A harmonic suppression method and device, electronic equipment and storage medium

Abstract

Embodiments of the present application provide a harmonic suppression method and device, electronic equipment and storage medium. The method comprises: after determining the harmonic parameters of a target harmonic of a system in a current period, comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic; the sub-sample harmonic is a sub-harmonic of a sample harmonic in different periods, and the sample harmonic is a harmonic obtained by simulating different harmonic conditions; based on the comparison result, selecting a sub-sample harmonic matching the target harmonic from the preset sub-sample harmonics; based on the harmonic parameters of the sub-sample harmonic in the next period in the sample harmonic where the matching sub-sample harmonic is located, suppressing the harmonic of the system; the next period is the next period of the period where the matching sub-sample harmonic is located. In this embodiment, the system is actively suppressed in advance when the harmonic parameters have not reached the set value, thereby reducing the harmonic influence on the system and achieving a better harmonic suppression effect.

Description

Technical Field

[0001] This application relates to the field of electrical control technology, and in particular to a harmonic suppression method, apparatus, electronic device, and storage medium. Background Technology

[0002] With the development of power electronics technology, power electronic devices are widely used in the generation, transmission, and distribution of power systems. Because power electronic devices generate harmonics during operation and inject them into the power system, connecting multiple power electronic devices to a power system may lead to risks such as circulating currents and resonance caused by harmonic currents, which could severely damage equipment and cause system collapse.

[0003] In related technologies, when a power system is significantly affected by harmonics, harmonics are filtered out. That is, after the harmonic parameters reach the set value and the harmonic effect has already occurred, the harmonics are filtered out.

[0004] However, the above method is a passive harmonic suppression method, which has a poor effect on harmonic suppression and will also cause a large resonance effect on the system. Summary of the Invention

[0005] This application provides a harmonic suppression method, apparatus, electronic device, and storage medium for actively suppressing harmonics.

[0006] In a first aspect, embodiments of this application provide a harmonic suppression method, the method comprising:

[0007] After determining the harmonic parameters of the target harmonic of the system, the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic; wherein, the target harmonic is the harmonic of the system in the current time period, and the sub-sample harmonic is the sub-harmonic of the sample harmonic in different time periods, and the sample harmonic is the harmonic obtained by simulation of different resonance conditions.

[0008] Based on the comparison results, a sub-sample harmonic that matches the target harmonic is selected from the preset sub-sample harmonics;

[0009] Harmonic suppression is performed on the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics; wherein, the target sample harmonics are the sample harmonics in which the matched sub-sample harmonics are located, and the next time period is the time period following the time period in which the matched sub-sample harmonics are located.

[0010] The above scheme obtains multiple sample harmonics by simulating different resonant operating conditions. The target harmonic of the system in the current time period is compared with the sub-sample harmonics of the above sample harmonics in different time periods to determine the sub-sample harmonics that match the target harmonic. Since harmonics similar in the previous time period have a higher probability of being similar in the next time period, the actual harmonic of the system in the next time period may be similar to the sub-sample harmonic of the matched sub-sample harmonic in the next time period. By using the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonic, active harmonic suppression is performed on the system in advance. Before the harmonic parameters reach the set value, the harmonics are suppressed to reduce the harmonic impact on the system, resulting in a good harmonic suppression effect.

[0011] In some optional implementations, before performing harmonic suppression on the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, the method further includes:

[0012] If the harmonic parameters include frequency and amplitude, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than a first preset frequency, and the amplitude of the sub-sample harmonic in the next time period is determined to be greater than a first preset amplitude; or

[0013] If the harmonic parameters include frequency, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than the first preset frequency; or

[0014] If the harmonic parameters include amplitude, then the amplitude of the subsample harmonic in the next time period is determined to be greater than the first preset amplitude.

[0015] In the above scheme, if the frequency of the sub-sample harmonic in the next time period is greater than the first preset frequency, and / or the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude, it indicates that the frequency and / or amplitude of the sub-sample harmonic in the next time period have reached the standard of affecting the system, and subsequent harmonic suppression steps need to be performed; otherwise, it indicates that the frequency and / or amplitude of the sub-sample harmonic in the next time period have not reached the standard of affecting the system, and subsequent harmonic suppression steps need not be performed.

[0016] In some optional implementations, before comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic, the method further includes:

[0017] If the harmonic parameters include frequency and amplitude, then the frequency of the target harmonic is determined to be greater than a second preset frequency, and the amplitude of the target harmonic is determined to be greater than a second preset amplitude; or

[0018] If the harmonic parameters include frequency, then the frequency of the target harmonic is determined to be greater than the second preset frequency; or

[0019] If the harmonic parameters include amplitude, then the amplitude of the target harmonic is determined to be greater than the second preset amplitude;

[0020] Wherein, the second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

[0021] In the above scheme, since harmonics usually do not change drastically in a short period of time, when the frequency of the target harmonic is greater than the second preset frequency and / or the amplitude of the target harmonic is greater than the second preset amplitude, it indicates that the target harmonic has a certain resonance effect and subsequent comparison steps need to be performed; otherwise, it indicates that the target harmonic has only a small resonance effect, and the resonance effect of the system's harmonics in the next time period is usually not too large, so subsequent comparison steps do not need to be performed.

