Wind generating set and control method thereof

Abstract

The invention provides a wind generating set and a control method thereof, the wind generating set comprises a converter, at least two variable-frequency power sources and a wind driven generator; the converter is used for outputting low-frequency alternating current for grid connection; and the variable-frequency power supply is used for converting the low-frequency alternating current into power-frequency alternating current used by the wind driven generator. The low-frequency alternating current for grid connection is output through the converter in the wind generating set, the low-frequency alternating current is converted into the power-frequency alternating current used by the wind generating set through the variable-frequency power sources, and the redundant function of self-powered equipment in the wind generating set is achieved by arranging the at least two variable-frequency power sources in the wind generating set. The reliability and the utilization rate of self-powered equipment in the wind generating set are improved, and the service life of the variable-frequency power supply is prolonged.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation technology, and in particular to a wind turbine generator set and its control method. Background Technology

[0002] With the development of offshore wind power, the distance from the shore is getting longer, and the cost of power transmission via AC and DC is very high. At present, although offshore wind turbines have their own power equipment, the existing power equipment lacks redundancy and cooling functions, resulting in low reliability, low utilization rate, and short lifespan of the power equipment. Summary of the Invention

[0003] The technical problem to be solved by this disclosure is to overcome the defects in the prior art where the self-use electrical equipment in wind turbine generator sets lacks redundancy, resulting in low reliability, low utilization rate, and short lifespan of the self-use electrical equipment. This disclosure provides a wind turbine generator set and its control method.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] The first aspect of this disclosure provides a wind turbine generator set, including a converter, a frequency converter, and a wind turbine generator, wherein the number of frequency converters is at least two.

[0006] The converter is used to output low-frequency AC power for grid connection;

[0007] The variable frequency power supply is used to convert the low-frequency AC power into power frequency AC power for the use of the wind turbine generator.

[0008] Preferably, the wind turbine generator set further includes a transformer, and the frequency converter includes multiple redundant frequency converter circuits, each of which includes a switching circuit.

[0009] The multiple redundant frequency converter power supply circuits are connected to the transformer through the switching circuit, and the switching circuit controls one of the multiple redundant frequency converter power supply circuits to be turned on.

[0010] Preferably, the wind turbine generator set further includes a controller, which is connected to the multi-redundant variable frequency power supply circuit;

[0011] The controller is configured to switch to another frequency converter power supply circuit when any of the multiple redundant frequency converter power supply circuits fails during operation; or,

[0012] The controller is used to control the periodic selection of one of the multiple redundant frequency converter power supply circuits.

[0013] Preferably, the controller is configured to keep the wind turbine generator running and switch to another frequency converter power supply circuit when any of the multiple redundant frequency converter power supply circuits experiences a first-state fault during operation; or,

[0014] The controller is used to control the wind turbine generator to shut down and switch to another frequency converter power supply circuit when any of the multiple redundant frequency converter power supply circuits experiences a second-state fault during operation.

[0015] Preferably, the wind turbine generator set further includes a cooling circuit;

[0016] The cooling circuit is used to cool the interior of the wind turbine generator set, and the cooling range at least covers the frequency converter.

[0017] Preferably, the wind turbine generator set further includes a cooling system, which includes an active cooling fan and a passive cooling plate, and the cooling circuit is used to obtain the water temperature and wind speed of the cooling system;

[0018] In response to the water temperature being greater than a first preset temperature or the wind speed being less than a preset wind speed, the active cooling fan is controlled to turn on, and the opening degree of the active cooling fan is controlled to control the water temperature to be less than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;

[0019] Alternatively, in response to the water temperature not being greater than a first preset temperature and the wind speed not being less than a preset wind speed, the passive cooling radiator is controlled to open, so as to control the water temperature to be less than the second preset temperature.

[0020] The second aspect of this disclosure provides a control method for a wind turbine generator set, the control method being applicable to the wind turbine generator set described in the first aspect, the wind turbine generator set including a frequency converter and a cooling system, the cooling system including an active cooling fan and a passive cooling plate, the control method including:

[0021] In response to the detection that the inverter power supply and the cooling system are operating normally, the cooling system is controlled to start.

