CN117691600A - Harmonic voltage management device, control method, system, equipment and medium - Google Patents
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Abstract
The application relates to a harmonic voltage management device, a control method, a system, equipment and a medium, which belong to the technical field of harmonic voltage optimization control and comprise a load transformer, a transformation control device, an inverter, a controller and a voltage compensation amount detection device; one end of the inverter is connected with the voltage transformation control equipment, the other end of the inverter is connected with the controller, and the inverter is used for outputting harmonic voltage; one end of the load transformer is connected with a load, and the other end of the load transformer is connected with the transformation control equipment; the transformation control device is used for controlling the secondary side short circuit of the load transformer when the load fails; one end of the voltage compensation quantity detection device is connected with the common connection end of the load transformer and the load, and the other end of the voltage compensation quantity detection device is connected with the controller and is used for outputting harmonic signals; the controller is used for outputting compensation voltage corresponding to the harmonic signal according to the harmonic signal. The application promotes the treatment effect of harmonic waves.
Description
Technical Field
The application relates to the technical field of harmonic voltage optimization control, in particular to a harmonic voltage management device, a control method, a system, equipment and a medium.
Background
With the development of power electronics technology, various power electronics devices such as frequency converters, switching power supplies, uninterruptible power supplies (uninterruptible power supply, UPS) and electronic ballasts are increasingly applied, and harmonic pollution of the power grid generated by the power electronics devices attracts attention. The direct current side of the rectifying circuit of the power electronic device is filtered by adopting a large capacitor, so that the power electronic device essentially belongs to a voltage source type harmonic source, under the action of the harmonic voltage source, the waveform of the input current of the alternating current side of the power electronic device is severely distorted, a large amount of harmonic current is injected into a power grid, and serious harmonic pollution is brought to a power system.
At present, a common harmonic wave treatment method comprises a main loop series reactor, and energy of harmonic wave voltage is compensated through reactance impedance, but the method has limited low harmonic wave inhibition capability and has an unobvious effect. The capacitor and the reactor can be connected in parallel after being connected in series to form a passive filter loop, so that the harmonic wave can be treated, but the harmonic wave can be treated only for a certain first harmonic current, the system resonance is easy to occur, and the improvement effect is limited.
The related technical scheme has the following defects: the treatment effect on the harmonic wave is limited.
Disclosure of Invention
In order to improve the harmonic treatment effect, the application provides a harmonic voltage treatment device, a control method, a system, equipment and a medium.
In a first aspect of the present application, a harmonic voltage remediation device is provided. The device comprises a load transformer, a transformation control device, an inverter, a controller and a voltage compensation amount detection device;
one end of the inverter is connected with the voltage transformation control equipment, the other end of the inverter is connected with the controller, and the inverter is used for outputting harmonic voltage;
one end of the load transformer is connected with a load, and the other end of the load transformer is connected with the transformation control equipment;
a transformation control device for controlling a secondary side short circuit of the load transformer when the load fails;
one end of the voltage compensation quantity detection device is connected with the common connection end of the load transformer and the load, and the other end of the voltage compensation quantity detection device is connected with the controller and is used for outputting harmonic signals;
the controller is used for outputting compensation voltage corresponding to the harmonic signal according to the harmonic signal.
According to the technical scheme, the voltage compensation quantity detection equipment is used for detecting harmonic signals in the circuit and inputting the detected harmonic signals into the controller, the controller can analyze the harmonic signals to obtain compensation voltages corresponding to the harmonic signals, the controller further controls the inverter to output the harmonic voltages to complete compensation of the harmonic signals, the harmonic voltages passing through the voltage transformation control equipment are converted and flow into a load through the load transformer, the effect of managing the harmonic waves in the circuit is achieved, meanwhile, the voltage compensation quantity detection equipment in the circuit is used for detecting the harmonic waves in real time, implementation management of the harmonic waves is achieved, and the management effect of the harmonic waves is improved.
In one possible implementation, the apparatus further comprises a rectifying device connected to the inverter for providing energy support for the inverter.
In one possible implementation, the voltage compensation amount detection device is a comparator, a first input end of the comparator is connected with the load transformer, a second input end of the comparator is connected with an output end of the comparator, and an output end of the comparator is connected with the controller.
According to the technical scheme, the voltage compensation quantity detection equipment is used for realizing real-time detection of the harmonic wave in the circuit, a foundation is provided for real-time harmonic wave treatment, and further the improvement of the harmonic wave treatment effect can be realized.
In one possible implementation, the apparatus further comprises a power supply and a power transformer, the power supply being connected to the rectifier and the load transformer, respectively, through the power transformer.
