Distribution network area intelligent equipment authentication method and configuration terminal

Abstract

The invention discloses a distribution network area intelligent equipment authentication method and a configuration terminal, and the method comprises the steps: calculating a target signal and an authentication signal according to a management password of distribution network area intelligent equipment, an area number and the noise of a distribution transformer during registration, playing the authentication signal, and collecting a mixed signal containing the authentication signal and the noise of the distribution transformer; calculating a difference value between the mixed signal and the target signal as registration information; the method comprises the following steps: during authentication, acquiring a transformer area number of a distribution network transformer area, playing an authentication signal, collecting a mixed signal containing the authentication signal and distribution transformer noise, correcting the mixed signal by using registration information, and calculating according to the distribution transformer noise and the corrected mixed signal to obtain the transformer area number and a management password. And if the transformer area number is consistent with the transformer area number of the to-be-authenticated distribution network transformer area, using the management password to log in the intelligent equipment of the to-be-authenticated distribution network transformer area to carry out operation and maintenance work. According to the invention, a universal, convenient and efficient solution can be provided for legality verification of the intelligent equipment in the distribution network area in a complex power environment.

Description

Technical Field

[0001] The present invention relates to smart grid technology, and in particular to a distribution network area smart device authentication method and a configuration terminal. Background Art

[0002] The construction of smart grid is a key strategic deployment in the construction of new power system in my country, and its core lies in promoting the transformation of power infrastructure production mode. As an important part of smart grid, intelligent distribution network is particularly important, and Internet of Things technology has become an important means to accelerate this process. However, due to the extensiveness, comprehensive perception, reliable transmission and intelligent processing of the Internet of Things network, distribution network intelligent devices face more severe security challenges. To ensure the security of distribution network intelligent devices, one of the basic mechanisms is to verify the legitimacy of the device to confirm the identity of the distribution Internet of Things entity and control its access rights. Therefore, in the development of smart grid, how to effectively verify the legitimacy of the configuration terminal has become an urgent problem to be solved, which is directly related to the security and reliability of distribution network intelligence. Summary of the invention

[0003] The technical problem to be solved by the present invention is as follows: In view of the above-mentioned problems in the prior art, a method for authenticating intelligent devices in a distribution network substation and a configuration terminal are provided, which can provide a universal, convenient and efficient solution for the legitimacy verification of intelligent devices in a distribution network substation in a complex power environment.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A method for authenticating intelligent devices in a distribution network area, applied to a configuration terminal, comprises the following steps: Obtain the first management password and the corresponding first area number of the distribution network area intelligent device; Collect the noise of the first distribution transformer in the distribution network area, calculate the target signal according to the first management password, the first area number and the noise of the first distribution transformer, and subtract the noise from the target signal to obtain the authentication signal; Playing an authentication signal and collecting a first mixed signal including the played authentication signal and noise from a first distribution transformer, and calculating a difference between the first mixed signal and a target signal as registration information; Get the area number of the distribution network area to be authenticated; Play the authentication signal and collect a second mixed signal including the played authentication signal and the noise of the second distribution transformer in the distribution network area to be authenticated, and use the registration information to correct the second mixed signal; The noise of the second distribution transformer in the distribution network area to be authenticated is collected, and the second area number and the second management password are calculated based on the corrected second mixed signal and the second distribution transformer noise. If the second area number is consistent with the area number of the distribution network area to be authenticated, the second management password is used to log in to the intelligent device of the distribution network area to be authenticated for operation and maintenance.

[0005] Further, when the target signal is calculated according to the first management password, the first area number and the first distribution transformer noise, the following steps are included: Convert the first management password and the first station area number into corresponding coding sequences respectively, and obtain the length of the converted coding sequence of the first management password and the length of the encoding sequence of the first station area number ; The noise of the first distribution transformer is transformed by single-scale wavelet transform to obtain the corresponding low-frequency coefficient sequence and high frequency coefficient sequence , in descending order, from the low frequency coefficient sequence Before selection coefficients, and update the selected coefficients according to the corresponding values ​​in the encoding sequence of the first management password to obtain a modified low-frequency coefficient sequence , and at the same time, in descending order, from the high frequency coefficient sequence Before selection coefficients, and update the selected coefficients according to the corresponding values ​​in the coding sequence of the first station area number to obtain a modified high-frequency coefficient sequence ; The modified low-frequency coefficient sequence and high frequency coefficient sequence Perform inverse transform of single-scale wavelet transform to obtain the target signal.

