10kV bus overvoltage monitoring and early warning method and device

Abstract

The invention relates to the technical field of bus voltage monitoring, in particular to a 10kV bus overvoltage monitoring and early warning method and device, and the method comprises the following steps: collecting a voltage signal on a bus, carrying out the first preprocessing of the collected voltage signal, and obtaining a voltage signal with higher resolution and accuracy; signal conditioning: carrying out secondary preprocessing on the voltage signal with relatively high resolution and accuracy to obtain a conditioned voltage signal; data acquisition and storage: acquiring and storing the conditioned voltage signal to obtain a high-precision voltage signal; the method comprises the following steps: constructing an overvoltage monitoring and early warning model, inputting a high-precision voltage signal into the constructed overvoltage monitoring and early warning model to judge whether the high-precision voltage signal is overvoltage, and if the high-precision voltage signal is overvoltage, sending an early warning short message in time, thereby solving the problem that when the bus is overvoltage, the overvoltage bus is not early warned and adjusted in time, so that the overvoltage of the high-precision voltage signal cannot be monitored. And the problems that the PT fuse of the voltage transformer is easy to fuse and the protection system of the section fails are solved.

Description

Technical Field

[0001] The invention relates to the technical field of bus voltage monitoring, and in particular to a 10kV bus overvoltage monitoring and early warning device. Background Art

[0002] With the continuous growth of electricity demand and the continuous expansion of the power grid, the busbar in the power system is an important hub for power transmission and distribution, and its operating status is directly related to the safety and stability of the entire power grid. In the power system, busbar overvoltage is a common electrical fault phenomenon, which may be caused by a variety of factors, such as lightning strikes, operating errors, and equipment failures.

[0003] If the bus overvoltage is not monitored and controlled in a timely and effective manner, it will not only cause equipment damage and grid disconnection, but also cause serious consequences such as large-scale power outages. Therefore, real-time monitoring and early warning of bus overvoltage are of great significance. Among them, the most common cause of bus overvoltage is resonance. The bus overvoltage caused by resonance will cause the voltage transformer PT fuse to blow, indirectly affecting the normal operation of the protection system.

[0004] In order to solve the problem that the voltage transformer PT fuse is easy to blow when the bus is overvoltage, the general improvement measure is to increase the capacity of the PT fuse. However, increasing the fuse capacity will not only increase the risk of PT overload itself, but may also cause PT damage, indirectly making this section of the protection system invalid. In addition, when a fault occurs, the failure of this section of the protection system will not only cause the upper level protection system to operate, but also cause over-tripping, thereby affecting the stable operation of the power system.

[0005] Therefore, it is necessary to monitor the bus overvoltage and issue overvoltage warning information in time to solve the problem of voltage transformer PT fuse easy melting and failure of this section protection system caused by failure to timely warn and adjust the overvoltage bus when the bus is overvoltage. Summary of the invention

[0006] The purpose of the present invention is to propose a 10kV bus overvoltage monitoring and early warning device to solve the problem that when the bus is overvoltage, the voltage transformer PT fuse is easily blown and the protection system of this section fails due to failure to timely warn and adjust the overvoltage bus.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The first aspect of the present application proposes a 10kV bus overvoltage monitoring and early warning method, comprising the following steps:

[0009] S1, collecting the voltage signal on the bus, performing the first preprocessing on the collected voltage signal, and obtaining a voltage signal with high resolution and accuracy;

[0010] S2, signal conditioning, performing a second preprocessing on the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal;

[0011] S3, data acquisition and storage, collecting and storing the conditioned voltage signal to obtain a high-precision voltage signal;

[0012] S4. Construct an overvoltage monitoring and early warning model, input the high-precision voltage signal into the constructed overvoltage monitoring and early warning model to judge whether the high-precision voltage signal is overvoltage, and send an early warning SMS if the high-precision voltage signal is overvoltage.

