Wind power converter IGBT control method, system and device and storage medium

Abstract

The invention discloses a wind power converter IGBT control method, system and device and a storage medium, relates to the technical field of wind power converter control, is applied to a wind power converter IGBT control system, the wind power converter IGBT control system comprises a rotating speed collector and a to-be-controlled IGBT, and comprises the steps of obtaining real-time rotating speed information collected by the rotating speed collector; and when the real-time rotating speed information is matched with the preset synchronous rotating speed information, determining an adjustment IGBT parameter according to the current IGBT adjustment parameter so as to control the to-be-controlled IGBT based on the adjustment IGBT parameter. According to the invention, the IGBT control effect of the wind power converter is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power converter control, and in particular to a wind power converter IGBT control method, system, device and storage medium. Background Art

[0002] With the popularization of wind power generation technology, users have also put forward higher requirements for the control of wind power converter IGBT (Insulated Gate Bipolar Transistor) in wind power generation.

[0003] The traditional wind power converter IGBT control method directly controls the IGBT based on the conventional current, voltage and power. Among them, the conventional control scheme does not consider the synchronous speed problem (the synchronous speed problem can be avoided through various means), and this wind power converter IGBT control method has great defects. Because the external wind force is uncontrollable in wind power generation, there must be a synchronous speed phenomenon, which in turn causes the synchronous speed to affect the use of the IGBT (for example, within the synchronous speed range, the heat generated aggravates the impact on the normal use and service life of the IGBT). That is, this wind power converter IGBT control method will affect the use of the IGBT due to the existence of synchronous speed in wind power generation, which will cause the wind power converter IGBT control effect to be poor.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a wind power converter IGBT control method, system, device and storage medium, aiming to solve the technical problem of poor control effect of wind power converter IGBT.

[0006] To achieve the above-mentioned object, the present application provides a wind power converter IGBT control method, which is applied to a wind power converter IGBT control system, wherein the wind power converter IGBT control system includes a speed collector and an IGBT to be controlled, and the wind power converter IGBT control method includes:

[0007] Acquire the real-time speed information collected by the speed collector;

[0008] When the real-time rotation speed information matches the preset synchronous rotation speed information, the adjusted IGBT parameters are determined according to the current IGBT adjustment parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

[0009] In one embodiment, the current IGBT adjustment parameters include the current switching frequency and the current wave generation mode, and the step of determining the adjustment of the IGBT parameters according to the current IGBT adjustment parameters includes:

[0010] When the current switching frequency matches the preset initial switching frequency, and the current wave-generating mode matches the preset initial wave-generating mode, the preset adjusted switching frequency and the preset adjusted wave-generating mode are used as the adjusted IGBT parameters, wherein the initial switching frequency is greater than the adjusted switching frequency, and the wave-generating frequency of the initial wave-generating mode is less than the wave-generating frequency of the adjusted wave-generating mode;

[0011] When the current switching frequency does not match the preset initial switching frequency, and the current wave transmission mode does not match the preset initial wave transmission mode, the current IGBT adjustment parameter is used as the IGBT adjustment parameter.

[0012] In one embodiment, after the step of determining the adjusted IGBT parameters according to the current IGBT adjustment parameters to control the IGBT to be controlled based on the adjusted IGBT parameters, the method further comprises:

[0013] Obtaining the current speed collected by the speed collector;

[0014] When the current rotation speed is outside the preset synchronous rotation speed range, the initial switching frequency and the initial wave generation mode are used as IGBT parameters for adjustment.

[0015] In one embodiment, after the step of acquiring the real-time rotation speed information collected by the rotation speed collector, the following steps are included:

[0016] When the real-time speed information does not match the preset synchronous speed information, determining the current switching frequency and the current wave generation mode in the current IGBT adjustment parameters;

[0017] When the current switching frequency matches the preset initial switching frequency, and the current wave transmission mode matches the preset initial wave transmission mode, the current IGBT adjustment parameter is used as the IGBT adjustment parameter;

[0018] When the current switching frequency does not match the preset initial switching frequency, and the current wave transmission mode does not match the preset initial wave transmission mode, the preset initial switching frequency and the preset initial wave transmission mode are used as IGBT parameters for adjustment.

[0019] In one embodiment, the real-time rotation speed information includes the current rotation speed, and after the step of acquiring the real-time rotation speed information collected by the rotation speed collector, the following steps are included:

[0020] When the current speed is within a preset synchronous speed range, determining that the real-time speed information matches the preset synchronous speed information;

[0021] When the current rotation speed is outside the preset synchronous rotation speed range, it is determined that the real-time rotation speed information does not match the preset synchronous rotation speed information.

