阅读说明：本技术 基于二阶广义积分器的数据采集噪声自适应方法及设备 (Data acquisition noise self-adaption method and device based on second-order generalized integrator ) 是由 高凡 邵雪松 胡江溢 周玉 李悦 蔡奇新 穆卓文 崔高颖 于 2021-11-12 设计创作，主要内容包括：本申请提供一种基于二阶广义积分器的数据采集噪声自适应方法及设备。该方法包括：采集多个频点的电流信号；其中,所述电流信号包括用电信息和通讯信号；对每个所述电流信号进行测试,获得每个所述电流信号的分流比和对应的频点信息；根据所述分流比和所述频点信息选取满足预选原则的电流信号,获得目标电流信号；提取每个所述目标电流信号对应的噪声信号,并根据所述噪声信号确定对应的幅值；根据所述幅值,利用自适应原则确定目标信号频点。本申请实施例中,通过自适应原则,从噪声幅值最小开始,将预设个数的噪声信号对应的频点作为目标信号频点,降低用电信息采集的背景噪声对注入电力系统信号的影响。(The application provides a data acquisition noise self-adaption method and equipment based on a second-order generalized integrator. The method comprises the following steps: collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal; testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information; selecting a current signal meeting a preselection principle according to the shunt ratio and the frequency point information to obtain a target current signal; extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude value according to the noise signal; and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude. In the embodiment of the application, through a self-adaptive principle, the frequency points corresponding to the preset number of noise signals are used as the target signal frequency points from the minimum noise amplitude, so that the influence of the background noise acquired by the power consumption information on the injected power system signal is reduced.)

1. A data acquisition noise self-adaptive method based on a second-order generalized integrator is characterized by comprising the following steps:

collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal;

testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information;

selecting a current signal meeting a preselection principle according to the shunt ratio and the frequency point information to obtain a target current signal;

extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude value according to the noise signal;

and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

2. The method according to claim 1, wherein the selecting a current signal satisfying a preselected principle according to the shunt ratio and the frequency point information to obtain a target current signal comprises:

extracting the current signal of which the shunt ratio meets a first preset threshold value to obtain a first current signal to be detected;

extracting the first current to be detected with the frequency point being even times of industrial frequency according to the frequency point information corresponding to each current to be detected to obtain a second current to be detected;

judging whether the frequency point of each second current to be detected meets a preset frequency point range or not;

and if so, extracting the second current to be detected meeting the preset frequency point range to obtain the target current signal.

3. The method of claim 1, wherein said extracting a noise signal corresponding to each of said target current signals comprises:

and extracting a noise signal of each target current signal through a second-order generalized integrator.

4. The method of claim 3, wherein said extracting the noise signal of each of the target current signals by a second order generalized integrator comprises:

using formulasExtracting a noise signal for each of the target current signals;

wherein the content of the first and second substances,representing the form of an input signal with a frequency point n subjected to a Laplace transform,which is indicative of the control gain, is,which is indicative of the resonant frequency,which is indicative of the complex frequency of the signal,and the target signal with the frequency point n is expressed in a form after Laplace transform.

5. The method of claim 1, wherein determining the corresponding amplitude from the noise signal comprises:

by the formulaExtracting an amplitude of each of the noise signals;

wherein the content of the first and second substances,indicating a frequency point ofThe amplitude of the target current signal of (1);

indicating a frequency point ofOf the target current signal, and；

indicating a frequency point ofOf the imaginary part of the target current signal, and；

a frequency point representing the target current of the current,is the size of the sliding window set, and，for each frequency point of the noise signal and the greatest common divisor of the industrial frequency,which is indicative of the sampling frequency, is,。

6. the method according to claim 1, wherein the determining the frequency point of the target signal by using an adaptive principle according to the amplitude value comprises:

starting from the minimum amplitude, taking target current signals corresponding to a preset number of noise signals as specific current signals;

and determining the target signal frequency point according to the signal frequency point corresponding to the specific current signal.

7. The method of claim 6, further comprising:

and acquiring current signals under the target signal frequency point, and inputting the current signals under the target signal frequency point into a power line for communication.