[0022] Obtain the water temperature and fan speed of the cooling system;

[0023] In response to the water temperature being greater than a first preset temperature or the wind speed being less than a preset wind speed, the active cooling fan is controlled to turn on, and the opening degree of the active cooling fan is controlled to control the water temperature to be less than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;

[0024] Alternatively, in response to the water temperature not being greater than a first preset temperature and the wind speed not being less than a preset wind speed, the passive cooling radiator is controlled to open, so as to control the water temperature to be less than the second preset temperature.

[0025] Preferably, the wind turbine generator set further includes self-consumption electrical equipment, the frequency converter includes multiple redundant frequency converter circuits, and the control method further includes:

[0026] Monitor the operating status and operating time of the multiple redundant frequency converter power supply circuits;

[0027] In response to the detection that any frequency converter power supply circuit is operating normally and the operating time is less than the preset time, the frequency converter power supply circuit is selected to supply power to the self-use equipment.

[0028] Alternatively, in response to the detection of an abnormal operating status or an operating time of not less than a preset duration in any frequency power supply circuit, the faulty frequency power supply circuit is switched to a fault-free frequency power supply circuit so as to supply power to the self-use equipment through the fault-free frequency power supply circuit.

[0029] A third aspect of this disclosure provides an electronic device including a memory, a processor, and a computer program stored in the memory and for running on the processor, wherein the processor executes the computer program to implement the control method for a wind turbine generator described in the second aspect.

[0030] The fourth aspect of this disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method for a wind turbine generator described in the second aspect.

[0031] The fifth aspect of this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements the control method for a wind turbine generator as described in the second aspect.

[0032] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0033] The positive and progressive effects of this disclosure are as follows:

[0034] This disclosure utilizes a converter in a wind turbine generator set to output low-frequency AC power for grid connection, and a frequency converter to convert the low-frequency AC power into power frequency AC power for the wind turbine generator set's own use. By setting at least two frequency converters in the wind turbine generator set, redundancy is achieved for the self-use equipment in the wind turbine generator set, improving the reliability and utilization rate of the self-use equipment and extending the service life of the frequency converters. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set provided in Embodiment 1 of this disclosure;

[0036] Figure 2 This is a schematic diagram of the redundant frequency converter power supply circuit of the wind turbine generator set provided in Embodiment 1 of this disclosure;

[0037] Figure 3 This is a schematic diagram of the cooling system control structure of a wind turbine generator set provided in Embodiment 1 of this disclosure;

[0038] Figure 4 A flowchart of the control method for a wind turbine generator set provided in Embodiment 2 of this disclosure;

[0039] Figure 5 This is a schematic diagram of the electronic device used to implement the control method for a wind turbine generator set according to Embodiment 3 of this disclosure. Detailed Implementation

[0040] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0041] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0042] In this embodiment of the disclosure, the collection, storage, use, processing, transmission, provision, and disclosure of user personal information comply with relevant laws and regulations and do not violate public order and good morals.

[0043] Example 1

[0044] Figure 1 This disclosure provides a wind turbine generator set, which is a large-megawatt low-frequency wind turbine generator set, such as... Figure 1 As shown, the wind turbine generator set includes a converter 1, a frequency converter 2, a wind turbine generator 3, a transformer 4, a switch cabinet 5, an auxiliary transformer 6, a wind turbine 7, and a drive chain 8. The converter 1 includes a grid-side module 11 and a machine-side module 12. The drive chain 8 includes a main shaft 81 and a gearbox 82. The number of frequency converters is at least two.

[0045] Converter 1 is used to output low-frequency AC power for grid connection;

[0046] In this embodiment, the low-frequency AC power is typically 20Hz AC power. The converter, transformer, and switchgear are respectively a low-frequency converter, a low-frequency transformer, and a low-frequency switchgear (e.g., a 20Hz low-frequency converter, a 20Hz low-frequency transformer, and a 20Hz low-frequency switchgear). In specific implementation, while the generator connected to the machine-side module 12 is controlled by the low-frequency converter in the large-megawatt low-frequency wind turbine generator set to generate electricity, 20Hz low-frequency AC power is output from the grid-side module for grid connection.

[0047] Variable frequency power supply 2 is used to convert low-frequency AC power into industrial frequency AC power for the wind turbine generator.

[0048] In this embodiment, the power frequency AC is typically 50Hz AC.