[0022] In one embodiment, the wind power converter IGBT control method further includes:

[0023] Obtaining the number of adjustment times of the current IGBT adjustment parameter within a preset time, and detecting whether the number of adjustment times is greater than a preset adjustment threshold;

[0024] If the number of adjustments is greater than a preset adjustment threshold, the preset synchronous speed range is updated, wherein the range update includes expanding the range interval of the synchronous speed range.

[0025] In one embodiment, the real-time speed information includes the current speed and the most recently collected historical speed. After the step of acquiring the real-time speed information collected by the speed collector, the wind power converter IGBT control method further includes:

[0026] When the historical speed is within a preset synchronous speed range and the current speed is outside the preset synchronous speed range, determining a preset initial switching frequency and a preset initial wave generation mode as adjusting IGBT parameters;

[0027] When the historical speed is outside the preset synchronous speed range and the current speed is within the preset synchronous speed range, a preset adjustment switching frequency and a preset adjustment wave generation mode are determined as adjustment IGBT parameters.

[0028] In addition, to achieve the above-mentioned purpose, the present application also provides a wind power converter IGBT control system, the wind power converter IGBT control system includes a wind power converter, a speed collector and an IGBT to be controlled, the wind power converter is connected to the speed collector and the IGBT to be controlled, and the wind power converter includes:

[0029] An information determination module, used to obtain real-time speed information collected by the speed collector;

[0030] The parameter adjustment module is used to determine the adjusted IGBT parameters according to the current IGBT adjustment parameters when the real-time speed information matches the preset synchronous speed information, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

[0031] In addition, to achieve the above-mentioned objectives, the present application also provides a wind power converter IGBT control device, comprising a processor, a memory, and a wind power converter IGBT control method program stored in the memory and executable by the processor, wherein when the wind power converter IGBT control method program is executed by the processor, the steps of the wind power converter IGBT control method as described above are implemented.

[0032] The present application also provides a storage medium, on which a wind power converter IGBT control method program is stored, wherein when the wind power converter IGBT control method program is executed by a processor, the steps of the wind power converter IGBT control method as described above are implemented.

[0033] The embodiment of the present application provides a wind power converter IGBT control method, which is applied to a wind power converter IGBT control system. The wind power converter IGBT control system includes a speed collector and an IGBT to be controlled. The real-time speed information collected by the speed collector is obtained; when the real-time speed information matches the preset synchronous speed information, the IGBT parameters are adjusted according to the current IGBT adjustment parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters, and whether the real-time speed information collected by the speed collector matches the preset synchronous speed information is determined. When the real-time speed information matches the preset synchronous speed information, the IGBT parameters are adjusted based on the current IGBT adjustment parameters, and finally the IGBT to be controlled is controlled by adjusting the IGBT parameters. Because the IGBT parameters (the current IGBT adjustment parameters, i.e., the IGBT parameters currently being adjusted) will affect the operation of the IGBT, the synchronous speed influence can be improved based on the IGBT parameters, thereby avoiding the phenomenon that the synchronous speed affects the use of the IGBT in wind power generation. This wind power converter IGBT control method not only provides a new wind power converter IGBT control method, but also determines to adjust the IGBT parameters based on the current IGBT adjustment parameters when the real-time speed information matches the preset synchronous speed information, and then controls the IGBT to be controlled, so as to improve the influence of the synchronous speed in wind power generation based on the IGBT parameters, thereby improving the control effect of the wind power converter IGBT. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a flow chart of the first embodiment of the wind power converter IGBT control method of the present application;

[0035] Figure 2 A schematic diagram of a flow chart of a wind power converter IGBT control method of the present application;

[0036] Figure 3This is a flow chart of the second embodiment of the wind power converter IGBT control method of the present application;

[0037] Figure 4 This is a module schematic diagram of the IGBT control system of the wind power converter of this application;

[0038] Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in this application.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0042] In wind power generation technology, because external wind force is an uncontrollable factor, that is, the wind power converter cannot control external factors like thermal discharge or hydropower generation technology to avoid the phenomenon of synchronous speed, the wind power converter will have synchronous speed. Therefore, when the wind power converter operates near the synchronous speed, the rotor side current frequency is low. Since the commutation path of the power module remains unchanged in the same cycle, a single chip will continue to pass current for a long time, causing electrical stress and thermal stress concentration. If the rotor side of the converter works in low-frequency conditions for a long time, it may bring two operating risks: one is that the anti-parallel diode in the IGBT module fails directly due to thermal failure; the other is that the working temperature of the IGBT diode fluctuates greatly, and the aging of the chip and the bonding wire welding layer is accelerated, which greatly affects the life of the IGBT. The current method that can effectively prevent IGBT module failure near the synchronous speed is mainly to automatically limit the power of the wind power converter near the synchronous speed. However, this method is prone to torque and speed fluctuations and has a certain impact on power generation because the wind power converter torque does not follow the main control torque command at this stage (limiting is performed under the premise that the external wind force is uncontrollable, causing fluctuations in the wind power converter torque).