8. A second-order generalized integrator-based data acquisition noise adaptive device, comprising:

the acquisition module is used for acquiring current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal;

the test module is used for testing each current signal to obtain the shunt ratio of each current signal and corresponding frequency point information;

the selection module is used for selecting current signals meeting a preselection principle according to the shunt ratio and the frequency point information to obtain target current signals;

the amplitude determining module is used for extracting a noise signal corresponding to each target current signal and determining a corresponding amplitude according to the noise signal;

and the frequency point acquisition module is used for determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

9. An electronic device, comprising: a processor and a memory, the memory storing machine-readable instructions executable by the processor, the machine-readable instructions, when executed by the processor, performing the method of any of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing computer instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 7.

Technical Field

The application relates to the field of power line carrier communication, in particular to a data acquisition noise self-adaption method and equipment based on a second-order generalized integrator.

Background

The power grid is a whole formed by a substation with various voltages and a transmission and distribution circuit line in a power system, and comprises power transformation, power transmission and power distribution, and the main task is to transmit and distribute electric energy. At present, in order to reduce the erection and operation costs of communication lines, a scheme for communication by using the existing power line is proposed in the power grid communication technology, and reliable narrowband or broadband communication is realized by means of the power line carrier communication technology.

However, since the power line itself is not a dedicated line created for communication, a strong interference signal and a sudden interference noise exist in the power grid, so that the error rate in the power line is high, the communication environment of the power line itself is also very bad, and the power line is easily affected by the background noise of power consumption information acquisition, so that the information error in the communication process is large, and the communication process is interfered.

Disclosure of Invention

An object of the embodiments of the present application is to provide a second-order generalized integrator-based data acquisition noise adaptive method and device, so as to solve the problem that background noise in a power line in the prior art interferes with communication.

In a first aspect, an embodiment of the present application provides a second-order generalized integrator-based data acquisition noise adaptive method, including: collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal; testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information; selecting current signals meeting a preselection principle according to the shunting condition and the frequency point information to obtain target current signals; extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude value according to the noise signal; and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

In the embodiment of the application, the amplitude of the noise signal is selected through a self-adaptive principle, the corresponding target signal frequency point is determined, and the amplitude of the selected target signal frequency point is small, so that the interference on the transmission of the communication signal is small, and the transmission precision of the communication signal and the adaptability in the communication process are improved.

Optionally, in this embodiment of the application, the selecting, according to the ratio and the frequency point information, a current signal that satisfies a preselected principle to obtain a target current signal includes:

extracting the current signal of which the shunt ratio meets a first preset threshold value to obtain a first current signal to be detected; extracting the first current to be detected with the frequency point being even times of industrial frequency according to the frequency point information corresponding to each current to be detected to obtain a second current to be detected; judging whether the frequency point of each second current to be detected meets a preset frequency point range or not; and if so, extracting the second current to be detected meeting the preset frequency point range to obtain the target current signal.

In the implementation process, the current signal with the shunt ratio meeting the first preset threshold, the frequency point being even times of the industrial frequency and meeting the preset frequency point range is selected as the target current signal, the frequency point corresponding to the current signal with large signal attenuation in the communication process can be filtered, the current signal of the frequency point of odd times is avoided, interference on communication caused by frequency spectrum leakage is avoided, and effectiveness of the selected target current signal is improved.

Optionally, in this embodiment of the application, the extracting a noise signal corresponding to each target current signal includes: and extracting a noise signal of each target current signal through a second-order generalized integrator. Optionally, the extracting, by a second-order generalized integrator, the noise signal of each target current signal includes:

using formulasExtracting a noise signal for each of the target current signals; wherein the content of the first and second substances,representing the form of an input signal with a frequency point n subjected to a Laplace transform,which is indicative of the control gain, is,which is indicative of the resonant frequency,which is indicative of the complex frequency of the signal,and the target signal with the frequency point n is expressed in a form after Laplace transform.

In the implementation process, the noise signal corresponding to the target signal is extracted through the second-order generalized integrator, so that the errors caused by unbalanced grid voltage and the extraction of the noise signal by higher harmonics can be overcome, and the accuracy of the extracted noise signal is improved.

Optionally, in this embodiment of the present application, the determining a corresponding amplitude according to the noise signal includes:

by the formulaExtracting an amplitude of each of the noise signals;

wherein the content of the first and second substances,indicating a frequency point ofTarget electricity ofThe amplitude of the flow signal;

indicating a frequency point ofOf the target current signal, and；indicating a frequency point ofOf the imaginary part of the target current signal, and；a frequency point representing the target current of the current,is the size of the sliding window set, and，for each frequency point of the noise signal and the greatest common divisor of the industrial frequency,which is indicative of the sampling frequency, is,。

in the implementation process, the amplitude of the noise signal is extracted through sliding Fourier transform, the result can be calculated once every time one data is sampled, the analysis result of the harmonic component can be updated at each sampling moment, the influences of load fluctuation and frequency offset can be overcome, and the real-time performance is high.

