A Harmonic Suppression Method, Device, Equipment and Medium Based on Optical Phase Shifting

Abstract

The present application relates to the field of electronic device technology, and in particular to a harmonic suppression method, device, equipment and medium based on optical phase shifting. The method includes: receiving harmonic information sent by the first optical detector; determining phase compensation parameters based on the harmonic information; receiving a phase compensation electrical signal sent by the first optical detector; judging whether the phase compensation electrical signal meets the preset phase compensation requirements; adjusting the phase compensation parameters based on the phase compensation electrical signal, and sending the adjusted phase compensation parameters to the photoelectric modulation phase compensation device until the target phase compensation electrical signal sent by the first optical detector is received, and the signal processing device is controlled to start. The present application can accurately and effectively suppress the harmonics generated by the target power converter by optical phase shifting, solving the problems of parasitic parameters, poor suppression effect, slow response speed, etc. brought about by the electrical phase shifting method in the existing method.

Description

Technical Field

[0001] The present application relates to the technical field of electronic devices, and in particular to a harmonic suppression method, device, equipment and medium based on optical phase shifting. Background Art

[0002] Power converters are widely used in industry, power generation, and transportation. Their application in power systems is a key area. Power converters extract electrical energy from transmission lines, controlling power quality and direction, thereby enabling the flow and transmission of energy within the power grid. Furthermore, converters can convert renewable energy sources such as solar and wind power into direct current (DC), and then further convert this DC into alternating current (AC) to supply power to the grid.

[0003] To achieve electrical energy conversion, power converters incorporate numerous conversion circuits, including AC / DC, DC / AC, voltage conversion, PWM / SPWM / SVPWM, and more. These circuits generate harmonics, which can reduce motor power and even cause equipment to malfunction. Harmonic voltages and currents can increase line losses, leading to higher power transmission costs.

[0004] Most existing harmonic suppression methods use electrical phase shifting, which adjusts the phase by changing the capacitance and inductance values in the circuit or using electrical means such as electronic phase shifters to achieve harmonic suppression. However, electrical phase shifting methods are susceptible to changes in circuit parameters. Factors such as temperature and component aging can lead to reduced phase shift accuracy. Furthermore, electrical components can exhibit parasitic parameters at high frequencies, limiting their performance in high-frequency harmonic suppression. Furthermore, electrical phase shifting methods have a relatively slow response speed, making it difficult to react quickly and effectively to rapidly changing loads and harmonic conditions. Summary of the Invention

[0005] The embodiments of the present application provide a harmonic suppression method, apparatus, device, and medium based on optical phase shifting, which can accurately and effectively suppress various types of harmonics generated by a target power converter through optical phase shifting.

[0006] In one aspect of an embodiment of the present application, a harmonic suppression method based on optical phase shifting is provided, which is applied to an optical phase shifting system. The optical phase shifting system includes an optoelectronic modulation phase compensation device, a first light detector, a signal processing device, and a controller. The optoelectronic modulation phase compensation device, the first light detector, and the signal processing device are connected in sequence and are all connected to the controller. The method is executed by the controller and includes:

[0007] receiving harmonic information sent by the first optical detector, where the harmonic information is obtained by detecting a target power converter by the first optical detector;

[0008] determining a phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information;

[0009] After the electro-optical modulation phase compensation device outputs a phase-compensated optical signal according to the phase compensation parameter, receiving a phase-compensated electrical signal sent by the first photodetector, the phase-compensated electrical signal being obtained by converting the phase-compensated optical signal by the first photodetector;

[0010] Determining whether the phase compensation electrical signal meets a preset phase compensation requirement;

[0011] If the phase compensation electrical signal does not meet the preset phase compensation requirement, adjusting the phase compensation parameter according to the phase compensation electrical signal, and sending the adjusted phase compensation parameter to the photoelectric modulation phase compensation device until a target phase compensation electrical signal sent by the first light detector is received, and the target phase compensation electrical signal meets the preset phase compensation requirement;

[0012] When the target phase compensation electrical signal is received, the signal processing device is controlled to start up so that the target phase compensation electrical signal is input into the signal processing device, so that the signal processing device suppresses the harmonic information generated by the target power converter according to the target phase compensation electrical signal.

[0013] Optionally, the photoelectric modulation phase compensation device includes a laser source, an optical beam splitter, a plurality of photoelectric modulation phase compensation paths connected to the optical beam splitter, and an optical beam combiner connected to the plurality of photoelectric modulation phase compensation paths; the laser source, the optical beam splitter, the photoelectric modulation phase compensation paths, and the optical beam combiner are connected in sequence;

[0014] In which, the optical beam splitter splits the laser beam emitted by the laser source to obtain multiple optical beams, and each of the optical beams is respectively input into each of the photoelectric modulation phase compensation paths. The photoelectric modulation phase compensation path outputs a sub-phase compensation optical signal corresponding to each of the optical beams according to the phase compensation parameters, and each of the sub-phase compensation optical signals corresponds one-to-one to multiple harmonics in the harmonic information; the optical combiner combines each of the sub-phase compensation optical signals to obtain the phase compensation optical signal.

[0015] Optionally, each of the electro-optical modulation phase compensation paths includes an electro-optical modulator, a second optical detector, and a phase delay device connected in sequence, wherein the electro-optical modulator, the second optical detector, and the phase delay device are all connected to the controller; the electro-optical modulator is connected to the optical beam splitter, and the phase delay device is connected to the optical beam combiner; and determining the phase compensation parameters of the electro-optical modulation phase compensation device based on the harmonic information includes:

[0016] Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information;

[0017] Determining the phase difference to be compensated for each harmonic according to the amplitude information, each harmonic corresponding to a single optoelectronic modulation phase compensation path;

[0018] For each electro-optical modulation phase compensation path, determining a voltage parameter applied to the electro-optical modulator according to the phase difference to be compensated, and if the phase offset of the optical beam output by the electro-optical modulator does not meet a preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, determining an optical path adjustment parameter of the phase retarder according to the phase offset;

[0019] Determining the phase compensation parameter according to each of the voltage parameters and each of the optical path adjustment parameters;

[0020] The second light detector is used to detect the phase shift.