[0043] Therefore, based on the above shortcomings of the IGBT control scheme of the wind power converter, the IGBT control method of the wind power converter of the present application is proposed. The solution of the embodiment of the present application is: by determining whether the real-time speed information collected by the speed collector matches the preset synchronous speed information, when it matches the preset synchronous speed information, the IGBT parameters are determined to be adjusted based on the current IGBT adjustment parameters, and finally the IGBT to be controlled is controlled by adjusting the IGBT parameters, because the IGBT parameters (the current IGBT adjustment parameters, i.e., the IGBT parameters currently adjusted) will affect the operation of the IGBT, so as to improve the synchronous speed influence from the IGBT parameters, thereby avoiding the phenomenon that the synchronous speed affects the use of IGBT in wind power generation. This wind power converter IGBT control method not only provides a new wind power converter IGBT control method, but also determines to adjust the IGBT parameters based on the current IGBT adjustment parameters when the real-time speed information matches the preset synchronous speed information, and then controls the IGBT to be controlled, so as to improve the synchronous speed influence in wind power generation from the IGBT parameters, thereby improving the IGBT control effect of the wind power converter.

[0044] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or a device capable of realizing the above functions, a wind power converter IGBT control device, etc. The following takes the wind power converter IGBT control device as an example to illustrate this embodiment and the following embodiments.

[0045] Based on this, the embodiment of the present application provides a wind power converter IGBT control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the wind power converter IGBT control method of the present application.

[0046] Reference Figure 1 The present application provides a wind power converter IGBT control method, which is applied to a wind power converter IGBT control system. The wind power converter IGBT control system includes a speed collector and an IGBT to be controlled. The wind power converter IGBT control method includes:

[0047] Step S10, obtaining real-time speed information collected by the speed collector;

[0048] In this embodiment, the wind power converter IGBT control system is a system for controlling the operation of IGBTs set inside the wind power discharge instrument. The wind power discharge instrument may also include other hardware, which is not limited here. The wind power converter IGBT control system includes at least a wind power converter, a speed collector (such as an encoder or a corresponding speed sensor, etc.) connected to the wind power converter and used to collect the speed, and an IGBT to be controlled by the wind power converter. At this time, in order to avoid the problem that the wind power converter works at the synchronous speed and causes poor control effect (such as the control at the synchronous speed causes the IGBT to be damaged or the life is affected, etc.), it is necessary to collect real-time speed information through the speed collector, and then determine the synchronous speed based on the real-time speed information, and then perform targeted control on the IGBT to reduce the impact on the IGBT at the synchronous speed, thereby improving the control effect of the wind power converter on the IGBT, that is, suppressing the impact of the synchronous speed on the IGBT.

[0049] In one embodiment, the real-time speed information can be the speed of the motor controlled by the IGBT at the current moment, that is, the speed of the stator rotating magnetic field in the synchronous motor, and then the determination of whether it is in the synchronous speed state is based solely on the speed of the motor controlled by the IGBT at the current moment; it can also be the speed of the motor controlled by the IGBT at the current moment and the speed of the motor controlled by the IGBT at the previous moment of the current moment, that is, through the two speeds, it is determined whether it is entering the synchronous speed state, leaving the synchronous speed state, being in the synchronous speed state, or not in the synchronous speed state, so as to control the IGBT based on the judgment. Among them, the synchronous speed state can be customized according to the actual situation of the user. For example, if the synchronous speed is A, the user can define the synchronous speed state as the synchronous speed state in the interval of As-A+s.

[0050] Step S20, when the real-time speed information matches the preset synchronous speed information, determining the adjusted IGBT parameters according to the current IGBT adjustment parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