[0049] In a specific example, such as Figure 1 As shown, after capturing wind energy, the wind turbine 7 transmits the wind energy to the wind turbine 3 via the drive chain 8. The wind turbine 3 converts the wind energy into electrical energy and then transmits the electrical energy to the converter 1. The converter 1 outputs 20Hz low-frequency AC power for grid connection. The transformer 4 then converts the 1140V, 20Hz low-voltage, low-frequency electrical energy into 66kV, 20Hz high-voltage, low-frequency electrical energy. The 66kV, 20Hz high-voltage, low-frequency electrical energy is then connected to the power grid 9 via the switch cabinet. Furthermore, the frequency converter 2 converts the 1140V, 20Hz low-voltage, low-frequency electrical energy into 1140V, 50Hz low-voltage power frequency electrical energy. The auxiliary transformer 6 then converts the 1140V, 50Hz low-voltage power frequency electrical energy into 690V / 400V, 50Hz electrical energy to power the self-use electrical equipment 83. It should be noted that the self-use electrical equipment 83 includes, but is not limited to, the yaw system, pitch system, and cooling system.

[0050] It should be noted that, in this embodiment, the wind turbine generator set includes an electrical system and a mechanical system. A low-frequency converter is installed in the electrical system to output low-frequency AC power for grid connection. A transformer and frequency converter are added to the mechanical system in a down-connected manner to coordinate the load of the wind turbine generator set.

[0051] In addition, in this embodiment, a 20Hz low-frequency transformer is used, which requires increasing the weight and volume of the low-frequency transformer to ensure the power conversion efficiency.

[0052] In an optional embodiment, the wind turbine generator set further includes a transformer, and the frequency converter includes multiple redundant frequency converter circuits, each of which includes a switching circuit.

[0053] Multiple redundant frequency converter power supply circuits are connected to the transformer through a switching circuit, and the switching circuit controls one of the multiple redundant frequency converter power supply circuits to be turned on.

[0054] In this embodiment, the switching circuit controls the selective operation of multiple redundant frequency converter power supply circuits, thereby improving the reliability and utilization rate of the self-use electrical equipment in the wind turbine.

[0055] In an optional implementation, the wind turbine generator also includes a controller connected to multiple redundant variable frequency power supply loops.

[0056] The controller is used to switch to another frequency converter circuit when any of the multiple redundant frequency converter circuits fails during operation; or,

[0057] The controller is used to periodically select one of the multiple redundant frequency converter power supply circuits.

[0058] In this embodiment, the controller selects the inverter power supply circuit that has not experienced a fault or periodically selects one of the inverter power supply circuits to ensure normal power supply to the self-use electrical equipment. Furthermore, by adopting a switching method that switches to another inverter power supply circuit after running any inverter power supply circuit for a period of time, the service life of the inverter power supply is extended.

[0059] In an optional implementation, the controller is configured to keep the wind turbine generator running and switch to another frequency converter power supply circuit when a first-state fault occurs in any of the multiple redundant frequency converter power supply circuits during operation; or,

[0060] The controller is used to switch to another frequency converter circuit after the wind turbine generator is shut down when any of the multiple redundant frequency converter power supply circuits experiences a second-state fault during operation.

[0061] In a specific example, for instance, consider a dual-redundant frequency converter power supply circuit, such as... Figure 2As shown, the wind turbine generator set also includes a converter 1, a frequency converter 2, a wind turbine generator 3, a transformer 4, a switch cabinet 5, and an auxiliary transformer 6. The frequency converter 2 includes a frequency converter circuit 21 and a frequency converter circuit 22, and the frequency converter circuit includes a switching circuit S1. After the frequency converter circuits 21 and 22 are connected, they are respectively connected to the converter 1 and the auxiliary transformer 6, and also connected to the transformer 4 through the switching circuit S1. The transformer 4 is connected to the switch cabinet 5, and the wind turbine generator 3 is connected to the converter 1. In the specific implementation process, the frequency converter circuit 21 is monitored by the controller. The system monitors the operating status and duration of the variable frequency power supply circuit 22. For example, if the operating status of the variable frequency power supply circuit 21 is detected to be normal and the duration of operation is less than the preset duration (the preset duration is set according to actual conditions, for example, it can be set to 3 months), then the variable frequency power supply circuit 21 is selected to supply power to the self-use equipment 83; if the operating status of the variable frequency power supply circuit 21 is detected to be abnormal (for example, a cooling or switching problem occurs), or the duration of operation is not less than the preset duration, then the variable frequency power supply circuit 22 is switched to supply power to the self-use equipment 83 through the variable frequency power supply circuit 22.

