Harmonic suppression method, device and equipment based on optical phase shift and medium

Abstract

The invention relates to the technical field of electronic devices, in particular to a harmonic suppression method and device based on optical phase shift, equipment and a medium. The method comprises the following steps: receiving harmonic information sent by the first optical detector; determining a phase compensation parameter according to the harmonic information; receiving a phase compensation electric signal sent by the first light detector; judging whether the phase compensation electric signal meets a preset phase compensation requirement or not; and adjusting a phase compensation parameter according to the phase compensation electric signal, and sending the adjusted phase compensation parameter to a photoelectric modulation phase compensation device until a target phase compensation electric signal sent by the first optical detector is received, and controlling the signal processing device to be started. The harmonic waves generated by the target power converter can be suppressed accurately and effectively in an optical phase shift mode, and the problems of parasitic parameters, poor suppression effect, low response speed and the like caused by an electrical phase shift method in an existing mode are solved.

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 the industrial, power and transportation fields. Among them, the application of power converters in power systems is an important application direction. Power converters can extract electric energy from transmission lines, control the power quality and conversion direction, and thus realize the flow and transmission of grid energy. In addition, converters can also convert renewable energy such as solar energy and wind energy into direct current, and further convert direct current into alternating current and supply power to the grid.

[0003] In order to achieve the conversion of electric energy, a large number of conversion circuits in various forms such as AC / DC, DC / AC, voltage conversion, PWM / SPWM / SVPWM are designed in the power converter, which will generate harmonics. Harmonics will reduce the power of the motor and even cause the equipment to malfunction; harmonic voltage and harmonic current will increase line losses, leading to problems such as increased power transmission costs.

[0004] Most existing harmonic suppression methods are implemented using electrical phase shifting methods, which adjust the phase by changing the capacitance and inductance values ​​in the circuit or using some electrical means such as electronic phase shifters to achieve the effect of suppressing harmonics. However, the electrical phase shifting method is easily affected by changes in circuit parameters. Factors such as temperature and component aging can cause the phase shifting accuracy to decrease. Moreover, electrical components will have parasitic parameter problems under high frequency conditions, which limits their performance in high-frequency harmonic suppression. In addition, the response speed of the electrical phase shifting method is relatively slow, and it is difficult to respond 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, device, equipment and medium based on optical phase shifting, which can accurately and effectively suppress various types of harmonics generated by a target power converter by means of 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, wherein the optical phase shifting system comprises 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 in the controller, and the method comprises: receiving 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; 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 compensation optical signal according to the phase compensation parameter, receiving a phase compensation electrical signal sent by the first photodetector, the phase compensation electrical signal being obtained by converting the phase compensation 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, 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 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 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.

[0007] Optionally, the photoelectric modulation phase compensation device comprises a laser source, an optical beam splitter, a plurality of photoelectric modulation phase compensation paths connected to the optical beam splitter, and a photosynthetic 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 photosynthetic beam combiner are connected in sequence; Among them, 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.

[0008] Optionally, each of the photoelectric modulation phase compensation paths includes an electro-optic modulator, a second photodetector, and a phase delayer connected in sequence, the electro-optic modulator, the second photodetector, and the phase delayer are all connected to the controller; the electro-optic modulator is connected to the optical beam splitter, and the phase delayer is connected to the optical beam combiner; and determining the phase compensation parameters of the photoelectric modulation phase compensation device according to the harmonic information includes: Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information; Determine the phase difference to be compensated of each harmonic according to each amplitude information, each harmonic corresponds to a single photoelectric modulation phase compensation path; For each electro-optical modulation phase compensation path, a voltage parameter applied to the electro-optical modulator is determined according to the phase difference to be compensated, and if the phase offset of the light beam output by the electro-optical modulator does not meet the preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, an optical path adjustment parameter of the phase retarder is determined according to the phase offset; Determine the phase compensation parameter according to each of the voltage parameters and each of the optical path adjustment parameters; The second light detector is used to detect the phase shift.

