater of the cooling pump station being started and the cooling pump station operating at a fifth frequency, the cooling pump station is frequency-controlled according to at least one of whether the heating request is eliminated and an outlet temperature of the generator, the fifth frequency being greater than the first frequency.

[0158] Exemplarily, after receiving a heating request from the converter, the heater needs to be started to increase the temperature of the cooling medium to meet the heating demand.

[0159] After the heater is started, the cooling pump can be frequency-controlled in combination with whether the heating request of the converter is eliminated and the outlet temperature of the generator, so as to reduce the energy consumption of the cooling pump while meeting the needs of various components.

[0160] Exemplarily, when the heater is initially started, the cooling pump may be controlled to operate at 50% frequency for a period of time, such as 2 minutes, and then the cooling pump may be controlled to operate at the fifth frequency. Exemplarily, the fifth frequency may be 100% frequency.

[0161] For example, when the cooling pump is running at 100% frequency, if the heating request of the converter is eliminated, the operating frequency of the cooling pump can be reduced, so that the energy consumption of the cooling pump can be reduced while meeting the converter demand.

[0162] For example, during the period when the cooling pump operates at 100% frequency, if the heating request of the converter is not eliminated, the cooling pump may be further controlled by frequency conversion in combination with the outlet temperature of the generator.

[0163] After the heater is started, the embodiment of the present application can perform frequency control on the cooling pump in combination with whether the heating request of the inverter is eliminated and / or the outlet temperature of the generator. While meeting the requirements of each component, the energy consumption of the cooling pump is reduced and the economy is improved.

[0164] Exemplarily, the above-mentioned “performing variable frequency control on the cooling pump station according to at least one of whether the heating request is eliminated and the outlet temperature of the generator” may include the following steps:

[0165] In response to the heating request being eliminated, controlling the heater to be turned off, and switching the operating frequency of the cooling pump station from the fifth frequency to the first frequency;

[0166] In response to the heating request not being eliminated and the generator outlet temperature being greater than a first threshold, the heater is controlled to be turned off, and in response to the generator outlet temperature being greater than a second threshold and the heating request being eliminated, the operating frequency of the cooling pump station is switched from the fifth frequency to the first frequency.

[0167] For example, if the heating request of the converter is eliminated, the heater can be controlled to be turned off and the operating frequency of the cooling pump can be reduced. If the heating request is not eliminated, the heater needs to be started again. At this time, the control strategy of the cooling pump and the heater can be adjusted in combination with the outlet temperature of the generator.

[0168] For example, if the heating request is not eliminated and the generator outlet temperature is less than or equal to the first threshold, the heater can continue to be started and the cooling pump can be controlled to continue to run at 100% of the current frequency. If the generator outlet temperature is greater than the first threshold, the heater can be controlled to be turned off.

[0169] As the heater is turned off, the temperature of the cooling medium in the cooling circuit gradually decreases, that is, the outlet temperature of the generator will decrease accordingly. If the outlet temperature of the generator is less than the second threshold at this time, the cooling pump can be controlled to continue to operate at 100% frequency. If the outlet temperature of the generator is greater than or equal to the second threshold at this time, it can be further determined whether the heating request of the converter is eliminated at this time. If eliminated, the operating frequency of the cooling pump can be reduced, for example, the cooling pump can be controlled to operate at 50% frequency.

[0170] For example, Figure 8 As shown, after the heater is started, the cooling pump is controlled to run at 50% frequency for 2 minutes (the duration can be adjusted according to actual needs), and then the cooling pump is controlled to run at 100% frequency.

[0171] While the cooling pump is running at 100% frequency, it can be determined whether the heating request of the converter is eliminated. If the heating request of the converter is eliminated, the heater can be turned off and the operating frequency of the cooling pump can be switched from 100% frequency to 50% frequency.

[0172] After the cooling pump runs at 50% frequency for 1 minute (this duration can be adjusted according to actual needs), it can be further determined whether the converter is powered. If the converter is powered, the cooling pump is controlled to continue to run at 50% frequency. If the converter is not powered, the cooling pump can be controlled to stop working after a delay of 3 minutes. It can be determined whether the cooling pump needs to be started again later as needed.