[0021] Optionally, the preset phase compensation requirement includes that the phase of each sub-beam for compensating each harmonic reaches a preset phase threshold; the adjusted phase compensation parameter is obtained by the following steps:

[0022] Acquire the phase of each of the sub-beams according to the phase compensation electrical signal, and determine the target sub-beam that does not reach the preset phase threshold according to the phase of each of the sub-beams;

[0023] For each target sub-beam, determining a target voltage parameter to be applied to the electro-optical modulator and a target optical path adjustment parameter of the phase retarder based on a phase error between the phase of the target sub-beam and the preset phase threshold and a type of harmonics corresponding to the target sub-beam;

[0024] The target voltage parameter and the target optical distance adjustment parameter are used as the adjusted phase compensation parameter.

[0025] Optionally, the target voltage parameter is obtained by the following formula:

[0026] ;

[0027] in, is the wavelength of the laser beam, for i The phase error corresponding to the subharmonic is for i The target voltage parameters corresponding to the subharmonics are: n is the refractive index of the electro-optic modulator, reff is the electro-optic coefficient.

[0028] Optionally, the target optical path adjustment parameter is obtained by the following formula:

[0029] ;

[0030] in, for i The target optical path adjustment parameters corresponding to the subharmonics are: is the wavelength of the laser beam, for i The phase error corresponding to the subharmonic is n is the refractive index of the phase retarder.

[0031] Optionally, the i The frequency of the subharmonic is the fundamental frequency. i times.

[0032] According to one aspect of an embodiment of the present application, a harmonic suppression device based on optical phase shifting is provided, which is applied to an optical phase shifting system. The optical phase shifting system includes a photoelectric modulation phase compensation device, a first light detector, a signal processing device, and a controller. The photoelectric modulation phase compensation device, the first light detector, and the signal processing device are connected in sequence and are all connected to the controller. The device includes:

[0033] a first receiving unit, configured to receive harmonic information sent by the first optical detector, wherein the harmonic information is obtained by detecting a target power converter by the first optical detector;

[0034] a determining unit, configured to determine a phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information;

[0035] a second receiving unit, configured to receive a phase-compensated electrical signal sent by the first photodetector after the photoelectric modulation phase compensation device outputs a phase-compensated optical signal according to the phase compensation parameter, the phase-compensated electrical signal being obtained by converting the phase-compensated optical signal by the first photodetector;

[0036] a judging unit, configured to judge whether the phase compensation electrical signal meets a preset phase compensation requirement;

[0037] an adjusting unit, configured to adjust the phase compensation parameter according to the phase compensation electrical signal, and send the adjusted phase compensation parameter to the photoelectric modulation phase compensation device until a target phase compensation electrical signal sent by the first light detector is received, and the target phase compensation electrical signal meets a preset phase compensation requirement;

[0038] A harmonic suppression unit is used to control the signal processing device to start up when receiving the target phase compensation electrical signal, so that the target phase compensation electrical signal is input into the signal processing device, so that the signal processing device suppresses the harmonic information generated by the target power converter according to the target phase compensation electrical signal.

[0039] On the other hand, an embodiment of the present application provides an electronic device, including a processor and a memory;

[0040] The memory is used to store computer programs;

[0041] The processor executes the computer program to implement the aforementioned method.

[0042] On the other hand, an embodiment of the present application provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is executed by a processor to implement the aforementioned method.

[0043] Embodiments of the present application include at least the following beneficial effects: According to the harmonic suppression method, apparatus, device, and medium based on optical phase shifting provided herein, harmonic information generated by a target power converter can be detected by a first optical detector, and phase compensation parameters required by an optoelectronic modulation phase compensation device can be determined based on the harmonic information. After the phase compensation parameters are input to the optoelectronic modulation phase compensation device, the optoelectronic modulation phase compensation device outputs a phase-compensated optical signal based on the phase compensation parameters. The first optical detector detects the phase-compensated optical signal and converts the detected phase-compensated optical signal into a phase-compensated electrical signal.

[0044] By determining whether the phase compensation electrical signal meets the preset phase compensation requirements, if not, the phase compensation parameters are adjusted according to the phase compensation electrical signal until the first optical detector sends a target phase compensation electrical signal that meets the preset phase compensation requirements. At this time, the signal processing device is turned on to input the target phase compensation electrical signal into the signal processing device, so that the signal processing device can suppress the harmonic information generated by the target power converter according to the target phase compensation electrical signal. The present application can accurately and effectively suppress the harmonics generated by the target power converter through optical phase shifting, solving the problems of parasitic parameters, poor suppression effect, slow response speed, etc. caused by the existing electrical phase shifting method. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0046] Figure 1 A logical diagram of the optical phase shifting process provided in an embodiment of the present application;

[0047] Figure 2 A logical diagram of an exemplary optical phase shifting process provided in an embodiment of the present application;

[0048] Figure 3 A schematic flow chart of a harmonic suppression method based on optical phase shifting provided in an embodiment of the present application;

[0049] Figure 4 A block diagram of a harmonic suppression device based on optical phase shifting provided in an embodiment of the present application;

[0050] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0052] It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0053] The terms "at least one", "plurality", "each", "any", etc. used in this application include "at least one", "two" or more, "plurality" or "each", "any" or "any one", "each" or "any one" as used herein.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0055] The method provided in the embodiments of the present application can be applied to a terminal or a server, or can be software running on a terminal or a server. In some embodiments, the terminal can be a smartphone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, and a vehicle-mounted terminal, etc., but is not limited thereto; the server side can be configured as an independent physical server, or as a server cluster or distributed system consisting of multiple physical servers, or as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network; the software can be an application that implements the above method, etc., but is not limited to the above forms.

[0056] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, and the like. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments in which tasks are performed by remote processing devices connected via a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media, including storage devices.