[0009] 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: 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-optic modulator and a target optical path adjustment parameter of the phase retarder according to 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 path adjustment parameter are used as the adjusted phase compensation parameter.

[0010] Optionally, 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 subharmonics 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.

[0011] Optionally, the target optical path adjustment parameter is obtained by the following formula: ; in, for iThe 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 subharmonics is n is the refractive index of the phase retarder.

[0012] Optionally, the i The frequency of the subharmonic is equal to the fundamental frequency. i times.

[0013] 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, wherein the optical phase shifting system comprises 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 device comprises: 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 determination 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 compensation electrical signal sent by the first photodetector after the photoelectric modulation phase compensation device outputs a phase compensation optical signal according to the phase compensation parameter, wherein the phase compensation electrical signal is obtained by converting the phase compensation optical signal by the first photodetector; A judging unit, for judging 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 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.

[0014] On the other hand, an embodiment of the present application provides an electronic device, including a processor and a memory; The memory is used to store computer programs; The processor executes the computer program to implement the aforementioned method.

[0015] 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.

[0016] The embodiments of the present application include at least the following beneficial effects: According to a harmonic suppression method, device, equipment and medium based on optical phase shifting provided by the present application, the harmonic information generated by the target power converter can be detected by a first optical detector, and then the phase compensation parameters required by the optoelectronic modulation phase compensation device can be determined according to 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 compensation optical signal according to the phase compensation parameters, and the first optical detector detects the phase compensation optical signal and converts the detected phase compensation optical signal into a phase compensation electrical signal.

[0017] By judging 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 light 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 allow the target phase compensation electrical signal to be input 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 by optical phase shifting, solving the problems of parasitic parameters, poor suppression effect, slow response speed, etc. caused by the electrical phase shifting method in the existing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide 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.

[0019] Figure 1 A logical schematic diagram of the optical phase shifting process provided by an embodiment of the present application; Figure 2 A logical diagram of an exemplary optical phase shifting process provided in an embodiment of the present application; Figure 3 A schematic flow chart of a harmonic suppression method based on optical phase shifting provided in an embodiment of the present application; Figure 4 A block diagram of a harmonic suppression device based on optical phase shifting provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with 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 only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0021] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment 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 can be interpreted as "at the time of" or "when" or "in response to determination".

[0022] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0024] The method provided in the embodiment of the present application can be applied to a terminal, can also be applied to a server, and can also be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, and a car terminal, etc., but is not limited to this; the server side can be configured as an independent physical server, or a server cluster or distributed system composed of multiple physical servers, and can also be configured 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.

[0025] 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, etc. 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, etc. 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 through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0026] The specific hardware environment of the present application is described in detail below. The optical phase shifting system of the present 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 beam 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 beam 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 beam combiner. For details, see Figure 1 As shown, Figure 1 N optoelectronic modulation phase compensation paths (corresponding to 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 the corresponding photoelectric modulation phase compensation path) according to the harmonics such as 2nd harmonic, 3rd harmonic, N+1th harmonic, etc. generated by the target power converter to perform phase compensation respectively, and finally combine the beams by the optical combiner after phase compensation to obtain the overall phase compensated optical signal. The optical phase shifting system of the present application can dynamically expand different photoelectric modulation phase compensation paths according to the different types of harmonics generated, and can be adaptively adjusted according to the different harmonic information generated by different target power converters.

[0027] For example, see Figure 2 As shown, Figure 2In the figure, the harmonic information of the target power converter is that three types of harmonics are generated, namely 5th harmonic, 7th harmonic and 11th harmonic, where 5th harmonic means that the frequency of the harmonic is 5 times the fundamental frequency, 7th harmonic means that the frequency of the harmonic is 7 times the fundamental frequency, and 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).