[0173] For example, Figure 8 As shown, during the operation of the cooling pump at 100% frequency, if the heating request of the converter is not eliminated, it can be determined whether the outlet temperature of the generator is greater than 38° C. (a first threshold value, which can be adjusted as needed in actual application).

[0174] If the outlet temperature of the generator is less than or equal to 38°C, the cooling pump can be controlled to continue to operate at 100% frequency. If the outlet temperature of the generator is greater than 38°C, the heater can be turned off, and after the heater is turned off, the outlet temperature of the generator can be further monitored. If the outlet temperature of the generator is less than or equal to 35°C (the second threshold value, which can be adjusted as needed in actual application), the cooling pump can be controlled to continue to operate at 100% frequency. If the outlet temperature of the generator is greater than 35°C and the heating request of the converter is eliminated, the operating frequency of the cooling pump can be switched from 100% frequency to 50% frequency. If the outlet temperature of the generator is greater than 35°C, but the heating request of the converter is not eliminated, the cooling pump can be controlled to continue to operate at 100% frequency.

[0175] In this way, variable frequency control of the cooling pump is realized, which not only meets the heating demand of the converter, but also reduces the energy consumption of the cooling pump and improves the economy by adjusting the operating frequency of the cooling pump.

[0176] For example, during the operation of the cooling pump, if it is detected that the start signal of the cooling pump disappears and / or the wind turbine stops, the converter is not modulated, and the cooling pump can be controlled to delay operation for a period of time, such as 15 minutes before stopping. If high / low pressure crossing and / or an emergency stop command is detected, the cooling pump can be controlled to stop immediately. The emergency stop command can be generated by the emergency stop button of the converter being triggered or the emergency stop button of the master control being triggered.

[0177] Based on the above cooling system, the embodiment of the present application further combines the generator outlet temperature, the gearbox oil pool temperature and other parameters to perform frequency conversion control on the cooling pump, which reduces the energy consumption of the cooling pump while meeting the temperature requirements of each component, and when the cooling medium needs to be heated, the opening of the three-way valve can be gradually adjusted to avoid condensation on the surface of components such as connecting pipes due to a sudden increase in the opening, which affects their lifespan. In addition, the needs of the converter are fully considered, and each component is taken into account to improve the overall performance of the system.

[0178] Based on the same inventive concept, the present application also provides a cooling device for a wind turbine generator set. Fig. 9 The cooling device of the wind turbine generator set provided in the embodiment of the present application is described in detail.

[0179] Fig. 9 A structural diagram of a cooling device for a wind turbine generator set provided in an embodiment of the present application.

[0180] like Fig. 9 As shown, the cooling device of the wind turbine generator set may include:

[0181] An acquisition module 901 is used to acquire a first outlet temperature of the cooling pump station and a temperature difference of a target heat exchange component when the cooling pump station operates at a first frequency, the target heat exchange component being at least one of the N heat exchange components, and the temperature difference being a difference between an outlet temperature and an inlet temperature of the target heat exchange component;

[0182] The control module 902 is used to perform variable frequency control on the cooling pump station according to at least one of the first outlet temperature and the temperature difference.

[0183] The embodiment of the present application can flexibly adjust the operating frequency of the cooling pump based on the outlet temperature of the cooling pump and the temperature difference of the target heat exchange component, thereby realizing variable frequency control of the cooling pump and improving economy while meeting temperature requirements.

[0184] In some embodiments, the control module 902 is specifically configured to:

[0185] In response to the first outlet temperature being greater than or equal to a first threshold, controlling the cooling pump station to operate at a second frequency, the second frequency being greater than the first frequency;

[0186] In response to the first outlet temperature being less than the first threshold and the temperature difference being greater than or equal to the second threshold, controlling the cooling pump station to operate at a second frequency;

[0187] In response to the temperature difference being less than the second threshold and the first outlet temperature being less than a third threshold, the cooling pump station is controlled to operate at a third frequency, the third frequency being less than the first frequency.

[0188] In some embodiments, when the cooling pump station operates at the first frequency, the acquisition module 901 is further used to acquire a temperature parameter of the target object, where the temperature parameter of the target object includes at least one of a temperature of a generator winding, a temperature rise of the winding, an oil pool temperature of a gearbox, a bearing temperature of the gearbox, and an oil temperature of a transformer;

[0189] The control module 902 is further configured to control the cooling pump station to operate at a fourth frequency greater than the first frequency in response to the temperature parameter of the target object satisfying the enhanced cooling condition.