[0022] In some alternative implementations, harmonic suppression of the system includes:

[0023] Based on the harmonic parameters of the sub-sample harmonics of the next time period, the preset resonance cause and preset resonance state corresponding to the sub-sample harmonics of the next time period, and the current operating parameters of each power electronic device connected to the system, the target operating parameters of each power electronic device are determined.

[0024] Each power electronic device is controlled to operate based on corresponding target operating parameters in order to reduce the harmonics generated by the power electronic device.

[0025] The above scheme accurately determines the target operating parameters of each power electronic device that are suitable for the current system operation and resonance state based on the harmonic parameters of the sub-sample harmonics in the next time period, the corresponding preset resonance causes and preset resonance states, and the current operating parameters of each power electronic device; then controls each power electronic device to operate based on the corresponding target operating parameters, reduces the harmonics generated by the power electronic devices, and performs proactive harmonic suppression on the system in advance.

[0026] In some optional implementations, the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic, including:

[0027] Determine the deviation value of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic;

[0028] Based on the comparison results, sub-sample harmonics matching the target harmonic are selected from preset sub-sample harmonics, including:

[0029] From the preset sub-sample harmonics, the sub-sample harmonic with the smallest deviation value of harmonic parameters is selected as the matching sub-sample harmonic.

[0030] The above scheme determines the subsample harmonics that match the target harmonics by accurately determining the difference between the harmonic parameters of the subsample harmonics and the target harmonics, since the smaller the deviation of the harmonic parameters between the subsample harmonics and the target harmonics.

[0031] Secondly, embodiments of this application also provide a harmonic suppression device, comprising:

[0032] The parameter comparison module is used to compare the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic after determining the harmonic parameters of the target harmonic of the system; wherein, the target harmonic is the harmonic of the system in the current time period, and the sub-sample harmonic is the sub-harmonic of the sample harmonic in different time periods, and the sample harmonic is the harmonic obtained by simulation of different resonance conditions.

[0033] The harmonic selection module is used to select a sub-sample harmonic that matches the target harmonic from a preset sub-sample harmonic based on the comparison results.

[0034] The harmonic suppression module is used to suppress harmonics in the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics; wherein the target sample harmonics are the sample harmonics in which the matched sub-sample harmonics are located, and the next time period is the time period following the time period in which the matched sub-sample harmonics are located.

[0035] In some optional implementations, before performing harmonic suppression on the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, the harmonic suppression module is further configured to:

[0036] If the harmonic parameters include frequency and amplitude, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than a first preset frequency, and the amplitude of the sub-sample harmonic in the next time period is determined to be greater than a first preset amplitude; or

[0037] If the harmonic parameters include frequency, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than the first preset frequency; or

[0038] If the harmonic parameters include amplitude, then the amplitude of the subsample harmonic in the next time period is determined to be greater than the first preset amplitude.

[0039] In some optional implementations, before comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic, the parameter comparison module is further configured to:

[0040] If the harmonic parameters include frequency and amplitude, then the frequency of the target harmonic is determined to be greater than a second preset frequency, and the amplitude of the target harmonic is determined to be greater than a second preset amplitude; or

[0041] If the harmonic parameters include frequency, then the frequency of the target harmonic is determined to be greater than the second preset frequency; or

[0042] If the harmonic parameters include amplitude, then the amplitude of the target harmonic is determined to be greater than the second preset amplitude;

[0043] Wherein, the second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

[0044] In some optional implementations, the harmonic suppression module is specifically used for:

[0045] Based on the harmonic parameters of the sub-sample harmonics of the next time period, the preset resonance cause and preset resonance state corresponding to the sub-sample harmonics of the next time period, and the current operating parameters of each power electronic device connected to the system, the target operating parameters of each power electronic device are determined.

[0046] Each power electronic device is controlled to operate based on corresponding target operating parameters in order to reduce the harmonics generated by the power electronic device.

[0047] In some optional implementations, the parameter comparison module is specifically used for:

[0048] Determine the deviation value of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic;

[0049] The harmonic selection module is specifically used for:

[0050] From the preset sub-sample harmonics, the sub-sample harmonic with the smallest deviation value of harmonic parameters is selected as the matching sub-sample harmonic.

[0051] Thirdly, embodiments of this application provide an electronic device, including at least one processor and at least one memory, wherein the memory stores a computer program, and when the program is executed by the processor, the processor performs any of the harmonic suppression methods described in the first aspect above.

[0052] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform any of the harmonic suppression methods described in the first aspect above.