[0057] The following is a detailed introduction to the specific hardware environment of this application. The optical phase shifting system of this application includes an optoelectronic modulation phase compensation device, a first optical detector, a signal processing device and a controller, wherein the optoelectronic modulation phase compensation device includes a laser source, an optical beam splitter, a plurality of optoelectronic modulation phase compensation paths connected to the optical beam splitter, and an optical combiner connected to the plurality of optoelectronic modulation phase compensation paths; the laser source, the optical beam splitter, the optoelectronic modulation phase compensation path and the optical combiner are connected in sequence, and each of the optoelectronic modulation phase compensation paths includes an electro-optical modulator, a second optical detector and a phase delay device connected in sequence; the electro-optical modulator is connected to the optical beam splitter, and the phase delay device is connected to the optical combiner. For details, see Figure 1 As shown, Figure 1 N optoelectronic modulation phase compensation paths are shown in FIG. Figure 1 Each optoelectronic modulation phase compensation channel is used for one type of harmonic ( i subharmonics) suppression, where i is any positive integer greater than or equal to 2. The optical phase shifting system of the present application can split the laser beam (i.e., set up corresponding optoelectronic modulation phase compensation paths) based on the harmonics generated by the target power converter, such as the second harmonic, the third harmonic, the N+1 harmonic, and so on, to perform phase compensation respectively. Finally, after phase compensation, the beams are combined by an optical combiner to obtain an overall phase-compensated optical signal. The optical phase shifting system of the present application can dynamically expand different optoelectronic modulation phase compensation paths based on the different types of harmonics generated, and can adaptively adjust according to the different harmonic information generated by different target power converters.

[0058] For example, see Figure 2 As shown, Figure 2 In the harmonic information of the target power converter, three types of harmonics are generated, namely the 5th harmonic, the 7th harmonic and the 11th harmonic. The 5th harmonic means that the frequency of the harmonic is 5 times the fundamental frequency, the 7th harmonic means that the frequency of the harmonic is 7 times the fundamental frequency, and the 11th harmonic means that the frequency of the harmonic is 11 times the fundamental frequency. The fundamental frequency is the rated frequency of the power grid in the power system (grid system).

[0059] The following is a detailed explanation of the working principles of each component:

[0060] Laser source: The energy source, also known as the laser beam emission source, is used to emit a laser beam of a specific wavelength and intensity, providing a stable optical signal for subsequent optical phase shifting operations. Laser sources can be semiconductor lasers, which have the advantages of small size, high efficiency, and easy modulation. The laser source emits a stable laser beam, which enters the optical beam splitter. The optical beam splitter splits the laser beam into several sub-beams according to the settings, for example, into N sub-beams, each of which can be independently optically phase-shifted. For example, the 5th and 7th harmonics require different phase delays to achieve cancellation. By dividing the laser into multiple sub-beams through an optical beam splitter, these sub-beams can be differently phase-modulated and delayed, so that after re-synthesis, they can produce a phase opposite to that of a specific harmonic frequency (such as the 5th, 7th, and 11th harmonics), thereby achieving targeted suppression of different harmonics.

[0061] Electro-optic modulator: A key component for achieving optical phase shifting. It utilizes the electro-optic effect. When an electric field is applied to certain crystals, their refractive index changes, thereby altering the phase of light passing through the crystal. By feeding an input laser beam (laser signal) into the electro-optic modulator and applying an appropriate voltage signal, the phase of light can be precisely controlled.

[0062] Beam splitters are used based on various principles, such as leveraging the reflective and transmissive properties of dielectric films, to split a single laser beam into multiple sub-beams in a predetermined ratio. These splitters can be selected based on specific design requirements. Each sub-beam undergoes different optical paths and processing to achieve phase control.

[0063] Phase retarder: used to further adjust the phase of the split optical signal (i.e., the sub-beam described in this application). The phase retarder can achieve phase delay by changing the physical length of the light propagating through it, or by utilizing the optical properties of special materials. For example, a wave plate made of birefringent materials such as quartz can produce a specific phase difference in light with different polarization directions by selecting the appropriate thickness and optical axis direction. Among them, the phase retarder mainly plays the role of accurately adjusting the phase of the optical signal. The phase of the sub-beam modulated by the electro-optical modulator has undergone a preliminary change, but may not yet meet the final precise harmonic suppression requirements. The phase retarder can further perform fine phase adjustment on these sub-beams.

[0064] First photodetector and second photodetector: The first photodetector is used to detect the phase-compensated optical signal after optical phase shifting, and the second photodetector is used to detect whether the phase of the sub-beam modulated by the electro-optical modulator in the photoelectric modulation phase compensation path in which it is located meets the preset phase requirement (the preset phase compensation requirement in the embodiment of the present application can be set to 180°). The first photodetector converts the optical signal into an electrical signal for subsequent interaction with the circuit of the signal processing device of the target power converter. Common photodetectors include photodiodes, which have the characteristics of fast response speed and high sensitivity. Based on the photovoltaic effect, when light shines on its PN junction, the photodiode generates a current signal proportional to the light intensity.

[0065] Controller: The controller can be a microprocessor or digital signal processor (DSP)-based circuit that receives electrical signals from the first and second photodetectors, analyzes and processes the electrical signals according to a preset algorithm and preset phase compensation requirements, compares the signals with the phase of the preset phase compensation requirements, and generates a control signal. If the detected signal indicates that the harmonic suppression effect does not meet the expectations, the controller will adjust the voltage applied to the electro-optical modulator and other relevant parameters to readjust the optical phase shifting process. Through continuous feedback and adjustment, the power converter harmonics are continuously and effectively suppressed, ensuring that the power quality output by the target power converter meets relevant standards and requirements, thereby ensuring that the optical phase shifting process can accurately suppress the harmonics generated by the target power converter.

[0066] like Figure 3 As shown, in an embodiment of the present application, a harmonic suppression method based on optical phase shifting is provided. The harmonic suppression method based on optical phase shifting is applied to the above-mentioned optical phase shifting system, and the method is executed in the controller of the above-mentioned optical phase shifting system. Figure 3 As shown, the harmonic suppression method based on optical phase shifting provided in the embodiment of the present application specifically includes but is not limited to steps S1 to S6:

[0067] In step S1 , harmonic information sent by the first optical detector is received, where the harmonic information is obtained by the first optical detector detecting a target power converter.