[0190] In some embodiments, the cooling device of the wind turbine generator set may further include:

[0191] A determination module, used for determining whether a heating request of the converter is received in response to the start-up of the wind turbine generator set;

[0192] The control module 902 is further configured to control the cooling pump station to operate at a first frequency in response to not receiving a heating request from the converter;

[0193] The acquisition module 901 is further used to obtain the ambient temperature of the wind turbine generator set at the current moment and the outlet temperature parameters of the generator within a preset time period in response to receiving a heating request from the converter;

[0194] The control module 902 is also used to control the three-way valve to switch to the inner circulation loop, where the inner circulation loop is the cooling loop in the cooling loop except the radiator;

[0195] The control module 902 is also used to control the opening of the three-way valve according to the ambient temperature and the outlet temperature parameters of the generator within a preset time period to adjust the temperature of the cooling medium in the internal circulation loop.

[0196] In some embodiments, the outlet temperature parameter of the generator within the preset time period includes the second outlet temperature of the generator at the current moment and the outlet temperature difference of the generator at the current moment and the moment before the current moment;

[0197] The control module 902 is specifically used for:

[0198] In response to the ambient temperature being lower than the first temperature threshold, the second outlet temperature being higher than the second temperature threshold, and the outlet temperature difference being higher than or equal to the third temperature threshold, controlling the three-way valve to operate at a first opening degree;

[0199] In response to the ambient temperature being greater than or equal to the first temperature threshold and less than the fourth temperature threshold, and the outlet temperature difference being greater than or equal to the fifth temperature threshold, controlling the three-way valve to operate at a second opening degree;

[0200] In response to the ambient temperature being greater than or equal to a fourth temperature threshold, and the outlet temperature difference being greater than or equal to a sixth temperature threshold, controlling the three-way valve to operate at a third opening degree;

[0201] Among them, the first opening, the second opening and the third opening increase in sequence.

[0202] In some embodiments, the control module 902 is also used to control the opening of the three-way valve according to the ambient temperature and the outlet temperature parameters of the generator within a preset time to adjust the temperature of the cooling medium in the internal circulation loop. In response to the heater of the cooling pump station being started and the cooling pump station operating at a fifth frequency, the cooling pump station is frequency-controlled according to whether the heating request is eliminated and at least one of the outlet temperature of the generator, and the fifth frequency is greater than the first frequency.

[0203] In some embodiments, the control module 902 is specifically configured to:

[0204] In response to the heating request being eliminated, controlling the heater to be turned off, and switching the operating frequency of the cooling pump station from the fifth frequency to the first frequency;

[0205] In response to the heating request not being eliminated and the generator outlet temperature being greater than a first threshold, the heater is controlled to be turned off, and in response to the generator outlet temperature being greater than a second threshold and the heating request being eliminated, the operating frequency of the cooling pump station is switched from the fifth frequency to the first frequency.

[0206] The cooling device of the wind turbine generator set provided in the embodiment of the present application can achieve Figure 4-Figure 8 To avoid repetition, the various processes in the cooling method embodiment of the wind turbine generator set are not described again.

[0207] Based on the same inventive concept, the embodiment of the present application also provides an electronic device, which may be, for example, a tablet computer, a notebook computer, a handheld computer, etc. Fig.10 The electronic device provided in the embodiments of the present application is described in detail.

[0208] like Fig.10 As shown, the electronic device may include a processor 1001 and a memory 1002 for storing computer program instructions.

[0209] The processor 1001 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0210] The memory 1002 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1002 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In one example, the memory 1002 may include a removable or non-removable (or fixed) medium, or the memory 1002 is a non-volatile solid-state memory. In one example, the memory 1002 may be a read-only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or a flash memory or a combination of two or more of these.

[0211] The processor 1001 reads and executes the computer program instructions stored in the memory 1002 to implement Figure 4-Figure 8 The method in the embodiment shown in the figure is achieved Figure 4-Figure 8 The corresponding technical effects achieved by executing the method in the illustrated embodiment are not described in detail here for the sake of brevity.

[0212] In one example, the electronic device may further include a communication interface 1003 and a bus 1004. Fig.10 As shown, the processor 1001, the memory 1002, and the communication interface 1003 are connected via a bus 1004 and communicate with each other.