[0062] Furthermore, when switching the frequency converter power supply circuit, there are two switching methods: (1) When a first-state fault (e.g., a simple fault) is detected in the frequency converter power supply circuit 21, a hot switch is performed on the frequency converter power supply circuit. Specifically, the wind turbine generator set is kept running, and the frequency converter power supply circuit 22 is switched on to ensure that the long-term power supply is not affected. When a second-state fault (e.g., a complex fault) is detected in the frequency converter power supply circuit 21, which affects the operational safety of the wind turbine generator set, a cold switch is performed on the frequency converter power supply circuit. Specifically, the frequency converter power supply circuit 22 is switched on after the wind turbine generator set is shut down.

[0063] In some embodiments, first-state faults include simple faults that do not affect the safe operation of the unit, such as faults in the inverter power supply temperature sensor or high temperature faults in the inverter power supply copper busbar. Second-state faults include complex faults that may affect the safe operation of the unit; therefore, it is best to shut down the unit to ensure its safety before switching to another inverter power supply circuit. Common complex faults include: inverter power supply circuit breaker faults, power module faults, and water cooling system faults.

[0064] It should be noted that when both variable frequency power supply circuit 21 and variable frequency power supply circuit 22 malfunction, a fault message will be output to remind staff to conduct an inspection.

[0065] In this embodiment, by monitoring the operating status and operating time of multiple redundant frequency converter power supply circuits, when any frequency converter power supply circuit fails, another unfaulty frequency converter power supply circuit is automatically switched on, realizing the redundancy function of the self-use equipment in the wind turbine generator set, improving the reliability and utilization rate of the self-use equipment in the wind turbine generator set, and extending the service life of the frequency converter power supply.

[0066] In an alternative embodiment, the wind turbine generator set further includes a cooling circuit;

[0067] The cooling circuit is used to cool the inside of the wind turbine generator set, and the cooling range at least covers the frequency converter.

[0068] In an alternative implementation, such as Figure 3 As shown, the wind turbine generator set includes a frequency converter 2, a transformer 4, an auxiliary transformer 6, a cooling system 31, and a controller 41. The cooling system 31 includes an active cooling fan 311 and a passive cooling plate 312, and a cooling circuit for obtaining the water temperature and wind speed of the cooling system.

[0069] In response to the water temperature being greater than the first preset temperature or the wind speed being less than the preset wind speed, the active cooling fan is turned on and the opening degree of the active cooling fan is controlled to control the water temperature to be less than the second preset temperature, wherein the second preset temperature is greater than the first preset temperature.

[0070] Alternatively, in response to the water temperature not exceeding the first preset temperature and the wind speed not being less than the preset wind speed, the passive cooling radiator is opened to control the water temperature to be lower than the second preset temperature.

[0071] In this embodiment, the variable frequency power supply employs a combination of passive and active cooling methods. During strong winds (i.e., wind speed not less than a preset wind speed), heat is dissipated through passive cooling fins, carrying away most of the heat. During light winds (i.e., wind speed less than a preset wind speed), active cooling fans are used to cool the cooling system, ensuring that the wind turbine generator continues to operate normally even when power generation is not occurring during light winds. Specifically, when the variable frequency power supply and cooling system are detected to be operating normally, the cooling system's water pump is activated. The system operates only when the water temperature exceeds a first preset temperature (e.g., the first preset temperature can be set...). When the temperature is 45℃ or the wind speed is less than the preset wind speed (for example, the preset wind speed can be set to 3m / s), the wind turbine generator needs to activate the active cooling mode. At the same time, the opening of the active cooling fan is intelligently adjusted to ensure continuous cooling of the inverter power supply. Specifically, the active cooling fan is controlled to turn on and the opening of the active cooling fan is controlled to keep the water temperature below the second preset temperature (for example, the second preset temperature can be set to 50℃). Alternatively, when the water temperature of the cooling system is not greater than the first preset temperature and the wind speed is not less than the preset wind speed, the passive cooling fins are controlled to turn on to keep the water temperature below the second preset temperature.