[0006] Furthermore, the modified low-frequency coefficient sequence With the modified high frequency coefficient sequence The expression is as follows:

[0007]

[0008] in, Represents the modified low-frequency coefficient sequence The jth coefficient in Represents a sequence of low-frequency coefficients Middle The large coefficient, represents the value of the jth code in the code sequence of the first management password, Represents the modified low-frequency coefficient sequence The jth coefficient in Represents a sequence of low-frequency coefficients Middle The large coefficient, represents the value of the jth code in the code sequence of the first station area number, is the embedding coefficient.

[0009] Further, calculating the difference between the first mixed signal and the target signal and using it as the registration information specifically includes: Acquire the current first mixed signal and perform a single-scale wavelet transform to obtain a corresponding low-frequency coefficient sequence and a high-frequency coefficient sequence, calculate the difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal, and calculate the difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal; Repeat the previous step until the number of repetitions meets the requirement; Calculate the average value of the difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal each time , and calculate the average value of the difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal each time , and the average value and Save it locally as registration information.

[0010] Further, when the second mixed signal is corrected using the registration information, it specifically includes: Acquire the second mixed signal and perform single-scale wavelet transform to obtain a corresponding low-frequency coefficient sequence and a high-frequency coefficient sequence; The average Combined with the low-frequency coefficient sequence of the second mixed signal, the corrected low-frequency coefficient sequence of the second mixed signal is obtained, and the average value is The high frequency coefficient sequence is combined with the high frequency coefficient sequence of the second mixed signal to obtain a corrected high frequency coefficient sequence of the second mixed signal.

[0011] Further, when the second area number and the second management password are calculated based on the corrected second mixed signal and the second distribution transformer noise, it specifically includes: Performing single-scale wavelet transform on the noise of the second distribution transformer to obtain corresponding low-frequency coefficient sequence and high-frequency coefficient sequence; In order from large to small, select the low-frequency coefficient sequence of the second distribution transformer noise. coefficients, and according to the difference between the selected coefficients and the corresponding coefficients of the low-frequency coefficient sequence after the second mixed signal is corrected, restore the corresponding value in the encoding sequence of the second management password, Indicates the length of the encoding sequence of the first management password; In order from large to small, select the high-frequency coefficient sequence of the second distribution transformer noise. coefficients, and according to the difference between the selected coefficients and the corresponding coefficients of the high-frequency coefficient sequence corrected by the second mixed signal, restore the corresponding values ​​in the coding sequence of the second station area number, Indicates the length of the encoding sequence of the first station area number.

[0012] Furthermore, when restoring the corresponding value in the coding sequence of the second management password and restoring the corresponding value in the coding sequence of the second station area number, the expression is as follows:

[0013]

[0014] in, represents the value of the jth code in the code sequence of the second management password, represents the jth coefficient in the low-frequency coefficient sequence after correction of the second mixed signal, The first low-frequency coefficient sequence representing the noise of the second distribution transformer The large coefficient, represents the value of the jth code in the code sequence of the second station area number, represents the jth coefficient in the high-frequency coefficient sequence after correction of the second mixed signal, The first high frequency coefficient sequence representing the noise of the second distribution transformer Large coefficient.

[0015] The present invention also proposes a distribution network area intelligent device authentication system, including a configuration terminal, wherein the configuration terminal is programmed or configured to execute any one of the distribution network area intelligent device authentication methods.

[0016] The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the distribution network area intelligent device authentication methods are implemented. The present invention also proposes a computer program product, including a computer program, which, when executed by a processor, implements the steps of any one of the methods for authenticating intelligent devices in a distribution network area.