[0051] In this embodiment, after the real-time speed information is determined, it is determined whether control is required based on the real-time speed information. That is, when the real-time speed information matches the preset synchronous speed information, in order to avoid the influence of the synchronous speed on the IGBT, the current IGBT adjustment parameters will be adjusted to obtain the adjusted IGBT parameters. Conversely, when the real-time speed information does not match the preset synchronous speed information, the current IGBT adjustment parameters will be directly determined as the adjusted IGBT parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters. Among them, the preset synchronous speed information refers to the information defined by the user to enter the synchronous speed state, such as the speed changes from A to A1, where A1 is the speed in the synchronous speed state, and A is not the speed in the synchronous speed state. The current IGBT adjustment parameters refer to the parameters that control the IGBT at the current moment, such as the switching frequency and wave generation mode of the IGBT, and adjusting the IGBT parameters refers to the parameters of the IGBT after adjustment. Generally, the influence in the synchronous speed state is improved by reducing the switching frequency of the IGBT and increasing the number of wave generation modes. The principle is that reducing the switching frequency of the IGBT can reduce the influence of heat on the IGBT by reducing the switching frequency of the IGBT, and increasing the number of wave generation modes (such as switching from a five-segment wave generation mode to a seven-segment wave generation mode) can avoid the problem of large temperature fluctuations, thereby improving the IGBT control effect of the wind power converter.

[0052] In the present embodiment, a wind power converter IGBT control method is provided, which is applied to a wind power converter IGBT control system. The wind power converter IGBT control system includes a speed collector and an IGBT to be controlled. The real-time speed information collected by the speed collector is obtained; when the real-time speed information matches the preset synchronous speed information, the IGBT parameters are adjusted according to the current IGBT adjustment parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters, and whether the real-time speed information collected by the speed collector matches the preset synchronous speed information is determined. When the real-time speed information matches the preset synchronous speed information, the IGBT parameters are adjusted based on the current IGBT adjustment parameters, and finally the IGBT to be controlled is controlled by adjusting the IGBT parameters. Because the IGBT parameters (the current IGBT adjustment parameters, i.e., the IGBT parameters currently being adjusted) will affect the operation of the IGBT, the synchronous speed influence can be improved based on the IGBT parameters, thereby avoiding the phenomenon that the synchronous speed affects the use of the IGBT in wind power generation. This wind power converter IGBT control method not only provides a new wind power converter IGBT control method, but also determines to adjust the IGBT parameters based on the current IGBT adjustment parameters when the real-time speed information matches the preset synchronous speed information, and then controls the IGBT to be controlled, so as to improve the influence of the synchronous speed in wind power generation based on the IGBT parameters, thereby improving the control effect of the wind power converter IGBT.

[0053] Further, based on the first embodiment of the present application, a second embodiment of the wind power converter IGBT control method of the present application is proposed. In this embodiment, in the above step S20, the current IGBT adjustment parameters include the current switching frequency and the current wave transmission mode. The step of determining the adjustment of the IGBT parameters according to the current IGBT adjustment parameters includes:

[0054] Step S21, when the current switching frequency matches the preset initial switching frequency, and the current wave-generating mode matches the preset initial wave-generating mode, the preset adjusted switching frequency and the preset adjusted wave-generating mode are used as the IGBT parameters for adjustment, wherein the initial switching frequency is greater than the adjusted switching frequency, and the wave-generating frequency of the initial wave-generating mode is less than the wave-generating frequency of the adjusted wave-generating mode;

[0055] Step S22, when the current switching frequency does not match the preset initial switching frequency, and the current wave transmission mode does not match the preset initial wave transmission mode, the current IGBT adjustment parameters are used as the IGBT adjustment parameters.

[0056] In this embodiment, the current IGBT adjustment parameters include the current switching frequency and the current wave-generating mode, that is, the frequency of the wind power converter controlling the switch of the IGBT at the current moment, and the wave-generating mode of the wind power converter controlling the IGBT, such as the five-segment wave-generating mode, the seven-segment wave-generating mode, etc. By determining the relationship between the current switching frequency and the preset initial switching frequency, and the current wave-generating mode and the preset initial wave-generating mode, it is determined whether the current IGBT adjustment parameters need to be adjusted. That is, if it is determined that the synchronous speed state has just been entered at this time, the current IGBT adjustment parameters need to be adjusted, that is, when the current switching frequency matches the preset initial switching frequency, and the current wave mode matches the preset initial wave mode, the preset adjustment switching frequency and the preset adjustment wave mode will be used as the adjustment IGBT parameters, the initial switching frequency is greater than the adjustment switching frequency (the magnitude relationship of the numerical values), and the wave frequency of the initial wave mode is less than the wave frequency of the adjustment wave mode (the magnitude relationship of the wave segment number); on the contrary, when the current switching frequency does not match the preset initial switching frequency, and the current wave mode does not match the preset initial wave mode, the current IGBT adjustment parameters will be directly used as the adjustment IGBT parameters, that is, the current switching frequency and the current wave mode are used to determine whether it is in the synchronous speed state or entering the synchronous speed state. That is to say, the switching frequency and the wave mode at this time are both used in the normal state (all states are divided into the normal state and the synchronous speed state in this embodiment), and then the IGBT parameters in the normal state need to be adjusted to the IGBT parameters in the synchronous speed state to improve the influence of the synchronous speed state on the IGBT. For example, the user can set the preset initial switching frequency to 2K, that is, 2K speed, the preset adjustment switching frequency to 1.5K, the preset initial wave mode to five-segment wave mode, and the preset adjustment wave mode to seven-segment wave mode according to the actual situation. That is, the entire implementation process is: when the wind power converter is running near the synchronous speed (synchronous speed state), on the one hand, the switching frequency is switched. The core principle is to reduce the IGBT switching loss (that is, the switching loss near the synchronous speed accounts for about 40%) by reducing the switching frequency (from the original 2K to 1.5K); on the other hand, the wave mode is switched from five-segment wave to seven-segment wave. The core principle is to use more time periods to spread the heat (such as 30 minutes of continuous heating within 1 hour and 5 minutes of heating within 1 hour, a total of 30 minutes is different, and the latter obviously has the situation of cooling), avoiding the problem of long-term conduction and long-term shutdown of the chip, thereby avoiding the problem of large temperature fluctuations.