[0028] The following is a detailed explanation of the working principle of each component: Laser source: energy source, that is, the emission source of the laser beam, used to emit a laser beam of specific wavelength and intensity, and provide a stable optical signal for subsequent optical phase shifting operations. The laser source can be a semiconductor laser, which has 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 divides the laser beam into several sub-beams according to the settings, for example, into N sub-beams, and each beam can be optically phase-shifted independently. For example, for the 5th harmonic and the 7th harmonic, they 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 phase-modulated and delayed differently, so that they can produce a phase opposite to a specific harmonic frequency (such as the 5th harmonic, the 7th harmonic, the 11th harmonic, etc.) after resynthesis, thereby achieving targeted suppression of different harmonics.

[0029] Electro-optic modulator: A key device for achieving optical phase shifting, used to utilize the electro-optic effect. When an electric field is applied to certain crystals, their refractive index changes, thereby changing the phase of light passing through the crystal. By inputting the input laser beam (laser signal) into the electro-optic modulator and applying a suitable voltage signal, the phase of the light can be precisely controlled.

[0030] Beam splitter: It is used to realize different principles, such as using the reflection and transmission characteristics of dielectric films to split a single beam from a laser source into multiple sub-beams according to a predetermined ratio. It can be selected according to specific design requirements. Multiple sub-beams will go through different optical paths and processing to achieve control of different phases.

[0031] 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 therein, 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-optic modulator has undergone a preliminary change, but may not meet the final precise harmonic suppression requirements. The phase retarder can perform further fine phase adjustments on these sub-beams.

[0032] The first photodetector and the 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 where 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. According to the photovoltaic effect, when light shines on its PN junction, the photodiode generates a current signal proportional to the light intensity.

[0033] Controller: The controller can be a circuit based on a microprocessor or a digital signal processor (DSP), which is used to receive the electrical signal from the first optical detector and the second optical detector, and analyze and process the electrical signal according to the preset algorithm and the preset phase compensation requirement, compare it with the phase of the preset phase compensation requirement, and generate 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 related parameters to readjust the optical phase shifting process. Through continuous feedback and adjustment, the continuous and effective suppression of the harmonics of the power converter is achieved, so that the power quality output by the target power converter meets the relevant standards and requirements, so as to ensure that the optical phase shifting process can accurately suppress the harmonics generated by the target power converter.

[0034] 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: 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.

[0035] Specifically, the first optical detector is used not only to detect the phase-compensated optical signal after the optical phase shift processing, but also to detect the harmonic information generated by the target power converter. The first optical detector is used to detect the phase-compensated optical signal after the optical phase shift processing, and send the phase-compensated optical signal to the signal processing device in the form of an electrical signal, so that the signal processing device performs signal processing and then outputs the coupling; 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.

[0036] In step S2, a phase compensation parameter of the electro-optical modulation phase compensation device is determined according to the harmonic information.

[0037] Specifically, see Figure 1 and Figure 2 As shown, the phase compensation parameter can be expressed as a whole: 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.

[0038] In one embodiment of the present application, each of the photoelectric modulation phase compensation paths includes an electro-optic modulator, a second photodetector, and a phase delayer connected in sequence, the electro-optic modulator, the second photodetector, and the phase delayer are all connected to the controller; the electro-optic modulator is connected to the optical beam splitter, and the phase delayer is connected to the optical beam combiner; the phase compensation parameter of the photoelectric modulation phase compensation device is determined according to the harmonic information, including: Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information; Determine the phase difference to be compensated of each harmonic according to each amplitude information, each harmonic corresponds to a single photoelectric modulation phase compensation path; For each electro-optical modulation phase compensation path, a voltage parameter applied to the electro-optical modulator is determined according to the phase difference to be compensated, and if the phase offset of the light beam output by the electro-optical modulator does not meet the preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, an optical path adjustment parameter of the phase retarder is determined according to the phase offset; Determine the phase compensation parameter according to each of the voltage parameters and each of the optical path adjustment parameters; The second light detector is used to detect the phase shift.