[0068] Specifically, the first optical detector is used not only to detect the phase-compensated optical signal after optical phase shifting, but also to detect harmonic information generated by the target power converter. The first optical detector is used to detect the phase-compensated optical signal after optical phase shifting, and send the phase-compensated optical signal in the form of an electrical signal to the signal processing device, so that the signal processing device performs signal processing and output coupling;

[0069] Alternatively, the first optical detector is used to detect harmonic information generated by the target power converter and send the harmonic information to the controller in the form of an electrical signal, so that the controller analyzes and processes the electrical signal according to a preset algorithm and preset phase compensation requirements to generate a corresponding control signal.

[0070] In step S2, a phase compensation parameter of the optoelectronic modulation phase compensation device is determined according to the harmonic information.

[0071] Specifically, see Figure 1 and Figure 2 As shown, the phase compensation parameter can be expressed as a whole as follows: how many different types of harmonics are included in the harmonic information, then the same number of optoelectronic modulation phase compensation paths are set to suppress them separately, and finally the overall phase compensation optical signal is obtained by combining the beams through the optical combiner, which can effectively suppress the harmonic information.

[0072] In one embodiment of the present application, each of the electro-optical modulation phase compensation paths includes an electro-optical modulator, a second optical detector, and a phase delay device connected in sequence, wherein the electro-optical modulator, the second optical detector, and the phase delay device are all connected to the controller; the electro-optical modulator is connected to the optical beam splitter, and the phase delay device is connected to the optical beam combiner; and determining the phase compensation parameters of the electro-optical modulation phase compensation device based on the harmonic information includes:

[0073] Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information;

[0074] Determining the phase difference to be compensated for each harmonic according to the amplitude information, each harmonic corresponding to a single optoelectronic modulation phase compensation path;

[0075] For each electro-optical modulation phase compensation path, determining a voltage parameter applied to the electro-optical modulator according to the phase difference to be compensated, and if the phase offset of the optical beam output by the electro-optical modulator does not meet a preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, determining an optical path adjustment parameter of the phase retarder according to the phase offset;

[0076] Determining the phase compensation parameter according to each of the voltage parameters and each of the optical path adjustment parameters;

[0077] The second light detector is used to detect the phase shift.

[0078] Specifically, the phase offset is the phase difference between the current sub-beam phase and the preset phase compensation requirement (180°). The phase difference to be compensated for each harmonic is determined using amplitude information. For example, based on grid access standards and application requirements, the controller sets the target amplitude for 5th harmonic suppression to 0.05A1, the target amplitude for 7th harmonic suppression to 0.03A1, and the target amplitude for 11th harmonic suppression to 0.02A1, where A1 is the fundamental amplitude. The target amplitudes for multiple harmonic suppression are used to determine whether grid access standards and application requirements are met. If the target amplitude does not meet the standard, the corresponding phase difference is detected based on the amplitude and the compensation parameters are readjusted.

[0079] The electrical signal output by the second photodetector is transmitted to the controller, which readjusts the amplitude based on the actual amplitude and the target amplitude. For example, the amplitude of the 5th harmonic currently detected is 0.06A1, the phase is 175°, the amplitude error is 0.06A1-0.05A1=0.01A1, and the phase error is 175°-180°=-5° (converted to radians is -π / 36). The controller uses the formula for the relationship between the phase offset and the applied voltage of the electro-optic modulator , calculate the target voltage parameters, and use them to readjust the electro-optical modulator voltage. At the same time, the optical path adjustment parameters of the phase retarder may be adjusted (for example, the optical path adjustment amount is recalculated based on the new phase error). The above process is then repeated until the fifth harmonic meets the suppression target (i.e., the phase of the target sub-beam reaches 180°). Similarly, the seventh and eleventh harmonics are continuously monitored and adjusted, ultimately ensuring that the power quality output by the target power converter meets the standards.

[0080] In step S3, after the optoelectronic modulation phase compensation device outputs the phase compensation optical signal according to the phase compensation parameter, it receives the phase compensation electrical signal sent by the first photodetector, where the phase compensation electrical signal is obtained by converting the phase compensation optical signal by the first photodetector.

[0081] Specifically, the first optical detector converts the phase-compensated optical signal output by the photoelectric modulation phase compensation device according to the phase compensation parameters into a phase-compensated electrical signal and sends it to the controller. At this time, the controller can analyze and process the phase-compensated electrical signal to determine whether the current phase-compensated electrical signal meets the preset phase compensation requirement, where the preset phase compensation requirement means that the phase of each sub-beam in each photoelectric modulation phase compensation path corresponding to each harmonic generated by the target power converter reaches 180°.

[0082] Although the phase requirements are the same, the frequencies of different harmonics (5th, 7th, and 11th) are different. The electro-optic modulator corresponding to the high-frequency harmonic requires a larger voltage change rate to achieve a faster refractive index change, so the required applied voltage is different. It is known that the harmonic frequency of the 7th harmonic has a certain proportional relationship with the harmonic frequency of the 5th harmonic, which is approximately ≈2.744; similarly, the proportional relationship between the harmonic frequency of the 11th harmonic and the harmonic frequency of the 5th harmonic is approximately ≈10.648. Similarly, the proportional relationship between the harmonic frequencies of other harmonics and the phase offset of the 5th harmonic is approximately Where N is the harmonic order. Therefore, by simply calculating the voltage parameters required for the 5th harmonic, the voltage parameters required for other harmonics can be calculated accordingly. The voltage parameters or target voltage parameters of the 5th harmonic can be obtained using the following formula:

[0083] .

[0084] So, i =5, the voltage parameters of the 5th harmonic or the target voltage parameters can be obtained , for example, the incident wavelength of the laser beam is In this embodiment, a lithium niobate (LiNbO3) electro-optic modulator is used as an example. It is known that the refractive index of the lithium niobate electro-optic modulator is n =2.2, effective electro-optic coefficient , the current 5th harmonic phase is 0°, so the required phase offset is 0°-180°=-180°, that is - π ,therefore , from which we can get:

[0085]

[0086] Similarly, the voltage parameters required for the 7th harmonic and the 11th harmonic can be calculated. The voltage parameter required for the 7th harmonic is:

[0087] The voltage parameters required for the 11th harmonic are:

[0088] In step S4, it is determined whether the phase compensation electrical signal meets a preset phase compensation requirement.