Optionally, in this embodiment of the present application, the determining, according to the amplitude, a frequency point of a target signal by using an adaptive principle includes: taking a preset number of noise signals as specific current signals from the minimum amplitude; and determining the target signal frequency point according to the signal frequency point corresponding to the specific current signal.

In the implementation process, according to the self-adaptation principle, the target current signals corresponding to the preset number of noise signals are used as specific current signals from the minimum amplitude, and the amplitude of the selected target signal frequency point is small, namely the amplitude of the noise signal corresponding to the target frequency point is small, so that the self-adaptation of the electricity information acquisition background noise can be realized.

Optionally, in an embodiment of the present application, the method further includes: and acquiring current signals under the target signal frequency point, and inputting the current signals under the target signal frequency point into a power line for communication.

In the implementation process, the current signal under the target signal frequency point is input into the power line, and the amplitude of the noise signal corresponding to the selected target signal frequency point is small, so that the influence on the communication signal is small, the problem of interference of background noise on communication can be solved, and the transmission precision of the communication signal is improved.

In a second aspect, an embodiment of the present application provides a second-order generalized integrator-based data acquisition noise adaptive device, including: the acquisition module is used for acquiring current signals of a plurality of frequency points; wherein the current signal comprises an electric signal and a communication signal; the test module is used for testing each current signal to obtain the shunt ratio of each current signal and corresponding frequency point information; the selection module is used for selecting current signals meeting a preselection principle according to the shunt ratio and the frequency point information to obtain target current signals; the amplitude determining module is used for extracting a noise signal corresponding to each target current signal and determining a corresponding amplitude according to the noise signal; and the frequency point acquisition module is used for determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

In a third aspect, an embodiment of the present application provides an electronic device, including: a processor and a memory, the memory storing machine readable instructions executable by the processor, the processor calling the program instructions to be able to perform the method of the first aspect.

In a fourth aspect, an embodiment of the present application provides a non-transitory computer-readable storage medium, including: the non-transitory computer readable storage medium stores computer instructions that cause the computer to perform the method of the first aspect.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic flow chart of a second-order generalized integrator-based data acquisition noise adaptive method according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating the amplitude of a noise signal in a current signal according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a second-order generalized integrator-based data acquisition noise adaptive device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Fig. 1 is a schematic flowchart of a second-order generalized integrator-based data acquisition noise adaptive method according to an embodiment of the present disclosure, and as shown in fig. 1, the method may be applied to a terminal device (also referred to as an electronic device) and a server; the terminal device may be a smart phone, a tablet computer, a Personal Digital Assistant (PDA), or the like; the server may specifically be an application server, and may also be a Web server. The method comprises the following steps:

step 101: collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal.

In a specific implementation process, the target signal can be collected through a programmable logic device, and can also be collected through a collecting device of a current transformer, wherein the input signal is input into an electric power systemFor the signal that contains multiple frequency point, gather the current signal who inputs electric power system, separate the current signal of different frequency points, realize the collection to different frequency point current signals, wherein, the power consumption information includes signal of telecommunication and communication signal, and the signal of telecommunication is outside the electric signal that electric power system carries out transformer, transmission of electricity and distribution, and the background noise that produces in the power consumption information acquisition in-process in addition, communication signal is the signal of telecommunication of carrying out communication and signal transmission in electric power system.

Step 102: and testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information.

The split ratio and the corresponding frequency point information of each current signal can be obtained through experimental analysis, the split ratio and the corresponding frequency point information of each current signal can also be obtained through simulation, the current signals are subjected to simulation test through MATLAB and/or Simulink in the embodiment of the application, the split ratio and the corresponding frequency point information of the current signals are obtained, and the attenuation degree of the current signals can be reflected by the split ratio.

Step 103: and selecting a current signal meeting a preselection principle according to the shunt ratio and the frequency point information to obtain a target current signal.

The current signals transmitted by the power system contain a large number of integral harmonics, spectral lines in a signal frequency spectrum can be influenced mutually, so that a measurement result deviates from an actual value, meanwhile, some false spectrums with smaller amplitudes appear at other frequency points on two sides of the spectral lines, frequency points with odd times of industrial frequency 50Hz are avoided, signals with frequency points being even times of the industrial frequency are selected, and the current signals meeting the preselection principle are used as target current signals.