[0039] 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 by the amplitude information. For example, according to the grid access standard and application requirements, the controller sets the target amplitude of the 5th harmonic suppression to 0.05A. 1 , the target amplitude of the 7th harmonic suppression is 0.03A 1 , the amplitude of the 11th harmonic suppression target is 0.02A 1 , A 1 is the fundamental wave amplitude. The target amplitude of multiple harmonic suppression is used to determine whether the grid access standard and application requirements are met. When the target amplitude does not meet the standard, the corresponding phase difference is detected according to the amplitude, and the compensation parameters are readjusted.

[0040] The electrical signal output by the second photodetector is transmitted to the controller, which readjusts the amplitude according to the actual amplitude and the target amplitude. For example, the amplitude of the 5th harmonic currently detected is 0.06A. 1 , the phase is 175°, and the amplitude error is 0.06A 1 -0.05A 1 =0.01A 1 , the phase error is 175°-180°=-5° (converted to -π / 36 radians). 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, which are used to readjust the voltage of the electro-optic modulator, and may adjust the optical path adjustment parameters of the phase retarder (such as recalculating the optical path adjustment amount according to the new phase error), and then repeat the above process until the 5th harmonic meets the suppression target (that is, the phase of the target sub-beam reaches 180°). Similarly, the 7th and 11th harmonics are continuously monitored and adjusted, and finally the power quality output by the target power converter meets the standard.

[0041] In step S3, after the optoelectronic modulation phase compensation device outputs a phase compensation optical signal according to the phase compensation parameter, it receives a phase compensation electrical signal sent by the first photodetector, wherein the phase compensation electrical signal is obtained by converting the phase compensation optical signal by the first photodetector.

[0042] Specifically, the first light detector converts the phase compensation optical signal output by the photoelectric modulation phase compensation device according to the phase compensation parameters into a phase compensation electrical signal, and sends it to the controller. At this time, the controller can analyze and process the phase compensation electrical signal to determine whether the current phase compensation electrical signal meets the preset phase compensation requirement, wherein 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°.

[0043] 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 voltage required to be applied 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, it is only necessary to calculate the voltage parameters required for the 5th harmonic to obtain the voltage parameters required for other harmonics. The voltage parameters or target voltage parameters of the 5th harmonic can be obtained by the following formula: .

[0044] So, i =5, the voltage parameters or target voltage parameters of the 5th harmonic can be obtained , for example, the incident wavelength of the laser beam is In this embodiment, lithium niobate (LiNbO 3 ) Take the electro-optic modulator 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 phase of the 5th harmonic is 0°, so the required phase offset is 0°-180°=-180°, that is - π ,therefore , from which we can get:

[0045] Similarly, the voltage parameters required for the 7th harmonic and the 11th harmonic can be calculated, where the voltage parameter required for the 7th harmonic is:

[0046] The voltage parameters required for the 11th harmonic are:

[0047] In step S4, it is determined whether the phase compensation electrical signal meets a preset phase compensation requirement.

[0048] 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: 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-optic modulator and a target optical path adjustment parameter of the phase retarder according to 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 path adjustment parameter are used as the adjusted phase compensation parameter.

[0049] Specifically, by judging whether the phase of each corresponding sub-beam in the phase compensation electrical signal has reached the 180° phase compensation requirement, if the phase of any sub-beam does not meet the requirement, a new optical phase shift adjustment is required. The target sub-beam refers to the sub-beam whose phase offset or phase does not meet the corresponding requirement.

[0050] In step S5, if the phase compensation electrical signal does not meet the preset phase compensation requirement, the phase compensation parameters are adjusted according to the phase compensation electrical signal, and the adjusted phase compensation parameters are 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.

[0051] Specifically, the target optical path adjustment parameter is obtained by the following formula: .