[0017] Compared with the prior art, the advantages of the present invention are: (1) The present invention can capture the noise information characteristics of the distribution transformer itself in the distribution network area, and can also capture the acoustic response curve characteristics of the configuration terminal. The relationship between the configuration terminal and the corresponding distribution network area can be bound without introducing additional hardware, thereby preventing unauthorized configuration terminals from operating and maintaining the intelligent devices in the distribution network area.

[0018] (2) The present invention can embed the management password of the intelligent device in the distribution network area into the authentication signal, so that the user can obtain the management password of the intelligent device in the distribution network area even in an environment with limited network signals. At the same time, since the noise information of the distribution transformer is required to extract the management password, the security of the management password will not be affected even if the authentication signal is stolen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a flow chart of a method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0021] Before introducing the specific embodiments of the present invention, related concepts or terms are first explained.

[0022] Configuration terminal: Configuration terminals play a vital role in smart grids. They are responsible for status collection, information upload, receiving control commands, and completing operations such as opening and closing of primary equipment. They mainly include smart terminals and merging units (MUs).

[0023] Embodiment 1 In order to solve the technical problem that the existing intelligent devices in the distribution network area have security threats due to the lack of legal verification, this embodiment proposes a distribution network area intelligent device authentication method, which is applied to the configuration terminal, provides a safe and simple authentication method for the distribution network area intelligent devices, and can be combined with the requirements of the distribution network safety work regulations. Figure 1 As shown, it includes the following two stages: S1) Registration phase, including the following steps: S101) obtaining a management password (referred to as the first management password in this embodiment for distinction) and a corresponding area number (referred to as the first area number in this embodiment for distinction) of a distribution network area intelligent device; S102) configuring the terminal to collect noise and generate an authentication signal: collecting the noise of the distribution transformer in the distribution network area (referred to as the first distribution transformer noise in this embodiment for distinction), calculating the target signal according to the first management password, the first area number and the first distribution transformer noise, and subtracting the noise from the target signal to obtain the authentication signal; S103) Play the authentication signal and calculate the difference, and save the registration information: Play the authentication signal and collect a mixed signal (referred to as the first mixed signal in this embodiment for distinction) including the played authentication signal and the first distribution transformer noise, calculate the difference between the first mixed signal and the target signal and use it as the registration information; S2) Authentication phase, including the following steps: S201) Obtain the area number of the distribution network area to be authenticated; S202) configuring the terminal to place and play the authentication signal: playing the authentication signal and collecting a mixed signal (referred to as the second mixed signal in this embodiment for distinction) including the played authentication signal and the distribution transformer noise of the distribution network area to be authenticated (referred to as the second distribution transformer noise in this embodiment for distinction), and correcting the second mixed signal using the registration information; S203) Extract and verify the management password and substation number: collect the noise of the second distribution transformer in the distribution network substation to be authenticated, and calculate the substation number (referred to as the second substation number in this embodiment for distinction) and the management password (referred to as the second management password in this embodiment for distinction) according to the corrected second mixed signal and the second distribution transformer noise. If the second substation number is consistent with the substation number of the distribution network substation to be authenticated, use the second management password to log in to the intelligent device of the distribution network substation to be authenticated for operation and maintenance.

[0024] Each step is described in detail below.

[0025] In step S101 of this embodiment, when obtaining the first management password of the distribution network area intelligent device and the corresponding first area number, the management password of the distribution network area intelligent device is obtained from the authentication server or the user input. And the corresponding area number If the mobile network in the distribution network area is in good condition, you can obtain the management password corresponding to the device from the master station. And the corresponding area number If the station cannot connect to the mobile network, the user can manually enter the management password corresponding to the device. And the corresponding area number .

[0026] In this embodiment, the configuration terminal is provided with a microphone and a speaker. In step S102, when collecting the noise of the first distribution transformer in the distribution network area, the configuration terminal is specifically placed near the distribution transformer in the area, so that the configuration terminal microphone can collect the noise of the distribution transformer and the sound signal of the configuration terminal speaker at the same time. Usually, the area smart device and the distribution transformer are arranged together, and the configuration terminal only needs to be placed in a suitable position in the distribution network area.