[0072] In this embodiment, the internal components of the wind turbine generator are cooled by a cooling system combined with a cooling circuit, ensuring the safe operation of the wind turbine generator and the normal output of the frequency converter.

[0073] This embodiment outputs low-frequency AC power for grid connection through the converter in the wind turbine generator set, and converts the low-frequency AC power into power frequency AC power for the wind turbine generator set itself through a frequency converter. By setting at least two frequency converters in the wind turbine generator set, the redundancy function of the self-use electrical equipment in the wind turbine generator set is realized, which improves the reliability and utilization rate of the self-use electrical equipment in the wind turbine generator set and extends the service life of the frequency converter.

[0074] Example 2

[0075] Figure 4 This is a flowchart of a control method for a wind turbine generator set provided in Embodiment 2 of this disclosure. This control method is applicable to the wind turbine generator set of Embodiment 1. The wind turbine generator set includes a frequency converter and a cooling system. The cooling system includes an active cooling fan and passive cooling fins, such as... Figure 4 As shown, the control method includes:

[0076] S11. In response to the detection that the inverter power supply and cooling system are operating normally, control the cooling system to start.

[0077] S12. Obtain the water temperature and fan speed of the cooling system;

[0078] S13. In response to the water temperature being greater than the first preset temperature or the wind speed being less than the preset wind speed, control the active cooling fan to turn on and control the opening degree of the active cooling fan to control the water temperature to be less than the second preset temperature, wherein the second preset temperature is greater than the first preset temperature.

[0079] Alternatively, in response to the water temperature not exceeding the first preset temperature and the wind speed not being less than the preset wind speed, the passive cooling radiator is opened to control the water temperature to be lower than the second preset temperature.

[0080] In this embodiment, the variable frequency power supply employs a combination of passive and active cooling methods. During strong winds (i.e., wind speed not less than a preset wind speed), heat is dissipated through passive cooling fins, carrying away most of the heat. During light winds (i.e., wind speed less than a preset wind speed), active cooling fans are used to cool the cooling system, ensuring that the wind turbine generator continues to operate normally even when power generation is not occurring during light winds. Specifically, when the variable frequency power supply and cooling system are detected to be operating normally, the cooling system's water pump is activated. The system operates only when the water temperature exceeds a first preset temperature (e.g., the first preset temperature can be set...). When the temperature is 45℃ or the wind speed is less than the preset wind speed (for example, the preset wind speed can be set to 3m / s), the wind turbine generator needs to activate the active cooling mode. At the same time, the opening of the active cooling fan is intelligently adjusted to ensure continuous cooling of the inverter power supply. Specifically, the active cooling fan is controlled to turn on and the opening of the active cooling fan is controlled to keep the water temperature below the second preset temperature (for example, the second preset temperature can be set to 50℃). Alternatively, when the water temperature of the cooling system is not greater than the first preset temperature and the wind speed is not less than the preset wind speed, the passive cooling fins are controlled to turn on to keep the water temperature below the second preset temperature.

[0081] In this embodiment, the internal components of the wind turbine generator are cooled by a cooling system combined with a cooling circuit, ensuring the safe operation of the wind turbine generator and the normal output of the frequency converter.

[0082] It should be noted that the first preset temperature, the second preset temperature, and the preset wind speed can all be set according to the actual situation. For example, the first preset temperature can be set to 45℃, the second preset temperature can be set to 50℃, and the preset wind speed can be set to 3m / s, or other values. No specific restrictions are made here.

[0083] In an optional embodiment, the wind turbine generator set further includes self-consumption equipment, the frequency converter includes multiple redundant frequency converter circuits, and the control method further includes:

[0084] Monitor the operating status and operating time of multiple redundant frequency converter power supply circuits;

[0085] In response to the detection that any frequency converter power supply circuit is operating normally and the operating time is less than the preset time, the frequency converter power supply circuit is selected to supply power to the self-use equipment.

[0086] Alternatively, in response to the detection of an abnormal operating status or an operating time of not less than a preset duration in any frequency power supply circuit, the faulty frequency power supply circuit is switched to a fault-free frequency power supply circuit so as to supply power to the self-use equipment through the fault-free frequency power supply circuit.