[0053] Furthermore, the technical effects of any of the implementation methods in aspects two to four can be found in the technical effects of different implementation methods in aspect one, and will not be repeated here. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram illustrating an application scenario provided in the embodiments of this application;

[0056] Figure 2 A schematic flowchart illustrating the first harmonic suppression method provided in this application embodiment;

[0057] Figure 3 A schematic flowchart illustrating the second harmonic suppression method provided in this application embodiment;

[0058] Figure 4 A schematic flowchart illustrating the third harmonic suppression method provided in this application embodiment;

[0059] Figure 5 This is a schematic diagram of the structure of the harmonic suppression device provided in the embodiments of this application;

[0060] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0063] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two devices. Those skilled in the art can understand the specific meaning of the above term in this application based on the specific circumstances.

[0064] Power electronic devices generate harmonics during operation, which are then injected into the power system. The system connects multiple power electronic devices; see [reference needed]. Figure 1 As shown, system 100 connects power electronic device 201, power electronic device 202, and power electronic device 203. Figure 1 Taking three power electronic devices as an example, in practical applications, the system can connect more or fewer power electronic devices. The system may be subject to risks such as circulating current and resonance caused by harmonic currents, which may lead to equipment damage and system collapse in severe cases.

[0065] In some embodiments, harmonics are filtered out when the power system is significantly affected by harmonics (such as system performance degradation or system impedance changes). That is, when harmonics are filtered out, the harmonic parameters have already reached the set values, and the harmonic effect has already occurred. Therefore, the above method is a passive harmonic suppression method, which has a poor harmonic suppression effect and can also cause significant resonance effects on the system.

[0066] In view of this, embodiments of this application propose a harmonic suppression method, apparatus, electronic device, and storage medium. The method includes: after determining the harmonic parameters of a target harmonic of the system, comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic; wherein, the target harmonic is the harmonic of the system in the current time period, and the sub-sample harmonic is the sub-harmonic of the sample harmonic in different time periods, and the sample harmonic is the harmonic obtained by simulating different resonance conditions; based on the comparison results, selecting a sub-sample harmonic that matches the target harmonic from the preset sub-sample harmonics; and suppressing the system for harmonics based on the harmonic parameters of the sub-sample harmonic in the next time period of the target sample harmonic; wherein, the target sample harmonic is the sample harmonic in which the matched sub-sample harmonic is located, and the next time period is the time period after the time period in which the matched sub-sample harmonic is located.

[0067] Multiple sample harmonics are obtained by simulating different resonant operating conditions. The target harmonic of the system in the current time period is compared with the sub-sample harmonics of the above sample harmonics in different time periods to determine the sub-sample harmonics that match the target harmonic. Since harmonics similar in the previous time period have a higher probability of being similar in the next time period, the actual harmonic of the system in the next time period may be similar to the sub-sample harmonic of the matched sub-sample harmonic in the next time period. By using the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonic, active harmonic suppression is performed on the system in advance. Before the harmonic parameters reach the set value, the harmonics are suppressed to reduce the harmonic impact on the system, and the harmonic suppression effect is good.

[0068] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with reference to the accompanying drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0069] This application provides a first harmonic suppression method, such as... Figure 2 As shown, it includes the following steps:

[0070] Step S201: After determining the harmonic parameters of the target harmonic of the system, the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic.

[0071] Wherein, the target harmonic is the harmonic of the system in the current time period, the sub-sample harmonic is the sub-harmonic of the sample harmonic in different time periods, and the sample harmonic is the harmonic obtained by simulation of different resonance conditions.

[0072] In this embodiment, multiple sample harmonics characterizing different resonance conditions are obtained by simulating different resonance conditions.

[0073] The aforementioned sub-sample harmonics are sub-harmonics of the sample harmonics at different time periods. That is, in this embodiment, each sample harmonic is divided into multiple sub-sample harmonics with fixed durations (the fixed duration can be one power frequency cycle) in the time domain.

[0074] The aforementioned target harmonics are the harmonics of this system in the current time period, that is, the harmonics actually collected from the historical time to the current time, wherein the time interval between the current time and the historical time is the aforementioned fixed duration.

[0075] For example, by simulating different resonance conditions, multiple sample harmonics characterizing different resonance conditions are obtained; each sample harmonic is divided into multiple sub-sample harmonics of fixed duration in the time domain; after determining the target harmonic of the system in the current time period, the harmonic parameters of the target harmonic are compared with each sub-sample harmonic one by one.

[0076] Step S202: Based on the comparison results, select a sub-sample harmonic that matches the target harmonic from the preset sub-sample harmonics.

[0077] Since harmonics similar in the previous period are more likely to be similar in the next period, in order to perform active harmonic suppression on the system in advance, this embodiment needs to determine the sub-sample harmonics that match the target harmonics of the system in the current period.

[0078] Based on this, in this embodiment, after comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic, a sub-sample harmonic that matches the target harmonic is selected from the preset sub-sample harmonics based on the comparison results.

[0079] Step S203: Based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, perform harmonic suppression on the system.

[0080] Wherein, the target sample harmonic is the sample harmonic in which the matched sub-sample harmonic is located, and the next time period is the time period following the time period in which the matched sub-sample harmonic is located.