[0013] Preferably, the step S1, collecting the voltage signal on the bus, and performing a first preprocessing on the collected voltage signal to obtain a voltage signal with higher resolution and accuracy, comprises the following steps:

[0014] S1.1. Clamp the busbar to be tested with a voltage clamp, and the voltage sensor connected to the voltage clamp collects the voltage on the busbar to obtain a preliminary collected voltage signal;

[0015] S1.2, differentially inputting the initially collected voltage signal into an AD conversion chip connected to the voltage sensor to obtain a voltage signal with reduced noise and high accuracy;

[0016] S1.3. The voltage signal with reduced noise and high accuracy is input into the AD conversion chip. The AD conversion chip converts the ADC signal with higher bits on the AD conversion chip to obtain a voltage signal with higher resolution and accuracy.

[0017] Preferably, the S2, signal conditioning, performs a second preprocessing on the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal, as follows:

[0018] The voltage signal with higher resolution and accuracy is transmitted to the signal conditioning circuit connected to the AD conversion chip. The signal conditioning circuit filters and amplifies the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal.

[0019] Preferably, the step S3, data acquisition and storage, acquires and stores the conditioned voltage signal to obtain a high-precision voltage signal, as follows:

[0020] The conditioned voltage signal is transmitted to a data acquisition storage chip connected to the signal conditioning circuit. The data acquisition storage chip performs high-speed and high-precision acquisition on the conditioned voltage signal to obtain a high-precision voltage signal.

[0021] Preferably, the S4, constructing an overvoltage monitoring and early warning model, inputting the high-precision voltage signal into the constructed overvoltage monitoring and early warning model to judge whether the high-precision voltage signal is overvoltage, and sending an early warning text message if the high-precision voltage signal is overvoltage; comprises the following steps:

[0022] S4.1. Collecting previous voltage signal data, performing digital filtering on the previous voltage signal, and obtaining filtered voltage signal data;

[0023] S4.2, performing feature extraction and pattern recognition on the filtered voltage signal in turn to obtain a predicted value of the voltage signal;

[0024] S4.3, comparing the voltage signal prediction value with the overvoltage preset threshold value, and constructing an overvoltage monitoring and early warning model based on the comparison value between the voltage signal prediction value and the overvoltage preset threshold value;

[0025] S4.4. Input the high-precision voltage signal into the overvoltage monitoring and early warning model chip connected to the data acquisition and storage chip to determine whether the high-precision voltage signal is overvoltage. If the high-precision voltage signal is overvoltage, an early warning and text message are issued.

[0026] Preferably, in S4.4, if the high-precision voltage signal is overvoltage, a warning SMS is sent, as follows:

[0027] If the high-precision voltage signal is overvoltage, the high-precision voltage signal of the overvoltage is transmitted to the 4G communication chip connected to the overvoltage monitoring and early warning model chip, and the 4G communication chip sends an overvoltage early warning message to the mobile phone communicating with the 4G communication chip.

[0028] The second aspect of the present application proposes a 10kV bus overvoltage monitoring and early warning device, comprising:

[0029] The voltage signal acquisition and processing module is used to acquire the voltage signal on the busbar and perform initial preprocessing on the acquired voltage signal to obtain a voltage signal with high resolution and accuracy;

[0030] A voltage signal conditioning and processing module, the voltage signal conditioning and processing module is connected to the voltage signal acquisition and processing module, and the voltage signal conditioning and processing module performs a further preprocessing on the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal;

[0031] A data acquisition and storage module is connected to the voltage signal conditioning and processing module. The data acquisition and storage module is used to collect and store the conditioned voltage signal to obtain a high-precision voltage signal;

[0032] The voltage signal analysis / warning module is connected to the data acquisition and storage module. The voltage signal analysis and warning module is used to build an overvoltage monitoring and warning model to determine whether the high-precision voltage signal is overvoltage, and obtain a high-precision voltage signal of overvoltage and a high-precision voltage signal of no overvoltage;

[0033] The voltage warning communication sending module is connected to the voltage signal analysis / warning module. The warning communication sending module is used to send high-precision voltage signal warning information of overvoltage to the mobile phone in the form of text messages.

[0034] Preferably, a 10kV bus overvoltage monitoring and early warning device also includes a voltage early warning protection box, a voltage signal acquisition and processing module, a voltage signal conditioning and processing module, a data acquisition and storage module, and a voltage signal analysis / early warning module are respectively arranged inside the early warning protection box, and a voltage early warning communication sending module is arranged on one of the outer walls of the early warning protection box. A voltage monitoring interface connected to a voltage clamp is also arranged on the top of the early warning protection box, and the voltage monitoring interface is electrically connected to the voltage signal acquisition and processing module.