[0089] In one embodiment of the present application, the preset phase compensation requirement includes that the phase of each sub-beam for compensating each harmonic reaches a preset phase threshold; the adjusted phase compensation parameter is obtained by the following steps:

[0090] Acquire the phase of each of the sub-beams according to the phase compensation electrical signal, and determine the target sub-beam that does not reach the preset phase threshold according to the phase of each of the sub-beams;

[0091] For each target sub-beam, determining a target voltage parameter to be applied to the electro-optical modulator and a target optical path adjustment parameter of the phase retarder based on a phase error between the phase of the target sub-beam and the preset phase threshold and a type of harmonics corresponding to the target sub-beam;

[0092] The target voltage parameter and the target optical distance adjustment parameter are used as the adjusted phase compensation parameter.

[0093] Specifically, the phase compensation electrical signal determines whether the phase of each sub-beam meets the 180° phase compensation requirement. If the phase of any sub-beam does not meet the requirement, optical phase shift adjustment must be performed again. The target sub-beam refers to the sub-beam whose phase offset or phase does not meet the corresponding requirement.

[0094] In step S5, if the phase compensation electrical signal does not meet the preset phase compensation requirement, the phase compensation parameter is adjusted according to the phase compensation electrical signal, and the adjusted phase compensation parameter is sent to the photoelectric modulation phase compensation device until the target phase compensation electrical signal sent by the first light detector is received, and the target phase compensation electrical signal meets the preset phase compensation requirement.

[0095] Specifically, the target optical path adjustment parameter is obtained by the following formula:

[0096] .

[0097] in, for i The target optical path adjustment parameters corresponding to the subharmonics are: is the wavelength of the laser beam, for i The phase error corresponding to the subharmonic is n is the refractive index of the phase retarder.

[0098] Furthermore, some sub-beams may already be close to the target phase after passing through the electro-optic modulator, while others may require further fine-tuning (i.e., not reaching the preset target sub-beam requirements). These sub-beams are then fine-tuned using a phase retarder. For example, if a harmonic of a specific frequency requires finer phase adjustment, the controller passes the corresponding sub-beam through the phase retarder. The phase retarder, based on its own optical properties and design parameters, further alters the phase of the target sub-beam, achieving even finer phase control to meet complex harmonic suppression requirements.

[0099] After modulation by the electro-optic modulator, it is assumed that the corresponding second photodetector detects that the target sub-beam phase of the 5th harmonic is -160° (20° is still required relative to the target -180°), the phase of the 7th harmonic sub-beam is -170°, and the phase of the 11th harmonic sub-beam is -150°. Assume that the refractive index of the material of the phase retarder is n is 1.5, and the incident wavelength is . Among them, if the phase of a multi-harmonic sub-beam is close to the target phase value, then there is no need to start the corresponding phase delay device. For example, the 5th harmonic phase is not in the accurate range, the 7th harmonic phase is not in the accurate range, and the 11th harmonic phase is in the accurate range, then it is only necessary to start the phase delay device corresponding to the 5th harmonic photoelectric modulation phase compensation path and the phase delay device corresponding to the 7th harmonic channel. The controller determines the difference between the current phase and the target phase based on the detection results to control the operation of the phase delay device: for the 5th harmonic sub-beam, the phase needs to be delayed by -180°-(-160°)=-20° (i.e. 20°, which is converted to radians as 20×π / 180=π / 9 radians). The controller controls the phase delay device based on the phase delay formula , we can get: , that is, the phase retarder corresponding to the 5th harmonic beam needs to increase the optical path by about , according to the optical path difference Control the operation of the phase delay device (the same applies to other harmonics, such as the compensation calculation and processing of the aforementioned 7th harmonic, which will not be repeated here).

[0100] In step S6, when the target phase compensation electrical signal is received, the signal processing device is controlled to be turned on so that the target phase compensation electrical signal is input into the signal processing device, so that the signal processing device suppresses the harmonic information generated by the target power converter according to the target phase compensation electrical signal.

[0101] Specifically, the phase-modulated and delayed sub-beams are recombined in a specific optical structure (i.e., an optical beam combiner). The recombined phase-compensated optical signal is detected by a first photodetector, which converts it into a phase-compensated electrical signal. The phase of the phase-compensated electrical signal is complementary to the phase of the harmonic information in the target power converter. Ideally, the phase of the phase-compensated electrical signal generated by the first photodetector is 180° out of phase with the phase of each harmonic of the harmonic information, thereby canceling out the harmonics. For example, for the fifth harmonic, the optical phase shifting system generates an electrical signal with the same fifth harmonic frequency to cancel out the fifth harmonic generated by the power converter.

[0102] The phase-compensated electrical signal is processed by a signal processing device, which includes signal amplification and filtering, ultimately generating a phase-compensated electrical signal with an appropriate amplitude and opposite phase to the harmonic signal. This phase-compensated electrical signal is superimposed with the harmonic at the output of the target power converter or at an appropriate coupling point, thereby achieving harmonic cancellation.

[0103] This application includes the following technical points:

[0104] 1. The refractive index of the sub-beam is changed by using the electro-optic effect, thereby realizing phase modulation of the sub-beam. The modulation of the electro-optic effect has the advantage of fast response.

[0105] 2. Applied to the target power converter and work in conjunction with the converter system.

[0106] 3. Perform electro-optical modulation on multiple sub-beams and combine them with other optical components (such as optical beam splitters and phase delay devices) and electronic components (such as controllers, first photodetectors, and second photodetectors) to form a complex optical phase shifting system.

[0107] In summary, according to the harmonic suppression method, apparatus, device, and medium based on optical phase shifting provided in this application, a first optical detector can be used to detect and obtain harmonic information generated by a target power converter, and then the phase compensation parameters required by the optoelectronic modulation phase compensation device can be determined based on the harmonic information. After the phase compensation parameters are input to the optoelectronic modulation phase compensation device, the optoelectronic modulation phase compensation device outputs a phase-compensated optical signal based on the phase compensation parameters. The first optical detector detects the phase-compensated optical signal and converts the detected phase-compensated optical signal into a phase-compensated electrical signal.