[0081] As mentioned above, harmonics similar in the previous period are more likely to be similar in the next period. The actual harmonics of the system in the next period may be similar to the sub-sample harmonics of the matching sub-sample harmonics in the next period. Therefore, based on the harmonic parameters of the sub-sample harmonics in the next period of the target sample harmonics, the system can be actively suppressed for harmonics in advance through situational awareness.

[0082] The above scheme obtains multiple sample harmonics by simulating different resonant operating conditions. The target harmonic of the system in the current time period is compared with the sub-sample harmonics of the above sample harmonics in different time periods to determine the sub-sample harmonics that match the target harmonic. Since harmonics similar in the previous time period have a higher probability of being similar in the next time period, the actual harmonic of the system in the next time period may be similar to the sub-sample harmonic of the matched sub-sample harmonic in the next time period. By using the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonic, active harmonic suppression is performed on the system in advance. Before the harmonic parameters reach the set value, the harmonics are suppressed to reduce the harmonic impact on the system, resulting in a good harmonic suppression effect.

[0083] In some optional implementations, step S203 above can be implemented in, but is not limited to, the following ways:

[0084] Based on the harmonic parameters of the sub-sample harmonics of the next time period, the preset resonance cause and preset resonance state corresponding to the sub-sample harmonics of the next time period, and the current operating parameters of each power electronic device connected to the system, the target operating parameters of each power electronic device are determined.

[0085] Each power electronic device is controlled to operate based on corresponding target operating parameters in order to reduce the harmonics generated by the power electronic device.

[0086] As mentioned above, the sample harmonics are obtained by simulating different resonance conditions. Therefore, the resonance cause and resonance state (such as whether it is in the early, middle or late stage of resonance) of each sub-sample harmonic can be preset in advance.

[0087] Since the ideal operating state of each power electronic device is different under different resonance causes and resonance states, the target operating parameters of the power electronic devices can be more accurately determined by determining the preset resonance causes and preset resonance states corresponding to the sub-sample harmonics in the next time period. By controlling each power electronic device to operate based on the corresponding target operating parameters, such as sending instructions containing the corresponding target operating parameters to each power electronic device, the operating parameters of each power electronic device can be adjusted, thereby reducing the harmonics generated by the power electronic devices.

[0088] The above scheme accurately determines the target operating parameters of each power electronic device that are suitable for the current system operation and resonance state based on the harmonic parameters of the sub-sample harmonics in the next time period, the corresponding preset resonance causes and preset resonance states, and the current operating parameters of each power electronic device; then controls each power electronic device to operate based on the corresponding target operating parameters, reduces the harmonics generated by the power electronic devices, and performs proactive harmonic suppression on the system in advance.

[0089] In some optional implementations, step S201 above can be implemented in, but is not limited to, the following ways:

[0090] Determine the deviation value of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic;

[0091] Correspondingly, step S202 above can be implemented in, but is not limited to, the following ways:

[0092] From the preset sub-sample harmonics, the sub-sample harmonic with the smallest deviation value of harmonic parameters is selected as the matching sub-sample harmonic.

[0093] Since the smaller the deviation of the harmonic parameters between two harmonics, the more similar the two harmonics are, it is necessary to first determine the deviation of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic, and then take the sub-sample harmonic with the smallest deviation of the harmonic parameters as the matching sub-sample harmonic.

[0094] This embodiment does not limit the specific implementation method for determining the deviation value of harmonic parameters. For example, the least squares method can be used to analyze the deviation between the harmonic parameters of the sub-sample harmonics and the harmonic parameters of the target harmonics to obtain the deviation value of the harmonic parameters.

[0095] The above scheme determines the subsample harmonics that match the target harmonics by accurately determining the difference between the harmonic parameters of the subsample harmonics and the target harmonics, since the smaller the deviation of the harmonic parameters between the subsample harmonics and the target harmonics.

[0096] This application provides a second harmonic suppression method, such as... Figure 3 As shown, it includes the following steps:

[0097] Step S301: After determining the harmonic parameters of the target harmonic of the system, the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic.

[0098] Step S302: Based on the comparison results, select a sub-sample harmonic that matches the target harmonic from the preset sub-sample harmonics.

[0099] The specific implementation of steps S301 to S302 can be referred to the above embodiments, and will not be repeated here.

[0100] Step S303: If the harmonic parameters include frequency and amplitude, then determine that the frequency of the sub-sample harmonic in the next time period is greater than the first preset frequency, and determine that the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude; or if the harmonic parameters include frequency, then determine that the frequency of the sub-sample harmonic in the next time period is greater than the first preset frequency; or if the harmonic parameters include amplitude, then determine that the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude.

[0101] In practice, since the harmonic effect of the subsample harmonics in the next time period is small, there is no need to suppress the harmonics of the system. Therefore, it is necessary to first determine whether there will be a large harmonic effect based on the harmonic parameters of the subsample harmonics in the next time period.