[0035] Preferably, a 10kV bus overvoltage monitoring and early warning device also includes a charging port and a display screen electrically connected to a voltage signal analysis / early warning module. The charging port and the display screen are both arranged on the top of the early warning protection box. The charging port is used to charge the display screen, the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / early warning module and the voltage early warning communication sending module.

[0036] Preferably, a 10kV busbar overvoltage monitoring and early warning device also includes a protective cover, which is hinged to the top edge of the early warning protection box.

[0037] During the working process, when using the 10kV busbar overvoltage monitoring and early warning device, first plug one end of the voltage clamp into the voltage monitoring interface on the top of the early warning protection box, and then put the voltage signal acquisition and processing module, voltage signal conditioning and processing module, data acquisition and storage module, voltage signal analysis / early warning module and voltage early warning communication sending module in the 10kV busbar overvoltage monitoring and early warning device into working state, and then clamp the busbar to be detected with the clamping end of the voltage clamp. At this time, the voltage signal acquisition and processing module connected to the other end of the voltage clamp through the voltage monitoring interface will first collect the voltage signal of the busbar, and then perform resolution and accuracy processing on the collected voltage signal to obtain a voltage signal with higher resolution and accuracy, and then transmit the voltage signal with higher resolution and accuracy to the voltage signal conditioning and processing module. The block filters and amplifies the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal, which is then transmitted to the data acquisition and storage module. The data acquisition and storage module performs high-speed and high-precision acquisition to obtain a high-precision voltage signal, which is then transmitted to the voltage signal analysis / warning module. The voltage signal analysis / warning module determines whether the high-precision voltage signal is overvoltage, and obtains a high-precision voltage signal of overvoltage and a high-precision voltage signal of no overvoltage. The high-precision voltage signal of overvoltage is then transmitted to the voltage warning communication sending module. The voltage warning communication sending module sends the high-precision voltage signal warning information of overvoltage to the maintenance personnel's mobile phone in the form of a text message. The maintenance personnel then eliminates the fault that causes the bus overvoltage, and the bus overvoltage condition is improved.

[0038] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0039] 1. The overvoltage monitoring and early warning model in the present invention can determine whether the bus is overvoltage through the overvoltage monitoring and early warning model when judging the overvoltage of the bus. If the voltage signal of the bus is overvoltage, the overvoltage early warning information is sent to the mobile phone of the maintenance personnel in time, and the maintenance personnel can eliminate the fault causing the overvoltage of the bus, and the overvoltage condition of the bus is improved, so as to solve the problem that when the bus is overvoltage, the voltage transformer PT fuse is easy to melt and the protection system of this section fails due to the failure to timely warn and adjust the overvoltage bus.

[0040] 2. In the present invention, the voltage signal on the bus is preliminarily collected through a voltage transformer, and then the collected voltage signal is filtered and amplified through a signal processing circuit to obtain a more accurate voltage signal, thereby indirectly improving the accuracy of subsequent voltage signal warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1It is a flow chart of the 10kV bus overvoltage monitoring and early warning method in the present invention.

[0042] Figure 2 It is a top view of the structure of the present invention.

[0043] Figure 3 It is an axonometric view of the structure of the present invention.

[0044] Figure 4 This is a schematic diagram of the connection of some modules in the 10kV bus overvoltage monitoring and early warning device in the structure of the present invention.

[0045] Figure 5 This is a circuit diagram of the voltage signal analysis / warning module in the structure of the present invention.

[0046] Figure 6 This is a circuit diagram of a voltage early warning communication sending module in the structure of the present invention.

[0047] Figure 7 It is a schematic diagram of the voltage early warning communication sending module chip in the structure of the present invention.