[0087] In a specific example, such as a wind turbine generator set including variable frequency power supply circuit 21 and variable frequency power supply circuit 22, the controller monitors the operating status and operating time of variable frequency power supply circuit 21 and variable frequency power supply circuit 22. For example, if the operating status of variable frequency power supply circuit 21 is detected as normal and the operating time is less than the preset time (the preset time is set according to the actual situation, for example, it can be set to 3 months), then variable frequency power supply circuit 21 is selected to supply power to the self-use equipment; if the operating status of variable frequency power supply circuit 21 is detected as abnormal (for example, a cooling or switching problem occurs), or the operating time is not less than the preset time, then variable frequency power supply circuit 22 is switched to supply power to the self-use equipment.

[0088] Furthermore, when switching the frequency converter power supply circuit, there are two switching methods: (1) When a first-state fault (e.g., a simple fault) is detected in the frequency converter power supply circuit 21, a hot switch is performed on the frequency converter power supply circuit. Specifically, the wind turbine generator set is kept running, and the frequency converter power supply circuit 22 is switched on to ensure that the long-term power supply is not affected. When a second-state fault (e.g., a complex fault) is detected in the frequency converter power supply circuit 21, which affects the operational safety of the wind turbine generator set, a cold switch is performed on the frequency converter power supply circuit. Specifically, the frequency converter power supply circuit 22 is switched on after the wind turbine generator set is shut down.

[0089] In some embodiments, first-state faults include simple faults that do not affect the safe operation of the unit, such as faults in the inverter power supply temperature sensor or high temperature faults in the inverter power supply copper busbar. Second-state faults include complex faults that may affect the safe operation of the unit; therefore, it is best to shut down the unit to ensure its safety before switching to another inverter power supply circuit. Common complex faults include: inverter power supply circuit breaker faults, power module faults, and water cooling system faults.

[0090] It should be noted that when both variable frequency power supply circuit 21 and variable frequency power supply circuit 22 malfunction, a fault message will be output to remind staff to conduct an inspection.

[0091] In this embodiment, by monitoring the operating status and operating time of multiple redundant frequency converter power supply circuits, when any frequency converter power supply circuit fails, another unfaulty frequency converter power supply circuit is automatically switched on, realizing the redundancy function of the self-use equipment in the wind turbine generator set, improving the reliability and utilization rate of the self-use equipment in the wind turbine generator set, and extending the service life of the frequency converter power supply.

[0092] Example 3

[0093] Figure 5 This is a schematic diagram of the structure of an electronic device according to Embodiment 3 of this disclosure. The electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the control method of the wind turbine generator set described in any of the above embodiments. Figure 5 The electronic device 90 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0094] like Figure 5 As shown, the electronic device 90 can be manifested as a general-purpose computing device, such as a server device. The components of the electronic device 90 may include, but are not limited to: at least one processor 91, at least one memory 92, and a bus 93 connecting different system components (including memory 92 and processor 91).

[0095] Bus 93 includes a data bus, an address bus, and a control bus.

[0096] The memory 92 may include volatile memory, such as random access memory (RAM) 921 and / or cache memory 922, and may further include read-only memory (ROM) 923.

[0097] The memory 92 may also include a program tool 925 (or utility) having a set (at least one) program module 924, such program module 924 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0098] The processor 91 executes various functional applications and data processing by running computer programs stored in the memory 92, such as the wind turbine generator control method provided in any of the above embodiments.

[0099] Electronic device 90 can also communicate with one or more external devices 94 (e.g., keyboard, pointing device, etc.). This communication can be performed via input / output (I / O) interface 95. Furthermore, electronic device 90 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 96. Figure 5 As shown, network adapter 96 communicates with other modules of electronic device 90 via bus 93. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with electronic device 90, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0100] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0101] Example 4

[0102] Embodiment 4 of this disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method for wind turbine generators provided in any of the above embodiments.

[0103] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0104] Example 5

[0105] Embodiment 5 of this disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the control method for the wind turbine generator set described in any of the above claims.