[0027] In step S102 of this embodiment, when the target signal is calculated according to the first management password, the first area number and the first distribution transformer noise, the following steps are included: S1021) The first management password and the first zone number Perform binary encoding respectively and convert them into corresponding encoding sequences and , and obtain the converted encoding sequence of the first management password Length and the first station area number coding sequence Length ; S1022) Performing a single-scale wavelet transform on the noise of the first distribution transformer to obtain a corresponding low-frequency coefficient sequence and high frequency coefficient sequence , in descending order, from the low frequency coefficient sequence Before selection coefficients, and update the selected coefficients according to the corresponding values ​​in the encoding sequence of the first management password to obtain a modified low-frequency coefficient sequence , and at the same time, in descending order, from the high frequency coefficient sequence Before selection coefficients, and update the selected coefficients according to the corresponding values ​​in the coding sequence of the first station area number to obtain a modified high-frequency coefficient sequence , the modified low-frequency coefficient sequence With the modified high frequency coefficient sequence The expression is as follows:

[0028]

[0029] in, Represents the modified low-frequency coefficient sequence The jth coefficient in Represents a sequence of low-frequency coefficients Middle The large coefficient, represents the value of the jth code in the code sequence of the first management password, Represents the modified low-frequency coefficient sequence The jth coefficient in Represents a sequence of low-frequency coefficients Middle The large coefficient, represents the value of the jth code in the code sequence of the first station area number, is the embedding coefficient; S1023) for the modified low-frequency coefficient sequence and high frequency coefficient sequence Perform inverse transform of single-scale wavelet transform to obtain the target signal.

[0030] After that, in step S102, the target signal is subtracted from the first distribution transformer noise in the time domain to obtain an authentication signal, which is expressed as follows:

[0031] in, Indicates the target signal, represents the noise of the first distribution transformer, Indicates the authentication signal.

[0032] In summary, in this embodiment, through step S102, the configuration terminal collects the noise of a distribution transformer. , calculate the authentication signal , the target signal after the authentication signal and the distribution transformer noise are superimposed in the time domain , after single-scale wavelet transform, its low-frequency coefficients Extract the management password of the intelligent device in the distribution network area , high frequency coefficient Extract the number information of the distribution network area .

[0033] In step S103 of this embodiment, the first mixed signal is marked as , play the authentication signal obtained in step S102 on the configuration terminal , and then configure the terminal's microphone to collect and include the authentication signal and noise signal Mixed Signals Since the speaker and microphone of the configuration device have their own unique acoustic response curve characteristics, the target signal and mixed signal There must be differences between them.

[0034] Therefore, calculating the difference between the first mixed signal and the target signal and using it as the registration information specifically includes: S1031) Obtain the current first mixed signal and perform a single-scale wavelet transform to obtain a corresponding low-frequency coefficient sequence and high frequency coefficient sequence , calculate the low-frequency coefficient sequence of the first mixed signal The difference between the low-frequency coefficient sequence of the target signal and the high-frequency coefficient sequence of the first mixed signal is calculated The difference between the high-frequency coefficient sequence of the target signal is expressed as follows:

[0035]

[0036] in, is the difference between the i-th coefficient of the low-frequency coefficient sequence of the target signal and the i-th coefficient of the low-frequency coefficient sequence of the first mixed signal, is the difference between the i-th coefficient of the high-frequency coefficient sequence of the target signal and the i-th coefficient of the high-frequency coefficient sequence of the first mixed signal, and are the i-th coefficient of the low-frequency coefficient sequence and the high-frequency coefficient sequence of the first mixed signal, respectively. and are the i-th coefficient of the low-frequency coefficient sequence and the high-frequency coefficient sequence of the target signal, respectively. is the length of the low-frequency coefficient sequence of the target signal, is the length of the high-frequency coefficient sequence of the target signal; S1032) Repeat step S1031 until the number of repetitions meets the requirement, and obtain the difference of multiple low-frequency coefficient sequences And the difference of multiple high-frequency coefficient sequences , calculate the difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal each time The average , and calculate the difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal each time The average , and the average value and Save it locally as registration information.