[0048] In the figure, 1-voltage warning protection box, 2-voltage monitoring interface, 3-charging port, 4-display screen, 5-protective cover. DETAILED DESCRIPTION

[0049] like Figure 1-7 In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] Example

[0051] When the busbar is over-voltaged, the voltage transformer PT fuse is prone to blowing. The general improvement measure is to increase the capacity of the PT fuse. However, increasing the fuse capacity will not only increase the risk of PT overload itself, but may also cause PT damage, indirectly making this section of the protection system invalid. Moreover, when a fault occurs, the failure of this section of the protection system will not only cause the upper level protection system to operate, but also cause over-tripping, thereby affecting the stable operation of the power system.

[0052] The present application proposes a 10kV bus overvoltage monitoring and early warning method and early warning device to solve the problem that when the bus is overvoltage, the voltage transformer PT fuse is easily blown and the protection system of this section fails due to the failure to timely warn and adjust the overvoltage bus.

[0053] For details, please refer to Figure 1 In a first aspect, the present application proposes a 10kV bus overvoltage monitoring and early warning method, comprising the following steps:

[0054] First, the voltage signal on the bus is collected, and the collected voltage signal is preprocessed for the first time to obtain a voltage signal with high resolution and accuracy, including the following steps:

[0055] The busbar to be tested is clamped with a voltage clamp, and a voltage sensor connected to the voltage clamp collects the voltage on the busbar to obtain a preliminary collected voltage signal;

[0056] The voltage signal collected initially is differentially input into an AD conversion chip connected to the voltage sensor to obtain a voltage signal with reduced noise and high accuracy;

[0057] The noise-reduced and highly accurate voltage signal is input into the AD conversion chip, and the AD conversion chip obtains a voltage signal with higher resolution and accuracy through ADC signal conversion with a higher number of bits on the AD conversion chip.

[0058] Second, signal conditioning, the voltage signal with higher resolution and accuracy is pre-processed for the second time to obtain the conditioned voltage signal, as follows:

[0059] The voltage signal with higher resolution and accuracy is transmitted to the signal conditioning circuit connected to the AD conversion chip. The signal conditioning circuit filters and amplifies the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal.

[0060] Third, data acquisition and storage: collect and store the conditioned voltage signal to obtain a high-precision voltage signal, as follows:

[0061] The conditioned voltage signal is transmitted to a data acquisition storage chip connected to the signal conditioning circuit. The data acquisition storage chip performs high-speed and high-precision acquisition on the conditioned voltage signal to obtain a high-precision voltage signal.

[0062] Fourth, construct an overvoltage monitoring and early warning model, input the high-precision voltage signal into the constructed overvoltage monitoring and early warning model, and judge whether the high-precision voltage signal is overvoltage. If the high-precision voltage signal is overvoltage, send an early warning SMS, including the following steps:

[0063] Collecting previous voltage signal data, performing digital filtering on the previous voltage signal, and obtaining filtered voltage signal data;

[0064] Perform feature extraction and pattern recognition on the filtered voltage signal in turn to obtain a predicted value of the voltage signal;

[0065] Compare the voltage signal prediction value with the overvoltage preset threshold value, and build an overvoltage monitoring and early warning model based on the comparison value between the voltage signal prediction value and the overvoltage preset threshold value;

[0066] The high-precision voltage signal is input into the overvoltage monitoring and early warning model chip connected to the data acquisition and storage chip to determine whether the high-precision voltage signal is overvoltage. If the high-precision voltage signal is overvoltage, an early warning and text message are issued.

[0067] It should be noted that if the high-precision voltage signal is overvoltage, a warning SMS will be sent, as follows: If the high-precision voltage signal is overvoltage, the high-precision voltage signal of the overvoltage will be transmitted to the 4G communication chip connected to the overvoltage monitoring and early warning model chip, and the 4G communication chip will send an overvoltage warning message to the mobile phone communicating with the 4G communication chip.

[0068] The above is a 10kV bus overvoltage monitoring and early warning method, and the following is a 10kV bus overvoltage monitoring and early warning device also provided in this application.