[0108] By determining whether the phase compensation electrical signal meets the preset phase compensation requirements, if not, the phase compensation parameters are adjusted according to the phase compensation electrical signal until the first optical detector sends a target phase compensation electrical signal that meets the preset phase compensation requirements. At this time, the signal processing device is turned on to input the target phase compensation electrical signal into the signal processing device, so that the signal processing device can suppress the harmonic information generated by the target power converter according to the target phase compensation electrical signal. The present application can accurately and effectively suppress the harmonics generated by the target power converter through optical phase shifting, solving the problems of parasitic parameters, poor suppression effect, slow response speed, etc. caused by the existing electrical phase shifting method.

[0109] According to one aspect of the present application, a harmonic suppression device based on optical phase shifting is also proposed, such as Figure 4 As shown, Figure 4is a block diagram of a harmonic suppression device based on optical phase shifting, which includes: a first receiving unit 301 , a determining unit 302 , a second receiving unit 303 , a judging unit 304 , an adjusting unit 305 , and a harmonic suppression unit 306 .

[0110] A first receiving unit 301 is configured to receive harmonic information sent by the first optical detector, where the harmonic information is obtained by the first optical detector detecting a target power converter;

[0111] A determining unit 302 is configured to determine a phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information;

[0112] a second receiving unit 303, configured to receive a phase-compensated electrical signal sent by the first photodetector after the photoelectric modulation phase compensation device outputs a phase-compensated optical signal according to the phase compensation parameter, the phase-compensated electrical signal being obtained by converting the phase-compensated optical signal by the first photodetector;

[0113] The judging unit 304 is configured to judge whether the phase compensation electrical signal meets a preset phase compensation requirement.

[0114] an adjusting unit 305, configured to adjust the phase compensation parameter according to the phase compensation electrical signal, and send the adjusted phase compensation parameter to the photoelectric modulation phase compensation device until a target phase compensation electrical signal sent by the first light detector is received, and the target phase compensation electrical signal meets a preset phase compensation requirement;

[0115] The harmonic suppression unit 306 is used to control the signal processing device to start up when receiving the target phase compensation electrical signal, so that the target phase compensation electrical signal is input into the signal processing device, so that the signal processing device suppresses the harmonic information generated by the target power converter according to the target phase compensation electrical signal.

[0116] The present application also discloses an electronic device, including:

[0117] at least one processor;

[0118] at least one memory for storing at least one program;

[0119] When at least one program is executed by at least one processor, the at least one processor implements the above method.

[0120] It can be understood that the contents of the specific embodiments of the above-mentioned method are applicable to the embodiment of this electronic device. The functions specifically implemented by the embodiment of this electronic device are the same as those of the embodiment of the above-mentioned method, and the beneficial effects achieved are also the same as those achieved by the embodiment of the above-mentioned method.

[0121] For example, referring to Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Taking the electronic device as a terminal device as an example, Figure 5 In the embodiment, the terminal device 1200 may include an RF (Radio Frequency) circuit 1210, a memory 1220 including one or more computer-readable storage media, an input unit 1230, a display unit 1240, a sensor 1250, an audio circuit 1260, a short-range wireless transmission module 1270, a processor 1280 including one or more processing cores, and a power supply 1290. Those skilled in the art will understand that Figure 5 The device structure shown in the figure does not constitute a limitation on the terminal device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0122] The RF circuit 1210 can be used to receive and transmit signals during information transmission or calls. Specifically, it receives downlink information from the base station and transmits it to one or more processors 1180 for processing. It also transmits uplink data to the base station. Typically, the RF circuit 1210 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a SIM card, a transceiver, a coupler, an LNA (Low Noise Amplifier), a duplexer, and the like. Furthermore, the RF circuit 1210 can communicate with the network and other devices via wireless communication. Wireless communication can utilize any communication standard or protocol, including but not limited to GSM (Global System of Mobile Communications), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), email, and SMS (Short Messaging Service).

[0123] The memory 1220 can be used to store software programs and modules (or units). The processor 1280 executes various functional applications and data processing by running the software programs and modules (or units) stored in the memory 1220. The memory 1220 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function), etc.; the data storage area may store data created according to the use of the terminal device 1200 (such as audio data, a phone book), etc. In addition, the memory 1220 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device. Accordingly, the memory 1220 may also include a memory controller to provide the processor 1280 and the input unit 1230 with access to the memory 1220. Although Figure 5 The RF circuit 1210 is shown, but it is understandable that it is not a necessary component of the terminal device 1200 and can be omitted as needed without changing the essence of the invention.

[0124] The input unit 1230 can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical, or trackball signal input related to object settings and function control. Specifically, the input unit 1230 may include a touch-sensitive surface 1231 and other input devices 1232. The touch-sensitive surface 1231, also known as a touch display or touchpad, can detect touch operations performed by an object on or near it (for example, operations performed by an object using a finger, stylus, or any other suitable object or accessory on or near the touch-sensitive surface 1231) and drive corresponding connected devices according to a pre-set program. Optionally, the touch-sensitive surface 1231 may include a touch detection device and a touch controller. The touch detection device detects the touch position of the object and detects signals generated by the touch operation, transmitting the signals to the touch controller. The touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 1280. It can also receive and execute instructions from the processor 1280. In addition, the touch-sensitive surface 1231 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch-sensitive surface 1231, the input unit 1230 can also include other input devices 1232. Specifically, the other input devices 1232 can include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, and the like.

[0125] The display unit 1240 can be used to display information input by an object or information provided to an object and to control various graphic object interfaces of the terminal device 1200. These graphic object interfaces can be composed of graphics, text, icons, videos and any combination thereof. The display unit 1140 may include a display panel 1241. Optionally, the display panel 1241 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Furthermore, the touch-sensitive surface 1231 may be covered on the display panel 1241. When the touch-sensitive surface 1231 detects a touch operation on or near it, it is transmitted to the processor 1280 to determine the type of touch event. The processor 1280 then provides corresponding visual output on the display panel 1241 according to the type of touch event. Although in Figure 5 In the embodiment, the touch-sensitive surface 1231 and the display panel 1241 are implemented as two independent components to implement input and output functions, but in some embodiments, the touch-sensitive surface 1231 and the display panel 1241 can be integrated to implement input and output functions.