[0102] For example, if the harmonic parameters include parameters in two dimensions: frequency and amplitude, it is necessary to determine whether the frequency of the sub-sample harmonic in the next time period is greater than the first preset frequency, and whether the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude. If the frequency of the sub-sample harmonic in the next time period is greater than the first preset frequency, and the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude, it means that the frequency and amplitude of the sub-sample harmonic in the next time period have reached the standard of affecting the system, and it is necessary to perform subsequent harmonic suppression steps on the system. Conversely, if the frequency of the sub-sample harmonic in the next time period is not greater than the first preset frequency, or the amplitude of the sub-sample harmonic in the next time period is not greater than the first preset amplitude, it means that the frequency or amplitude of the sub-sample harmonic in the next time period has not reached the standard of affecting the system, and it is not necessary to perform subsequent harmonic suppression steps on the system.

[0103] If the harmonic parameters include frequency as a single dimension, it is necessary to determine whether the frequency of the sub-sample harmonics in the next time period is greater than the first preset frequency. If the frequency of the sub-sample harmonics in the next time period is greater than the first preset frequency, it means that the frequency of the sub-sample harmonics in the next time period has reached the standard of affecting the system, and subsequent harmonic suppression steps need to be performed. Conversely, if the frequency of the sub-sample harmonics in the next time period is not greater than the first preset frequency, it means that the frequency of the sub-sample harmonics in the next time period has not reached the standard of affecting the system, and subsequent harmonic suppression steps do not need to be performed.

[0104] If the harmonic parameters include amplitude as a dimension, it is necessary to determine whether the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude. If the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude, it means that the amplitude of the sub-sample harmonic in the next time period has reached the standard of affecting the system, and subsequent harmonic suppression steps need to be performed. Conversely, if the amplitude of the sub-sample harmonic in the next time period is not greater than the first preset amplitude, it means that the amplitude of the sub-sample harmonic in the next time period has not reached the standard of affecting the system, and subsequent harmonic suppression steps do not need to be performed.

[0105] This embodiment does not specifically limit the first preset frequency and the first preset amplitude. For example, the first preset frequency is the frequency that affects the system, and the first preset amplitude is the amplitude that affects the system.

[0106] Step S304: Based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, perform harmonic suppression on the system.

[0107] The specific implementation of step S304 can be found in the above embodiments, and will not be repeated here.

[0108] In the above scheme, if the frequency of the sub-sample harmonic in the next time period is greater than the first preset frequency, and / or the amplitude of the sub-sample harmonic in the next time period is greater than the first preset amplitude, it indicates that the frequency and / or amplitude of the sub-sample harmonic in the next time period have reached the standard of affecting the system, and subsequent harmonic suppression steps need to be performed; otherwise, it indicates that the frequency and / or amplitude of the sub-sample harmonic in the next time period have not reached the standard of affecting the system, and subsequent harmonic suppression steps need not be performed.

[0109] This application provides a third harmonic suppression method, such as... Figure 4 As shown, it includes the following steps:

[0110] Step S401: After determining the harmonic parameters of the target harmonic of the system, if the harmonic parameters include frequency and amplitude, then determine that the frequency of the target harmonic is greater than the second preset frequency and the amplitude of the target harmonic is greater than the second preset amplitude; or if the harmonic parameters include frequency, then determine that the frequency of the target harmonic is greater than the second preset frequency; or if the harmonic parameters include amplitude, then determine that the amplitude of the target harmonic is greater than the second preset amplitude.

[0111] Wherein, the second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

[0112] In practice, harmonics usually do not change drastically in a short period of time. If the resonance effect of the target harmonic in the current period is very small, the resonance effect of the harmonic in the next period is usually not too large. Based on this, it is necessary to first determine whether the target harmonic has only a very small resonance effect.

[0113] For example, if the harmonic parameters include parameters in two dimensions: frequency and amplitude, it is necessary to determine whether the frequency of the target harmonic is greater than the second preset frequency and whether the amplitude of the target harmonic is greater than the second preset amplitude. If the frequency of the target harmonic is greater than the second preset frequency and the amplitude of the target harmonic is greater than the second preset amplitude, it indicates that the target harmonic has a certain resonance effect, and subsequent comparison steps need to be performed. Conversely, if the frequency of the target harmonic is not greater than the second preset frequency or the amplitude of the target harmonic is not greater than the second preset amplitude, it indicates that the target harmonic has only a very small resonance effect, and the resonance effect of the system's harmonics in the next time period is usually not too large, so subsequent comparison steps do not need to be performed.

[0114] If the harmonic parameters include frequency as a single dimension, it is necessary to determine whether the frequency of the target harmonic is greater than the second preset frequency. If the frequency of the target harmonic is greater than the second preset frequency, it indicates that the target harmonic has a certain resonance effect, and subsequent comparison steps need to be performed. Conversely, if the frequency of the target harmonic is not greater than the second preset frequency, it indicates that the target harmonic has only a very small resonance effect, and the resonance effect of the system's harmonics in the next time period is usually not too large, so subsequent comparison steps are not required.