[0037] Specifically, assuming that step S1031 is repeated N times, then the average and for:

[0038]

[0039] in, The difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal The average value of the i-th coefficient of The difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal The average value of the i-th coefficient of represents the difference between the i-th coefficient of the low-frequency coefficient sequence of the first mixed signal for the kth time and the i-th coefficient of the low-frequency coefficient sequence of the target signal, Represents the difference between the i-th coefficient of the high-frequency coefficient sequence of the k-th first mixed signal and the i-th coefficient of the high-frequency coefficient sequence of the target signal.

[0040] In step S1032 of this embodiment, the average value and When saving locally as registration information, the specific information is the distribution network area number That is, the first zone number and authentication signal , the difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal The average The difference between the high frequency coefficient sequence of the first mixed signal and the high frequency coefficient sequence of the target signal The average The information is saved in the local configuration terminal as registration information. When saving, the first zone number and authentication signal can be encrypted using a standard symmetric encryption algorithm, such as AES. ,average value and The encrypted data is saved locally on the configuration terminal.

[0041] In step S201 of this embodiment, when obtaining the area number of the distribution network area to be authenticated, specifically, the operation and maintenance work ticket information is entered into the system to obtain the distribution network area number of this operation. After the user enters the operation and maintenance work ticket information into the system, the distribution network area number of this operation can be automatically read from the work ticket. .

[0042] In step S202 of this embodiment, before playing the authentication signal, the configuration terminal also needs to be placed near the distribution transformer of the distribution network area to be authenticated, so that the configuration terminal microphone can simultaneously collect the distribution transformer noise and the sound signal of the configuration terminal speaker. Usually, the area smart device and the distribution transformer are arranged together and only need to be placed in a suitable position in the distribution network area.

[0043] In step S202 of this embodiment, when playing the authentication signal and collecting the mixed signal including the played authentication signal and the noise of the second distribution transformer in the distribution network area to be authenticated, specifically, playing the authentication signal saved in the registration stage , and then the configuration terminal collects the authentication signal Sound signal mixed with the noise of the second distribution transformer .

[0044] In step S202 of this embodiment, when the second mixed signal is modified using the registration information, specifically the sound signal Perform single-scale wavelet transform to obtain its low-frequency coefficients And high frequency coefficients , the average difference saved in the registration phase and The low frequency coefficients obtained And high frequency coefficients Merge to get the corrected low-frequency coefficient and the corrected high frequency coefficients , specifically including: S2021) Obtain the second mixed signal And perform single-scale wavelet transform to obtain the corresponding low-frequency coefficient sequence and high frequency coefficient sequence ; S2022) will average and the low frequency coefficient sequence of the second mixed signal Merge to obtain the corrected low-frequency coefficient sequence of the second mixed signal , and the average value and the high frequency coefficient sequence of the second mixed signal Merge to obtain the corrected high-frequency coefficient sequence of the second mixed signal , the expression is as follows:

[0045]

[0046] in, represents the i-th coefficient in the low-frequency coefficient sequence after correction of the second mixed signal, represents the i-th coefficient in the high-frequency coefficient sequence of the second mixed signal after correction, represents the i-th coefficient in the frequency coefficient sequence of the second mixed signal, represents the i-th coefficient in the high-frequency coefficient sequence of the second mixed signal, The difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal The average value of the i-th coefficient of The difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal The average value of the i-th coefficient of .

[0047] In step S203 of this embodiment, the configuration terminal collects the noise of a distribution transformer. That is, the noise of the second distribution transformer. The collected noise signal Perform a single-scale wavelet transform to obtain the corresponding low-frequency coefficients and high frequency coefficients , combined with the corrected low-frequency coefficient With high frequency coefficient , extract the management password of the intelligent device in the distribution network area and the numbering information of the distribution network area , and the distribution network area number of this operation Compare and use the management password if they are consistent Log in to the intelligent device of the distribution network area to allow users to operate and maintain. Therefore, when the second area number and the second management password are calculated according to the corrected second mixed signal and the second distribution transformer noise, it specifically includes: S2031) The second distribution transformer noise Perform a single-scale wavelet transform to obtain the corresponding low-frequency coefficient sequence and high frequency coefficient sequence ; S2032) Select the low-frequency coefficient sequence of the second distribution transformer noise in descending order. forward coefficients, and the low-frequency coefficient sequence corrected by the selected coefficients and the second mixed signal The difference of the corresponding coefficients is used to restore the encoding sequence of the second management password The corresponding value in Indicates the length of the encoding sequence of the first management password; Similarly, in descending order, select the high-frequency coefficient sequence of the second distribution transformer noise forward coefficients, and the high frequency coefficient sequence corrected by the selected coefficients and the second mixed signal The difference of the corresponding coefficients restores the coding sequence of the second station area number The corresponding value in Indicates the length of the encoding sequence of the first station area number.