Step 104: and extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude according to the noise signal.

The noise signal in the current signal can be separated by extracting the noise signal corresponding to the target current signal, so that the direct current component and the higher harmonic in the input signal are inhibited and eliminated, and the amplitude corresponding to the noise signal is calculated, thereby facilitating the subsequent selection of the target signal frequency point.

Step 105: and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

The target signal frequency point is a selected specific signal frequency point which accords with the self-adaptive principle, wherein the signal frequency point corresponding to the noise signal with the smaller amplitude is selected from a plurality of noise signals and is used as the target signal frequency point, the current signal under the target signal frequency point is input into a power line for communication, the communication signal can be ensured to be obtained, the loss of the communication signal is small, the interference of background noise to communication can be reduced, and the precision of signal transmission is improved.

On the basis of the above embodiment, the selecting a current signal satisfying a preselection principle according to the split ratio and the frequency point information to obtain a target current signal includes:

extracting the current signal of which the shunt ratio meets a first preset threshold value to obtain a first current signal to be detected; extracting the first current to be detected with the frequency point being even times of industrial frequency according to the frequency point information corresponding to each current to be detected to obtain a second current to be detected; judging whether the frequency point of each second current to be detected meets a preset frequency point range or not; and if so, extracting the second current to be detected meeting the preset frequency point range to obtain the target current signal.

As an implementation manner, a current signal with a shunt ratio smaller than 0.5 may be extracted as a first current signal to be detected, a signal with a frequency point that is an even multiple of an industrial frequency in the first current signal to be detected is selected, the signal may be a current signal corresponding to a frequency point that meets requirements, such as 200Hz, 300Hz, 500Hz, and the like, the preset frequency point range may be [50Hz, 1000Hz ], a second current to be detected that meets [50Hz, 1000Hz ] is used as a target current signal, in an actual application, the preset frequency point range may be set according to an actual need, which is not specifically limited in this application.

By the aid of the preselection principle, the problems of frequency spectrum leakage and serious signal attenuation can be solved, and effectiveness of selecting the selected target current signal is improved.

On the basis of the above embodiment, extracting a noise signal corresponding to each target current signal includes: extracting a noise signal of each target current signal through a second-order generalized integrator;

using formulasExtracting a noise signal for each of the target current signals;

wherein the content of the first and second substances,representing the form of an input signal with a frequency point n subjected to a Laplace transform,which is indicative of the control gain, is,which is indicative of the resonant frequency,which is indicative of the complex frequency of the signal,and the target signal with the frequency point n is expressed in a form after Laplace transform.

According to the embodiment of the application, the target signal with the frequency point n can be obtained through the formula and subjected to Laplace transform, and the time domain expression of the noise signal can be obtained by performing Laplace inverse transform on the target signal after the target signal is obtained through the Laplace transform.

The noise signal in the target current signal is extracted through the second-order generalized integrator, the second-order generalized integrator can be a second-order generalized integrator based on a frequency locking loop, the filtering capacity of the direct current component in the voltage signal can be improved, the direct current component and the higher harmonic in the input signal are restrained and eliminated, meanwhile, the phase locking precision when the input signal contains the direct current component is improved, and the harmonic filtering capacity is better.

On the basis of the above embodiment, said determining the corresponding amplitude according to the noise signal includes:

by the formulaExtracting an amplitude of each of the noise signals;

wherein the content of the first and second substances,indicating a frequency point ofThe amplitude of the target current signal of (1);

indicating a frequency point ofOf the target current signal, and；

indicating a frequency point ofOf the imaginary part of the target current signal, and；

a frequency point representing the target current of the current,is the size of the sliding window set, and，for each frequency point of the noise signal and the greatest common divisor of the industrial frequency,which is indicative of the sampling frequency, is,。

in the embodiment of the present application, by setting the size of the sliding window, the amplitude may be calculated every other sliding window, and the real-time performance of the data is high, where the industrial frequency is a rated frequency adopted by power generation, power transmission and distribution equipment of a power system and industrial and civil electrical equipment, and a power frequency of 50Hz is adopted here, and in an actual application, the power frequency may also be set according to an actual need, which is not specifically limited in the embodiment of the present application.