[0057] Further, after the step of determining to adjust the IGBT parameters according to the current IGBT adjustment parameters so as to control the IGBT to be controlled based on the adjusted IGBT parameters, the method further comprises:

[0058] Step S23, obtaining the current speed collected by the speed collector;

[0059] Step S24, when the current speed is outside the preset synchronous speed range, the initial switching frequency and the initial wave generation mode are used as IGBT parameters for adjustment.

[0060] In this embodiment, after adjusting the IGBT parameters in the synchronous speed state, the current speed will continue to be collected by the speed collector, and then when it is determined that the current speed is outside the preset synchronous speed range, that is, it is not in the synchronous speed state at this time, it can be restored to the original IGBT parameters, that is, the initial switching frequency and the initial wave mode are used as the adjustment IGBT parameters, and then the controlled IGBT is controlled to avoid the continuous adjustment of the preset switching frequency and the preset adjustment wave. The influence on the entire control process, such as the seven-segment wave mode has high control accuracy requirements. Further, refer to Figure 2 , Figure 2 This is a flow chart of the IGBT control method of the wind power converter of the present application. When it is necessary to detect the synchronous speed state, the generator speed will be detected by the wind power converter to identify whether the generator speed is near the synchronous speed at this time, that is, when it is near the synchronous speed, it can be determined that it is in the synchronous speed state at this time, that is, when the generator speed is detected to fluctuate near the synchronous speed, the IGBT switching frequency and the wave mode will be adjusted, but it should be noted that it is necessary to determine that the switching frequency and the wave mode at this time have not been adjusted, that is, it is entering the synchronous speed state at this time, rather than being in the synchronous speed state. At this time, the IGBT switching frequency and the wave mode after adjustment (reducing the switching frequency and changing the wave mode to a higher number of wave modes) can be controlled to reduce the heating of the IGBT, thereby improving the control effect of the wind power converter on the IGBT. After being in the synchronous speed state, if it is detected that the generator speed is out of the vicinity of the synchronous speed, the IGBT parameters at this time will be adjusted again, that is, the IGBT switching frequency and the wave mode will be adjusted to the IGBT parameters in the normal state to avoid the IGBT parameters that are continuously in the synchronous speed state, thereby improving the IGBT control effect of the wind power converter.

[0061] Further, based on the first embodiment and / or the second embodiment of the present application, a third embodiment of the wind power converter IGBT control method of the present application is proposed. In this embodiment, after the step S10 of acquiring the real-time speed information collected by the speed collector, the method includes:

[0062] Step S101, when the real-time speed information does not match the preset synchronous speed information, determining the current switching frequency and the current wave generation mode in the current IGBT adjustment parameters;

[0063] Step S102, when the current switching frequency matches the preset initial switching frequency, and the current wave transmission mode matches the preset initial wave transmission mode, the current IGBT adjustment parameter is used as the IGBT adjustment parameter;

[0064] Step S103, when the current switching frequency does not match the preset initial switching frequency, and the current wave transmission mode does not match the preset initial wave transmission mode, the preset initial switching frequency and the preset initial wave transmission mode are used as IGBT parameters for adjusting.