In one possible implementation, the inverter is a three-phase four-leg inverter.
In a second aspect of the present application, a harmonic voltage remediation control method is provided. The method comprises the following steps:
the controller acquires a harmonic signal output by the voltage compensation amount detection equipment;
analyzing the harmonic signals to obtain voltage amplitude values corresponding to harmonic frequencies and harmonic frequencies;
and determining the compensation voltage corresponding to the voltage amplitude according to the voltage amplitude corresponding to the harmonic frequency.
In one possible implementation, the harmonic order and the voltage amplitude corresponding to the harmonic order are obtained by fourier transformation or rotational coordinate transformation.
In a third aspect of the present application, a harmonic voltage remediation control system is provided. The system comprises:
the signal acquisition module is used for acquiring harmonic signals output by the voltage compensation amount detection equipment;
the signal analysis module is used for analyzing the harmonic signals to obtain voltage amplitude values corresponding to harmonic frequencies and harmonic frequencies;
and the compensation determining module is used for determining compensation voltage corresponding to the voltage amplitude according to the voltage amplitude corresponding to the harmonic frequency.
In a fourth aspect of the present application, an electronic device is provided. The electronic device includes: a memory and a processor, the memory having stored thereon a computer program, the processor implementing the method as described above when executing the program.
In a fifth aspect of the present application, there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method as according to the second aspect of the present application.
In summary, the present application includes at least one of the following beneficial technical effects:
the voltage compensation quantity detection equipment is used for detecting harmonic signals in the circuit and inputting the detected harmonic signals into the controller, the controller can analyze the harmonic signals to obtain compensation voltages corresponding to the harmonic signals, the controller further controls the inverter to output harmonic voltages to complete compensation of the harmonic signals, the harmonic voltages which pass through the voltage transformation control equipment are converted to flow into a load through the load transformer, the effect of managing the harmonic waves in the circuit is achieved, meanwhile, the voltage compensation quantity detection equipment in the circuit is used for detecting the harmonic waves in real time, further implementation management of the harmonic waves is achieved, and the management effect of the harmonic waves is improved.
Drawings
Fig. 1 is a block diagram of a harmonic voltage treatment apparatus according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a harmonic voltage treatment device according to an embodiment of the present application.
Fig. 3 is a schematic flow chart of a harmonic voltage treatment control method according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a harmonic voltage management control system according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
In the figure, 1, a load transformer; 2. a variable-voltage control device; 3. an inverter; 4. a controller; 5. a voltage compensation amount detection device; 6. a rectifying device; 7. a power supply transformer; 8. a power supply; 9. a load; 201. a signal acquisition module; 202. a signal analysis module; 203. a compensation determination module; 301. a CPU; 302. a ROM; 303. a RAM; 304. an I/O interface; 305. an input section; 306. an output section; 307. a storage section; 308. a communication section; 309. a driver; 310. removable media.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, unless otherwise specified, the term "/" generally indicates that the associated object is an "or" relationship.
With the development of power electronic technology, a large number of electric devices which are composed of power electronic switches and have nonlinear characteristics are widely applied to the fields of metallurgy, steel, traffic, chemical industry, electrified railways, electric power systems, photovoltaic grid connection and the like, such as electrolytic devices, electric locomotives, rolling machines, high-frequency furnaces and the like, and the use of the electric devices makes harmonic pollution conditions in power grids increasingly serious. Various power switching devices and other nonlinear loads used in the power distribution network facilitate the conversion of electric energy, but a large amount of harmonic current is injected into the power grid, so that the safe operation and normal use of the power grid and electrical equipment are seriously threatened. Higher harmonics in the power grid can cause overheating of the rotating electrical machine and the transformer, causing the power capacitor bank to work abnormally and even causing thermal breakdown damage. The system can also generate great harm to a generator, a camera, a relay protection automatic device, electric energy metering and the like in the power system, and can cause misoperation when serious, thereby causing serious accidents. The harmonic pollution has different degrees of interference on electric equipment such as communication, computer systems, high-precision processing machinery, detection instruments and the like. Some effective measures are needed to mitigate or eliminate harmonics in the power grid.
Because of the frequent use of a large number of nonlinear loads such as rectifiers, frequency converters and the like, harmonic pollution in the power system in China is extremely serious, bad influence exists on the daily operation of the power system and related power equipment, harmonic voltage is deteriorated due to harmonic current, the service life of the equipment is reduced, and overvoltage damage often occurs.
The current method for controlling the harmonic wave comprises the following steps:
1. connecting the reactors in series into a power grid
The reactors with higher reactance rate are selected by connecting the reactors in series in the main loop, and the energy of the harmonic voltage is prevented from changing by the reactors. The impedance of the reactor is xl=wl=2pi fL, and the impedance increases with increasing frequency.