[0069] For details, please refer to Figure 2-6 , a 10kV busbar overvoltage monitoring and early warning device, comprising:

[0070] The voltage signal acquisition and processing module is used to acquire the voltage signal on the busbar and perform initial preprocessing on the acquired voltage signal to obtain a voltage signal with high resolution and accuracy;

[0071] A voltage signal conditioning and processing module, the voltage signal conditioning and processing module is connected to the voltage signal acquisition and processing module, and the voltage signal conditioning and processing module is used to pre-process the voltage signal with higher resolution and accuracy again to obtain a conditioned voltage signal;

[0072] A data acquisition and storage module is connected to the voltage signal conditioning and processing module. The data acquisition and storage module is used to collect and store the conditioned voltage signal to obtain a high-precision voltage signal;

[0073] The voltage signal analysis / warning module is connected to the data acquisition and storage module. The voltage signal analysis and warning module is used to build an overvoltage monitoring and warning model to determine whether the high-precision voltage signal is overvoltage, and obtain a high-precision voltage signal of overvoltage and a high-precision voltage signal of no overvoltage;

[0074] The voltage warning communication sending module is connected to the voltage signal analysis / warning module. The warning communication sending module is used to send high-precision voltage signal warning information of overvoltage to the mobile phone in the form of text messages.

[0075] In actual application, when using the 10kV busbar overvoltage monitoring and early warning device, first plug one end of the voltage clamp into the voltage monitoring interface on the top of the early warning protection box, and then put the voltage signal acquisition and processing module, voltage signal conditioning and processing module, data acquisition and storage module, voltage signal analysis / early warning module and voltage early warning communication sending module in the 10kV busbar overvoltage monitoring and early warning device into working state, and then clamp the busbar to be detected with the clamping end of the voltage clamp. At this time, the voltage signal acquisition and processing module connected to the other end of the voltage clamp through the voltage monitoring interface will first collect the voltage signal of the busbar, and then perform resolution and accuracy processing on the collected voltage signal to obtain a voltage signal with higher resolution and accuracy, and then transmit the voltage signal with higher resolution and accuracy to the voltage signal conditioning and processing module, and the voltage signal conditioning and processing The module filters and amplifies the voltage signal with high resolution and accuracy to obtain a conditioned voltage signal, which is then transmitted to the data acquisition and storage module. The data acquisition and storage module performs high-speed and high-precision acquisition to obtain a high-precision voltage signal, which is then transmitted to the voltage signal analysis / warning module. The voltage signal analysis / warning module determines whether the high-precision voltage signal is overvoltage, and obtains a high-precision voltage signal of overvoltage and a high-precision voltage signal of no overvoltage. The high-precision voltage signal of overvoltage is then transmitted to the voltage warning communication sending module. The voltage warning communication sending module sends the high-precision voltage signal warning information of overvoltage to the maintenance personnel's mobile phone in the form of a text message. The maintenance personnel then eliminates the fault that causes the bus overvoltage, and the bus overvoltage condition is improved.

[0076] It should be noted that the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / warning module and the voltage warning communication sending module are all existing integrated chips. Specifically, the voltage signal acquisition and processing module is composed of an integrated voltage acquisition circuit; the voltage signal conditioning and processing module is composed of an integrated voltage signal conditioning circuit; the data acquisition and storage module is composed of an integrated data acquisition and storage circuit; and the voltage warning communication sending module is composed of an integrated warning communication sending circuit.

[0077] See also Figure 1In order to facilitate the assembly and protection of the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / warning module and the voltage warning communication sending module, a 10kV bus overvoltage monitoring and early warning device also includes a voltage early warning protection box 1, the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module and the voltage signal analysis / warning module are respectively arranged inside the early warning protection box 1, the voltage early warning communication sending module is arranged on one of the outer side walls of the early warning protection box 1, and a voltage monitoring interface 2 connected to the voltage clamp is also arranged on the top of the early warning protection box 1, and the voltage monitoring interface 2 is electrically connected to the voltage signal acquisition and processing module.

[0078] In actual use, when assembling the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / early warning module and the voltage early warning communication sending module, the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module and the voltage signal analysis / early warning module can be integrated into the early warning protection box 1, so that the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module and the voltage signal analysis / early warning module can be well protected.

[0079] See also Figure 1 , to power the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / warning module and the voltage warning communication sending module, a 10kV bus overvoltage monitoring and early warning device also includes a charging port 3 and a display screen 4 electrically connected to the voltage signal analysis / warning module, the charging port 3 and the display screen 4 are both arranged on the top of the early warning protection box 1, and the charging port 3 is used to charge the display screen 4, the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / warning module and the voltage warning communication sending module.