[0065] In this embodiment, after obtaining the real-time speed information, if it is found that the real-time speed information does not match the preset synchronous speed information, that is, it is not in the synchronous speed state, then there are two situations at this time, one is entering the normal state from the synchronous speed state, and the other is always in the normal state. Then, by determining the relationship between the current switching frequency and the current wave transmission mode and the preset initial switching frequency and the preset initial wave transmission mode, it is determined which of the above situations is at this time. When the current switching frequency matches the preset initial switching frequency and the current wave transmission mode matches the preset initial wave transmission mode, the current IGBT adjustment parameters are used as the adjusted IGBT parameters, that is, it is always in the normal state at this time, and the current IGBT adjustment parameters can be continued to be used for control; on the contrary, when the current switching frequency does not match the preset initial switching frequency and the current wave transmission mode does not match the preset initial wave transmission mode, the preset initial switching frequency and the preset initial wave transmission mode are used as the adjusted IGBT parameters, that is, it is in the normal state at this time, and it is necessary to adjust the IGBT parameters in the synchronous speed state to the IGBT parameters in the normal state for control. It is worth noting that both the IGBT parameters in the normal state and the IGBT parameters in the synchronous speed state can be a range value and adjusted according to the actual situation. If the IGBT temperature is high at this time, the switching frequency will be appropriately lowered or the switching frequency will be less increased when recovering. The wind power converter controls the IGBT and improves the effect of the wind power converter IGBT control by reducing heat generation (lowering the switching frequency) and dissipating heat evenly (changing the wave generation mode).

[0066] In one embodiment, the real-time rotation speed information includes the current rotation speed, and after the step of acquiring the real-time rotation speed information collected by the rotation speed collector, the following steps are included:

[0067] Step S111, when the current speed is within the preset synchronous speed range, determining that the real-time speed information matches the preset synchronous speed information;

[0068] Step S112: when the current rotation speed is outside the preset synchronous rotation speed range, it is determined that the real-time rotation speed information does not match the preset synchronous rotation speed information.

[0069] In this embodiment, when determining the matching relationship between the real-time speed information and the preset synchronous speed information, it is mainly determined based on the current speed in the real-time speed information, that is, if it is determined that the current speed is within the preset synchronous speed range, it will be determined that the real-time speed information matches the preset synchronous speed information, that is, the generator is in the synchronous speed state at this time. Conversely, if the current speed is outside the preset synchronous speed range, it will be determined that the real-time speed information does not match the preset synchronous speed information, that is, the generator is in a normal state at this time, wherein the current speed refers to the current speed of the generator collected by an encoder or other collection device, so as to determine whether it is in the synchronous speed state for subsequent control.

[0070] Further, based on the first embodiment, the second embodiment and / or the third embodiment of the present application, a fourth embodiment of the wind power converter IGBT control method of the present application is proposed. In this embodiment, the wind power converter IGBT control method further includes:

[0071] Step a, obtaining the number of adjustment times of the current IGBT adjustment parameters within a preset time, and detecting whether the number of adjustment times is greater than a preset adjustment threshold;

[0072] Step b: if the number of adjustments is greater than a preset adjustment threshold, the preset synchronous speed range is updated, wherein the range update includes expanding the range interval of the synchronous speed range.

[0073] In this embodiment, in order to avoid the phenomenon of continuous changes in IGBT parameters, the number of adjustments of the current IGBT adjustment parameters within the preset time is obtained, and then it is detected whether the number of adjustments is greater than the preset adjustment threshold. When the number of adjustments is greater than the preset adjustment threshold, it is determined that the IGBT parameter adjustment is too frequent. The preset synchronous speed range will be updated without affecting the overall control. The preset time refers to a user-defined duration, such as within 1 hour, the number of adjustments refers to the number of times the IGBT parameters are changed, and the preset adjustment threshold refers to a user-defined threshold, such as 5 times. The range update includes expanding the range interval of the synchronous speed range, and the expansion direction can be a single expansion based on one side or expansion on both sides at the same time to avoid the phenomenon of continuous changes.

[0074] Based on the first embodiment, the second embodiment, the third embodiment and / or the fourth embodiment of the present application, a fifth embodiment of the wind power converter IGBT control method of the present application is proposed. In this embodiment, referring to Figure 3 , Figure 3 This is a flow chart of the second embodiment of the wind power converter IGBT control method of the present application. The real-time speed information includes the current speed and the most recently collected historical speed. After the step of obtaining the real-time speed information collected by the speed collector, the wind power converter IGBT control method further includes:

[0075] Step c, when the historical speed is within the preset synchronous speed range and the current speed is outside the preset synchronous speed range, determining a preset initial switching frequency and a preset initial wave generation mode as adjusting IGBT parameters;

[0076] Step d: when the historical speed is outside the preset synchronous speed range and the current speed is within the preset synchronous speed range, determining the preset adjustment switching frequency and the preset adjustment wave generation mode as adjustment IGBT parameters.