[0115] If the harmonic parameters include amplitude as a dimension, it is necessary to determine whether the amplitude of the target harmonic is greater than the second preset amplitude. If the amplitude of the target harmonic is greater than the second preset amplitude, it indicates that the target harmonic has a certain resonance effect, and subsequent comparison steps need to be performed. Conversely, if the amplitude of the target harmonic is not greater than the second preset amplitude, it indicates that the target harmonic has only a very small resonance effect, and the resonance effect of the system's harmonics in the next time period is usually not too large, so subsequent comparison steps do not need to be performed.

[0116] This embodiment does not specifically limit the second preset frequency and the second preset amplitude. For example, the second preset frequency is the frequency specified by the national standard, and the second preset amplitude is the amplitude specified by the national standard.

[0117] Step S402: Compare the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic.

[0118] Step S403: Based on the comparison results, select a sub-sample harmonic that matches the target harmonic from the preset sub-sample harmonics.

[0119] Step S404: Based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, perform harmonic suppression on the system.

[0120] The specific implementation of steps S402 to S404 can be found in the above embodiments, and will not be repeated here.

[0121] In the above scheme, since harmonics usually do not change drastically in a short period of time, when the frequency of the target harmonic is greater than the second preset frequency and / or the amplitude of the target harmonic is greater than the second preset amplitude, it indicates that the target harmonic has a certain resonance effect and subsequent comparison steps need to be performed; otherwise, it indicates that the target harmonic has only a small resonance effect, and the resonance effect of the system's harmonics in the next time period is usually not too large, so subsequent comparison steps do not need to be performed.

[0122] Based on the same inventive concept, embodiments of this application provide a harmonic suppression device, see reference. Figure 5 As shown, the harmonic suppression device 500 includes:

[0123] The parameter comparison module 501 is used to compare the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic after determining the harmonic parameters of the target harmonic of the system; wherein, the target harmonic is the harmonic of the system in the current time period, and the sub-sample harmonic is the sub-harmonic of the sample harmonic in different time periods, and the sample harmonic is the harmonic obtained by simulation of different resonance conditions.

[0124] The harmonic selection module 502 is used to select a sub-sample harmonic that matches the target harmonic from a preset sub-sample harmonic based on the comparison result.

[0125] The harmonic suppression module 503 is used to suppress harmonics in the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics; wherein, the target sample harmonics are the sample harmonics in which the matched sub-sample harmonics are located, and the next time period is the time period following the time period in which the matched sub-sample harmonics are located.

[0126] In some optional implementations, before performing harmonic suppression on the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, the harmonic suppression module 503 is further configured to:

[0127] If the harmonic parameters include frequency and amplitude, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than a first preset frequency, and the amplitude of the sub-sample harmonic in the next time period is determined to be greater than a first preset amplitude; or

[0128] If the harmonic parameters include frequency, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than the first preset frequency; or

[0129] If the harmonic parameters include amplitude, then the amplitude of the subsample harmonic in the next time period is determined to be greater than the first preset amplitude.

[0130] In some optional implementations, before comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic, the parameter comparison module 501 is further configured to:

[0131] If the harmonic parameters include frequency and amplitude, then the frequency of the target harmonic is determined to be greater than a second preset frequency, and the amplitude of the target harmonic is determined to be greater than a second preset amplitude; or

[0132] If the harmonic parameters include frequency, then the frequency of the target harmonic is determined to be greater than the second preset frequency; or

[0133] If the harmonic parameters include amplitude, then the amplitude of the target harmonic is determined to be greater than the second preset amplitude;

[0134] Wherein, the second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

[0135] In some optional implementations, the harmonic suppression module 503 is specifically used for:

[0136] Based on the harmonic parameters of the sub-sample harmonics of the next time period, the preset resonance cause and preset resonance state corresponding to the sub-sample harmonics of the next time period, and the current operating parameters of each power electronic device connected to the system, the target operating parameters of each power electronic device are determined.

[0137] Each power electronic device is controlled to operate based on corresponding target operating parameters in order to reduce the harmonics generated by the power electronic device.

[0138] In some optional implementations, the parameter comparison module 501 is specifically used for:

[0139] Determine the deviation value of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic;

[0140] The harmonic selection module 502 is specifically used for:

[0141] From the preset sub-sample harmonics, the sub-sample harmonic with the smallest deviation value of harmonic parameters is selected as the matching sub-sample harmonic.

[0142] Since this device is the same as the device in the method of this application embodiment, and the principle of the device in solving the problem is similar to that of the method, the implementation of the device can be referred to the implementation of the method, and the repeated parts will not be described again.

[0143] Based on the same technical concept, this application also provides an electronic device 600, such as... Figure 6 As shown, it includes at least one processor 601 and a memory 602 connected to at least one processor. In this embodiment, the specific connection medium between the processor 601 and the memory 602 is not limited. Figure 6 Taking the connection between processor 601 and memory 602 via bus 603 as an example. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 6 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0144] The processor 601 is the control center of the electronic device, capable of connecting various parts of the device via various interfaces and lines. It performs data processing by running or executing instructions stored in the memory 602 and retrieving data stored in the memory 602. Optionally, the processor 601 may include one or more processing units. The processor 601 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and applications, while the modem processor primarily handles issuing instructions. It is understood that the modem processor may not be integrated into the processor 601. In some embodiments, the processor 601 and the memory 602 may be implemented on the same chip; in other embodiments, they may be implemented on separate chips.