[0052] 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 subharmonics is n is the refractive index of the phase retarder.

[0053] Furthermore, some sub-beams may be close to the target phase after passing through the electro-optic modulator, while some sub-beams may need further fine-tuning (i.e., the target sub-beams that do not meet the preset requirements). The target sub-beams are finely adjusted through the phase retarder. For example, if a harmonic of a specific frequency requires a finer phase adjustment, the controller will pass the corresponding target sub-beam through the phase retarder, which will further change the phase of the target sub-beam according to its own optical characteristics and design parameters, thereby achieving finer phase control of the target sub-beam to meet complex harmonic suppression requirements.

[0054] After modulation by the electro-optic modulator, it is assumed that the corresponding second photodetector detects that the phase of the target sub-beam 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 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° (that is, 20°, converted to radians as 20×π / 180=π / 9 radians). .... , 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 is true for other harmonics, such as the compensation calculation and processing of the aforementioned 7th harmonic, which will not be repeated here).

[0055] In step S6, 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.

[0056] Specifically, the phase-modulated and delayed sub-beams are reunited in a specific optical structure (i.e., an optical beam combiner), and the reunited phase-compensated optical signal is detected by the first optical detector, which converts the phase-compensated optical signal into a phase-compensated electrical signal, and 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 converted by the first optical detector can be 180° different from the phase of each harmonic of the harmonic information, so that each harmonic can be offset. For example, for the 5th harmonic, the optical phase shifting system will generate an electrical signal with the same 5th harmonic frequency, which is used to offset the 5th harmonic generated by the power converter.

[0057] The phase compensation electric signal is processed by the signal processing device, which includes signal amplification, filtering and other links, and finally generates a phase compensation electric signal with a phase opposite to the harmonic signal and an appropriate amplitude. This phase compensation electric signal is superimposed with the harmonic at the output end of the target power converter or the appropriate coupling point, thereby achieving harmonic cancellation.

[0058] This application includes the following technical points: 1. The refractive index of the sub-beam is changed by using the electro-optic effect, thereby realizing the phase modulation of the sub-beam. The modulation of the electro-optic effect has the advantage of fast response.

[0059] 2. Applied to the target power converter and work in coordination with the converter system.

[0060] 3. Perform electro-optical modulation on multiple sub-beams, and combine other optical components (such as optical beam splitters, phase delay devices) and electronic components (such as controllers, first photodetectors, and second photodetectors) to form a complex optical phase shifting system.

[0061] In summary, according to a harmonic suppression method, device, equipment and medium based on optical phase shifting provided by the present application, the harmonic information generated by the target power converter can be detected by a first optical detector, and then the phase compensation parameters required by the optoelectronic modulation phase compensation device can be determined according to 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 compensation optical signal according to the phase compensation parameters, and the first optical detector detects the phase compensation optical signal and converts the detected phase compensation optical signal into a phase compensation electrical signal.

[0062] By judging 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 light 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 allow the target phase compensation electrical signal to be input 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 by optical phase shifting, solving the problems of parasitic parameters, poor suppression effect, slow response speed, etc. caused by the electrical phase shifting method in the existing method.

[0063] 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 4 is 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 .

[0064] A first receiving unit 301 is used 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; A determination unit 302, configured to determine a phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information; A second receiving unit 303 is used to receive a phase compensation electrical signal sent by the first photodetector after the photoelectric modulation phase compensation device outputs a phase compensation optical signal according to the phase compensation parameter, wherein the phase compensation electrical signal is obtained by converting the phase compensation optical signal by the first photodetector; The judging unit 304 is configured to judge whether the phase compensation electrical signal meets a preset phase compensation requirement.

[0065] An adjustment unit 305 is used 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; 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.

[0066] The present application also discloses an electronic device, including: at least one processor; at least one memory for storing at least one program; When at least one program is executed by at least one processor, the at least one processor implements the above method.