The amplitude of the noise signal is extracted through sliding Fourier transform, short-time Fourier transform including forward transform and inverse transform is realized through sliding and iteration, and through iterative calculation, the calculation amount can be greatly reduced, and the influences of load fluctuation and frequency offset of current are overcome.

On the basis of the foregoing embodiment, determining a target signal frequency point by using an adaptive principle according to the amplitude includes: starting from the minimum amplitude, taking target current signals corresponding to a preset number of noise signals as specific current signals; and determining the target signal frequency point according to the signal frequency point corresponding to the specific current signal.

In this embodiment of the application, the preset number may be one or multiple, when the preset number may be one, that is, the frequency point of the noise signal with the smallest amplitude is selected as the target signal frequency point, and if the preset number may be multiple, for example, the preset number is 5, the noise signals may be sorted according to the amplitudes from large to small, and the noise signals with the inverse number of 5 are used as the specific current signals. Therefore, the maximum value of the preset number should be less than or equal to the number of noise signals.

On the basis of the above embodiment, the method further includes: and acquiring current signals under the target signal frequency point, and inputting the current signals under the target signal frequency point into a power line for communication. For example, the selected frequency point is 200Hz as a target signal frequency point, and a current signal at the frequency point of 200Hz is input into a power line for communication, so that a communication signal can be ensured to be obtained, and interference of background noise on communication is reduced to the minimum.

As an embodiment, 5 current signal shunt ratios and corresponding frequency point information are obtained through testing, wherein the current signal shunt ratio of a 200Hz frequency point is 0.4, the current signal shunt ratio of a 300Hz frequency point is 0.45, the current signal shunt ratio of a 500Hz frequency point is 0.47, the current signal shunt ratio of a 800Hz frequency point is 0.8, and the current signal shunt ratio of a 900Hz frequency point is 0.85.

Selecting current signals corresponding to 200Hz, 300Hz and 500Hz as target current signals according to a preselection principle, and extracting the amplitude of the noise signal corresponding to the current signals to obtain the noise signal with the amplitude of 0.65 corresponding to the current signal with the frequency point of 200Hz, the noise signal with the amplitude of 0.35 corresponding to the current signal with the frequency point of 300Hz and the noise signal with the amplitude of 0.8 corresponding to the current signal with the frequency point of 500 Hz.

According to the self-adaptive principle, 300Hz with the minimum noise amplitude is selected as a target signal frequency point, and experiments show that when a current signal under the 300Hz frequency point is input into a power line for communication, the communication signal can be ensured to be obtained, and the amplitude of the obtained communication signal is between 0.6 and 0.7, which shows that the selection of the injection signal frequency point can achieve the expected effect.

Fig. 2 is a schematic view of an amplitude of a noise signal in a current signal provided in this embodiment, it can be obtained that a noise amplitude of the current signal when a frequency point is 50Hz is 25A, a noise amplitude of the current signal when the frequency point is 150Hz is 22A, a noise amplitude of the current signal when the frequency point is 250Hz is 7.5A, a noise amplitude of the current signal when the frequency point is 350Hz is 6A, a noise amplitude of the current signal when the frequency point is 450Hz is 2A, a noise amplitude of the current signal when the frequency point is 550Hz is 3A, a noise amplitude of the current signal when the frequency point is 650Hz is 3A, and a noise amplitude of the current signal even-order power frequency is almost lower than 2A, so that a first to-be-detected current whose frequency point is even-order times of an industrial frequency is extracted when a frequency point of a target signal is selected, and interference of background noise on communication is reduced.

Fig. 3 is a schematic structural diagram of a second-order generalized integrator-based data acquisition noise adaptive device according to an embodiment of the present application, where the device may be a module, a program segment, or code on an electronic device. It should be understood that the apparatus corresponds to the above-mentioned embodiment of the method of fig. 1, and can perform various steps related to the embodiment of the method of fig. 1, and the specific functions of the apparatus can be referred to the description above, and the detailed description is appropriately omitted here to avoid repetition. The apparatus comprises: the device comprises an acquisition module 201, a test module 202, a selection module 203, an amplitude determination module 204 and a frequency point acquisition module 205, wherein:

the acquisition module 201 is configured to acquire current signals of multiple frequency points; wherein the current signal comprises power utilization information and a communication signal; the test module 202 is configured to test each current signal to obtain a shunt ratio of each current signal and corresponding frequency point information; a selecting module 203, configured to select a current signal meeting a preselection principle according to the shunt ratio and the frequency point information, and obtain a target current signal; an amplitude determining module 204, configured to extract a noise signal corresponding to each target current signal, and determine a corresponding amplitude according to the noise signal; and a frequency point obtaining module 205, configured to determine a frequency point of the target signal according to the amplitude value by using a self-adaptive principle.