[0145] Processor 601 can be a general-purpose processor, such as a central processing unit (CPU), digital signal processor, application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the harmonic suppression method can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0146] Memory 602, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. Memory 602 may include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card-type memory, random access memory (RAM), static random access memory (SRAM), programmable read-only memory (PROM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic storage, magnetic disk, optical disk, etc. Memory 602 can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer, but is not limited thereto. In the embodiments of this application, memory 602 may also be a circuit or any other device capable of implementing storage functions for storing program instructions and / or data.

[0147] In this embodiment, the memory 602 stores a computer program, which, when executed by the processor 601, causes the processor 601 to perform the following:

[0148] After determining the harmonic parameters of the target harmonic of the system, the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic; wherein, the target harmonic is the harmonic of the system in the current time period, and the sub-sample harmonic is the sub-harmonic of the sample harmonic in different time periods, and the sample harmonic is the harmonic obtained by simulation of different resonance conditions.

[0149] Based on the comparison results, a sub-sample harmonic that matches the target harmonic is selected from the preset sub-sample harmonics;

[0150] Harmonic suppression is performed on the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics; wherein, the target sample harmonics are the sample harmonics in which the matched sub-sample harmonics are located, and the next time period is the time period following the time period in which the matched sub-sample harmonics are located.

[0151] In some alternative implementations, before the processor 601 performs harmonic suppression on the system based on the harmonic parameters of the sub-sample harmonics in the next time period of the target sample harmonics, the processor 601 further performs:

[0152] If the harmonic parameters include frequency and amplitude, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than a first preset frequency, and the amplitude of the sub-sample harmonic in the next time period is determined to be greater than a first preset amplitude; or

[0153] If the harmonic parameters include frequency, then the frequency of the sub-sample harmonic in the next time period is determined to be greater than the first preset frequency; or

[0154] If the harmonic parameters include amplitude, then the amplitude of the subsample harmonic in the next time period is determined to be greater than the first preset amplitude.

[0155] In some optional implementations, before comparing the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic, the processor 601 further performs the following:

[0156] If the harmonic parameters include frequency and amplitude, then the frequency of the target harmonic is determined to be greater than a second preset frequency, and the amplitude of the target harmonic is determined to be greater than a second preset amplitude; or

[0157] If the harmonic parameters include frequency, then the frequency of the target harmonic is determined to be greater than the second preset frequency; or

[0158] If the harmonic parameters include amplitude, then the amplitude of the target harmonic is determined to be greater than the second preset amplitude;

[0159] Wherein, the second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

[0160] In some alternative implementations, processor 601 specifically performs:

[0161] Based on the harmonic parameters of the sub-sample harmonics of the next time period, the preset resonance cause and preset resonance state corresponding to the sub-sample harmonics of the next time period, and the current operating parameters of each power electronic device connected to the system, the target operating parameters of each power electronic device are determined.

[0162] Each power electronic device is controlled to operate based on corresponding target operating parameters in order to reduce the harmonics generated by the power electronic device.

[0163] In some alternative implementations, processor 601 specifically performs:

[0164] Determine the deviation value of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic;

[0165] From the preset sub-sample harmonics, the sub-sample harmonic with the smallest deviation value of harmonic parameters is selected as the matching sub-sample harmonic.

[0166] Since the electronic device is the same as the electronic device in the method of this application embodiment, and the principle of the electronic device in solving the problem is similar to that of the method, the implementation of the electronic device can refer to the implementation of the method, and the repeated parts will not be described again.

[0167] Based on the same technical concept, embodiments of this application also provide a computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of the above-described harmonic suppression method.

[0168] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0169] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0170] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0171] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0172] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0173] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method of harmonic suppression, characterized by, The method comprises: After determining the harmonic parameters of a target harmonic of the system, the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic respectively; wherein, the target harmonic is a harmonic of the system in a current period, the sub-sample harmonic is a sub-harmonic of a sample harmonic in different periods, and the sample harmonic is a harmonic obtained by simulating different resonance conditions; Based on the comparison result, a sub-sample harmonic matching the target harmonic is selected from the preset sub-sample harmonics; Based on the harmonic parameters of the sub-sample harmonic of the next period in the target sample harmonic, the system is subjected to harmonic suppression; wherein, the target sample harmonic is a sample harmonic in which the matching sub-sample harmonic is located, and the next period is a next period of the period in which the matching sub-sample harmonic is located.