[0080] In actual use, when powering the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / early warning module and the voltage early warning communication sending module, one end of the external power supply can be plugged into the charging port 3 on the top of the early warning protection box 1 to charge or power the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / early warning module and the voltage early warning communication sending module to ensure that the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / early warning module and the voltage early warning communication sending module can work stably.

[0081] It should be noted that the display screen 4 is used to display the data value of the bus overvoltage signal, so that maintenance personnel can accurately understand the value of the bus overvoltage.

[0082] See also Figure 2 When the 10kV busbar overvoltage monitoring and early warning device is not used, in order to protect the charging port 3 and the display screen 4, a 10kV busbar overvoltage monitoring and early warning device also includes a protective cover 5, which is hinged to the top edge of the early warning protection box 1.

[0083] In actual use, when the 10kV bus overvoltage monitoring and early warning device is not in use, the protective cover 5 can be placed on the top of the early warning protection box 1 to better protect the charging port 3 and the display screen 4, thereby extending the service life of the charging port 3 and the display screen 4.

[0084] The overvoltage monitoring and early warning model in the present application can determine whether the bus is overvoltage through the overvoltage monitoring and early warning model when judging the overvoltage of the bus. If the voltage signal of the bus is overvoltage, the overvoltage early warning information will be sent to the maintenance personnel's mobile phone in time. The maintenance personnel can then eliminate the fault that causes the bus overvoltage, and the bus overvoltage condition will be improved.

[0085] In this application, the voltage signal on the bus is preliminarily collected through a voltage transformer, and then the collected voltage signal is filtered and amplified by a signal processing circuit to obtain a more accurate voltage signal, thereby indirectly improving the accuracy of subsequent voltage signal warnings.

[0086] Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and implementations can be devised by those skilled in the art that will fall within the scope and spirit of the principles disclosed herein.

Claims

1. A 10kV busbar overvoltage monitoring and early warning method, characterized in that: The following steps are involved: S1, collecting the voltage signal on the bus, performing the first preprocessing on the collected voltage signal, and obtaining a voltage signal with high resolution and accuracy; S2, signal conditioning, performing a second preprocessing on the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal; S3, data acquisition and storage, collecting and storing the conditioned voltage signal to obtain a high-precision voltage signal; S4. Construct an overvoltage monitoring and early warning model, input the high-precision voltage signal into the constructed overvoltage monitoring and early warning model, and judge whether the high-precision voltage signal is overvoltage. If the high-precision voltage signal is overvoltage, send a warning SMS.

2. A 10kV busbar overvoltage monitoring and early warning method according to claim 1, characterized in that: The step of collecting the voltage signal on the bus and performing a first preprocessing on the collected voltage signal to obtain a voltage signal with high resolution and accuracy includes the following steps: S1.

1. Clamp the busbar to be tested with a voltage clamp, and the voltage sensor connected to the voltage clamp collects the voltage on the busbar to obtain a preliminary collected voltage signal; S1.2, differentially inputting the initially collected voltage signal into an AD conversion chip connected to the voltage sensor to obtain a voltage signal with reduced noise and high accuracy; S1..

3. The voltage signal with reduced noise and high accuracy is input into the AD conversion chip. The AD conversion chip converts the ADC signal with higher bit number on the AD conversion chip to obtain a voltage signal with higher resolution and accuracy.

3. A 10kV busbar overvoltage monitoring and early warning method according to claim 1, characterized in that: The signal conditioning described in S2 performs a second preprocessing on the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal, as follows: The voltage signal with higher resolution and accuracy is transmitted to the signal conditioning circuit connected to the AD conversion chip. The signal conditioning circuit filters and amplifies the voltage signal with higher resolution and accuracy to obtain a conditioned voltage signal.

4. A 10kV busbar overvoltage monitoring and early warning device according to claim 1, characterized in that: The data acquisition and storage described in S3 collects and stores the conditioned voltage signal to obtain a high-precision voltage signal, as follows: The conditioned voltage signal is transmitted to a data acquisition storage chip connected to the signal conditioning circuit. The data acquisition storage chip performs high-speed and high-precision acquisition on the conditioned voltage signal to obtain a high-precision voltage signal.