[0048] In this embodiment, the encoding sequence of the second management password is restored The corresponding value in and the encoding sequence to restore the second station area number When the corresponding value is , the expression is as follows:

[0049]

[0050] in, represents the value of the jth code in the code sequence of the second management password, represents the jth coefficient in the low-frequency coefficient sequence after correction of the second mixed signal, The first low-frequency coefficient sequence representing the noise of the second distribution transformer The large coefficient, represents the value of the jth code in the code sequence of the second station area number, represents the jth coefficient in the high-frequency coefficient sequence after correction of the second mixed signal, The first high frequency coefficient sequence representing the noise of the second distribution transformer Large coefficient.

[0051] It can be seen that the encoding sequence of the restored second management password And the coding sequence of the second station area number are binary sequences, based on the restored and You can get the second management password of the intelligent device in the distribution network area And the second area number information of the distribution network area , then verify the second area number information Check whether the workstation number obtained in step S201 matches. If so, use the restored second management password. Log in to the intelligent device in the distribution network area to allow users to operate and maintain.

[0052] Embodiment 2 This embodiment proposes a distribution network area intelligent device authentication system, including a configuration terminal, and the configuration terminal is programmed or configured to execute the distribution network area intelligent device authentication method described in the first embodiment.

[0053] This embodiment further proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the distribution network area intelligent device authentication method described in the first embodiment are implemented. This embodiment also proposes a computer program product, including a computer program, which, when executed by a processor, implements the steps of the distribution network area intelligent device authentication method described in the first embodiment.

[0054] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A distribution network area intelligent device authentication method, applied to configuration terminals, characterized in that: The following steps are involved: Obtain the first management password and the corresponding first area number of the distribution network area intelligent device; Collect the noise of the first distribution transformer in the distribution network area, calculate the target signal according to the first management password, the first area number and the noise of the first distribution transformer, and subtract the noise from the target signal to obtain the authentication signal; Playing an authentication signal and collecting a first mixed signal including the played authentication signal and noise from a first distribution transformer, and calculating a difference between the first mixed signal and a target signal as registration information; Get the area number of the distribution network area to be authenticated; Play the authentication signal and collect a second mixed signal including the played authentication signal and the noise of the second distribution transformer in the distribution network area to be authenticated, and use the registration information to correct the second mixed signal; The noise of the second distribution transformer in the distribution network area to be authenticated is collected, and the second area number and the second management password are calculated based on the corrected second mixed signal and the second distribution transformer noise. If the second area number is consistent with the area number of the distribution network area to be authenticated, the second management password is used to log in to the intelligent device of the distribution network area to be authenticated for operation and maintenance.

2. The method for authenticating intelligent devices in a distribution network area according to claim 1, characterized in that: When the target signal is obtained by calculating according to the first management password, the first area number and the first distribution transformer noise, the following steps are included: Convert the first management password and the first station area number into corresponding coding sequences respectively, and obtain the length of the converted coding sequence of the first management password and the length of the encoding sequence of the first station area number ; The noise of the first distribution transformer is transformed by single-scale wavelet to obtain the corresponding low-frequency coefficient sequence and high frequency coefficient sequence , in descending order, from the low frequency coefficient sequence Before selection coefficients, and update the selected coefficients according to the corresponding values ​​in the encoding sequence of the first management password to obtain a modified low-frequency coefficient sequence , and at the same time, in descending order, from the high frequency coefficient sequence Before selection coefficients, and update the selected coefficients according to the corresponding values ​​in the coding sequence of the first station area number to obtain a modified high-frequency coefficient sequence ; The modified low-frequency coefficient sequence and high frequency coefficient sequence Perform inverse transform of single-scale wavelet transform to obtain the target signal.