On the basis of the above embodiment, the selecting module 203 is specifically configured to:

extracting the current signal of which the shunt ratio meets a first preset threshold value to obtain a first current signal to be detected; extracting the first current to be detected with the frequency point being even times of industrial frequency according to the frequency point information corresponding to each current to be detected to obtain a second current to be detected; judging whether the frequency point of each second current to be detected meets a preset frequency point range or not; and if so, extracting the second current to be detected meeting the preset frequency point range to obtain the target current signal.

On the basis of the foregoing embodiment, the amplitude determination module 204 is specifically configured to:

and extracting a noise signal of each target current signal through a second-order generalized integrator.

Using formulasExtracting a noise signal for each of the target current signals;

wherein the content of the first and second substances,representing the form of an input signal with a frequency point n subjected to a Laplace transform,which is indicative of the control gain, is,which is indicative of the resonant frequency,which is indicative of the complex frequency of the signal,and the target signal with the frequency point n is expressed in a form after Laplace transform.

On the basis of the foregoing embodiment, the amplitude determination module 204 is specifically configured to:

by the formulaExtracting an amplitude of each of the noise signals;

wherein the content of the first and second substances,indicating a frequency point ofThe amplitude of the target current signal of (1);

indicating a frequency point ofOf the target current signal, and；

indicating a frequency point ofOf the imaginary part of the target current signal, and；

a frequency point representing the target current of the current,is the size of the sliding window set, and，for each frequency point of the noise signal and the greatest common divisor of the industrial frequency,which is indicative of the sampling frequency, is,。

on the basis of the foregoing embodiment, the frequency point obtaining module 205 is specifically configured to:

starting from the minimum amplitude, taking the target current signals corresponding to a preset number of noise signals as specific current signals;

and determining the target signal frequency point according to the signal frequency point corresponding to the specific current signal.

On the basis of the above embodiment, the apparatus further includes a signal input module, specifically configured to:

and acquiring current signals under the target signal frequency point, and inputting the current signals under the target signal frequency point into a power line for communication.

To sum up, in the embodiment of the application, at first select the target signal through the preselection principle, can filter the frequency point that the current signal that signal attenuation is big corresponds in communication process, avoid the current signal of odd number frequency point simultaneously, avoid the frequency spectrum leakage to cause the interference to communication, improve the validity of the target current signal who selects, select the amplitude of noise signal through the self-adaptation principle, confirm the corresponding target signal frequency point, the target signal frequency point amplitude of selecting is little, little to communication signal's transmission interference, improve communication signal transmission's precision and the fitness in communication process.

Fig. 4 is a schematic structural diagram of an entity of an electronic device provided in an embodiment of the present application, and as shown in fig. 4, the electronic device includes: a processor (processor)301, a memory (memory)302, and a bus 303; wherein:

the processor 301 and the memory 302 complete communication with each other through the bus 303;

the processor 301 is configured to call program instructions in the memory 302 to perform the methods provided by the above-mentioned method embodiments, including: collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal; testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information; selecting a current signal meeting a preselection principle according to the shunt ratio and the frequency point information to obtain a target current signal; extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude value according to the noise signal; and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

The processor 301 may be an integrated circuit chip having signal processing capabilities. The Processor 301 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. Which may implement or perform the various methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The Memory 302 may include, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read Only Memory (PROM), Erasable Read Only Memory (EPROM), Electrically Erasable Read Only Memory (EEPROM), and the like.

The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal; testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information; selecting a current signal meeting a preselection principle according to the shunt ratio and the frequency point information to obtain a target current signal; extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude value according to the noise signal; and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

Embodiments of the present application provide a non-transitory computer-readable storage medium storing computer instructions, which cause the computer to perform the method provided by the above method embodiments, for example, including: collecting current signals of a plurality of frequency points; wherein the current signal comprises power utilization information and a communication signal; testing each current signal to obtain the split ratio of each current signal and corresponding frequency point information; selecting a current signal meeting a preselection principle according to the shunt ratio and the frequency point information to obtain a target current signal; extracting a noise signal corresponding to each target current signal, and determining a corresponding amplitude value according to the noise signal; and determining the frequency point of the target signal by using a self-adaptive principle according to the amplitude.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.