[0106] The program code for executing the computer program product of this disclosure can be written in any combination of one or more programming languages, and the program code can be executed entirely on a user device, partially on a user device, as a stand-alone software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0107] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A wind turbine generator system characterized by, The wind turbine generator set comprises a converter, a variable frequency power supply, and a wind generator, wherein the number of the variable frequency power supply is at least two; The converter is configured to output low-frequency AC power for grid connection; The variable frequency power supply is configured to convert the low-frequency AC power into power-frequency AC power for the wind generator.

2. A wind power plant according to claim 1, characterised in that The wind turbine generator set further comprises a transformer, and the variable frequency power supply comprises a plurality of redundant variable frequency power supply circuits, and the variable frequency power supply circuit comprises a switching circuit; The plurality of redundant variable frequency power supply circuits are connected to the transformer through the switching circuit, and the switching circuit controls the plurality of redundant variable frequency power supply circuits to select one to be enabled.

3. A wind power plant according to claim 2, wherein The wind turbine generator set further comprises a controller connected to the plurality of redundant variable frequency power supply circuits; The controller is configured to switch to enable another variable frequency power supply circuit when any variable frequency power supply circuit in the plurality of redundant variable frequency power supply circuits fails in a working state; or The controller is configured to control the plurality of redundant variable frequency power supply circuits to periodically enable one variable frequency power supply circuit.

4. A wind power plant according to claim 3, wherein The controller is configured to keep the wind turbine generator set from stopping and switch to enable another variable frequency power supply circuit when any variable frequency power supply circuit in the plurality of redundant variable frequency power supply circuits fails in a first state in a working state; or The controller is configured to control the wind turbine generator set to stop and then switch to enable another variable frequency power supply circuit when any variable frequency power supply circuit in the plurality of redundant variable frequency power supply circuits fails in a second state in a working state.

5. The wind power plant according to claim 1, wherein The wind turbine generator set further comprises a cooling circuit; The cooling circuit is configured to cool the inside of the wind turbine generator set, and the cooling range covers at least the variable frequency power supply.

6. A wind power plant according to claim 5, wherein The wind turbine generator set further comprises a cooling system comprising an active cooling fan and a passive cooling panel, and the cooling circuit is configured to obtain the water temperature and the wind speed of the cooling system; In response to the water temperature being greater than a first preset temperature or the wind speed being less than a preset wind speed, the active cooling fan is controlled to be turned on, and the opening degree of the active cooling fan is controlled to control the water temperature to be less than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature; Or in response to the water temperature being not greater than the first preset temperature and the wind speed being not less than the preset wind speed, the passive cooling panel is controlled to be turned on to control the water temperature to be less than the second preset temperature.

7. A control method of a wind turbine generator system characterized by, The control method is applicable to the wind turbine generator set of any one of claims 1-6, the wind turbine generator set comprises a variable frequency power supply and a cooling system comprising an active cooling fan and a passive cooling panel, and the control method comprises: In response to monitoring that the operating state of the variable frequency power supply and the cooling system is normal, the cooling system is controlled to be turned on; The water temperature and the wind speed of the cooling system are obtained; In response to the water temperature being greater than a first preset temperature or the wind speed being less than a preset wind speed, the active cooling fan is controlled to be turned on, and the opening degree of the active cooling fan is controlled to control the water temperature to be less than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature; Or in response to the water temperature being not greater than a first preset temperature and the wind speed being not less than a preset wind speed, the passive cooling fins are controlled to be opened to control the water temperature to be less than the second preset temperature.

8. The control method of a wind turbine system according to claim 7, characterized by, The wind turbine further comprises a self-use electric device, the variable frequency power supply comprises multiple redundant variable frequency power supply loops, and the control method further comprises: monitoring the running state and running time of the multiple redundant variable frequency power supply loops; in response to monitoring that the running state of any variable frequency power supply loop is normal and the running time is less than a preset time, the variable frequency power supply loop is selected to supply power to the self-use electric device; or, in response to monitoring that the running state of any variable frequency power supply loop is abnormal or the running time is not less than the preset time, the variable frequency power supply loop with failure is switched to a variable frequency power supply loop without failure to supply power to the self-use electric device through the variable frequency power supply loop without failure.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory for running on the processor, characterized in that, The processor executes the computer program to implement the control method of the wind turbine according to any one of claims 7 to 8.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the control method of the wind turbine according to any one of claims 7 to 8.

11. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the control method of the wind turbine according to any one of claims 7 to 8.

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