[0077] In this embodiment, the real-time speed information includes the current speed and the most recently collected historical speed, that is, at this time, the speed collected this time and the speed collected last time are used to judge whether it is in the synchronous speed state, in the normal state, entering the synchronous speed state or entering the normal state. Then, when the historical speed is within the preset synchronous speed range and the current speed is outside the preset synchronous speed range, it can be determined that it is in the normal state at this time, and then the preset initial switching frequency and the preset initial wave mode can be directly used as the adjustment IGBT parameters, and the controlled IGBT is controlled based on the adjustment IGBT parameters; on the contrary, when the historical speed is outside the preset synchronous speed range and the current speed is within the preset synchronous speed range, it is determined that it is in the synchronous speed state at this time, and then the preset adjustment switching frequency and the preset adjustment wave mode can be directly used as the adjustment IGBT parameters, and then it can be directly judged based on the speed to achieve the effect of improving the IGBT control of the wind power converter by adjusting the IGBT parameters.

[0078] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the wind power converter IGBT control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0079] This application also provides a wind power converter IGBT control system, please refer to Figure 4 The wind power converter IGBT control system includes a wind power converter, a speed collector and an IGBT to be controlled. The wind power converter is connected to the speed collector and the IGBT to be controlled. The wind power converter includes:

[0080] The information determination module A10 is used to obtain the real-time speed information collected by the speed collector;

[0081] The parameter adjustment module A20 is used to determine the adjusted IGBT parameters according to the current IGBT adjustment parameters when the real-time speed information matches the preset synchronous speed information, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

[0082] The wind power converter IGBT control system provided by the present application adopts the wind power converter IGBT control method in the above embodiment, which can solve the technical problem of poor control effect of wind power converter IGBT. Compared with the prior art, the beneficial effects of the wind power converter IGBT control system provided by the present application are the same as the beneficial effects of the wind power converter IGBT control method provided by the above embodiment, and other technical features in the wind power converter IGBT control system are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0083] The present application provides a wind power converter IGBT control device (which can be a wind power device, such as a power-generating wind turbine or a control device of a motor in a power-generating wind turbine), and the wind power converter IGBT control device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the wind power converter IGBT control method in the above-mentioned embodiment one.

[0084] Reference below Figure 5 , which shows a schematic diagram of the structure of a wind power converter IGBT control device suitable for implementing the embodiment of the present application. The wind power converter IGBT control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The wind power converter IGBT control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0085] like Figure 5As shown, the wind power converter IGBT control device may include a processing system 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage system 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the wind power converter IGBT control device are also stored in the RAM 1004. The processing system 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to the I / O interface 1006: an input system 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output system 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage system 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication system 1009. The communication system 1009 may allow the wind power converter IGBT control device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a wind power converter IGBT control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0086] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication system, or installed from a storage system 1003, or installed from a ROM 1002. When the computer program is executed by the processing system 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0087] The wind power converter IGBT control device provided by the present application adopts the wind power converter IGBT control method in the above embodiment, which can solve the technical problem of poor control effect of wind power converter IGBT. Compared with the prior art, the beneficial effects of the wind power converter IGBT control device provided by the present application are the same as the beneficial effects of the wind power converter IGBT control method provided by the above embodiment, and other technical features in the wind power converter IGBT control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0088] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0089] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0090] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the wind power converter IGBT control method in the above-mentioned embodiment.

[0091] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0092] The computer-readable storage medium may be included in the wind power converter IGBT control device; or may exist independently without being assembled into the wind power converter IGBT control device.

[0093] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the wind power converter IGBT control device, the wind power converter IGBT control device:

[0094] Acquire the real-time speed information collected by the speed collector;

[0095] When the real-time rotation speed information matches the preset synchronous rotation speed information, the adjusted IGBT parameters are determined according to the current IGBT adjustment parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

[0096] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0097] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0098] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0099] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned wind power converter IGBT control method, and can solve the technical problem of poor control effect of wind power converter IGBT. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the wind power converter IGBT control method provided in the above-mentioned embodiment, and will not be repeated here.

[0100] The present application also provides a computer program product, including a computer program, wherein when the computer program is executed by a processor, the steps of the wind power converter IGBT control method as described above are implemented.

[0101] The computer program product provided in this application can solve the technical problem of poor control effect of IGBT of wind power converter. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the IGBT control method of wind power converter provided in the above embodiment, which will not be repeated here.