2. The method of claim 1, wherein, Before the system is subjected to harmonic suppression based on the harmonic parameters of the sub-sample harmonic of the next period in the target sample harmonic, the following further comprises: If the harmonic parameters include frequency and amplitude, it is determined that the frequency of the sub-sample harmonic of the next period is greater than a first preset frequency, and it is determined that the amplitude of the sub-sample harmonic of the next period is greater than a first preset amplitude; or If the harmonic parameters include frequency, it is determined that the frequency of the sub-sample harmonic of the next period is greater than a first preset frequency; or If the harmonic parameters include amplitude, it is determined that the amplitude of the sub-sample harmonic of the next period is greater than a first preset amplitude.

3. The method of claim 2, wherein, Before the harmonic parameters of the target harmonic are compared with the harmonic parameters of each preset sub-sample harmonic respectively, the following further comprises: If the harmonic parameters include frequency and amplitude, it is determined that the frequency of the target harmonic is greater than a second preset frequency, and it is determined that the amplitude of the target harmonic is greater than a second preset amplitude; or If the harmonic parameters include frequency, it is determined that the frequency of the target harmonic is greater than a second preset frequency; or If the harmonic parameters include amplitude, it is determined that the amplitude of the target harmonic is greater than a second preset amplitude; Wherein, the second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

4. The method of claim 1, wherein, The system is subjected to harmonic suppression, comprising: According to the harmonic parameters of the sub-sample harmonic of the next period, the preset resonance reasons and preset resonance states corresponding to the sub-sample harmonic of the next period, and the current working parameters of each power electronic device connected to the system, target working parameters of each power electronic device are determined; Each power electronic device is controlled to work based on the corresponding target working parameters to reduce the harmonics generated by the power electronic device.

5. The method according to any one of claims 1 to 4, characterized in that The comparison of the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic comprises: The deviation values of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic are determined; Based on the comparison result, a sub-sample harmonic matching the target harmonic is selected from the preset sub-sample harmonics, comprising: From the preset sub-sample harmonics, the sub-sample harmonic with the smallest deviation value of the harmonic parameters is selected as the matching sub-sample harmonic.

6. A harmonic suppression device, characterized by It comprises: The parameter comparison module is configured to compare the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic after determining the harmonic parameters of the target harmonic of the system; the target harmonic is a harmonic of the system in a current period, the sub-sample harmonic is a sub-harmonic of a sample harmonic in different periods, and the sample harmonic is a harmonic obtained by simulating different resonance conditions; The harmonic selection module is configured to select a sub-sample harmonic matching the target harmonic from the preset sub-sample harmonics based on the comparison result; The harmonic suppression module is configured to suppress the harmonic of the system based on the harmonic parameters of the sub-sample harmonic of the next period in the target sample harmonic; the target sample harmonic is a sample harmonic in which the matching sub-sample harmonic is located, and the next period is a next period of the period in which the matching sub-sample harmonic is located.

7. The apparatus of claim 6, wherein, Before the harmonic suppression module suppresses the harmonic of the system based on the harmonic parameters of the sub-sample harmonic of the next period in the target sample harmonic, the harmonic suppression module is further configured to: If the harmonic parameters include frequency and amplitude, determine that the frequency of the sub-sample harmonic of the next period is greater than a first preset frequency, and determine that the amplitude of the sub-sample harmonic of the next period is greater than a first preset amplitude; Or If the harmonic parameters include frequency, determine that the frequency of the sub-sample harmonic of the next period is greater than a first preset frequency; Or If the harmonic parameters include amplitude, determine that the amplitude of the sub-sample harmonic of the next period is greater than a first preset amplitude.

8. The apparatus of claim 7, wherein, Before the parameter comparison module compares the harmonic parameters of the target harmonic with the harmonic parameters of each preset sub-sample harmonic, the parameter comparison module is further configured to: If the harmonic parameters include frequency and amplitude, determine that the frequency of the target harmonic is greater than a second preset frequency, and determine that the amplitude of the target harmonic is greater than a second preset amplitude; Or If the harmonic parameters include frequency, determine that the frequency of the target harmonic is greater than a second preset frequency; Or If the harmonic parameters include amplitude, determine that the amplitude of the target harmonic is greater than a second preset amplitude; The second preset frequency is less than the first preset frequency, and the second preset amplitude is less than the first preset amplitude.

9. The apparatus of claim 6, wherein, The harmonic suppression module is specifically configured to: determine target working parameters of each power electronic device according to the harmonic parameters of the sub-sample harmonic of the next period, a preset resonance cause and a preset resonance state corresponding to the sub-sample harmonic of the next period, and current working parameters of each power electronic device connected to the system; control each power electronic device to work based on the corresponding target working parameter to reduce the harmonic generated by the power electronic device.

10. The apparatus of any one of claims 6-9, wherein, The parameter comparison module is specifically configured to: determine deviation values of the harmonic parameters of each sub-sample harmonic relative to the harmonic parameters of the target harmonic; The harmonic selection module is specifically configured to: select, from the preset sub-sample harmonics, a sub-sample harmonic with the smallest deviation value of the harmonic parameters as the matching sub-sample harmonic.

11. An electronic device, comprising: A computer program product comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the method of any one of claims 1 to 5.

12. A computer-readable storage medium, characterized in that, A computer program product comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the method of any one of claims 1 to 5.

Images