2. The capacitor and the reactor are connected in series and then connected in parallel to the power grid
The compensation capacitor and the filter reactor are the most common reactive compensation collocation with high cost performance, and the series reactance at the front section of the capacitor can form a passive filter loop. The harmonic frequency of the power grid is used for selecting filter reactors with different reactance ratios, and compensation of harmonic voltage can be realized by matching with compensation capacitors with corresponding voltage grades.
3. The active filters are connected in parallel to the power grid
Although both the reactor and the active filter have the effect of filtering out harmonics, the active filter has different properties from the reactor. The active filter belongs to power electronic equipment, and the harmonic current content of the power grid is detected and analyzed through a current operation circuit, so that compensation current which can offset the harmonic current content is emitted.
In the first mode, the size and cost of the reactor increase with the increase of the load current, and the suppression capability of the low-order harmonics is limited, and the effect is not obvious. The second mode indirectly improves the harmonic voltage by reducing the harmonic current, the method also needs to consider the background harmonic voltage, namely all branches need to be connected with a capacitor reactance to absorb the harmonic current so as to improve the harmonic voltage, and in addition, the passive filter loop can only treat certain first harmonic current, system resonance is easy to occur, and the improvement effect is not obvious. The third mode is to realize the optimization of the harmonic voltage by improving the form of the harmonic current, but the method has certain disadvantages that when the background harmonic voltage is lower than the national standard, all branch circuits need to be treated, i.e. a large number of active filters are needed, and if the background harmonic voltage exceeds the national standard, the harmonic voltage of a new branch circuit cannot be controlled below the national standard.
The embodiment of the application provides a harmonic voltage treatment device, which can directly compensate harmonic waves without considering harmonic current and background harmonic voltage, and reduces cost while meeting the requirement of a new load on electric energy quality, and controls the voltage distortion rate of a load side within a range less than 1%.
Embodiments of the present application are described in further detail below with reference to the drawings attached hereto.
The embodiment of the application provides a harmonic voltage treatment device, referring to fig. 1 and 2, the harmonic voltage treatment device comprises a load transformer 1, a transformation control device 2, an inverter 3, a controller 4 and a voltage compensation amount detection device 5; one end of the inverter 3 is connected with the transformation control device 2, the other end is connected with the controller 4, and the inverter 3 is used for outputting harmonic voltage; one end of the load transformer 1 is connected with a load 9, and the other end is connected with the transformation control equipment 2; the transformation control device 2 is used for controlling the secondary side short circuit of the load transformer 1 when the load 9 fails; one end of the voltage compensation amount detection device 5 is connected with a connection common end of the load transformer 1 and the load 9, and the other end is connected with the controller 4 and is used for outputting harmonic signals; the controller 4 is configured to output a compensation voltage corresponding to the harmonic signal based on the harmonic signal.
In the embodiment provided by the application, the inverter 3 is a three-phase four-leg inverter 3, outputs a harmonic voltage with controllable closed loop, and the N leg provides a stable midpoint potential. The transformation control device 2 can control the secondary side short circuit of the load transformer 1 when the load 9 is short-circuited or the device is in fault, so as to prevent the device from being damaged by high voltage. In a specific example, the occurrence of a short circuit or a device failure of the load 9 may be determined by a current and/or a voltage, and when the value of the current and/or the voltage passing through the load 9 is not within a preset value, the load 9 is considered to be in a short circuit or a device failure.
The load transformer 1 is a single-phase transformer, the transformation ratio, that is, the ratio between the input terminal voltage and the output terminal voltage is K, and when the specific subharmonic voltage on the network side is m, the controller 4 controls the inverter 3 to output the same-frequency inverted voltage, that is, the compensation voltage corresponding to the harmonic signal, with the amplitude of m×k.
The harmonic voltage management device further comprises a rectifying device 6, wherein the rectifying device 6 is connected with the inverter 3 and is used for providing energy support for the inverter 3.
The rectifying device 6 can be a multi-pulse rectifying device, such as a 36-pulse rectifier, which can reduce the harmonic current at the network side and the voltage of Udc isThe above-mentioned rectifying device 6 may also be a pulse width modulated (pulse width modulation, PWM) rectifying means, where the Udc voltage may be set to any value, for example Udc 700V, providing energy support for the inverter 3.
It should be understood that in the rectifier transformer, the primary side is called the network side and the secondary side is called the valve side. The net side current is the primary side current and the valve side current is the secondary side current.