[0126] The terminal device 1200 may also include at least one sensor 1250, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 1241 according to the brightness of the ambient light, and the proximity sensor may turn off the display panel 1241 or the backlight when the terminal device 1200 is moved to the ear. As a type of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as switching between horizontal and vertical screens, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the terminal device 1200, such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be described in detail here.

[0127] The audio circuit 1260, speaker 1261, and microphone 1262 provide an audio interface between the target device and the terminal device 1200. The audio circuit 1260 converts received audio data into electrical signals and transmits them to the speaker 1261, which then converts them into sound signals for output. Meanwhile, the microphone 1262 converts collected sound signals into electrical signals, which are then received by the audio circuit 1260 and converted into audio data. The audio data is then processed by the output processor 1280 and transmitted to another electronic device via the RF circuit 1210. Alternatively, the audio data is output to the memory 1220 for further processing. The audio circuit 1260 may also include an earphone jack to facilitate communication between an external headset and the terminal device 1200.

[0128] The short-range wireless transmission module 1270 may be a WIFI (wireless fidelity) module, a Bluetooth module, an infrared module, etc. The terminal device 1200 may transmit information with wireless transmission modules provided on other devices via the short-range wireless transmission module 1270 .

[0129] Processor 1280 is the control center of terminal device 1200. It connects the various components of the entire device using various interfaces and circuits. By running or executing software programs or modules stored in memory 1220 and accessing data stored in memory 1220, it performs various functions of terminal device 1200 and processes data, thereby providing overall control over the device. Optionally, processor 1280 may include one or more processing cores; alternatively, processor 1280 may integrate an application processor and a modem processor, with the application processor primarily handling the operating system, object interfaces, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 1280.

[0130] The terminal device 1200 also includes a power supply 1290 (e.g., a battery) for supplying power to various components. Optionally, the power supply 1290 can be logically connected to the processor 1280 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The power supply 1290 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.

[0131] Although not shown, the terminal device 1200 may also include a camera, a Bluetooth module, etc., which will not be described in detail here.

[0132] The embodiment of the present application further discloses a computer-readable storage medium, which stores a program executable by a processor. The program executable by the processor is used to implement the method embodiment as described above when executed by the processor.

[0133] It can be understood that the contents of the above-mentioned method embodiments are all applicable to the computer-readable storage medium embodiments. The functions specifically implemented by the computer-readable storage medium embodiments are the same as those of the above-mentioned method embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned method embodiments.

[0134] The embodiments of the present application further disclose a computer program product or a computer program, wherein the computer program product or the computer program includes computer instructions, and the computer instructions are stored in the above-mentioned computer-readable storage medium; Figure 5 The processor of the electronic device shown can read the computer instructions from the above-mentioned computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the above-mentioned method.

[0135] It can be understood that the contents of the above-mentioned method embodiments are all applicable to this computer program product or computer program embodiment, and the functions specifically implemented by this computer program product or computer program embodiment are the same as those of the above-mentioned method embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned method embodiments.

[0136] In some optional embodiments, the functions / operations mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, the two boxes shown in succession may actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiments presented and described in the flow chart of the present application are provided in an exemplary manner for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operations and logic flows presented herein. Optional embodiments are contemplated in which the order of the various operations is changed and the sub-operations described as a part of a larger operation are performed independently.

[0137] In addition, although the present application is described in the context of functional modules, it should be understood that, unless otherwise stated, one or more of the functions and / or features may be integrated into a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It is also understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present application. More specifically, given the properties, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the module will be understood within the routine skills of an engineer. Therefore, a person skilled in the art can implement the present application as set forth in the claims using ordinary techniques without undue experimentation. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is determined by the full scope of the appended claims and their equivalents.

[0138] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0139] The logic and / or steps represented in a flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0140] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logic functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc.

[0141] In the above description of this specification, reference to the terms "one embodiment / example," "another embodiment / example," or "certain embodiments / examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0142] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0143] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present application, and these equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A harmonic suppression method based on optical phase shifting, characterized in that: Applicable to an optical phase shifting system, the optical phase shifting system includes a photoelectric modulation phase compensation device, a first light detector, a signal processing device and a controller; the photoelectric modulation phase compensation device, the first light detector and the signal processing device are connected in sequence and are all connected to the controller; The method is executed by the controller, and the method includes: receiving harmonic information sent by the first optical detector, where the harmonic information is obtained by detecting a target power converter by the first optical detector; determining a phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information; After the electro-optical modulation phase compensation device outputs a phase-compensated optical signal according to the phase compensation parameter, receiving a phase-compensated electrical signal sent by the first photodetector, the phase-compensated electrical signal being obtained by converting the phase-compensated optical signal by the first photodetector; Determining whether the phase compensation electrical signal meets a preset phase compensation requirement; If the phase compensation electrical signal does not meet the preset phase compensation requirement, adjusting the phase compensation parameter according to the phase compensation electrical signal, and sending the adjusted phase compensation parameter to the photoelectric modulation phase compensation device until a target phase compensation electrical signal sent by the first light detector is received, and the target phase compensation electrical signal meets the preset phase compensation requirement; When receiving the target phase compensation electrical signal, controlling the signal processing device to start, so that the target phase compensation electrical signal is input to the signal processing device, so that the signal processing device suppresses the harmonic information generated by the target power converter according to the target phase compensation electrical signal; The photoelectric modulation phase compensation device includes a laser source, an optical beam splitter, a plurality of photoelectric modulation phase compensation paths connected to the optical beam splitter, and an optical beam combiner connected to the plurality of photoelectric modulation phase compensation paths; the laser source, the optical beam splitter, the photoelectric modulation phase compensation paths, and the optical beam combiner are connected in sequence; The optical beam splitter splits the laser beam emitted by the laser source to obtain a plurality of optical beams, each of which is input into a respective electro-optical modulation phase compensation path. The electro-optical modulation phase compensation path outputs a sub-phase compensation optical signal corresponding to each optical beam according to the phase compensation parameter, each sub-phase compensation optical signal corresponding to a plurality of harmonics in the harmonic information. The optical beam combiner combines the sub-phase compensation optical signals to obtain the phase compensation optical signal. Each of the electro-optical modulation phase compensation paths includes an electro-optical modulator, a second optical detector, and a phase delay device connected in sequence, wherein the electro-optical modulator, the second optical detector, and the phase delay device are all connected to the controller; the electro-optical modulator is connected to the optical beam splitter, the phase delay device is connected to the optical beam combiner, and the second optical detector is used to detect the phase offset; and determining the phase compensation parameters of the electro-optical modulation phase compensation device based on the harmonic information includes: Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information; Determining the phase difference to be compensated for each harmonic according to the amplitude information, each harmonic corresponding to a single optoelectronic modulation phase compensation path; For each electro-optical modulation phase compensation path, determining a voltage parameter applied to the electro-optical modulator according to the phase difference to be compensated, and if the phase offset of the optical beam output by the electro-optical modulator does not meet a preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, determining an optical path adjustment parameter of the phase retarder according to the phase offset; The phase compensation parameter is determined according to each of the voltage parameters and each of the optical path adjustment parameters.