[0213] The communication interface 1003 is mainly used to implement communication between various modules, devices and / or equipment in the embodiments of the present application.

[0214] Bus 1004 includes hardware, software or both, and each component of electronic device is coupled to each other.For example, but not limitation, bus 1004 may include accelerated graphics port (Accelerated Graphics Port, AGP) or other graphics bus, enhanced industry standard architecture (Extended Industry Standard Architecture, EISA) bus, front side bus (Front Side Bus, FSB), hypertransmission (Hyper Transport, HT) interconnection, industry standard architecture (IndustryStandard Architecture, ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 1004 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0215] When the cooling pump station is running at the first frequency, the electronic device can execute the cooling method of the wind turbine generator set in the embodiment of the present application after obtaining the first outlet temperature of the cooling pump station and the temperature difference of the target heat exchange component, thereby realizing the combination of Figure 4-Figure 8 A method for cooling a wind turbine generator system is described Fig. 9 A cooling device for a wind turbine generator system is described.

[0216] In addition, in combination with the cooling method of the wind turbine generator set in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the cooling methods of the wind turbine generator set in the above embodiment is implemented.

[0217] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0218] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), appropriate firmware, plug-in, function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or communication link by a data signal carried in a carrier. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (Radio Frequency, RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0219] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0220] The above reference is according to the method of the present application embodiment, the flow chart of the device (system) and the computer program product and / or the block diagram of the present application embodiment. It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0221] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A cooling system for a wind turbine generator set, characterized in that: The cooling circuit includes a cooling pump station, a cooling medium, a connecting component and a plurality of parallel cooling branches, wherein the connecting component is connected between the cooling pump station and the cooling branches, the cooling pump station drives the cooling medium to circulate in the cooling circuit, and the cooling branches include N series-connected heat exchange components, where N is an integer greater than or equal to 2; Wherein, the outlet of the cooling pump station is connected to the inlet of each cooling branch respectively, and the inlet of the cooling pump station is connected to the outlet of each cooling branch respectively.

2. The cooling system according to claim 1, characterized in that: The cooling order of each of the heat exchange components is determined according to at least one of the thermal properties and working conditions of the heat generation components corresponding to each of the heat exchange components.

3. The cooling system according to claim 1 or 2, characterized in that: The cooling branch comprises at least a first cooling branch and a second cooling branch; The first cooling branch comprises a first cabin heat exchanger, a first generator heat exchanger, a first converter heat exchanger, a first gearbox heat exchanger and a first transformer heat exchanger which are connected in series in sequence; The second cooling branch comprises a second cabin heat exchanger, a second generator heat exchanger, a second converter heat exchanger, a second gearbox heat exchanger and a second transformer heat exchanger which are sequentially connected in series; The outlet of the cooling pump station is connected to the inlet of the first cabin heat exchanger and the inlet of the second cabin heat exchanger respectively, and the inlet of the cooling pump station is connected to the outlet of the first transformer heat exchanger and the outlet of the second transformer heat exchanger respectively.

4. The cooling system according to claim 1, characterized in that: The cooling pump station includes a cooling pump, a three-way valve and a radiator; The inlet of the three-way valve is connected to the outlet of each cooling branch respectively, the first outlet of the three-way valve is connected to the inlet of the radiator, and the outlet of the radiator and the second outlet of the three-way valve are connected to the inlet of the cooling pump respectively.

5. A cooling method for a wind turbine generator set, characterized in that: The cooling system for a wind turbine generator set according to any one of claims 1 to 4, wherein the cooling method comprises: When the cooling pump station operates at a first frequency, obtaining a first outlet temperature of the cooling pump station and a temperature difference of a target heat exchange component, wherein the target heat exchange component is at least one of the N heat exchange components, and the temperature difference is a difference between an outlet temperature and an inlet temperature of the target heat exchange component; The cooling pump station is frequency-controlled according to at least one of the first outlet temperature and the temperature difference.

6. The cooling method according to claim 5, characterized in that: The step of performing frequency conversion control on the cooling pump station according to at least one of the first outlet temperature and the temperature difference comprises: In response to the first outlet temperature being greater than or equal to a first threshold, controlling the cooling pump station to operate at a second frequency, the second frequency being greater than the first frequency; In response to the first outlet temperature being less than a first threshold and the temperature difference being greater than or equal to a second threshold, controlling the cooling pump station to operate at the second frequency; In response to the temperature difference being less than a second threshold and the first outlet temperature being less than a third threshold, the cooling pump station is controlled to operate at a third frequency, the third frequency being less than the first frequency.