5. A 10kV busbar overvoltage monitoring and early warning method according to claim 1, characterized in that: The overvoltage monitoring and early warning model constructed in S4 includes inputting the high-precision voltage signal into the constructed overvoltage monitoring and early warning model, judging whether the high-precision voltage signal is overvoltage, and sending an early warning SMS if the high-precision voltage signal is overvoltage, including the following steps: S4.

1. Collecting previous voltage signal data, performing digital filtering on the previous voltage signal, and obtaining filtered voltage signal data; St4.2, perform feature extraction and pattern recognition on the filtered voltage signal in turn to obtain a predicted value of the voltage signal; S4.3, comparing the voltage signal prediction value with the overvoltage preset threshold value, and constructing an overvoltage monitoring and early warning model based on the comparison value between the voltage signal prediction value and the overvoltage preset threshold value; S4.

4. Input the high-precision voltage signal into the overvoltage monitoring and early warning model chip connected to the data acquisition and storage chip to determine whether the high-precision voltage signal is overvoltage. If the high-precision voltage signal is overvoltage, an early warning and text message are issued.

6. A 10kV busbar overvoltage monitoring and early warning method according to claim 5, characterized in that: As described in S4.4, if the high-precision voltage signal is overvoltage, a warning SMS is sent, as follows: If the high-precision voltage signal is overvoltage, the high-precision voltage signal of the overvoltage is transmitted to the 4G communication chip connected to the overvoltage monitoring and early warning model chip, and the 4G communication chip sends an overvoltage early warning message to the mobile phone communicating with the 4G communication chip.

7. A 10kV busbar overvoltage monitoring and early warning device, characterized in that: include The voltage signal acquisition and processing module is used to acquire the voltage signal on the busbar and perform initial preprocessing on the acquired voltage signal to obtain a voltage signal with higher resolution and accuracy; A voltage signal conditioning and processing module, the voltage signal conditioning and processing module is connected to the voltage signal acquisition and processing module, and the voltage signal conditioning and processing module is used to pre-process the voltage signal with higher resolution and accuracy again to obtain a conditioned voltage signal; A data acquisition and storage module is connected to the voltage signal conditioning and processing module. The data acquisition and storage module is used to collect and store the conditioned voltage signal to obtain a high-precision voltage signal; The voltage signal analysis / warning module is connected to the data acquisition and storage module. The voltage signal analysis and warning module is used to build an overvoltage monitoring and warning model to determine whether the high-precision voltage signal is overvoltage, and obtain a high-precision voltage signal of overvoltage and a high-precision voltage signal of no overvoltage; The voltage warning communication sending module is connected to the voltage signal analysis / warning module. The warning communication sending module is used to send high-precision voltage signal warning information of overvoltage to the mobile phone in the form of text messages.

8. A 10kV busbar overvoltage monitoring and early warning device according to claim 7, characterized in that: It also comprises a voltage early warning protection box (1), a voltage signal acquisition and processing module, a voltage signal conditioning and processing module, a data acquisition and storage module and a voltage signal analysis / early warning module are respectively arranged inside the early warning protection box (1), a voltage early warning communication sending module is arranged on one of the outer walls of the early warning protection box (1), and a voltage monitoring interface (2) connected to the voltage clamp is also arranged on the top of the early warning protection box (1), and the voltage monitoring interface (2) is electrically connected to the voltage signal acquisition and processing module.

9. A 10kV busbar overvoltage monitoring and early warning device according to claim 8, characterized in that: It also includes a charging port (3) and a display screen (4) electrically connected to the voltage signal analysis / warning module, the charging port (3) and the display screen (4) are both arranged on the top of the warning protection box (1), and the charging port (3) is used to charge the display screen (4), the voltage signal acquisition and processing module, the voltage signal conditioning and processing module, the data acquisition and storage module, the voltage signal analysis / warning module, and the voltage warning communication sending module.

10. A 10kV busbar overvoltage monitoring and early warning device according to claim 9, characterized in that: It also includes a protective cover (5), which is hinged to the top edge of the early warning protection box (1).

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