2. The harmonic suppression method based on optical phase shifting according to claim 1, characterized in that: The preset phase compensation requirement includes that the phase of each sub-beam for compensating each harmonic reaches a preset phase threshold; the adjusted phase compensation parameter is obtained by the following steps: Acquire the phase of each of the sub-beams according to the phase compensation electrical signal, and determine the target sub-beam that does not reach the preset phase threshold according to the phase of each of the sub-beams; For each target sub-beam, determining a target voltage parameter to be applied to the electro-optical modulator and a target optical path adjustment parameter of the phase retarder based on a phase error between the phase of the target sub-beam and the preset phase threshold and a type of harmonics corresponding to the target sub-beam; The target voltage parameter and the target optical distance adjustment parameter are used as the adjusted phase compensation parameter.

3. The harmonic suppression method based on optical phase shifting according to claim 2, characterized in that: The target voltage parameter is obtained by the following formula: ； in, is the wavelength of the laser beam, for i The phase error corresponding to the subharmonic is for i The target voltage parameters corresponding to the subharmonics are: n is the refractive index of the electro-optic modulator, reff is the electro-optic coefficient.

4. The harmonic suppression method based on optical phase shifting according to claim 3, characterized in that: The target optical path adjustment parameter is obtained by the following formula: ； in, for i The target optical path adjustment parameters corresponding to the subharmonics are: is the wavelength of the laser beam, for i The phase error corresponding to the subharmonic is n is the refractive index of the phase retarder.

5. The harmonic suppression method based on optical phase shifting according to claim 4, characterized in that: described i The frequency of the subharmonic is the fundamental frequency. i times.

6. A harmonic suppression device based on optical phase shifting, characterized in that: Applicable to an optical phase shifting system, the optical phase shifting system comprising a photoelectric modulation phase compensation device, a first light detector, a signal processing device and a controller; The photoelectric modulation phase compensation device, the first light detector and the signal processing device are connected in sequence and are all connected to the controller; the device includes: a first receiving unit, configured to receive harmonic information sent by the first optical detector, wherein the harmonic information is obtained by detecting a target power converter by the first optical detector; a determining unit, configured to determine a phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information; a second receiving unit, configured to receive a phase-compensated electrical signal sent by the first photodetector after the photoelectric modulation phase compensation device outputs a phase-compensated optical signal according to the phase compensation parameter, the phase-compensated electrical signal being obtained by converting the phase-compensated optical signal by the first photodetector; a judging unit, configured to judge whether the phase compensation electrical signal meets a preset phase compensation requirement; an adjusting unit, configured to adjust the phase compensation parameter according to the phase compensation electrical signal, and send the adjusted phase compensation parameter to the photoelectric modulation phase compensation device until a target phase compensation electrical signal sent by the first light detector is received, and the target phase compensation electrical signal meets a preset phase compensation requirement; a harmonic suppression unit, configured to, upon receiving the target phase compensation electrical signal, control the signal processing device to start up, so that the target phase compensation electrical signal is input into the signal processing device, so that the signal processing device suppresses the harmonic information generated by the target power converter according to the target phase compensation electrical signal; The photoelectric modulation phase compensation device includes a laser source, an optical beam splitter, a plurality of photoelectric modulation phase compensation paths connected to the optical beam splitter, and an optical beam combiner connected to the plurality of photoelectric modulation phase compensation paths; the laser source, the optical beam splitter, the photoelectric modulation phase compensation paths, and the optical beam combiner are connected in sequence; The optical beam splitter splits the laser beam emitted by the laser source to obtain a plurality of optical beams, each of which is input into a respective electro-optical modulation phase compensation path. The electro-optical modulation phase compensation path outputs a sub-phase compensation optical signal corresponding to each optical beam according to the phase compensation parameter, each sub-phase compensation optical signal corresponding to a plurality of harmonics in the harmonic information. The optical beam combiner combines the sub-phase compensation optical signals to obtain the phase compensation optical signal. Each of the electro-optical modulation phase compensation paths includes an electro-optical modulator, a second optical detector, and a phase delay device connected in sequence, wherein the electro-optical modulator, the second optical detector, and the phase delay device are all connected to the controller; the electro-optical modulator is connected to the optical beam splitter, the phase delay device is connected to the optical beam combiner, and the second optical detector is used to detect the phase offset; and determining the phase compensation parameters of the electro-optical modulation phase compensation device based on the harmonic information includes: Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information; Determining the phase difference to be compensated for each harmonic according to the amplitude information, each harmonic corresponding to a single optoelectronic modulation phase compensation path; For each electro-optical modulation phase compensation path, determining a voltage parameter applied to the electro-optical modulator according to the phase difference to be compensated, and if the phase offset of the optical beam output by the electro-optical modulator does not meet a preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, determining an optical path adjustment parameter of the phase retarder according to the phase offset; The phase compensation parameter is determined according to each of the voltage parameters and each of the optical path adjustment parameters.

7. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the harmonic suppression method based on optical phase shifting according to any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the harmonic suppression method based on optical phase shifting according to any one of claims 1 to 5 is implemented.

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