The voltage compensation amount detecting device 5 is a comparator, a first input terminal of the comparator is connected to the load transformer 1, a second input terminal of the comparator is connected to an output terminal of the comparator, and an output terminal of the comparator is connected to the controller 4. In other embodiments, the detection of the voltage compensation amount may be implemented using other circuit configurations or devices, which are not limited herein.
The harmonic voltage management device further comprises a power supply 8 and a power supply transformer 7, wherein the power supply 8 is respectively connected with the rectifier and the load transformer 1 through the power supply transformer 7.
By using the power supply transformer 7, the same power supply 8 can be adapted to harmonic voltage treatment devices of different parameters.
The harmonic voltage treatment device does not need to carry out large-scale transformation on an original circuit structure, does not need to treat harmonic voltage in an indirect mode, can directly treat the harmonic voltage, and achieves the effect of controllable harmonic voltage distortion rate. For the sensitive load 9 newly connected into the power grid system, the power grid with high background harmonic voltage can be directly connected into the harmonic voltage treatment device, so that the purpose of protecting the sensitive load 9 is achieved.
The embodiment of the application provides a harmonic voltage management control method, and the main flow of the method is described as follows.
As shown in fig. 3:
step S101: the controller 4 acquires the harmonic signal output from the voltage compensation amount detection device 5.
Step S102: and analyzing the harmonic signals to obtain voltage amplitude values corresponding to the harmonic frequencies and the harmonic frequencies.
Specifically, the harmonic frequency and the voltage amplitude corresponding to the harmonic frequency are obtained by fourier transform or rotational coordinate transform. In a specific example, maxwell electromagnetic field theory is the basis for studying electromagnetic field law, and fourier transform is an important tool for analyzing signal spectrum. First, according to the Maxwell equation set, it is possible toAnd obtaining a propagation equation of the electromagnetic wave. In the above propagation equation, the electromagnetic field may be decomposed into a superposition of fundamental and harmonic waves. The fundamental wave is the lowest frequency component, while the harmonics are components of integer multiples of the fundamental frequency. Therefore, if it is desired to obtain the harmonic amplitude of a certain frequency, the electromagnetic field component corresponding to the frequency can be solved through the Maxwell equation set, and then fourier transformation is performed. For example, to obtain the amplitude of the nth harmonic, the electromagnetic field in the Maxwell equation set is decomposed into fundamental and harmonic components, and then represented in complex form, i.e.WhereinRepresenting the complex amplitude of the light,is the angular frequency, the fourier transform of the electromagnetic field is:；
based on the nature of the Fourier transform, the method in the above formulaExpressed as:；
wherein,t is a period. Therefore, the frequency can be obtained by solving the Maxwell equation setAnd then fourier transformed, the amplitude of the nth harmonic is obtained.
In other embodiments, other methods may be used to obtain the harmonic order and the voltage amplitude corresponding to the harmonic order, which is not limited herein.
Step S103: and determining the compensation voltage corresponding to the voltage amplitude according to the voltage amplitude corresponding to the harmonic frequency.
According to the harmonic voltage management control method, voltage harmonic waves on the side of a load 9 are collected through the voltage compensation quantity detection device 5 and the controller 4, the amplitude of the voltage of each harmonic frequency is obtained through Fourier transformation or rotation coordinate transformation calculation, the controller 4 sends a control modulation command to the inverter 3 to output the voltage amplitude of each harmonic frequency, the process of outputting the voltage amplitude of each harmonic frequency according to the control modulation command is a circulating process, namely the voltage compensation quantity detection device 5 detects the voltage harmonic waves in real time, and the controller 4 controls the inverter 3 to output corresponding compensation voltage in real time, so that closed-loop control is achieved. The closed loop control can adopt single harmonic voltage repetition control or proportional resonance control strategy or proportional integral control after rotation coordinate transformation. The method can adjust the harmonic voltage distortion rate from 20% to below 1%.
The embodiment of the application provides a harmonic voltage governance control system, referring to fig. 4, the harmonic voltage governance control system includes:
a signal acquisition module 201 for acquiring the harmonic signal output from the voltage compensation amount detection device 5;
the signal analysis module 202 is configured to analyze the harmonic signal to obtain a voltage amplitude corresponding to the harmonic frequency and the harmonic frequency;
the compensation determining module 203 is configured to determine a compensation voltage corresponding to the voltage amplitude according to the voltage amplitude corresponding to the harmonic frequency.
It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to the corresponding process in the foregoing method embodiment for the specific working process of the described module, which is not described herein again.