[0102] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A wind power converter IGBT control method, characterized in that: The wind power converter IGBT control method is applied to a wind power converter IGBT control system. The wind power converter IGBT control system includes a speed collector and an IGBT to be controlled. The wind power converter IGBT control method includes: Acquire the real-time speed information collected by the speed collector; When the real-time rotation speed information matches the preset synchronous rotation speed information, the adjusted IGBT parameters are determined according to the current IGBT adjustment parameters, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

2. The wind power converter IGBT control method according to claim 1, characterized in that: The current IGBT adjustment parameters include the current switching frequency and the current wave generation mode. The step of determining the adjustment of the IGBT parameters according to the current IGBT adjustment parameters includes: When the current switching frequency matches the preset initial switching frequency, and the current wave-generating mode matches the preset initial wave-generating mode, the preset adjusted switching frequency and the preset adjusted wave-generating mode are used as the adjusted IGBT parameters, wherein the initial switching frequency is greater than the adjusted switching frequency, and the wave-generating frequency of the initial wave-generating mode is less than the wave-generating frequency of the adjusted wave-generating mode; When the current switching frequency does not match the preset initial switching frequency, and the current wave transmission mode does not match the preset initial wave transmission mode, the current IGBT adjustment parameter is used as the IGBT adjustment parameter.

3. The wind power converter IGBT control method according to claim 2, characterized in that: After the step of determining the adjusted IGBT parameters according to the current IGBT adjustment parameters to control the IGBT to be controlled based on the adjusted IGBT parameters, the method further comprises: Obtaining the current speed collected by the speed collector; When the current rotation speed is outside the preset synchronous rotation speed range, the initial switching frequency and the initial wave generation mode are used as IGBT parameters for adjustment.

4. The wind power converter IGBT control method according to claim 1, characterized in that: After the step of acquiring the real-time speed information collected by the speed collector, the method further comprises: When the real-time speed information does not match the preset synchronous speed information, determining the current switching frequency and the current wave generation mode in the current IGBT adjustment parameters; When the current switching frequency matches the preset initial switching frequency, and the current wave transmission mode matches the preset initial wave transmission mode, the current IGBT adjustment parameter is used as the IGBT adjustment parameter; When the current switching frequency does not match the preset initial switching frequency, and the current wave transmission mode does not match the preset initial wave transmission mode, the preset initial switching frequency and the preset initial wave transmission mode are used as IGBT parameters for adjustment.

5. The wind power converter IGBT control method according to claim 1, characterized in that: The real-time speed information includes the current speed. After the step of acquiring the real-time speed information collected by the speed collector, the method further includes: When the current speed is within a preset synchronous speed range, determining that the real-time speed information matches the preset synchronous speed information; When the current rotation speed is outside the preset synchronous rotation speed range, it is determined that the real-time rotation speed information does not match the preset synchronous rotation speed information.

6. The wind power converter IGBT control method according to any one of claims 1 to 5, characterized in that: The wind power converter IGBT control method further includes: Obtaining the number of adjustment times of the current IGBT adjustment parameter within a preset time, and detecting whether the number of adjustment times is greater than a preset adjustment threshold; If the number of adjustments is greater than a preset adjustment threshold, the preset synchronous speed range is updated, wherein the range update includes expanding the range interval of the synchronous speed range.

7. The wind power converter IGBT control method according to any one of claims 1 to 5, characterized in that: The real-time speed information includes the current speed and the most recently collected historical speed. After the step of acquiring the real-time speed information collected by the speed collector, the wind power converter IGBT control method further includes: When the historical speed is within a preset synchronous speed range and the current speed is outside the preset synchronous speed range, determining a preset initial switching frequency and a preset initial wave generation mode as adjusting IGBT parameters; When the historical speed is outside the preset synchronous speed range and the current speed is within the preset synchronous speed range, a preset adjustment switching frequency and a preset adjustment wave generation mode are determined as adjustment IGBT parameters.

8. A wind power converter IGBT control system, characterized in that: The wind power converter IGBT control system includes a wind power converter, a speed collector and an IGBT to be controlled. The wind power converter is connected to the speed collector and the IGBT to be controlled. The wind power converter includes: An information determination module, used to obtain real-time speed information collected by the speed collector; The parameter adjustment module is used to determine the adjusted IGBT parameters according to the current IGBT adjustment parameters when the real-time speed information matches the preset synchronous speed information, so as to control the IGBT to be controlled based on the adjusted IGBT parameters.

9. A wind power converter IGBT control device, characterized in that: The wind power converter IGBT control device includes a processor, a memory, and a wind power converter IGBT control method program stored in the memory and executable by the processor, wherein when the wind power converter IGBT control method program is executed by the processor, the steps of the wind power converter IGBT control method according to any one of claims 1 to 7 are implemented.

10. A storage medium, characterized in that: The storage medium stores a wind power converter IGBT control method program, wherein when the wind power converter IGBT control method program is executed by a processor, the steps of the wind power converter IGBT control method according to any one of claims 1 to 7 are implemented.

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