[0067] It can be understood that the contents of the specific embodiments of the above 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 above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0068] For example, refer to Figure 5 , Figure 5 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 appreciate 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.

[0069] The RF circuit 1210 can be used for receiving and sending signals during information transmission or calls. In particular, after receiving the downlink information of the base station, it is handed over to one or more processors 1180 for processing; in addition, the data related to the uplink is sent to the base station. Generally, the RF circuit 1210 includes but is not limited to an antenna, at least one amplifier, a tuner, one or more oscillators, a subject identity module (SIM) card, a transceiver, a coupler, an LNA (Low Noise Amplifier), a duplexer, etc. In addition, the RF circuit 1210 can also communicate with the network and other devices through wireless communication. Wireless communication can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), email, SMS (Short Messaging Service), etc.

[0070] 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 devices. 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.

[0071] 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 setting 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 screen or a touch pad, can collect touch operations of an object on or near it (such as operations of an object using a finger, a stylus or any other suitable object or accessory on or near the touch-sensitive surface 1231), and drive the corresponding connection device according to a pre-set program. Optionally, the touch-sensitive surface 1231 may include a touch detection device and a touch controller. Among them, the touch detection device detects the touch position of the object, detects the signal brought by the touch operation, and transmits the signal 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, and can receive instructions sent by the processor 1280 and execute them. In addition, the touch-sensitive surface 1231 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch-sensitive surface 1231, the input unit 1230 may further include other input devices 1232. Specifically, the other input devices 1232 may include, but are not limited to, one or more of a physical keyboard, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, and the like.

[0072] 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, texts, 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. Further, 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. Subsequently, the processor 1280 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.

[0073] 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 each direction (generally three axes), and can detect the magnitude and direction of gravity when stationary, which can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that can also be configured in the terminal device 1200, they will not be repeated here.

[0074] The audio circuit 1260, the speaker 1261, and the microphone 1262 can provide an audio interface between the object and the terminal device 1200. The audio circuit 1260 can transmit the electrical signal converted from the received audio data to the speaker 1261, which is converted into a sound signal for output; on the other hand, the microphone 1262 converts the collected sound signal into an electrical signal, which is received by the audio circuit 1260 and converted into audio data, and then the audio data is output to the processor 1280 for processing, and then sent to another electronic device through the RF circuit 1210, or the audio data is output to the memory 1220 for further processing. The audio circuit 1260 may also include an earplug jack to provide communication between an external headset and the terminal device 1200.

[0075] 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 through the short-range wireless transmission module 1270 .

[0076] The processor 1280 is the control center of the terminal device 1200. It uses various interfaces and lines to connect various parts of the entire device. By running or executing software programs or modules stored in the memory 1220, and calling data stored in the memory 1220, it executes various functions of the terminal device 1200 and processes data, thereby controlling the device as a whole. Optionally, the processor 1280 may include one or more processing cores; optionally, the processor 1280 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, object interface and application programs, etc., and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 1280.

[0077] The terminal device 1200 also includes a power supply 1290 (such as a battery) for supplying power to various components. Optionally, the power supply 1290 can be logically connected to the processor 1280 through a power management system, so as to manage charging, discharging, power consumption management, etc. through the power management system. The power supply 1290 can also include any components such as one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, and power status indicators.

[0078] Although not shown, the terminal device 1200 may also include a camera, a Bluetooth module, etc., which will not be described in detail here.

[0079] The embodiment of the present application further discloses a computer-readable storage medium, in which a program executable by a processor is stored. The program executable by the processor is used to implement the method embodiment as described above when executed by the processor.

[0080] It can be understood that the contents of the above-mentioned method embodiments are all applicable to the present computer-readable storage medium embodiments, the functions specifically implemented by the present 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.

[0081] The embodiment of the present application further discloses a computer program product or a computer program, the computer program product or the computer program comprising computer instructions, the computer instructions being 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.