The embodiment of the application discloses electronic equipment. Referring to fig. 5, the electronic apparatus includes a central processing unit (central processing unit, CPU) 301 that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 302 or a program loaded from a storage section 307 into a random access memory (random access memory, RAM) 303. In the RAM 303, various programs and data required for the system operation are also stored. The CPU 301, ROM 302, and RAM 303 are connected to each other by a bus. An input/output (I/O) interface 304 is also connected to the bus.
The following components are connected to the I/O interface 304: an input section 305 including a keyboard, a mouse, and the like; an output section 306 including a Cathode Ray Tube (CRT), a liquid crystal display (liquid crystal display, LCD), and the like, and a speaker, and the like; a storage portion 307 including a hard disk and the like; and a communication section 308 including a network interface card such as a local area network (local area network, LAN) card, a modem, or the like. The communication section 308 performs communication processing via a network such as the internet. A driver 309 is also connected to the I/O interface 304 as needed. A removable medium 310 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed on the drive 309 as needed, so that a computer program read out therefrom is installed into the storage section 307 as needed.
In particular, according to embodiments of the present application, the process described above with reference to flowchart fig. 3 may be implemented as a computer software program. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a machine-readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such embodiments, the computer program may be downloaded and installed from a network via the communication portion 308, and/or installed from the removable media 310. The above-described functions defined in the apparatus of the present application are performed when the computer program is executed by a Central Processing Unit (CPU) 301.
It should be noted that the computer readable medium shown in the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (erasable programmable read only memory, EPROM), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, radio Frequency (RF), and the like, or any suitable combination of the foregoing.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the application referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or their equivalents is possible without departing from the spirit of the application. Such as the above-mentioned features and the technical features having similar functions (but not limited to) applied for in this application are replaced with each other.
Claims (10)
1. The harmonic voltage management device is characterized by comprising a load transformer (1), a transformation control device (2), an inverter (3), a controller (4) and a voltage compensation amount detection device (5);
one end of the inverter (3) is connected with the transformation control equipment (2), the other end of the inverter is connected with the controller (4), and the inverter (3) is used for outputting harmonic voltage;
one end of the load transformer (1) is connected with a load (9), and the other end of the load transformer is connected with the transformation control equipment (2);
the transformation control device (2) is used for controlling the secondary side short circuit of the load transformer (1) when the load (9) fails;
one end of the voltage compensation quantity detection device (5) is connected with a connection common end of the load transformer (1) and the load (9), and the other end of the voltage compensation quantity detection device is connected with the controller (4) and is used for outputting harmonic signals;
the controller (4) is used for outputting compensation voltage corresponding to the harmonic signal according to the harmonic signal.
2. Harmonic voltage remediation device according to claim 1, characterized in that the device further comprises a rectifying means (6), the rectifying means (6) being connected to the inverter (3) for providing energy support for the inverter (3).
3. The harmonic voltage harnessing apparatus according to claim 1, wherein the voltage compensation amount detection device (5) is a comparator, a first input end of the comparator is connected to the load transformer (1), a second input end of the comparator is connected to an output end of the comparator, and an output end of the comparator is connected to the controller (4).
4. Harmonic voltage management device according to claim 1, characterized in that the device further comprises a power supply (8) and a power transformer (7), the power supply (8) being connected to the rectifier and the load transformer (1) respectively via the power transformer (7).
5. The harmonic voltage management device according to claim 1, wherein the inverter (3) is a three-phase four-leg inverter (3).
6. A harmonic voltage management control method, characterized by being applied to the harmonic voltage management device according to any one of claims 1 to 5, comprising:
the controller (4) acquires harmonic signals output by the voltage compensation amount detection equipment (5);
analyzing the harmonic signals to obtain harmonic frequencies and voltage amplitudes corresponding to the harmonic frequencies;
and determining a compensation voltage corresponding to the voltage amplitude according to the voltage amplitude corresponding to the harmonic frequency.
7. The harmonic voltage remediation control method of claim 6, wherein the harmonic order and the voltage amplitude corresponding to the harmonic order are obtained by fourier transform or rotational coordinate transform.
8. A harmonic voltage remediation control system, comprising:
the signal acquisition module is used for acquiring harmonic signals output by the voltage compensation quantity detection equipment (5);
the signal analysis module is used for analyzing the harmonic signals to obtain harmonic frequencies and voltage amplitudes corresponding to the harmonic frequencies;
and the compensation determining module is used for determining compensation voltage corresponding to the voltage amplitude according to the voltage amplitude corresponding to the harmonic frequency.
9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program capable of being loaded by the processor and performing the method according to any of claims 6 to 7.
10. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any of claims 6 to 7.
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2024
- 2024-02-01 CN CN202410138577.2A patent/CN117691600A/en active Pending
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