3. The method for authenticating intelligent devices in a distribution network area according to claim 2, characterized in that: Modified low-frequency coefficient sequence With the modified high frequency coefficient sequence The expression is as follows: in, Represents the modified low-frequency coefficient sequence The jth coefficient in Represents a sequence of low-frequency coefficients Middle The large coefficient, represents the value of the jth code in the code sequence of the first management password, Represents the modified low-frequency coefficient sequence The jth coefficient in Represents a sequence of low-frequency coefficients Middle The large coefficient, represents the value of the jth code in the code sequence of the first station area number, is the embedding coefficient.

4. The method for authenticating intelligent devices in a distribution network area according to claim 1, characterized in that: Calculating the difference between the first mixed signal and the target signal and using it as the registration information specifically includes: Acquire the current first mixed signal and perform a single-scale wavelet transform to obtain a corresponding low-frequency coefficient sequence and a high-frequency coefficient sequence, calculate the difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal, and calculate the difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal; Repeat the previous step until the number of repetitions meets the requirement; Calculate the average value of the difference between the low-frequency coefficient sequence of the first mixed signal and the low-frequency coefficient sequence of the target signal each time , and calculate the average value of the difference between the high-frequency coefficient sequence of the first mixed signal and the high-frequency coefficient sequence of the target signal each time , and the average value and Save it locally as registration information.

5. The method for authenticating intelligent devices in a distribution network area according to claim 4, characterized in that: When the second mixed signal is corrected using the registration information, it specifically includes: Acquire the second mixed signal and perform single-scale wavelet transform to obtain a corresponding low-frequency coefficient sequence and a high-frequency coefficient sequence; The average Combined with the low-frequency coefficient sequence of the second mixed signal, the corrected low-frequency coefficient sequence of the second mixed signal is obtained, and the average value is The high frequency coefficient sequence is combined with the high frequency coefficient sequence of the second mixed signal to obtain a corrected high frequency coefficient sequence of the second mixed signal.

6. The method for authenticating intelligent devices in a distribution network area according to claim 5, characterized in that: When the second area number and the second management password are calculated according to the corrected second mixed signal and the second distribution transformer noise, the method specifically includes: Performing single-scale wavelet transform on the noise of the second distribution transformer to obtain corresponding low-frequency coefficient sequence and high-frequency coefficient sequence; In order from large to small, select the low-frequency coefficient sequence of the second distribution transformer noise. coefficients, and according to the difference between the selected coefficients and the corresponding coefficients of the low-frequency coefficient sequence after the second mixed signal is corrected, restore the corresponding value in the encoding sequence of the second management password, Indicates the length of the encoding sequence of the first management password; In order from large to small, select the high-frequency coefficient sequence of the second distribution transformer noise coefficients, and according to the difference between the selected coefficients and the corresponding coefficients of the high-frequency coefficient sequence corrected by the second mixed signal, restore the corresponding values ​​in the coding sequence of the second station area number, Indicates the length of the encoding sequence of the first station area number.

7. The method for authenticating intelligent devices in a distribution network area according to claim 6, characterized in that: When restoring the corresponding value in the coding sequence of the second management password and restoring the corresponding value in the coding sequence of the second station area number, the expression is as follows: in, represents the value of the jth code in the code sequence of the second management password, represents the jth coefficient in the low-frequency coefficient sequence after the second mixed signal is corrected, The first low-frequency coefficient sequence representing the noise of the second distribution transformer The large coefficient, represents the value of the jth code in the code sequence of the second station area number, represents the jth coefficient in the high-frequency coefficient sequence after correction of the second mixed signal, The first high-frequency coefficient sequence representing the noise of the second distribution transformer Large coefficient.

8. A distribution network area intelligent device authentication system, including a configuration terminal, characterized in that: The configuration terminal is programmed or configured to execute the distribution network area intelligent device authentication method described in any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the distribution network area intelligent device authentication method described in any one of claims 1 to 7 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the distribution network area intelligent device authentication method described in any one of claims 1 to 7 are implemented.

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