[0082] It can be understood that the contents of the above-mentioned method embodiments are all applicable to the present computer program product or computer program embodiments, the functions specifically implemented by the present computer program product or computer program 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.

[0083] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the application is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part described as a larger operation is performed independently.

[0084] In addition, although the present application is described in the context of functional modules, it should be understood that, unless otherwise specified, one or more of the functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present application. More specifically, in view of the properties, functions, and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional techniques of the engineer. Therefore, those skilled in the art can implement the present application set forth in the claims without excessive experimentation using ordinary techniques. 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 attached claims and their equivalents.

[0085] 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 prior art 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, including a number of instructions to enable 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 codes.

[0086] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable storage medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in conjunction with such instruction execution systems, apparatuses, or devices. For purposes of this specification, a "computer-readable storage medium" may be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution systems, apparatuses, or devices.

[0087] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0088] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0089] 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 spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0090] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the embodiments. Technical personnel familiar with the field can make various equivalent modifications or substitutions without violating the spirit of the present application. 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: Applied to an optical phase shifting system, the optical phase shifting system comprises 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 the method includes: receiving 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; 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 compensation optical signal according to the phase compensation parameter, receiving a phase compensation electrical signal sent by the first photodetector, the phase compensation electrical signal being obtained by converting the phase compensation 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, 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 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 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.

2. The harmonic suppression method based on optical phase shifting according to claim 1, characterized in that: The photoelectric modulation phase compensation device comprises a laser source, an optical beam splitter, a plurality of photoelectric modulation phase compensation paths connected to the optical beam splitter, and a 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 beam combiner are connected in sequence; Among them, 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.

3. The harmonic suppression method based on optical phase shifting according to claim 2, characterized in that: Each of the electro-optical modulation phase compensation paths comprises an electro-optical modulator, a second photodetector and a phase delay device connected in sequence, and the electro-optical modulator, the second photodetector and the phase delay device are all connected to the controller; The electro-optic modulator is connected to the optical beam splitter, and the phase delay device is connected to the optical beam combiner; The determining of the phase compensation parameter of the optoelectronic modulation phase compensation device according to the harmonic information comprises: Determining amplitude information of multiple harmonics generated by the target power converter according to the harmonic information; Determine the phase difference to be compensated of each harmonic according to each amplitude information, each harmonic corresponds to a single photoelectric modulation phase compensation path; For each electro-optical modulation phase compensation path, a voltage parameter applied to the electro-optical modulator is determined according to the phase difference to be compensated, and if the phase offset of the light beam output by the electro-optical modulator does not meet the preset phase offset requirement after the voltage parameter is applied to the electro-optical modulator, an optical path adjustment parameter of the phase retarder is determined according to the phase offset; Determine the phase compensation parameter according to each of the voltage parameters and each of the optical path adjustment parameters; The second light detector is used to detect the phase shift.

4. The harmonic suppression method based on optical phase shifting according to claim 3, 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-optic modulator and a target optical path adjustment parameter of the phase retarder according to 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 path adjustment parameter are used as the adjusted phase compensation parameter.

5. The harmonic suppression method based on optical phase shifting according to claim 4, 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 subharmonics 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.

6. The harmonic suppression method based on optical phase shifting according to claim 5, 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 subharmonics is n is the refractive index of the phase retarder.

7. The harmonic suppression method based on optical phase shifting according to claim 6, characterized in that: Said i The frequency of the subharmonic is equal to the fundamental frequency. i times.

8. 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 an optoelectronic 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 determination 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 compensation electrical signal sent by the first photodetector after the photoelectric modulation phase compensation device outputs a phase compensation optical signal according to the phase compensation parameter, wherein the phase compensation electrical signal is obtained by converting the phase compensation optical signal by the first photodetector; A judging unit, for judging 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 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.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein 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 7 when executing the computer program.

10. 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 7 is implemented.

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