7. The cooling method according to claim 5, characterized in that: When the cooling pump station operates at the first frequency, the cooling method further comprises: Acquiring a temperature parameter of a target object, wherein the temperature parameter of the target object includes at least one of a temperature of a generator winding, a temperature rise of the winding, an oil pool temperature of a gearbox, a bearing temperature of the gearbox, and an oil temperature of a transformer; In response to the temperature parameter of the target object satisfying an enhanced cooling condition, the cooling pump station is controlled to operate at a fourth frequency, where the fourth frequency is greater than the first frequency.

8. The cooling method according to claim 5, characterized in that: The cooling method further comprises: In response to the wind turbine generator set being started, determining whether a heating request for the converter is received; In response to not receiving a heating request from the converter, controlling the cooling pump station to operate at the first frequency; In response to receiving a heating request from the converter, obtaining the ambient temperature of the wind turbine generator set at a current moment and an outlet temperature parameter of the generator within a preset time period; Controlling the three-way valve to switch to the inner circulation loop, wherein the inner circulation loop is the cooling loop in the cooling loop except the radiator; The opening of the three-way valve is controlled according to the ambient temperature and the outlet temperature parameter of the generator within a preset time period to adjust the temperature of the cooling medium in the internal circulation loop.

9. The cooling method according to claim 8, characterized in that: The outlet temperature parameter of the generator within the preset time period includes the second outlet temperature of the generator at the current moment and the outlet temperature difference of the generator at the current moment and the moment before the current moment; The step of controlling the opening of the three-way valve according to the ambient temperature and the outlet temperature parameter of the generator within a preset time period to adjust the temperature of the cooling medium in the inner circulation loop comprises: In response to the ambient temperature being lower than a first temperature threshold, the second outlet temperature being higher than a second temperature threshold, and the outlet temperature difference being higher than or equal to a third temperature threshold, controlling the three-way valve to operate at a first opening degree; In response to the ambient temperature being greater than or equal to the first temperature threshold and less than the fourth temperature threshold, and the outlet temperature difference being greater than or equal to the fifth temperature threshold, controlling the three-way valve to operate at a second opening degree; In response to the ambient temperature being greater than or equal to a fourth temperature threshold, and the outlet temperature difference being greater than or equal to a sixth temperature threshold, controlling the three-way valve to operate at a third opening degree; The first opening, the second opening and the third opening increase in sequence.

10. The cooling method according to claim 8, characterized in that: After the opening of the three-way valve is controlled according to the ambient temperature and the outlet temperature parameter of the generator within a preset time to adjust the temperature of the cooling medium in the inner circulation loop, the cooling method further includes: In response to the heater of the cooling pump station being started and the cooling pump station operating at a fifth frequency, the cooling pump station is frequency-controlled according to at least one of whether the heating request is eliminated and an outlet temperature of the generator, the fifth frequency being greater than the first frequency.

11. The cooling method according to claim 10, characterized in that: The step of performing frequency conversion control on the cooling pump station according to at least one of whether the heating request is eliminated and the outlet temperature of the generator comprises: In response to the heating request being eliminated, controlling the heater to be turned off, and switching the operating frequency of the cooling pump station from the fifth frequency to the first frequency; In response to the heating request not being eliminated and the outlet temperature of the generator being greater than a first threshold, the heater is controlled to be turned off, and in response to the outlet temperature of the generator being greater than a second threshold and the heating request being eliminated, the operating frequency of the cooling pump station is switched from the fifth frequency to the first frequency.

12. A cooling device for a wind turbine generator set, characterized in that: The cooling device comprises: an acquisition module, configured to acquire, when the cooling pump station operates at a first frequency, a first outlet temperature of the cooling pump station and a temperature difference of a target heat exchange component, wherein the target heat exchange component is at least one of the N heat exchange components, and the temperature difference is a difference between an outlet temperature and an inlet temperature of the target heat exchange component; A control module is used to perform frequency conversion control on the cooling pump station according to at least one of the first outlet temperature and the temperature difference.

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